/* ==========================================================================
   51吃瓜网站 - 全局样式表
   主题：深色底 + 高亮强调色（绯红/琥珀），匹配吃瓜爆料风格
   ========================================================================== */

:root {
  --bg-dark: #12101c;
  --bg-deep: #1a1726;
  --bg-card: #221d33;
  --bg-card-hover: #2a2440;
  --accent: #ff5a6e;
  --accent-2: #ffb020;
  --accent-gradient: linear-gradient(135deg, #ff5a6e 0%, #ffb020 100%);
  --text-main: #f4f1fa;
  --text-sub: #b9b3cc;
  --text-muted: #8a83a0;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --max-width: 1200px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(18, 16, 28, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: 1px;
  white-space: nowrap;
}

.brand .brand-badge {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: pulse-glow 2.4s ease-in-out infinite;
}

.brand .brand-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  display: block;
  line-height: 1;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-menu li a {
  display: block;
  padding: 10px 16px;
  border-radius: 10px;
  color: var(--text-sub);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-menu li a:hover,
.nav-menu li a.active {
  color: #fff;
  background: rgba(255, 90, 110, 0.14);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-main);
  width: 44px;
  height: 44px;
  border-radius: 10px;
  font-size: 1.3rem;
  cursor: pointer;
}

/* ---------- 通用区块 ---------- */
.section {
  padding: 72px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 44px;
}

.section-eyebrow {
  display: inline-block;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-title {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 auto;
}

/* ---------- Hero ---------- */
#hero {
  position: relative;
  padding: 96px 0 88px;
  background: radial-gradient(ellipse at 20% 20%, rgba(255, 90, 110, 0.22), transparent 45%),
              radial-gradient(ellipse at 80% 80%, rgba(255, 176, 32, 0.16), transparent 45%),
              var(--bg-deep);
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 90, 110, 0.14);
  border: 1px solid rgba(255, 90, 110, 0.35);
  color: var(--accent);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2.9rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 18px;
}

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

.hero-sub {
  color: var(--text-sub);
  font-size: 1.05rem;
  max-width: 540px;
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 0.98rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #1a0f14;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(255, 90, 110, 0.4);
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
}

.hero-visual {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr 1fr;
}

.hero-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  animation: float-y 5s ease-in-out infinite;
}

.hero-card:nth-child(2) {
  animation-delay: 1.2s;
}

.hero-card img {
  width: 100%;
  height: 150px;
  object-fit: cover;
}

.hero-card-body {
  padding: 12px 14px;
}

.hero-card-body .tag {
  display: inline-block;
  background: rgba(255, 90, 110, 0.16);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 6px;
}

.hero-card-body h3 {
  font-size: 0.95rem;
  font-weight: 700;
}

/* ---------- 卡片网格 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.news-card .thumb {
  position: relative;
  overflow: hidden;
}

.news-card .thumb img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.news-card:hover .thumb img {
  transform: scale(1.06);
}

.news-card .badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--accent-gradient);
  color: #1a0f14;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: 999px;
}

.news-card .body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-card .meta {
  display: flex;
  gap: 14px;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 10px;
}

.news-card h3 {
  font-size: 1.08rem;
  font-weight: 800;
  margin-bottom: 10px;
  line-height: 1.5;
}

.news-card h3 a:hover {
  color: var(--accent);
}

.news-card p {
  color: var(--text-sub);
  font-size: 0.9rem;
  margin-bottom: 16px;
  flex: 1;
}

.news-card .more {
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 700;
}

.news-card .more:hover {
  color: var(--accent-2);
}

/* ---------- 特性/服务 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-item::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 4px;
  width: 0;
  background: var(--accent-gradient);
  transition: width 0.4s ease;
}

.feature-item:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
}

.feature-item:hover::after {
  width: 100%;
}

.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  background: rgba(255, 90, 110, 0.12);
  margin-bottom: 16px;
}

.feature-item h3 {
  font-size: 1.12rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.feature-item p {
  color: var(--text-sub);
  font-size: 0.92rem;
}

/* ---------- 列表页样式 ---------- */
.page-banner {
  padding: 70px 0 40px;
  background: radial-gradient(ellipse at 30% 10%, rgba(255, 90, 110, 0.18), transparent 50%), var(--bg-deep);
  text-align: center;
}

.page-banner h1 {
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 10px;
}

.page-banner p {
  color: var(--text-sub);
}

.layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.filter-btn {
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-sub);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.filter-btn.active,
.filter-btn:hover {
  background: var(--accent-gradient);
  color: #1a0f14;
  border-color: transparent;
}

.sidebar {
  position: sticky;
  top: 88px;
  display: grid;
  gap: 24px;
}

.side-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

.side-card h3 {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.side-card h3::before {
  content: '';
  width: 4px;
  height: 18px;
  background: var(--accent-gradient);
  border-radius: 4px;
}

.rank-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
}

.rank-list li:last-child {
  border-bottom: none;
}

.rank-num {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--bg-deep);
  color: var(--text-sub);
  font-size: 0.8rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.rank-list li:nth-child(-n+3) .rank-num {
  background: var(--accent-gradient);
  color: #1a0f14;
}

.rank-list a {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.5;
}

.rank-list a:hover {
  color: var(--accent);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-cloud a {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  color: var(--text-sub);
  font-size: 0.8rem;
  padding: 5px 12px;
  border-radius: 999px;
}

.tag-cloud a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}

.page-link {
  min-width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-sub);
  font-weight: 700;
}

.page-link.active,
.page-link:hover {
  background: var(--accent-gradient);
  color: #1a0f14;
  border-color: transparent;
}

/* ---------- 详情页 ---------- */
.article-wrap {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

.article {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}

.article-header h1 {
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.4;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.86rem;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.article-meta .author {
  color: var(--accent);
  font-weight: 700;
}

.article-cover {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
}

.article-cover img {
  width: 100%;
  max-height: 460px;
  object-fit: cover;
}

.article-body p {
  color: var(--text-sub);
  margin-bottom: 20px;
  font-size: 1.02rem;
}

.article-body h2 {
  font-size: 1.4rem;
  font-weight: 800;
  margin: 28px 0 14px;
}

.article-body blockquote {
  border-left: 4px solid var(--accent);
  background: var(--bg-deep);
  padding: 16px 20px;
  border-radius: 0 10px 10px 0;
  color: var(--text-main);
  margin: 20px 0;
  font-style: italic;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.related-item {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.related-item:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.related-item img {
  width: 100%;
  height: 130px;
  object-fit: cover;
}

.related-item .info {
  padding: 14px;
}

.related-item .info h4 {
  font-size: 0.94rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.related-item .info h4 a:hover {
  color: var(--accent);
}

.related-item .info span {
  color: var(--text-muted);
  font-size: 0.78rem;
}

/* ---------- 产品页 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

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

.product-card .p-img {
  overflow: hidden;
}

.product-card .p-img img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .p-img img {
  transform: scale(1.06);
}

.product-card .p-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-card .p-body h3 {
  font-size: 1.14rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.product-card .p-body p {
  color: var(--text-sub);
  font-size: 0.9rem;
  margin-bottom: 16px;
  flex: 1;
}

.price {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.price .amount {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent);
}

.price .origin {
  color: var(--text-muted);
  text-decoration: line-through;
  font-size: 0.88rem;
}

.price .tag-ribbon {
  background: rgba(255, 176, 32, 0.16);
  color: var(--accent-2);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 999px;
}

.btn-block {
  width: 100%;
}

/* ---------- 关于页 ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.stat-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  padding: 30px 20px;
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.stat-item .num {
  font-size: 2.4rem;
  font-weight: 900;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-item .label {
  color: var(--text-sub);
  margin-top: 6px;
  font-size: 0.92rem;
}

.timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding-left: 28px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  padding: 0 0 32px 20px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(255, 90, 110, 0.2);
}

.timeline-item .time {
  color: var(--accent);
  font-weight: 800;
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.timeline-item h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.timeline-item p {
  color: var(--text-sub);
  font-size: 0.92rem;
}

/* ---------- 联系页 ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 90, 110, 0.15);
}

textarea.form-control {
  min-height: 140px;
  resize: vertical;
}

.contact-cards {
  display: grid;
  gap: 18px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: var(--transition);
}

.contact-card:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

.contact-card .icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(255, 90, 110, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-card h3 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.contact-card p {
  color: var(--text-sub);
  font-size: 0.88rem;
}

.map-placeholder {
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--text-muted);
  margin-top: 40px;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 700;
  padding: 18px 22px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: inherit;
}

.faq-q::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent);
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.open .faq-q::after {
  transform: rotate(45deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-a p {
  padding: 0 22px 20px;
  color: var(--text-sub);
  font-size: 0.92rem;
}

/* ---------- CTA ---------- */
#cta {
  background: radial-gradient(ellipse at 50% 0%, rgba(255, 90, 110, 0.24), transparent 60%), var(--bg-deep);
  text-align: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.cta-title {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 12px;
}

.cta-desc {
  color: var(--text-sub);
  max-width: 560px;
  margin: 0 auto 30px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: #0e0c17;
  border-top: 1px solid var(--border);
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  font-size: 1.3rem;
  font-weight: 900;
  margin-bottom: 14px;
}

.footer-brand .brand-badge {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.footer-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 360px;
}

.footer-col h3 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-sub);
  font-size: 0.9rem;
}

.footer-col ul li a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.84rem;
}

/* ---------- 动画 ---------- */
@keyframes pulse-glow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.3rem;
  }
  .layout,
  .article-wrap,
  .contact-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }
  .section-title {
    font-size: 1.6rem;
  }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .nav-menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-deep);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px;
    gap: 6px;
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    border-bottom: 1px solid var(--border);
    z-index: 999;
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
  }
  .nav-menu li a {
    padding: 13px 16px;
  }
  .hero-visual {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .article {
    padding: 22px;
  }
  .article-header h1 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.9rem;
  }
  .btn {
    width: 100%;
  }
  .card-grid,
  .product-grid {
    grid-template-columns: 1fr;
  }
  .contact-layout {
    grid-template-columns: 1fr;
  }
}