/* ==========================================================================
   秒秒云官网 (MiaoMiaoCloud) - 玫瑰钛 × 珍珠白 × 樱晶粉 现代化高还原样式表
   基准宽度：1448px | 05 智能芯片电路唤醒动效 | 纯原生 CSS，保障毫秒级加载
   ========================================================================== */

:root {
  /* 官方唯一定稿色板 */
  --bg-main: #FFF9F8;
  --bg-card: #FFFFFF;
  --rose-titanium: #A35D73;
  --crystal-pink: #FFB7B6;
  --rose-strong: #C52A76;
  --rose-gradient: linear-gradient(115deg, #C52A76 0%, #EF7197 100%);
  --rose-btn-gradient: linear-gradient(110deg, #EA407F 0%, #C83878 100%);
  --title-gradient: linear-gradient(100deg, #BC2776 0%, #E75C84 55%, #E46083 100%);
  --text-main: #1F2937;
  --text-lead: #1F2937;
  --text-muted: #6B7280;
  --text-light: #9CA3AF;
  --border-color: #F4E5E9;
  --border-hover: #EDC3D0;
  --accent-pink: #D02673;
  --shadow-sm: 0 2px 6px rgba(163, 93, 115, 0.05);
  --shadow-md: 0 6px 16px rgba(163, 93, 115, 0.08);
  --shadow-lg: 0 12px 28px rgba(163, 93, 115, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --max-width: 1448px;
  --header-height: 80px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--bg-main);
  scroll-behavior: smooth;
}

/* 焦点可见性与跳过链接 */
:focus-visible {
  outline: 3px solid var(--rose-strong);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -60px;
  left: 16px;
  background: var(--rose-strong);
  color: #ffffff;
  padding: 12px 20px;
  z-index: 10000;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

/* 锚点滚动留白 */
[id] {
  scroll-margin-top: calc(var(--header-height) + 20px);
}

/* 通用容器宽度 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(20px, 3vw, 48px);
}

/* ==========================================================================
   顶部导航栏 (Header & Navigation) - 80px 高度，高还原定稿参考图
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(122, 42, 84, 0.03);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1470px;
  margin: 0 auto;
  padding: 0 clamp(22px, 3.3vw, 48px);
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #172033;
  font-size: 26px;
  font-weight: 850;
  letter-spacing: -1px;
  white-space: nowrap;
}

.brand-logo img {
  width: 43px;
  height: 43px;
  display: block;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2vw, 32px);
  list-style: none;
  margin-left: auto;
  white-space: nowrap;
}

.site-nav a {
  text-decoration: none;
  color: #30313a;
  font-size: 16px;
  font-weight: 650;
  transition: color 0.15s ease;
  padding: 8px 4px;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--accent-pink);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 24px;
  background: var(--rose-gradient) !important;
  color: #ffffff !important;
  font-size: 16px !important;
  font-weight: 700 !important;
  border-radius: 12px;
  text-decoration: none;
  box-shadow: 0 5px 14px rgba(209, 76, 126, 0.25);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(209, 76, 126, 0.35);
}

/* ==========================================================================
   Hero 主视觉区 (Hero Section) - 1448px 基准，芯片电路唤醒动效
   ========================================================================== */
.hero-section {
  position: relative;
  isolation: isolate;
  min-height: 840px;
  overflow: hidden;
  padding: 48px 22px 40px;
  text-align: center;
  background: linear-gradient(180deg, #fffaf9 0%, #fffafb 74%, #ffffff 100%);
}

/* ==========================================================================
   Hero 3D 芯片背景区与视频安装槽位 (保持静态高清图作为 poster 及默认降级显示，预留一体化动态视频)
   ========================================================================== */
.hero-art {
  pointer-events: none;
  position: absolute;
  z-index: -2;
  left: 50%;
  top: -80px;
  transform: translateX(-50%);
  width: max(100%, 1448px);
  height: 820px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  background: url('hero-background-clean.png') center top / 100% 100% no-repeat;
  opacity: 0.98;
}

.hero-bg-video {
  width: 100%;
  height: 100%;
  object-fit: fill;
  display: none;
  pointer-events: none;
}

.hero-bg-video.is-active {
  display: block;
}

/* 原图驱动的电路唤醒光效画布：与背景同尺寸同定位，仅在原图结构像素上发光 */
.hero-fx {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s ease;
}

.hero-fx.is-ready {
  opacity: 1;
}

.hero-bg-fallback {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;
}

/* Hero 文字与操作区 */
.hero-content {
  max-width: 1370px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border: 1px solid #F0CAD9;
  border-radius: 30px;
  color: #CC276E;
  background: linear-gradient(180deg, #FFFFFF 0%, #FFF4F8 100%);
  box-shadow: 0 3px 8px rgba(181, 65, 120, 0.12);
  font-size: 16px;
  font-weight: 650;
  margin-bottom: 24px;
}

.hero-badge-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: block;
}

.hero-title {
  font-size: clamp(28px, 2.85vw, 43px);
  line-height: 1.32;
  letter-spacing: -1.5px;
  margin: 12px auto 18px;
  font-weight: 860;
  color: #202531;
  white-space: nowrap;
}

.hero-title span {
  background: var(--title-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-size: clamp(17px, 1.53vw, 22px);
  font-weight: 750;
  line-height: 1.55;
  max-width: 1020px;
  margin: 0 auto 14px;
  color: var(--text-lead);
}

.hero-desc {
  font-size: clamp(15px, 1.3vw, 19px);
  color: #656774;
  line-height: 1.65;
  max-width: 960px;
  margin: 0 auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 215px;
  height: 58px;
  padding: 0 28px;
  border-radius: 15px;
  text-decoration: none;
  font-size: 19px;
  font-weight: 730;
  white-space: nowrap;
  transition: all 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  color: #ffffff !important;
  background: var(--rose-btn-gradient);
  box-shadow: 0 8px 16px rgba(210, 68, 119, 0.24);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(210, 68, 119, 0.35);
}

.btn-secondary {
  color: #30313B !important;
  border: 1px solid #EDC3D0;
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 4px 12px rgba(181, 77, 112, 0.12);
}

.btn-secondary:hover {
  background: #ffffff;
  border-color: #D2508A;
  color: #C52A76 !important;
  transform: translateY(-2px);
}

/* 4 项关键网络指标栏 (定稿图位置与设计：严格置于芯片下方，无重叠) */
.hero-metrics {
  max-width: 1110px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 315px auto 0;
  position: relative;
  z-index: 10;
}

.metric-item {
  position: relative;
  text-align: center;
}

.metric-item + .metric-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 8px;
  width: 1px;
  background: #DFC7D4;
}

.metric-val {
  display: block;
  color: #D14780;
  font-size: 37px;
  line-height: 1.18;
  font-weight: 870;
}

.metric-label {
  display: block;
  margin-top: 5px;
  font-size: 17px;
  color: #596070;
}

/* ==========================================================================
   衔接区域与通用 Section 样式
   ========================================================================== */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  font-size: 17px;
  color: #D2508A;
  font-weight: 750;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 39px;
  line-height: 1.3;
  margin: 12px 0 16px;
  font-weight: 800;
  color: var(--text-main);
}

.section-desc {
  font-size: 19px;
  color: #737986;
  max-width: 780px;
  margin: 0 auto;
}

/* 核心优势板块 */
.features-section {
  padding: 60px 0 90px;
  background: #FFFFFF;
}

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

.feature-card {
  background: #FFFDFC;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

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

.card-icon {
  width: 56px;
  height: 56px;
  background-color: #FFF1F5;
  border: 1px solid #F8D7E3;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 1.8rem;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 750;
  margin-bottom: 12px;
  color: var(--text-main);
}

.card-text {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

/* 全球应用生态 */
.support-section {
  padding: 80px 0;
  background-color: var(--bg-main);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.support-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.support-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.support-card-header .icon-wrap {
  width: 50px;
  height: 50px;
  background: #FFF1F5;
  border: 1px solid #F8D7E3;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.support-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.tag-item {
  background-color: #FFF9F8;
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
}

/* 套餐价格表 */
.pricing-section {
  padding: 80px 0;
  background: #FFFFFF;
}

.table-responsive {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: #FFFFFF;
  box-shadow: var(--shadow-sm);
  -webkit-overflow-scrolling: touch;
}

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

.pricing-table caption {
  caption-side: top;
  text-align: left;
  padding: 18px 24px;
  font-weight: 750;
  font-size: 1.15rem;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
  background: #FFFDFC;
}

.pricing-table th,
.pricing-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.pricing-table th {
  background-color: #FFF9F8;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
}

.pricing-table tr:last-child td {
  border-bottom: none;
}

.pricing-table tr:hover td {
  background-color: rgba(197, 42, 118, 0.02);
}

.plan-name {
  font-weight: 750;
  font-size: 1.05rem;
  color: var(--text-main);
}

.plan-badge {
  display: inline-block;
  background-color: #FFF1F5;
  color: #C52A76;
  border: 1px solid #F0CAD9;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  margin-left: 6px;
}

.plan-price {
  font-size: 1.3rem;
  font-weight: 850;
  color: #C52A76;
}

.plan-price span {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-light);
}

/* 用户评价 */
.reviews-section {
  padding: 80px 0;
  background: var(--bg-main);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

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

.review-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.review-stars {
  color: #E75C84;
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.review-content {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 42px;
  height: 42px;
  background: #FFF1F5;
  color: #C52A76;
  border: 1px solid #F8D7E3;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 750;
  font-size: 0.95rem;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 750;
  color: var(--text-main);
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* FAQ 常见问题 (原生 details/summary 默认展开) */
.faq-section {
  padding: 80px 0;
  background: #FFFFFF;
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #FFFDFC;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.faq-item summary {
  padding: 20px 24px;
  font-size: 1.1rem;
  font-weight: 750;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

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

.faq-item summary::after {
  content: "▾";
  font-size: 1.3rem;
  color: #C52A76;
  transition: transform 0.2s ease;
}

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

.faq-body {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
  border-top: 1px dashed var(--border-color);
  padding-top: 16px;
}

.faq-body a {
  color: #C52A76;
  text-decoration: underline;
  font-weight: 600;
}

/* 页脚 (严格仅保留 4 个标题，在新页面打开) */
.site-footer {
  background-color: #172033;
  color: #94A3B8;
  padding: 60px 0 30px;
  border-top: 1px solid #2A374F;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 40px;
  border-bottom: 1px solid #2A374F;
  margin-bottom: 30px;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand {
  font-size: 1.3rem;
  font-weight: 800;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand img {
  width: 32px;
  height: 32px;
}

.footer-nav {
  display: flex;
  gap: 32px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav a {
  color: #CBD5E1;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  transition: color 0.15s ease;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.footer-nav a:hover {
  color: #FFB7B6;
  text-decoration: underline;
}

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: #64748B;
}

/* ==========================================================================
   科普页、文章页与独立单页样式适配
   ========================================================================== */
.article-header {
  padding: 50px 0 30px;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
}

.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-light);
  margin-bottom: 16px;
  list-style: none;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: #C52A76;
  text-decoration: none;
}

.article-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--text-main);
}

.article-meta {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-light);
}

.article-body {
  max-width: 860px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.85;
  color: #1F2937;
}

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 800;
  margin: 38px 0 16px;
  color: var(--text-main);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 750;
  margin: 28px 0 12px;
  color: var(--text-main);
}

.article-body p {
  margin-bottom: 20px;
}

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

.article-body li {
  margin-bottom: 8px;
}

.article-body a {
  color: #C52A76;
  text-decoration: underline;
  font-weight: 600;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(242, 93, 157, 0.06) 0%, rgba(255, 183, 182, 0.1) 100%);
  border: 1px solid #F0CAD9;
  border-radius: var(--radius-md);
  padding: 36px;
  text-align: center;
  margin: 40px 0;
}

.article-cta-box h3 {
  font-size: 1.4rem;
  font-weight: 750;
  margin-bottom: 10px;
  color: var(--text-main);
}

.article-cta-box p {
  color: var(--text-muted);
  margin-bottom: 22px;
}

/* 科普列表网格 */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.article-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #D2508A;
}

.article-card h3 {
  font-size: 1.15rem;
  font-weight: 750;
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-card h3 a {
  color: var(--text-main);
  text-decoration: none;
}

.article-card h3 a:hover {
  color: #C52A76;
}

.article-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.article-card .read-more {
  color: #C52A76;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 独立单页 */
.page-container {
  max-width: 900px;
  margin: 40px auto 80px;
  background: #FFFFFF;
  padding: 48px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.page-container h1 {
  font-size: 2.2rem;
  font-weight: 850;
  margin-bottom: 24px;
  color: var(--text-main);
}

.page-container h2 {
  font-size: 1.45rem;
  font-weight: 750;
  margin: 32px 0 14px;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.page-container p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 18px;
}

.page-container ul {
  margin: 0 0 20px 24px;
  color: var(--text-muted);
}

.page-container li {
  margin-bottom: 8px;
}

.sitemap-group {
  margin-bottom: 32px;
}

.sitemap-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.sitemap-list li a {
  display: block;
  padding: 12px 16px;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.15s ease;
}

.sitemap-list li a:hover {
  background: #FFF1F5;
  border-color: #D2508A;
  color: #C52A76;
}

/* ==========================================================================
   响应式媒体查询 (@media) - 确保 1448px 还原及手机端 360/390/768 适配
   ========================================================================== */
@media (max-width: 1100px) {
  .hero-title {
    white-space: normal;
    max-width: 1000px;
  }
  .site-nav ul {
    gap: 14px;
  }
  .site-nav a {
    font-size: 14px;
  }
  .brand-logo {
    font-size: 20px;
  }
  .hero-art {
    background-size: 100% 100%;
    background-position: center top;
  }
  .hero-section {
    min-height: 840px;
  }
  .hero-metrics {
    margin-top: 315px;
    position: relative;
    z-index: 10;
  }
  .features-grid,
  .reviews-grid,
  .knowledge-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 68px;
  }

  .site-header {
    height: 68px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .brand-logo {
    font-size: 19px;
    letter-spacing: -0.5px;
  }

  .brand-logo img {
    width: 36px;
    height: 36px;
  }

  .site-nav ul {
    gap: 8px;
  }

  .site-nav a:not(.nav-cta) {
    display: none;
  }

  .nav-cta {
    font-size: 13px !important;
    padding: 9px 15px;
  }

  .hero-section {
    padding: 32px 16px 20px;
    min-height: 720px;
  }

  .hero-art {
    top: 180px;
    opacity: 0.8;
    width: 1120px;
    height: 635px;
    background-size: 100% 100%;
  }

  .hero-badge {
    font-size: 13px;
    padding: 7px 14px;
    gap: 6px;
  }

  .hero-badge-icon {
    width: 18px;
    height: 18px;
  }

  .hero-title {
    font-size: 26px;
    letter-spacing: -0.6px;
    margin: 20px auto 14px;
    white-space: normal;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-desc {
    font-size: 14px;
    line-height: 1.6;
  }

  .hero-actions {
    gap: 12px;
    margin-top: 26px;
    width: 100%;
  }

  .btn {
    min-width: 0;
    flex: 1;
    height: 48px;
    font-size: 14px;
    padding: 0 12px;
    border-radius: 10px;
  }

  .hero-metrics {
    margin-top: 310px;
    grid-template-columns: repeat(2, 1fr);
    row-gap: 22px;
    position: relative;
    z-index: 10;
  }

  .metric-item + .metric-item::before {
    display: none;
  }

  .metric-val {
    font-size: 26px;
  }

  .metric-label {
    font-size: 13px;
  }

  .section-title {
    font-size: 27px;
  }

  .section-desc {
    font-size: 15px;
  }

  .features-grid,
  .support-grid,
  .reviews-grid,
  .knowledge-grid,
  .sitemap-list {
    grid-template-columns: 1fr;
  }

  .page-container {
    padding: 24px 16px;
  }

  .footer-top {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .footer-nav {
    justify-content: center;
    gap: 20px;
  }
}

@media (max-width: 390px) {
  .hero-title {
    font-size: 23px;
  }

  .metric-val {
    font-size: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  .hero-bg-video {
    display: none !important;
  }
}