/* ==========================================================================
   IPLCSub (iplcsub.cyou) - 官方极速落地页纯原生样式表
   规范：纯原生 CSS · 零外部重型框架 · 秒开级性能 · 全端自适应响应式
   ========================================================================== */

:root {
  --bg-main: #060913;
  --bg-darker: #04060d;
  --bg-card: rgba(13, 20, 38, 0.76);
  --bg-card-hover: rgba(18, 30, 58, 0.9);
  --bg-card-featured: rgba(16, 26, 52, 0.94);
  
  --border-subtle: rgba(56, 189, 248, 0.12);
  --border-glow: rgba(56, 189, 248, 0.32);
  --border-featured: rgba(0, 242, 254, 0.55);

  --primary: #00f2fe;
  --primary-hover: #38bdf8;
  --primary-glow: rgba(0, 242, 254, 0.35);

  --accent-cyan: #38bdf8;
  --accent-purple: #818cf8;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  --text-main: #f8fafc;
  --text-sub: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dark: #0f172a;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  --shadow-card: 0 12px 34px rgba(0, 0, 0, 0.42);
  --shadow-glow: 0 0 28px rgba(0, 242, 254, 0.22);

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

  --transition: all 0.26s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}

body {
  position: relative;
  overflow-x: hidden;
  background-color: var(--bg-main);
  min-height: 100vh;
}

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

/* 绝美动态神尊天狐 (8K超高清大师级灵狐 · 居中恢弘巨像与空灵呼吸) */
.bg-fox-wrapper {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(920px, 86vw);
  height: min(920px, 86vw);
  pointer-events: none;
  z-index: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  mix-blend-mode: screen;
  opacity: 0.80;
  animation: celestialFloatCenter 7s ease-in-out infinite;
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.4, 1), opacity 0.5s ease;
}

@keyframes celestialFloatCenter {
  0%, 100% {
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    transform: translate(-50%, -52.5%) scale(1.025);
  }
}

.bg-fox-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  mask-image: radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 1) 48%, rgba(0, 0, 0, 0) 74%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 1) 48%, rgba(0, 0, 0, 0) 74%);
  filter: drop-shadow(0 0 45px rgba(0, 242, 254, 0.45)) drop-shadow(0 0 85px rgba(245, 158, 11, 0.35));
}

@media (max-width: 1024px) {
  .bg-fox-wrapper {
    width: min(680px, 94vw);
    height: min(680px, 94vw);
    opacity: 0.62;
  }
}

.site-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部导航栏 */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(6, 9, 19, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(56, 189, 248, 0.12);
  transition: var(--transition);
}

.site-header.header-scrolled {
  background: rgba(4, 6, 13, 0.94);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
  border-bottom-color: rgba(56, 189, 248, 0.22);
}

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

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: var(--transition);
}

.logo:hover {
  transform: translateY(-1px);
  filter: drop-shadow(0 0 10px rgba(0, 242, 254, 0.4));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

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

/* 按钮系统 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #00f2fe 0%, #38bdf8 100%);
  color: #040914;
  box-shadow: 0 4px 18px rgba(0, 242, 254, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #38bdf8 0%, #00f2fe 100%);
  box-shadow: 0 6px 24px rgba(0, 242, 254, 0.55);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(56, 189, 248, 0.12);
  color: var(--text-main);
  border: 1px solid var(--border-glow);
}

.btn-secondary:hover {
  background: rgba(56, 189, 248, 0.22);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
}

/* 移动端汉堡按钮 */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
}

/* 通用板块标题 */
.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 12px;
  padding: 4px 14px;
  background: rgba(0, 242, 254, 0.1);
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 242, 254, 0.25);
}

.section-title {
  font-size: clamp(1.9rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.28;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-sub);
  line-height: 1.68;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(14, 25, 48, 0.85);
  border: 1px solid rgba(56, 189, 248, 0.35);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  color: #38bdf8;
  margin-bottom: 28px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

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

@keyframes pulseAnimation {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.8; }
}

.hero-title {
  margin-bottom: 24px;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.85);
}

.hero-title .hero-brand {
  display: block;
  font-size: clamp(2.8rem, 5.8vw, 4.4rem);
  font-weight: 900;
  color: #ffffff;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  text-shadow: 0 4px 28px rgba(0, 0, 0, 0.9);
}

.hero-title .text-gradient {
  display: block;
  font-size: clamp(1.35rem, 2.5vw, 2.2rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, #e0f2fe 0%, #7dd3fc 35%, #00f2fe 70%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 18px rgba(0, 242, 254, 0.65)) drop-shadow(0 4px 16px rgba(0, 0, 0, 0.9));
}

.nowrap {
  white-space: nowrap;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-sub);
  max-width: 860px;
  margin: 0 auto 38px;
  line-height: 1.7;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.85);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.stat-item {
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

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

.stat-num {
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  font-weight: 800;
  color: var(--primary);
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   价格方案 (Pricing) - 【所有价格同排展示】
   ========================================================================== */
.pricing-section {
  padding: 85px 0;
  position: relative;
}

.pricing-header-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 18px;
}

/* 核心：桌面端严格 5 列同排展现 */
.pricing-grid-same-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  align-items: stretch;
}

.price-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.price-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card), 0 0 20px rgba(56, 189, 248, 0.18);
  background: var(--bg-card-hover);
}

/* 爆款旗舰推荐款卡片高亮 */
.price-card.featured {
  background: var(--bg-card-featured);
  border: 1.5px solid var(--border-featured);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  transform: translateY(-4px);
}

.price-card.featured:hover {
  transform: translateY(-9px);
  border-color: #00f2fe;
}

.featured-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #00f2fe 0%, #38bdf8 100%);
  color: #030814;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 242, 254, 0.4);
}

.plan-header {
  text-align: center;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 20px;
}

.plan-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  min-height: 38px;
  line-height: 1.4;
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  margin: 14px 0 10px;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}

.price-amount {
  font-size: 2.3rem;
  font-weight: 900;
  color: #ffffff;
  font-family: var(--font-mono);
  line-height: 1;
}

.price-period {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.plan-traffic-pill {
  display: inline-block;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
}

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

.feature-check-item {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 0.86rem;
  color: var(--text-sub);
  line-height: 1.45;
}

.feature-check-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--primary);
}

/* ==========================================================================
   核心技术特性 (Features)
   ========================================================================== */
.features-section {
  padding: 85px 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-card);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(56, 189, 248, 0.05));
  border: 1px solid rgba(56, 189, 248, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.65;
}

/* ==========================================================================
   客户端生态全支持 (Client Ecosystem)
   ========================================================================== */
.clients-section {
  padding: 80px 0;
  background: linear-gradient(180deg, rgba(6, 9, 19, 0) 0%, rgba(13, 20, 38, 0.5) 50%, rgba(6, 9, 19, 0) 100%);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.client-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: var(--transition);
}

.client-box:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.client-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.client-os {
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

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

/* ==========================================================================
   精选文章推荐板块 (Articles / SEO Hub)
   ========================================================================== */
.articles-section {
  padding: 85px 0;
  position: relative;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
}

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

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.82rem;
}

.article-tag {
  color: var(--primary);
  font-weight: 700;
  background: rgba(0, 242, 254, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

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

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: 10px;
  transition: var(--transition);
}

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

.article-card-excerpt {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-link-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

/* ==========================================================================
   用户真实评价 (Testimonials)
   ========================================================================== */
.testimonials-section {
  padding: 85px 0;
  position: relative;
}

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

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-sm);
}

.rating-stars {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 14px;
}

.testimonial-text {
  font-size: 0.92rem;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 20px;
  font-style: italic;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00f2fe, #818cf8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #040914;
  font-size: 1rem;
}

.user-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
}

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

/* ==========================================================================
   常见问题 FAQ
   ========================================================================== */
.faq-section {
  padding: 85px 0;
  position: relative;
}

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

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

.faq-item.active {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #ffffff;
  user-select: none;
}

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

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 24px 22px;
}

/* ==========================================================================
   外链工具与技术生态 (External Links & Ecosystem)
   ========================================================================== */
.tools-section {
  padding: 60px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.tool-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(13, 20, 38, 0.5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  text-decoration: none;
  color: var(--text-sub);
  transition: var(--transition);
}

.tool-card:hover {
  border-color: var(--border-glow);
  color: var(--primary);
  background: rgba(18, 30, 58, 0.7);
  transform: translateY(-2px);
}

.tool-icon {
  color: var(--primary);
  flex-shrink: 0;
}

.tool-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: #ffffff;
}

.tool-desc {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* ==========================================================================
   底部页脚 (Site Footer)
   ========================================================================== */
.site-footer {
  background: var(--bg-darker);
  border-top: 1px solid rgba(56, 189, 248, 0.14);
  padding: 60px 0 30px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-desc {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.65;
  margin: 16px 0 20px;
  max-width: 380px;
}

.footer-col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

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

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.84rem;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   响应式断点适配 (Responsive Media Queries)
   ========================================================================== */
@media (max-width: 1200px) {
  .pricing-grid-same-row {
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
  }
  .price-card {
    padding: 22px 14px;
  }
  .price-amount {
    font-size: 1.95rem;
  }
}

@media (max-width: 1024px) {
  .pricing-grid-same-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .features-grid,
  .articles-grid,
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(6, 9, 19, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 30px 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-glow);
    display: none;
  }
  .nav-links.nav-open {
    display: flex;
  }
  .header-actions .btn-secondary {
    display: none;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-item {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 12px;
  }
  .pricing-grid-same-row {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }
  .features-grid,
  .articles-grid,
  .testimonials-grid,
  .tools-grid {
    grid-template-columns: 1fr;
  }
  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}