/* ========================================================
   巨浪云 (julangyun.sbs) 官方落地页 原生纯净 CSS
   超快秒开 / 零框架依赖 / 硬件加速渲染 / 响应式全适配
   ======================================================== */

:root {
  --bg-primary: #060913;
  --bg-secondary: #0c1322;
  --bg-card: rgba(16, 24, 40, 0.75);
  --bg-card-hover: rgba(22, 34, 58, 0.85);
  --border-color: rgba(56, 189, 248, 0.16);
  --border-hover: rgba(56, 189, 248, 0.45);
  
  --primary: #00f2fe;
  --primary-hover: #38bdf8;
  --accent-cyan: #00f2fe;
  --accent-blue: #2563eb;
  --accent-green: #10b981;
  --accent-purple: #8b5cf6;
  --accent-gold: #f59e0b;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px rgba(0, 242, 254, 0.25);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  
  --container-max: 1200px;
  --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;
}

/* 动态沙滩与大海背景画布 */
#bg-canvas {
  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;
  opacity: 0.35;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.28;
  animation: floatOrb 18s ease-in-out infinite alternate;
}

.glow-orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #00f2fe 0%, #2563eb 100%);
  top: -100px;
  left: 10%;
}

.glow-orb-2 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, #7928ca 0%, #ff0080 100%);
  top: 35%;
  right: -80px;
  animation-duration: 22s;
  animation-delay: -5s;
}

.glow-orb-3 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #06b6d4 0%, #3b82f6 100%);
  bottom: 5%;
  left: -120px;
  animation-duration: 25s;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.08); }
  100% { transform: translate(-30px, 60px) scale(0.95); }
}

/* 页面通用容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

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

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

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

/* 顶部导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 9, 19, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  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: 72px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 24px;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--text-main);
  background: rgba(56, 189, 248, 0.08);
}

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

/* 统一按钮体系 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #00f2fe 0%, #2563eb 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0, 242, 254, 0.55);
  color: #ffffff;
}

.btn-secondary {
  background: rgba(56, 189, 248, 0.1);
  color: var(--primary);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.btn-secondary:hover {
  background: rgba(56, 189, 248, 0.2);
  color: #ffffff;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.05rem;
  font-weight: 700;
}

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

.btn-pulse::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -60%;
  width: 40%;
  height: 200%;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.35) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: rotate(25deg);
  animation: shimmer 3.5s infinite;
}

@keyframes shimmer {
  0% { left: -60%; }
  25% { left: 140%; }
  100% { left: 140%; }
}

/* 徽章 Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.3);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.badge-pulse {
  position: relative;
}

.badge-pulse::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
}

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

.hero-pill {
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 22px;
  background: linear-gradient(135deg, #ffffff 30%, #a5f3fc 70%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 820px;
  margin: 0 auto 36px;
  font-weight: 400;
  line-height: 1.7;
}

.hero-subtitle strong {
  color: #38bdf8;
  font-weight: 600;
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
}

.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: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
  font-feature-settings: "tnum";
}

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

/* 核心特性区 Section Headers */
section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 50px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-top: 12px;
  margin-bottom: 16px;
  color: #ffffff;
}

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

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

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

.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: rgba(0, 242, 254, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.6rem;
  border: 1px solid rgba(0, 242, 254, 0.25);
}

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

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

/* 节点监控实时面板 */
.nodes-monitor-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-top: 20px;
  box-shadow: var(--shadow-card);
}

.nodes-table-wrap {
  width: 100%;
  overflow-x: auto;
}

.nodes-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.nodes-table th {
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nodes-table td {
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.nodes-table tr:hover td {
  background: rgba(56, 189, 248, 0.04);
}

.node-flag {
  font-size: 1.2rem;
  margin-right: 8px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

.status-badge.online {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.tag-stream {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(139, 92, 246, 0.15);
  color: #a78bfa;
  font-size: 0.75rem;
  margin-right: 4px;
}

/* ========================================================
   核心定价区 (PRICING SECTION)
   严格遵守用户要求：所有价格卡片在同排显示 (Same Row)
   ======================================================== */
.pricing-section {
  background: linear-gradient(180deg, rgba(8, 13, 26, 0) 0%, rgba(12, 19, 34, 0.8) 50%, rgba(8, 13, 26, 0) 100%);
  padding: 90px 0;
}

/* 4列横向同排价格容器 */
.pricing-grid-same-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: stretch; /* 保证所有卡片高度严格拉齐 */
  margin-top: 30px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.pricing-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-hover);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 242, 254, 0.2);
}

/* 热门推荐卡片高亮样式 */
.pricing-card.featured {
  background: linear-gradient(180deg, rgba(14, 28, 56, 0.95) 0%, rgba(10, 18, 38, 0.95) 100%);
  border: 2px solid var(--primary);
  box-shadow: 0 12px 35px rgba(0, 242, 254, 0.25);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 20px 45px rgba(0, 242, 254, 0.4);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #f59e0b, #ef4444);
  color: #ffffff;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
  white-space: nowrap;
}

.plan-header {
  margin-bottom: 20px;
  text-align: center;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 40px;
  line-height: 1.5;
}

.plan-price-box {
  text-align: center;
  padding: 16px 0;
  margin-bottom: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.price-currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  vertical-align: top;
  margin-right: 2px;
}

.price-num {
  font-size: 2.8rem;
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
  font-family: inherit;
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-left: 4px;
}

.plan-features {
  list-style: none;
  margin-bottom: 28px;
  flex-grow: 1; /* 撑满纵向空间，保持底部按钮水平对齐 */
}

.plan-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: #cbd5e1;
  margin-bottom: 12px;
  line-height: 1.5;
}

.feature-check {
  color: var(--accent-green);
  font-weight: 800;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.plan-action {
  margin-top: auto;
}

.plan-action .btn {
  width: 100%;
}

/* 优惠保障横幅 */
.guarantee-bar {
  display: flex;
  align-items: center;
  justify-content: space-around;
  margin-top: 40px;
  padding: 18px 24px;
  background: rgba(56, 189, 248, 0.05);
  border: 1px dashed rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-md);
  flex-wrap: wrap;
  gap: 16px;
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.guarantee-item strong {
  color: #ffffff;
}

/* 博客与文章知识库专区 (Articles Section) */
.articles-section {
  padding: 80px 0;
}

.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-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card);
  background: var(--bg-card-hover);
}

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

.article-tag {
  background: rgba(0, 242, 254, 0.1);
  color: var(--primary);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.article-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
}

.article-title a {
  color: #ffffff;
}

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

.article-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.85rem;
}

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

.read-more-link:hover {
  gap: 8px;
}

/* 用户真实评价 (Testimonials / Reviews) */
.reviews-section {
  padding: 80px 0;
  background: rgba(12, 19, 34, 0.4);
}

.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-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

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

.review-stars {
  color: #fbbf24;
  font-size: 1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-comment {
  font-size: 0.92rem;
  color: #cbd5e1;
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
  font-style: italic;
}

.review-user-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00f2fe, #2563eb);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #ffffff;
  font-size: 0.95rem;
  flex-shrink: 0;
}

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

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

.review-role {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.review-verified {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 0.75rem;
  color: #10b981;
  margin-left: 6px;
}

/* 常见问题解答 FAQ */
.faq-section {
  padding: 80px 0;
}

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

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

.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform 0.25s ease;
}

.faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.faq-content {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 8px;
  padding-top: 16px;
}

.faq-content strong {
  color: #e2e8f0;
}

/* 呼吁行动 CTA Banner (Bottom conversion block) */
.cta-banner-section {
  padding: 80px 0 100px;
}

.cta-banner-card {
  background: linear-gradient(135deg, rgba(14, 28, 56, 0.95) 0%, rgba(20, 36, 70, 0.95) 100%);
  border: 1px solid rgba(56, 189, 248, 0.4);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 35px rgba(0, 242, 254, 0.2);
}

.cta-banner-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.12) 0%, transparent 60%);
  pointer-events: none;
}

.cta-banner-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: #ffffff;
}

.cta-banner-desc {
  font-size: 1.1rem;
  color: #94a3b8;
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

/* 友情外链专区 (External Links) */
.external-links-section {
  padding: 40px 0 60px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.links-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  list-style: none;
}

.links-list a {
  font-size: 0.85rem;
  color: var(--text-muted);
  border-bottom: 1px dashed rgba(255, 255, 255, 0.15);
  padding-bottom: 2px;
}

.links-list a:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* 页脚 (Site Footer) */
.site-footer {
  background: #04060d;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 0 30px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.footer-brand-desc {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.7;
  margin-top: 14px;
  max-width: 320px;
}

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

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

.footer-links-col a {
  color: var(--text-muted);
  font-size: 0.88rem;
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.8rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 16px;
}

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

/* ========================================================
   响应式设计与媒体查询 (Responsive Breakpoints)
   ======================================================== */
@media (max-width: 1100px) {
  .pricing-grid-same-row {
    gap: 14px;
  }
  .pricing-card {
    padding: 24px 16px;
  }
  .plan-name {
    font-size: 1.18rem;
  }
  .price-num {
    font-size: 2.3rem;
  }
}

@media (max-width: 960px) {
  /* 当屏幕在平板中等宽度，允许横向滚动或者 2x2 排列，但仍优先保证一行滑动查看 */
  .pricing-grid-same-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .stat-item:nth-child(2) {
    border-right: none;
  }
}

@media (max-width: 768px) {
  .site-header {
    height: auto;
  }
  .header-inner {
    height: 64px;
  }
  .nav-menu {
    display: none; /* 移动端精简突出核心转化按钮 */
  }
  .hero-title {
    font-size: 2rem;
  }
  .pricing-grid-same-row {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 20px;
    -webkit-overflow-scrolling: touch;
  }
  .pricing-card {
    flex: 0 0 280px;
    scroll-snap-align: start;
  }
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
  }
  .stat-item {
    border-right: none;
    padding: 10px 0;
  }
  .guarantee-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}