/* ==========================================================================
   影子官网 (shadowjichang.homes) - 官方正版企业级落地页样式表
   设计风格：沉浸式暗黑科技 / 拟态玻璃质感 / 全端响应式适配 / 极速性能
   ========================================================================== */

:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #111622;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(26, 34, 52, 0.9);
  --bg-card-featured: rgba(30, 27, 75, 0.6);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.4);
  --border-accent: rgba(56, 189, 248, 0.4);

  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-light: #cbd5e1;

  --primary: #38bdf8;
  --primary-hover: #0ea5e9;
  --primary-glow: rgba(56, 189, 248, 0.25);

  --accent-purple: #818cf8;
  --accent-pink: #ec4899;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;

  --gradient-brand: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --gradient-btn: linear-gradient(135deg, #0284c7 0%, #6366f1 100%);
  --gradient-btn-hover: linear-gradient(135deg, #0369a1 0%, #4f46e5 100%);

  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 25px -3px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 35px -5px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.25);
  --shadow-card-hover: 0 15px 30px -5px rgba(0, 0, 0, 0.7), 0 0 15px rgba(99, 102, 241, 0.2);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

/* 动态背景画布 */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
  opacity: 0.95;
}

/* ================= 影子专属背景视觉元素 (Shadow Theme Layers) ================= */
.shadow-bg-elements {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -3;
  pointer-events: none;
  overflow: hidden;
}

.shadow-watermark {
  position: absolute;
  font-family: var(--font-sans);
  font-weight: 900;
  text-transform: uppercase;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(56, 189, 248, 0.045);
  text-shadow: 
    0 0 50px rgba(56, 189, 248, 0.08),
    30px 40px 90px rgba(0, 0, 0, 0.95),
    -15px -15px 50px rgba(129, 140, 248, 0.05);
  user-select: none;
  line-height: 1;
  letter-spacing: 0.06em;
  opacity: 0.7;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.shadow-wm-1 {
  font-size: clamp(8rem, 20vw, 24rem);
  top: 6%;
  left: -2%;
  transform: rotate(-7deg);
  animation: shadowFloat1 26s ease-in-out infinite alternate;
}

.shadow-wm-2 {
  font-size: clamp(6rem, 15vw, 18rem);
  top: 45%;
  right: -4%;
  transform: rotate(5deg);
  -webkit-text-stroke: 1.5px rgba(129, 140, 248, 0.04);
  text-shadow: 
    0 0 60px rgba(129, 140, 248, 0.08),
    -30px 40px 100px rgba(0, 0, 0, 0.95);
  animation: shadowFloat2 30s ease-in-out infinite alternate-reverse;
}

.shadow-wm-3 {
  font-size: clamp(5rem, 12vw, 13rem);
  bottom: 3%;
  left: 8%;
  transform: rotate(-3deg);
  -webkit-text-stroke: 1px rgba(56, 189, 248, 0.035);
  animation: shadowFloat1 34s ease-in-out infinite alternate;
}

@keyframes shadowFloat1 {
  0% { transform: rotate(-7deg) translate(0, 0); }
  50% { transform: rotate(-5deg) translate(35px, 45px); }
  100% { transform: rotate(-9deg) translate(-25px, 20px); }
}

@keyframes shadowFloat2 {
  0% { transform: rotate(5deg) translate(0, 0); }
  50% { transform: rotate(7deg) translate(-40px, -35px); }
  100% { transform: rotate(3deg) translate(30px, -20px); }
}

/* 动态暗影渐晕与光影掠射层 */
.shadow-vignette {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 45%, rgba(10, 13, 20, 0.2) 20%, rgba(10, 13, 20, 0.88) 100%);
  mix-blend-mode: multiply;
}

.shadow-light-beam {
  position: absolute;
  top: -25%;
  left: 15%;
  width: 70%;
  height: 150%;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.05) 0%, rgba(129, 140, 248, 0.02) 35%, transparent 65%);
  transform: rotate(-25deg);
  filter: blur(70px);
  animation: beamShift 22s ease-in-out infinite alternate;
}

@keyframes beamShift {
  0% { transform: rotate(-25deg) translate(-50px, -20px); opacity: 0.5; }
  50% { transform: rotate(-20deg) translate(40px, 30px); opacity: 0.85; }
  100% { transform: rotate(-28deg) translate(-30px, -40px); opacity: 0.55; }
}

/* 氛围光晕层 */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.22;
}
.ambient-glow-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #38bdf8 0%, rgba(56, 189, 248, 0) 70%);
  top: -150px;
  left: 10%;
  animation: floatOrb 18s ease-in-out infinite alternate;
}
.ambient-glow-2 {
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, #818cf8 0%, rgba(129, 140, 248, 0) 70%);
  top: 35%;
  right: -100px;
  animation: floatOrb 22s ease-in-out infinite alternate-reverse;
}
.ambient-glow-3 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #0284c7 0%, rgba(2, 132, 199, 0) 70%);
  bottom: 10%;
  left: 5%;
  animation: floatOrb 16s ease-in-out infinite alternate;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 60px) scale(1.1); }
  100% { transform: translate(-30px, 30px) scale(0.95); }
}

/* 通用容器 */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

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

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

ul, ol {
  list-style: none;
}

/* ================= 导航栏 (Navbar) ================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 16px 0;
  background: rgba(10, 13, 20, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.navbar-scrolled {
  padding: 12px 0;
  background: rgba(10, 13, 20, 0.94);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

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

/* 左上角官方LOGO */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.logo-img-wrap {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.logo-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* 导航链接 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 18px;
  white-space: nowrap;
}

.nav-menu .mobile-cta {
  display: none; /* 桌面端严格隐藏，避免出现重复按钮挤占导航栏宽度 */
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-light);
  padding: 8px 4px;
  position: relative;
  white-space: nowrap; /* 核心：文字严格单行并行排列，绝对不换行 */
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
  border-radius: 2px;
}

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

.nav-badge-hot {
  font-size: 0.65rem;
  font-weight: 700;
  background: linear-gradient(135deg, #ef4444, #f59e0b);
  color: #fff;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  margin-left: 2px;
  vertical-align: middle;
  white-space: nowrap;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  white-space: nowrap;
}

/* 按钮通用样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 11px 22px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-btn);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(14, 165, 233, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.btn-primary:hover {
  background: var(--gradient-btn-hover);
  box-shadow: 0 6px 24px rgba(14, 165, 233, 0.55);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-glow {
  position: relative;
  overflow: hidden;
}

.btn-glow::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 70%);
  transform: rotate(30deg);
  opacity: 0;
  transition: var(--transition);
}

.btn-glow:hover::after {
  opacity: 1;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 14px 30px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* 汉堡按钮 (移动端) */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
}

.mobile-toggle svg {
  width: 26px;
  height: 26px;
  display: block;
}

/* ================= 英雄首屏区 (Hero Section) ================= */
.hero-section {
  padding-top: 140px;
  padding-bottom: 70px;
  position: relative;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-green);
  display: inline-block;
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.hero-title-highlight {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline;
}

.hero-desc {
  font-size: clamp(1.02rem, 2vw, 1.25rem);
  color: var(--text-light);
  line-height: 1.7;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 34px;
}

.hero-keywords-tag {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 36px;
}

.kw-badge {
  font-size: 0.78rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.09);
  color: var(--text-muted);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.kw-badge-primary {
  color: var(--primary) !important;
  border-color: rgba(56, 189, 248, 0.45) !important;
  background: rgba(56, 189, 248, 0.12) !important;
  font-weight: 700;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.2);
}

.kw-badge:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(56, 189, 248, 0.08);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 1040px;
  margin-left: auto;
  margin-right: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 24px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-md);
}

.hero-stat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 12px;
  border-right: 1px solid var(--border-color);
}

.hero-stat-card:last-child {
  border-right: none;
}

.stat-number {
  font-size: 1.85rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.stat-number span {
  color: var(--primary);
  font-size: 1.15rem;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ================= 核心优势 (Features Section) ================= */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 50px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: var(--transition);
}

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

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

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 22px;
}

.feature-icon-box svg {
  width: 26px;
  height: 26px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
}

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

/* ================= 定价专区 (Pricing Section - 必须同排展示) ================= */
.pricing-section {
  padding: 85px 0;
  position: relative;
  background: linear-gradient(180deg, rgba(17, 22, 34, 0.4) 0%, rgba(10, 13, 20, 0.6) 100%);
}

.pricing-notice-banner {
  background: rgba(56, 189, 248, 0.08);
  border: 1px dashed rgba(56, 189, 248, 0.35);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  text-align: center;
  font-size: 0.9rem;
  color: var(--primary);
  margin-bottom: 36px;
}

/* 核心要求：所有价格卡片在桌面端必须同排 (3列并排、等高对齐) */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch; /* 确保所有卡片等高同排 */
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between; /* 按钮与特性严格对齐 */
  position: relative;
  box-shadow: var(--shadow-md);
}

.pricing-card:hover {
  transform: translateY(-5px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: var(--shadow-card-hover);
}

/* 主推推荐卡片 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.85) 0%, rgba(15, 23, 42, 0.9) 100%);
  border: 2px solid #38bdf8;
  box-shadow: 0 10px 35px -5px rgba(56, 189, 248, 0.3);
  transform: scale(1.02);
}

.pricing-card.featured:hover {
  transform: scale(1.02) translateY(-5px);
  box-shadow: 0 15px 40px -5px rgba(56, 189, 248, 0.45);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #0284c7 0%, #6366f1 100%);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.4);
  white-space: nowrap;
}

.plan-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  min-height: 42px;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 18px 0 12px 0;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
  letter-spacing: -0.03em;
}

.price-period {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 500;
}

.plan-traffic-highlight {
  display: inline-block;
  background: rgba(56, 189, 248, 0.12);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  width: 100%;
  text-align: center;
}

.plan-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 30px;
  flex-grow: 1;
}

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

.plan-feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--accent-green);
  flex-shrink: 0;
  margin-top: 2px;
}

.pricing-btn {
  width: 100%;
}

/* ================= 机场推荐与技术评测文章 (Articles Section) ================= */
.articles-section {
  padding: 85px 0;
  position: relative;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
}

.article-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: var(--shadow-card-hover);
}

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

.article-category {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(56, 189, 248, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.article-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.article-card-title {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: #ffffff;
}

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

.article-card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.article-card-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.article-read-btn {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

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

/* ================= 用户真实评价 (Reviews Section) ================= */
.reviews-section {
  padding: 80px 0;
  position: relative;
  background: rgba(17, 22, 34, 0.5);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-md);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0ea5e9, #6366f1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.2);
}

.review-user-info {
  display: flex;
  flex-direction: column;
}

.review-name {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 6px;
}

.verified-badge {
  font-size: 0.68rem;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.review-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.review-stars {
  color: #fbbf24;
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.review-content {
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.65;
  margin-bottom: 16px;
  font-style: italic;
}

.review-footer {
  font-size: 0.78rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
  display: flex;
  justify-content: space-between;
}

/* ================= 常见问题 FAQ (FAQ Section) ================= */
.faq-section {
  padding: 80px 0;
  position: relative;
}

.faq-list {
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.faq-item:hover {
  border-color: rgba(56, 189, 248, 0.3);
}

.faq-summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  list-style: none;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--primary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px 24px;
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 16px;
}

/* ================= 生态外链与客户端推荐 (External Links Section) ================= */
.ecosystem-section {
  padding: 70px 0;
  position: relative;
  background: rgba(17, 22, 34, 0.3);
}

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

.ecosystem-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}

.ecosystem-card:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
}

.eco-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.eco-info h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 2px;
}

.eco-info p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ================= 页脚 (Footer) ================= */
.footer {
  background: #080a10;
  border-top: 1px solid var(--border-color);
  padding: 65px 0 35px 0;
  position: relative;
  font-size: 0.9rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 45px;
}

.footer-brand p {
  color: var(--text-muted);
  margin-top: 14px;
  max-width: 320px;
  line-height: 1.65;
  font-size: 0.88rem;
}

.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: 0.03em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-muted);
}

.footer-col a:hover {
  color: var(--primary);
  transform: translateX(3px);
}

.footer-keywords-cloud {
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  margin-bottom: 25px;
}

.footer-keywords-cloud h6 {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-kw-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-kw-list a {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-kw-list a:hover {
  color: var(--primary);
  border-color: rgba(56, 189, 248, 0.2);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.footer-legal-links {
  display: flex;
  gap: 20px;
}

/* ================= 文章页专项样式 (Article Single Page) ================= */
.article-page-header {
  padding-top: 130px;
  padding-bottom: 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(180deg, rgba(14, 165, 233, 0.06) 0%, rgba(10, 13, 20, 0) 100%);
}

.breadcrumbs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.breadcrumbs a:hover {
  color: var(--primary);
}

.article-main-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.35;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 18px;
  color: #ffffff;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.article-content-body {
  max-width: 860px;
  margin: 50px auto;
  font-size: 1.05rem;
  line-height: 1.85;
  color: #e2e8f0;
}

.article-content-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #ffffff;
  margin: 40px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-content-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #f1f5f9;
  margin: 28px 0 12px 0;
}

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

.article-content-body ul, .article-content-body ol {
  margin: 16px 0 24px 20px;
}

.article-content-body li {
  margin-bottom: 10px;
  list-style-type: disc;
}

.article-content-body strong {
  color: #ffffff;
}

.article-callout {
  background: rgba(56, 189, 248, 0.08);
  border-left: 4px solid var(--primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 30px 0;
  font-size: 0.98rem;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95));
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 35px 30px;
  text-align: center;
  margin: 50px 0;
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.15);
}

.article-cta-box h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #ffffff;
}

.article-cta-box p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 24px auto;
}

.related-articles {
  margin-top: 60px;
  border-top: 1px solid var(--border-color);
  padding-top: 40px;
}

/* ================= 移动端适配 (Responsive Design) ================= */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .ecosystem-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .hero-stat-card:nth-child(2) {
    border-right: none;
  }
}

@media (max-width: 820px) {
  /* 移动端菜单控制 */
  .mobile-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(10, 13, 20, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-actions {
    display: none;
  }

  .nav-menu .mobile-cta {
    display: block;
    width: 100%;
    margin-top: 10px;
  }

  /* 价格同排在移动端的响应式优化 */
  .pricing-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .pricing-card.featured {
    transform: none;
  }

  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }

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

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

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

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

  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 14px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  .hero-desc {
    font-size: 0.95rem;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .hero-stats-grid {
    grid-template-columns: 1fr 1fr;
    padding: 16px;
  }
  .pricing-card {
    padding: 28px 20px;
  }
  .article-card {
    padding: 22px 18px;
  }
}