/* ========================================
   沪小欣个人品牌博客 — 全局样式
   "魔登繁华"文艺风格
   ======================================== */

/* --- CSS 变量 --- */
:root {
  --mist-rose: rgb(172, 149, 196);
  --mist-green: rgb(220, 235, 222);
  --tea-gold: rgb(251, 184, 76);
  --rice-paper: #fdfaf5;
  --warm-white: #fefefb;
  --text-warm: #4a3f3a;
  --text-soft: rgb(104, 91, 84);
  --font-heading: 'Noto Serif SC', serif;
  --font-body: 'Noto Sans SC', sans-serif;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --max-width: 1200px;
  --nav-height: 72px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--text-warm);
  background-color: var(--rice-paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-warm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }

a { color: var(--mist-rose); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--tea-gold); }

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

ul { list-style: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- 导航栏 --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(254, 254, 251, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(172, 149, 196, 0.15);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--mist-rose) !important;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo i { font-size: 1.2rem; }

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}

.nav-links a {
  color: var(--text-soft);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--mist-rose);
  background: rgba(172, 149, 196, 0.08);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-warm);
  cursor: pointer;
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  border: 2px solid transparent;
  text-align: center;
}

.btn-primary {
  background: var(--mist-rose);
  color: #fff;
}
.btn-primary:hover {
  background: rgba(172, 149, 196, 0.85);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--mist-rose);
  border-color: var(--mist-rose);
}
.btn-outline:hover {
  background: var(--mist-rose);
  color: #fff;
  transform: translateY(-2px);
}

.btn-gold {
  background: var(--tea-gold);
  color: #fff;
}
.btn-gold:hover {
  background: rgba(251, 184, 76, 0.85);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-sm { padding: 8px 20px; font-size: 0.9rem; }
.btn-lg { padding: 16px 36px; font-size: 1.1rem; }

/* --- Hero --- */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  background: linear-gradient(180deg, rgba(172,149,196,0.06) 0%, var(--rice-paper) 100%);
}

.hero-avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--warm-white);
  box-shadow: var(--shadow-lg);
  margin: 0 auto 24px;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 8px;
  color: var(--text-warm);
}

.hero .slogan {
  font-size: 1.2rem;
  color: var(--text-soft);
  margin-bottom: 24px;
}

.hero-tags {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.tag {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(172, 149, 196, 0.1);
  color: var(--mist-rose);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- 分区标题 --- */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 2rem;
  margin-bottom: 8px;
}

.section-header p {
  color: var(--text-soft);
  font-size: 1.05rem;
}

.section-alt {
  background: var(--mist-green);
}

/* --- 卡片 --- */
.card {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.3s;
}

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

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: 24px;
}

.card-body h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.card-body p {
  color: var(--text-soft);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-soft);
}

.card-meta .category {
  background: rgba(172, 149, 196, 0.1);
  color: var(--mist-rose);
  padding: 2px 10px;
  border-radius: 50px;
}

/* --- 三列网格 --- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* --- 统计卡片 (Why Me) --- */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  padding: 36px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
}

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

.stat-card .stat-icon {
  font-size: 2.5rem;
  color: var(--mist-rose);
  margin-bottom: 12px;
}

.stat-card .stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--tea-gold);
  display: block;
}

.stat-card .stat-label {
  color: var(--text-soft);
  font-size: 1rem;
  margin-top: 4px;
}

/* --- CTA 区 --- */
.cta-section {
  background: linear-gradient(135deg, var(--mist-rose) 0%, rgba(172,149,196,0.7) 100%);
  padding: 80px 0;
  text-align: center;
  color: #fff;
}

.cta-section h2 {
  color: #fff;
  font-size: 2rem;
  margin-bottom: 12px;
}

.cta-section p {
  color: rgba(255,255,255,0.9);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

/* --- 页脚 --- */
.footer {
  background: var(--text-warm);
  color: rgba(255,255,255,0.8);
  padding: 60px 0 24px;
}

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

.footer h4 {
  color: #fff;
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.footer p, .footer a {
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
  line-height: 2;
}

.footer a:hover { color: var(--tea-gold); }

.footer-qr {
  width: 100px;
  height: 100px;
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 8px;
  margin-top: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

/* --- 面包屑 --- */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.breadcrumb a {
  color: var(--text-soft);
}

.breadcrumb a:hover {
  color: var(--mist-rose);
}

.breadcrumb span {
  margin: 0 8px;
  color: var(--text-soft);
}

/* --- 页面 Hero（内页） --- */
.page-hero {
  padding: 60px 0 40px;
  text-align: center;
  background: linear-gradient(180deg, rgba(172,149,196,0.06) 0%, var(--rice-paper) 100%);
}

.page-hero h1 {
  font-size: 2.5rem;
  margin-bottom: 8px;
}

.page-hero p {
  color: var(--text-soft);
  font-size: 1.05rem;
}

/* --- 关于页 --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-story p {
  margin-bottom: 20px;
  font-size: 1.05rem;
  line-height: 1.9;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 32px 0;
}

.about-stat {
  text-align: center;
  padding: 20px;
  background: var(--warm-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.about-stat .num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--tea-gold);
}

.about-stat .lbl {
  font-size: 0.9rem;
  color: var(--text-soft);
  margin-top: 4px;
}

.cert-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--warm-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.cert-item i {
  font-size: 1.5rem;
  color: var(--mist-rose);
}

/* --- 博客列表 --- */
.blog-filters {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 24px;
  border-radius: 50px;
  border: 2px solid rgba(172, 149, 196, 0.3);
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.3s;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--mist-rose);
  color: #fff;
  border-color: var(--mist-rose);
}

/* --- 博客详情 --- */
.article-header {
  text-align: center;
  padding: 40px 0 20px;
}

.article-header img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: 32px;
}

.article-header h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.article-meta {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 12px;
  color: var(--text-soft);
  font-size: 0.9rem;
}

.article-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 40px 24px;
}

.article-content h2 {
  font-size: 1.6rem;
  margin: 40px 0 16px;
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 32px 0 12px;
}

.article-content p {
  margin-bottom: 16px;
  font-size: 1.05rem;
  line-height: 1.9;
}

.article-content ul, .article-content ol {
  margin: 16px 0 16px 24px;
}

.article-content li {
  margin-bottom: 8px;
  font-size: 1.02rem;
  list-style: disc;
}

.article-content blockquote {
  border-left: 4px solid var(--mist-rose);
  padding: 16px 24px;
  margin: 24px 0;
  background: rgba(172, 149, 196, 0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-soft);
}

.article-content img {
  border-radius: var(--radius-md);
  margin: 24px auto;
}

.author-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: var(--warm-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  max-width: 780px;
  margin: 40px auto;
}

.author-card img {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
}

.author-card h4 {
  margin-bottom: 4px;
}

.author-card p {
  font-size: 0.9rem;
  color: var(--text-soft);
}

/* --- 路线卡片 --- */
.route-card {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}

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

.route-card-img {
  height: 220px;
  object-fit: cover;
}

.route-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.route-card-body h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.route-card-body .route-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 12px 0;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.route-card-body .route-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.route-price {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--tea-gold);
  font-weight: 700;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid rgba(0,0,0,0.06);
}

.route-price small {
  font-size: 0.85rem;
  color: var(--text-soft);
  font-weight: 400;
}

/* --- 画廊 --- */
.gallery-filters {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  grid-auto-flow: dense;
}

.gallery-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  transition: all 0.3s;
}

.gallery-item:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-lg);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}

.gallery-item.tall img {
  aspect-ratio: 3/4;
}

.gallery-item.wide img {
  aspect-ratio: 16/9;
}

/* --- Lightbox --- */
.lightbox {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.9);
  align-items: center;
  justify-content: center;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--radius-md);
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 32px;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  background: none;
  border: none;
}

.lightbox-prev, .lightbox-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
  background: rgba(255,255,255,0.1);
  border: none;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s;
}

.lightbox-prev:hover, .lightbox-next:hover {
  background: rgba(255,255,255,0.25);
}

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

/* --- 评价 --- */
.reviews-summary {
  text-align: center;
  padding: 40px;
  background: var(--warm-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 48px;
}

.reviews-summary .score {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  color: var(--tea-gold);
  font-weight: 700;
}

.reviews-summary .stars {
  font-size: 1.5rem;
  color: var(--tea-gold);
  margin: 8px 0;
}

.reviews-summary .count {
  color: var(--text-soft);
  font-size: 1rem;
}

.review-card {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}

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

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.review-stars {
  color: var(--tea-gold);
  font-size: 0.9rem;
}

.review-card .review-text {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text-warm);
}

.review-card .review-info h4 {
  margin-bottom: 2px;
  font-size: 1rem;
}

.review-card .review-info .date {
  font-size: 0.85rem;
  color: var(--text-soft);
}

/* --- 联系页 --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info-card {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.contact-info-item:last-child {
  border-bottom: none;
}

.contact-info-item i {
  font-size: 1.4rem;
  color: var(--mist-rose);
  width: 40px;
  text-align: center;
}

.contact-qr {
  width: 120px;
  height: 120px;
  background: var(--rice-paper);
  border-radius: var(--radius-sm);
  margin-top: 12px;
}

/* --- 表单 --- */
.form {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-warm);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid rgba(0,0,0,0.08);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-warm);
  background: var(--rice-paper);
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--mist-rose);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group .error-msg {
  color: #e74c3c;
  font-size: 0.85rem;
  margin-top: 4px;
  display: none;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
  border-color: #e74c3c;
}

.form-group.error .error-msg {
  display: block;
}

/* --- 提交成功页 --- */
.success-page {
  text-align: center;
  padding: 100px 0;
}

.success-icon {
  font-size: 5rem;
  color: var(--mist-green);
  margin-bottom: 24px;
}

.success-page h1 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.success-page p {
  color: var(--text-soft);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

/* --- 路线详情 --- */
.route-detail-header {
  text-align: center;
  padding: 40px 0 20px;
}

.route-detail-header img {
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  max-height: 400px;
  object-fit: cover;
  width: 100%;
}

.route-detail-header h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.route-detail-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 20px 24px 60px;
}

.route-detail-content h2 {
  margin: 32px 0 16px;
}

.route-detail-content ul {
  margin-left: 24px;
}

.route-detail-content li {
  margin-bottom: 8px;
  list-style: disc;
}

.route-highlight {
  background: linear-gradient(135deg, rgba(251,184,76,0.1), rgba(172,149,196,0.1));
  border-left: 4px solid var(--tea-gold);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  font-style: italic;
}

/* --- 相关推荐 --- */
.related-section {
  padding: 60px 0;
  background: var(--mist-green);
}

/* --- FAQ (Details/Summary) --- */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-list details {
  background: var(--warm-white);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-list summary {
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.05rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-list summary::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: var(--mist-rose);
  transition: transform 0.3s;
  font-size: 0.85rem;
}

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

.faq-list .faq-answer {
  padding: 0 24px 20px;
  color: var(--text-soft);
  line-height: 1.8;
}

/* --- 评价表单 --- */
.review-form {
  max-width: 600px;
  margin: 60px auto 0;
}

.review-form h3 {
  text-align: center;
  margin-bottom: 24px;
}

.star-rating {
  display: flex;
  gap: 4px;
  font-size: 1.5rem;
  cursor: pointer;
}

.star-rating i {
  color: #ddd;
  transition: color 0.2s;
}

.star-rating i.active,
.star-rating i:hover {
  color: var(--tea-gold);
}

/* --- 响应式 --- */

/* 1366px 及以下 */
@media (max-width: 1366px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; }
}

/* 768px 及以下 */
@media (max-width: 768px) {
  html { font-size: 15px; }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }

  .container { padding: 0 16px; }

  /* 移动端导航 */
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--warm-white);
    flex-direction: column;
    padding: 16px;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid rgba(0,0,0,0.05);
  }

  .nav-links.open { display: flex; }

  .nav-toggle { display: block; }

  /* 网格 */
  .grid-3, .grid-4, .stat-cards {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .cert-list {
    grid-template-columns: 1fr;
  }

  .hero h1 { font-size: 2.2rem; }
  .section { padding: 48px 0; }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

/* 375px 移动端 */
@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .hero h1 { font-size: 1.8rem; }
  .hero .slogan { font-size: 1rem; }

  .btn-lg { padding: 12px 24px; font-size: 1rem; }
}