/* ========================================================
   云海互联 (oceancloud.homes) 官方落地页 原生纯净 CSS
   秒开级别极速加载 / 纯原生无框架 / 硬件加速渲染 / 响应式全适配
   ======================================================== */

:root {
  --bg-primary: #050b17;
  --bg-secondary: #0c172e;
  --bg-card: rgba(13, 25, 48, 0.72);
  --bg-card-hover: rgba(20, 36, 68, 0.85);
  --border-color: rgba(56, 189, 248, 0.18);
  --border-hover: rgba(56, 189, 248, 0.55);
  
  --primary: #00f2fe;
  --primary-hover: #38bdf8;
  --secondary: #3b82f6;
  --accent-cyan: #00f2fe;
  --accent-blue: #0284c7;
  --accent-purple: #8b5cf6;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px rgba(0, 242, 254, 0.28);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  
  --container-max: 1240px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::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 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* ================= 动态背景与流光光晕 ================= */
#bg-canvas, #dynamic-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -3;
  overflow: hidden;
  pointer-events: none;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  animation: floatOrb 20s ease-in-out infinite alternate;
}

.glow-orb-1 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, rgba(216, 180, 254, 0.42) 0%, rgba(147, 51, 234, 0.2) 60%, transparent 100%);
  top: -120px;
  left: 5%;
}

.glow-orb-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.32) 0%, rgba(30, 27, 75, 0.5) 70%, transparent 100%);
  top: 40%;
  right: -100px;
  animation-duration: 25s;
  animation-delay: -5s;
}

.glow-orb-3 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(192, 132, 252, 0.38) 0%, rgba(3, 105, 161, 0.22) 60%, transparent 100%);
  bottom: -100px;
  left: 25%;
  animation-duration: 22s;
  animation-delay: -10s;
}

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

/* ================= 布局基础 ================= */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

section {
  padding: 85px 0;
  position: relative;
}

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

img, svg {
  display: block;
  max-width: 100%;
}

/* ================= 按钮体系 ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  white-space: nowrap;
  user-select: none;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #f3e8ff 0%, #d8b4fe 40%, #c084fc 70%, #a855f7 100%);
  color: #120326;
  font-weight: 700;
  box-shadow: 0 4px 22px rgba(192, 132, 252, 0.45);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #faf5ff 0%, #e9d5ff 40%, #d8b4fe 70%, #c084fc 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(216, 180, 254, 0.65);
  color: #070210;
}

.btn-secondary {
  background: rgba(15, 23, 42, 0.7);
  color: var(--text-main);
  border-color: var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(30, 41, 59, 0.85);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.06rem;
  border-radius: var(--radius-full);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-pulse {
  animation: pulseButton 3s infinite;
}

@keyframes pulseButton {
  0% { box-shadow: 0 0 0 0 rgba(216, 180, 254, 0.65); }
  70% { box-shadow: 0 0 0 14px rgba(192, 132, 252, 0); }
  100% { box-shadow: 0 0 0 0 rgba(192, 132, 252, 0); }
}

/* ================= 顶部导航栏 ================= */
.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(5, 11, 23, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(56, 189, 248, 0.12);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-img {
  height: 48px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
  border-radius: 2px;
}

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

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

/* ================= Hero 英雄视觉区 ================= */
.hero-section {
  padding-top: 60px;
  padding-bottom: 90px;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.28);
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.badge {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: #00f2fe;
  border-radius: 50%;
  box-shadow: 0 0 10px #00f2fe;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}

.gradient-text {
  background: linear-gradient(135deg, #f5f3ff 0%, #e9d5ff 25%, #d8b4fe 55%, #c084fc 80%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  filter: drop-shadow(0 0 25px rgba(216, 180, 254, 0.35));
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.22rem);
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 36px auto;
  line-height: 1.75;
}

.hero-subtitle strong {
  color: #e2e8f0;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 45px;
}

.hero-guarantee {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 50px;
}

.hero-guarantee span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--text-muted);
}

.hero-guarantee svg {
  color: var(--accent-green);
  width: 17px;
  height: 17px;
}

/* 仪表盘实测卡片 */
.hero-dashboard {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 30px;
  max-width: 960px;
  margin: 0 auto;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(14px);
  text-align: left;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.dashboard-status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.94rem;
  color: var(--text-muted);
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
  100% { transform: scale(1); opacity: 1; }
}

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

.metric-item {
  background: rgba(10, 18, 36, 0.6);
  border: 1px solid rgba(56, 189, 248, 0.12);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.metric-label {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.metric-val {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-main);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.metric-val.highlight {
  color: var(--primary);
  text-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
}

/* ================= 核心区块通用标题 ================= */
.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 55px auto;
}

.section-tag {
  display: inline-block;
  font-size: 0.84rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #d8b4fe;
  text-shadow: 0 0 12px rgba(192, 132, 252, 0.3);
  margin-bottom: 12px;
}

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

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

/* ================= 核心优势 (Features) ================= */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

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

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, #d8b4fe, transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(216, 180, 254, 0.45);
  background: var(--bg-card-hover);
  box-shadow: 0 15px 35px -10px rgba(192, 132, 252, 0.25);
}

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

.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(216, 180, 254, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: #d8b4fe;
  border: 1px solid rgba(216, 180, 254, 0.35);
  box-shadow: 0 0 16px rgba(192, 132, 252, 0.2);
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: rgba(216, 180, 254, 0.22);
  border-color: rgba(216, 180, 254, 0.6);
  color: #f5f3ff;
  box-shadow: 0 0 22px rgba(192, 132, 252, 0.45);
  transform: scale(1.05);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-text {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.68;
}

/* ================= 套餐价格 (Pricing) - 严格同排 ================= */
.pricing-section {
  position: relative;
  background: linear-gradient(180deg, transparent 0%, rgba(12, 23, 46, 0.5) 50%, transparent 100%);
}

.pricing-notice {
  text-align: center;
  margin-bottom: 30px;
  color: var(--accent-cyan);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

/* 核心：桌面端严格 4 列同排并排展示 */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  backdrop-filter: blur(14px);
}

.price-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-hover);
  box-shadow: 0 16px 40px -10px rgba(0, 242, 254, 0.3);
}

/* 爆款高亮卡片 */
.price-card.featured {
  background: linear-gradient(180deg, rgba(16, 36, 68, 0.9) 0%, rgba(10, 20, 42, 0.9) 100%);
  border: 2px solid var(--primary);
  box-shadow: 0 0 35px rgba(0, 242, 254, 0.28);
  transform: scale(1.02);
}

.price-card.featured:hover {
  transform: scale(1.04) translateY(-8px);
}

.featured-ribbon {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #00f2fe, #0088ff);
  color: #050b18;
  font-size: 0.76rem;
  font-weight: 800;
  padding: 4px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 242, 254, 0.4);
}

.plan-header {
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.plan-name-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
}

.plan-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  background: rgba(56, 189, 248, 0.15);
  color: var(--primary);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.plan-badge.highlight-badge {
  background: rgba(0, 242, 254, 0.25);
  color: #00f2fe;
}

.plan-desc {
  font-size: 0.84rem;
  color: var(--text-dim);
  min-height: 38px;
}

.plan-price-box {
  margin: 16px 0 10px 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.currency {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}

.price-num {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

.plan-annual-tip {
  font-size: 0.8rem;
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.1);
  padding: 3px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 4px;
}

.plan-specs {
  list-style: none;
  margin-bottom: 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plan-specs li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.plan-specs li svg {
  width: 17px;
  height: 17px;
  color: var(--primary);
  flex-shrink: 0;
}

.plan-specs li strong {
  color: var(--text-main);
}

/* ================= 节点测速状态 (Nodes) ================= */
.nodes-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.nodes-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}

.nodes-table th, .nodes-table td {
  padding: 16px 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nodes-table th {
  background: rgba(10, 20, 38, 0.8);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nodes-table td {
  font-size: 0.92rem;
  color: var(--text-muted);
}

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

.node-region {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--text-main);
}

.region-flag {
  font-size: 1.25rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.status-badge.online {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* ================= 推荐文章与内部跳转 (Articles) ================= */
.articles-section {
  background: rgba(8, 16, 32, 0.4);
}

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

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.article-card:hover {
  transform: translateY(-5px);
  border-color: rgba(216, 180, 254, 0.5);
  box-shadow: 0 12px 30px rgba(192, 132, 252, 0.25);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.article-category {
  color: #d8b4fe;
  font-weight: 700;
  text-shadow: 0 0 10px rgba(192, 132, 252, 0.35);
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: var(--text-main);
}

.article-card-title a:hover {
  color: #d8b4fe;
}

.article-card-snippet {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-readmore {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #d8b4fe;
  transition: var(--transition);
}

.article-readmore:hover {
  gap: 10px;
  color: #f3e8ff;
  text-shadow: 0 0 12px rgba(216, 180, 254, 0.7);
}

/* ================= 用户评价 (Testimonials) ================= */
.testimonials-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);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}

.stars {
  color: var(--accent-amber);
  margin-bottom: 14px;
  font-size: 0.95rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

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

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00f2fe, #3b82f6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #050b18;
  font-size: 1.1rem;
}

.user-meta h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.user-meta span {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ================= 常见问题 (FAQ) ================= */
.faq-wrap {
  max-width: 860px;
  margin: 0 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);
}

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

.faq-question {
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-question:hover {
  color: var(--primary);
}

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

.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;
  background: rgba(6, 12, 24, 0.4);
}

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

.faq-answer p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ================= 页脚 (Footer) ================= */
.site-footer {
  background: #030712;
  border-top: 1px solid rgba(56, 189, 248, 0.12);
  padding: 70px 0 30px 0;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: var(--text-muted);
  margin-top: 14px;
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
}

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

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

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
}

/* ================= 响应式调整 (Mobile & Tablet) ================= */
@media (max-width: 1080px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .dashboard-metrics {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .features-grid, .articles-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}