/* ===== 高端简约钢琴品牌官网 ===== */
:root {
  --color-bg: #faf8f5;
  --color-bg-alt: #f3efe8;
  --color-dark: #2c2420;
  --color-dark-soft: #3d342e;
  --color-gold: #b89b6e;
  --color-gold-light: #d4c09a;
  --color-text: #2c2420;
  --color-text-soft: #6b5e54;
  --color-text-muted: #9a8e84;
  --color-border: #e8e2d9;
  --font-serif: 'Noto Serif SC', 'Playfair Display', 'Songti SC', Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --max-width: 1100px;
  --section-padding: 100px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  line-height: 1.8;
  background: var(--color-bg);
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* ===== 导航 ===== */
.navbar {
  background: rgba(44, 36, 32, 0.95);
  backdrop-filter: blur(10px);
  color: #fff;
  padding: 0 48px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.navbar .logo {
  font-family: 'Microsoft YaHei', '微软雅黑', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 2px;
  display: flex;
  align-items: center;
  gap: 6px;
  line-height: 1;
  white-space: nowrap;
  flex-shrink: 0;
}
.navbar .logo span { color: var(--color-gold); font-size: 22px; }
.navbar .logo-text {
  display: inline-block;
  line-height: 1;
  color: #fff !important;
}
/* 中文页面文字微调：微软雅黑中文字视觉中心偏下，上移2px与logo对齐；字号略小 */
html[lang="zh-CN"] .navbar .logo-text {
  transform: translateY(-2px);
  font-size: 18px;
}
.navbar .logo-img {
  height: 48px !important;
  width: auto !important;
  max-width: 240px;
  object-fit: contain;
  display: block;
}
.navbar nav { display: flex; gap: 36px; align-items: center; }
.navbar nav a {
  font-family: 'Microsoft YaHei', '微软雅黑', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.3s;
  position: relative;
  letter-spacing: 1px;
  opacity: 0.9;
}
.navbar nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width 0.3s;
}
.navbar nav a:hover, .navbar nav a.active {
  color: var(--color-gold);
  opacity: 1;
}
.navbar nav a:hover::after, .navbar nav a.active::after { width: 100%; }
.navbar nav a.lang-switch {
  padding: 6px 16px;
  border: 1px solid rgba(184,155,110,0.4);
  border-radius: 2px;
  color: var(--color-gold);
  font-size: 12px;
  letter-spacing: 1px;
}
.navbar nav a.lang-switch::after { display: none; }
.navbar nav a.lang-switch:hover { background: var(--color-gold); color: var(--color-dark); }

/* 汉堡按钮 */
.nav-hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; z-index: 101; }
.nav-hamburger span { display: block; width: 22px; height: 1.5px; background: #fff; margin: 6px 0; transition: all 0.3s; }
.nav-hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px; left: 0; right: 0;
  background: var(--color-dark);
  z-index: 99;
  padding: 12px 0;
  flex-direction: column;
}
.mobile-menu.active { display: flex; }
.mobile-menu a {
  display: block;
  padding: 14px 32px;
  color: rgba(255,255,255,0.8);
  font-size: 15px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  letter-spacing: 1px;
}
.mobile-menu a.active, .mobile-menu a:hover { color: var(--color-gold); }
.mobile-menu a.lang-switch {
  display: inline-block;
  margin: 12px 32px;
  padding: 8px 16px;
  border: 1px solid var(--color-gold);
  border-radius: 2px;
  color: var(--color-gold);
  font-size: 13px;
  width: auto;
}

/* ===== Hero ===== */
.hero {
  height: 85vh;
  min-height: 560px;
  background: linear-gradient(135deg, #1a1512 0%, #2c2420 50%, #1a1512 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 60%, rgba(184,155,110,0.08) 0%, transparent 60%);
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--color-bg), transparent);
}
.hero-content {
  position: relative;
  z-index: 1;
  padding: 0 24px;
  max-width: 800px;
}
.hero-content::before {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--color-gold);
  margin: 0 auto 32px;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: 52px;
  font-weight: 300;
  margin-bottom: 24px;
  letter-spacing: 6px;
  line-height: 1.4;
}
.hero h1 span {
  color: var(--color-gold);
  font-weight: 400;
  display: block;
  margin-top: 8px;
  font-size: 42px;
}
.hero p {
  font-size: 15px;
  opacity: 0.6;
  margin-bottom: 44px;
  letter-spacing: 3px;
  font-weight: 300;
}
.hero .btn {
  display: inline-block;
  padding: 14px 44px;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-size: 13px;
  letter-spacing: 3px;
  transition: all 0.4s;
  background: transparent;
  border-radius: 0;
}
.hero .btn:hover {
  background: var(--color-gold);
  color: var(--color-dark);
  letter-spacing: 4px;
}
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  cursor: pointer;
  width: 22px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 11px;
  display: flex;
  justify-content: center;
  padding-top: 7px;
}
.hero-scroll span {
  display: block;
  width: 3px;
  height: 6px;
  background: rgba(255,255,255,0.5);
  border-radius: 2px;
  animation: scrollDown 2s infinite;
}
@keyframes scrollDown {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(10px); }
}

/* ===== 通用区块 ===== */
.section {
  padding: var(--section-padding) 40px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.section-title {
  text-align: center;
  margin-bottom: 64px;
}
.section-title h2 {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 400;
  margin-bottom: 16px;
  letter-spacing: 2px;
}
.section-title .line {
  width: 36px;
  height: 1px;
  background: var(--color-gold);
  margin: 0 auto;
}

/* ===== 品牌简介 ===== */
.brand-section { padding: var(--section-padding) 40px; }
.brand-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
}
.brand-text .section-title { text-align: left; margin-bottom: 28px; }
.brand-text .section-title .line { margin: 0; }
.brand-subtitle {
  color: var(--color-gold);
  font-size: 14px;
  letter-spacing: 3px;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.brand-desc {
  color: var(--color-text-soft);
  line-height: 2;
  margin-bottom: 32px;
  font-size: 14px;
}
.btn-outline {
  display: inline-block;
  padding: 12px 36px;
  border: 1px solid var(--color-dark);
  color: var(--color-dark);
  font-size: 12px;
  letter-spacing: 2px;
  transition: all 0.3s;
  background: transparent;
}
.btn-outline:hover {
  background: var(--color-dark);
  color: #fff;
}
.brand-image-placeholder {
  width: 100%;
  height: 400px;
  background: linear-gradient(145deg, #f0ebe2 0%, #e5ddd0 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}
.brand-image-placeholder::before {
  content: '';
  position: absolute;
  top: 20px; left: 20px; right: -20px; bottom: -20px;
  border: 1px solid var(--color-gold);
  opacity: 0.3;
  z-index: -1;
}
.brand-image-placeholder span { font-size: 72px; opacity: 0.4; }
.brand-image-placeholder p { margin-top: 16px; color: var(--color-text-muted); font-size: 13px; letter-spacing: 1px; }

/* ===== 核心数据 ===== */
.stats-section {
  background: transparent;
  padding: 72px 40px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.data-stats-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  text-align: center;
}
.stat-item {
  padding: 0 20px;
  border-right: 1px solid var(--color-border);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-family: var(--font-serif);
  font-size: 44px;
  font-weight: 300;
  color: var(--color-dark);
  line-height: 1;
  margin-bottom: 12px;
}
.stat-num span { font-size: 22px; color: var(--color-gold); }
.stat-label {
  color: var(--color-text-muted);
  font-size: 13px;
  letter-spacing: 2px;
}

/* ===== 产品卡片 ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 48px 32px;
}
.product-card {
  background: transparent;
  transition: all 0.4s;
}
.product-card:hover { transform: translateY(-6px); }
.product-card .image {
  height: 280px;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 56px;
  color: var(--color-text-muted);
  overflow: hidden;
  position: relative;
  margin-bottom: 20px;
}
.product-card .image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.product-card:hover .image img { transform: scale(1.04); }
.product-card .info { padding: 0 4px; }
.product-card .model {
  color: var(--color-gold);
  font-size: 12px;
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.product-card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 400;
  margin-bottom: 10px;
}
.product-card p {
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.product-card .more {
  display: inline-block;
  margin-top: 16px;
  color: var(--color-dark);
  font-size: 12px;
  letter-spacing: 2px;
  border-bottom: 1px solid var(--color-gold);
  padding-bottom: 2px;
  transition: all 0.3s;
}
.product-card .more:hover { color: var(--color-gold); }

/* ===== 产品详情 ===== */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  padding: 64px 40px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.image-gallery { position: sticky; top: 100px; }
.main-image {
  width: 100%;
  height: 440px;
  background: var(--color-bg-alt);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 100px;
  color: var(--color-text-muted);
}
.main-image img { width: 100%; height: 100%; object-fit: cover; }
.thumbnails { display: flex; gap: 10px; margin-top: 14px; }
.thumb {
  width: 72px; height: 72px;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.3s;
  opacity: 0.5;
}
.thumb:hover { opacity: 1; }
.thumb.active { border-color: var(--color-gold); opacity: 1; }
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.product-detail .info .model {
  color: var(--color-gold);
  font-size: 14px;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.product-detail .info h1 {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 400;
  margin-bottom: 8px;
}
.product-detail .info .intro {
  color: var(--color-text-soft);
  margin-bottom: 32px;
  line-height: 2;
  font-size: 14px;
}
.product-detail .specs {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
}
.product-detail .specs h3 {
  font-family: var(--font-serif);
  margin-bottom: 16px;
  font-size: 16px;
  font-weight: 500;
}
.product-detail .specs table { width: 100%; }
.product-detail .specs td {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
}
.product-detail .specs td:first-child { color: var(--color-text-muted); width: 40%; }

/* 产品详情宣传图 */
.product-detail-images {
  max-width: 750px;
  margin: 60px auto;
  padding: 0 24px;
}
.product-detail-images h2 {
  font-family: var(--font-serif);
  text-align: center;
  margin-bottom: 32px;
  color: var(--color-text);
  font-weight: 400;
  font-size: 22px;
  letter-spacing: 2px;
}
.product-detail-images img {
  width: 100%;
  max-width: 750px;
  height: auto;
  display: block;
  margin: 0 auto 4px;
}

/* ===== 防伪查询 ===== */
.verify-section {
  max-width: 560px;
  margin: 80px auto;
  padding: 0 40px;
  text-align: center;
}
.verify-section h1 {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.verify-section .desc {
  color: var(--color-text-soft);
  margin-bottom: 40px;
  font-size: 14px;
}
.verify-form { display: flex; gap: 0; margin-bottom: 32px; }
.verify-form input {
  flex: 1;
  padding: 14px 18px;
  border: 1px solid var(--color-border);
  border-right: none;
  font-size: 14px;
  outline: none;
  transition: border-color 0.3s;
  background: #fff;
  font-family: var(--font-sans);
}
.verify-form input:focus { border-color: var(--color-gold); }
.verify-form button {
  padding: 14px 28px;
  background: var(--color-dark);
  color: #fff;
  border: none;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.3s;
  letter-spacing: 1px;
}
.verify-form button:hover { background: var(--color-gold); }
.verify-result { padding: 24px; text-align: left; margin-top: 24px; }
.verify-result.success { background: #f6f4ef; border-left: 3px solid var(--color-gold); }
.verify-result.fail { background: #faf0f0; border-left: 3px solid #c0392b; }
.verify-result h3 {
  font-family: var(--font-serif);
  margin-bottom: 12px;
  font-weight: 500;
  font-size: 18px;
}
.verify-result .detail { margin-top: 12px; }
.verify-result .detail p { margin: 6px 0; font-size: 13px; color: var(--color-text-soft); }
.verify-result .detail strong { color: var(--color-text); font-weight: 500; margin-right: 8px; }

/* ===== 关于我们 ===== */
.about-section { max-width: 800px; margin: 0 auto; padding: 72px 40px; }
.about-section h1 {
  font-family: var(--font-serif);
  font-size: 28px;
  margin-bottom: 32px;
  text-align: center;
  font-weight: 400;
}
.about-section p {
  color: var(--color-text-soft);
  margin-bottom: 20px;
  line-height: 2.2;
  font-size: 14px;
}
.about-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.about-feature {
  text-align: center;
  padding: 36px 20px;
  background: #fff;
  border: 1px solid var(--color-border);
}
.about-feature .icon { font-size: 36px; margin-bottom: 16px; }
.about-feature h3 {
  font-family: var(--font-serif);
  margin-bottom: 10px;
  font-size: 16px;
  font-weight: 500;
}
.about-feature p { color: var(--color-text-muted); font-size: 13px; line-height: 1.7; }

/* ===== 防伪CTA ===== */
.verify-cta {
  background: transparent;
  padding: 90px 40px;
  text-align: center;
  color: var(--color-text);
  position: relative;
  overflow: hidden;
}
.verify-cta::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 500px; height: 500px;
  border: 1px solid rgba(184,155,110,0.12);
  border-radius: 50%;
}
.verify-cta-content { position: relative; z-index: 1; max-width: 600px; margin: 0 auto; }
.verify-cta-content::before {
  content: '';
  display: block;
  width: 36px;
  height: 1px;
  background: var(--color-gold);
  margin: 0 auto 28px;
}
.verify-cta h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  margin-bottom: 16px;
  letter-spacing: 2px;
  color: var(--color-dark);
}
.verify-cta p { color: var(--color-text-soft); margin-bottom: 36px; font-size: 14px; line-height: 1.8; }
.btn-gold {
  display: inline-block;
  padding: 14px 40px;
  background: var(--color-gold);
  color: var(--color-dark);
  font-size: 12px;
  letter-spacing: 3px;
  transition: all 0.3s;
  border: 1px solid var(--color-gold);
}
.btn-gold:hover {
  background: transparent;
  color: var(--color-gold);
  letter-spacing: 4px;
}

/* ===== 客户好评 ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.review-card {
  background: #fff;
  padding: 32px 28px;
  border: 1px solid var(--color-border);
  transition: all 0.4s;
  position: relative;
}
.review-card::before {
  content: '"';
  position: absolute;
  top: 12px;
  left: 24px;
  font-family: var(--font-serif);
  font-size: 60px;
  color: var(--color-gold);
  opacity: 0.2;
  line-height: 1;
}
.review-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(44,36,32,0.08); }
.review-stars { color: var(--color-gold); font-size: 14px; margin-bottom: 16px; letter-spacing: 3px; }
.review-text {
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.9;
  margin-bottom: 24px;
  min-height: 75px;
  padding-top: 8px;
}
.review-author { display: flex; align-items: center; gap: 12px; padding-top: 16px; border-top: 1px solid var(--color-border); }
.review-author .avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  color: var(--color-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 16px;
  font-family: var(--font-serif);
}
.review-author .name { font-weight: 500; font-size: 13px; }
.review-author .location { color: var(--color-text-muted); font-size: 11px; margin-top: 2px; letter-spacing: 1px; }

/* ===== 联系邮箱卡片 ===== */
.contact-email-card {
  background: #fff;
  border: 1px solid var(--color-border);
  padding: 48px 32px;
  text-align: center;
  transition: all 0.3s;
}
.contact-email-card:hover { border-color: var(--color-gold); }
.contact-email-icon { font-size: 40px; margin-bottom: 16px; }
.contact-email-label {
  color: var(--color-text-muted);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.contact-email-address {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--color-dark);
  border-bottom: 1px solid var(--color-gold);
  padding-bottom: 4px;
  transition: color 0.3s;
}
.contact-email-address:hover { color: var(--color-gold); }

/* ===== 底部CTA ===== */
.bottom-cta {
  background: var(--color-bg-alt);
  padding: 80px 40px;
  text-align: center;
}
.bottom-cta-content { max-width: 560px; margin: 0 auto; }
.bottom-cta-content::before {
  content: '';
  display: block;
  width: 36px;
  height: 1px;
  background: var(--color-gold);
  margin: 0 auto 28px;
}
.bottom-cta h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 400;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.bottom-cta p { font-size: 14px; color: var(--color-text-soft); margin-bottom: 32px; }

/* ===== 页脚 ===== */
.footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.5);
  padding: 56px 40px 24px;
}
.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer h4 {
  color: #fff;
  margin-bottom: 18px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1px;
}
.footer p, .footer a {
  font-size: 13px;
  line-height: 2.2;
  color: rgba(255,255,255,0.5);
  transition: color 0.3s;
}
.footer a:hover { color: var(--color-gold); }
.footer-bottom {
  max-width: var(--max-width);
  margin: 40px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.3);
}

/* ===== 管理后台（保持原有风格） ===== */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar { width: 220px; background: #1a1a1a; color: #fff; padding: 24px 0; }
.admin-sidebar .brand { padding: 0 24px 24px; font-size: 18px; font-weight: 700; border-bottom: 1px solid #333; }
.admin-sidebar nav { padding: 16px 0; }
.admin-sidebar nav a { display: block; padding: 12px 24px; color: #ccc; transition: all 0.3s; }
.admin-sidebar nav a:hover, .admin-sidebar nav a.active { background: #c9a96e; color: #1a1a1a; }
.admin-main { flex: 1; padding: 32px; background: #f5f5f5; }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; }
.admin-header h1 { font-size: 24px; }
.admin-header .user { color: #666; }
.admin-header .user a { color: #c9a96e; margin-left: 16px; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 32px; }
.stat-card { background: #fff; padding: 24px; border-radius: 8px; text-align: center; }
.stat-card .num { font-size: 36px; font-weight: 700; color: #c9a96e; }
.stat-card .label { color: #666; margin-top: 8px; }
.admin-table { width: 100%; background: #fff; border-radius: 8px; overflow: hidden; }
.admin-table th { background: #1a1a1a; color: #fff; padding: 14px 16px; text-align: left; font-size: 14px; }
.admin-table td { padding: 12px 16px; border-bottom: 1px solid #eee; font-size: 14px; }
.admin-table tr:hover { background: #f9f9f9; }
.btn { display: inline-block; padding: 8px 20px; border-radius: 4px; font-size: 14px; cursor: pointer; border: none; transition: all 0.3s; }
.btn-primary { background: #c9a96e; color: #1a1a1a; }
.btn-primary:hover { background: #d4b87a; }
.btn-danger { background: #e74c3c; color: #fff; }
.btn-danger:hover { background: #c0392b; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-secondary { background: #95a5a6; color: #fff; }
.btn-secondary:hover { background: #7f8c8d; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 14px; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 10px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; outline: none; }
.form-group input:focus, .form-group textarea:focus { border-color: #c9a96e; }
.login-box { max-width: 400px; margin: 100px auto; padding: 40px; background: #fff; border-radius: 8px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
.login-box h1 { text-align: center; margin-bottom: 32px; }
.login-box .error { background: #fef0f0; color: #a02020; padding: 12px; border-radius: 4px; margin-bottom: 16px; text-align: center; font-size: 14px; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .brand-grid { grid-template-columns: 1fr; gap: 48px; }
  .brand-image-placeholder { height: 280px; }
  .product-detail { grid-template-columns: 1fr; gap: 32px; padding: 40px 24px; }
  .image-gallery { position: static; }
  .main-image { height: 320px; }
  .reviews-grid { grid-template-columns: 1fr; gap: 20px; }
  .footer-content { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  :root { --section-padding: 64px; }
  .navbar { padding: 0 16px; height: 60px; }
  .navbar .logo { font-size: 7px; letter-spacing: 0.5px; gap: 4px; }
  .navbar .logo-img { height: 30px !important; max-width: 120px; }
  .navbar .logo-text { transform: translateY(-1px); font-size: 7px !important; }
  html[lang="zh-CN"] .navbar .logo-text { transform: translateY(-1px); font-size: 7px !important; }
  .nav-desktop { display: none !important; }
  .nav-hamburger { display: block; }
  .mobile-menu { top: 60px; }

  .hero { min-height: 440px; height: auto; padding: 80px 20px; }
  .hero h1 { font-size: 30px; letter-spacing: 3px; }
  .hero h1 span { font-size: 24px; }
  .hero p { font-size: 13px; letter-spacing: 2px; margin-bottom: 32px; }
  .hero .btn { padding: 12px 32px; font-size: 12px; }
  .hero-scroll { display: none; }

  .section { padding: var(--section-padding) 20px; }
  .section-title { margin-bottom: 40px; }
  .section-title h2 { font-size: 22px; }

  .stats-section { padding: 48px 20px; }
  .data-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 0; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--color-border); padding-bottom: 24px; margin-bottom: 0; }
  .stat-item:nth-child(3), .stat-item:nth-child(4) { border-bottom: none; padding-bottom: 0; }
  .stat-num { font-size: 32px; }
  .stat-num span { font-size: 16px; }
  .stat-label { font-size: 12px; }

  .product-grid { grid-template-columns: 1fr; gap: 36px; }
  .product-card .image { height: 220px; }

  .about-section { padding: 48px 20px; }
  .about-section h1 { font-size: 22px; }
  .about-features { grid-template-columns: 1fr; gap: 16px; margin-top: 36px; }
  .about-feature { padding: 24px 20px; }

  .verify-section { padding: 0 20px; margin: 48px auto; }
  .verify-section h1 { font-size: 22px; }
  .verify-form { flex-direction: column; gap: 0; }
  .verify-form input { width: 100%; border-right: 1px solid var(--color-border); border-bottom: none; padding: 14px; }
  .verify-form button { width: 100%; padding: 14px; }

  .verify-cta { padding: 56px 20px; }
  .verify-cta h2 { font-size: 22px; }
  .verify-cta p { font-size: 13px; }

  .review-text { min-height: auto; }
  .review-card { padding: 28px 24px; }

  .bottom-cta { padding: 56px 20px; }
  .bottom-cta h2 { font-size: 22px; }
  .bottom-cta p { font-size: 13px; }
  .btn-gold { padding: 12px 32px; font-size: 12px; }

  .footer { padding: 40px 20px 20px; }
  .footer-content { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { font-size: 11px; margin-top: 28px; padding-top: 16px; }

  .stats-grid { grid-template-columns: 1fr; }
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; }
  .admin-main { padding: 16px; }
  .login-box { margin: 40px auto; padding: 24px; }
  .admin-table { display: block; overflow-x: auto; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 24px; }
  .hero h1 span { font-size: 20px; }
  .section-title h2 { font-size: 20px; }
  .stat-num { font-size: 26px; }
  .stat-num span { font-size: 14px; }
  .verify-cta h2, .bottom-cta h2 { font-size: 20px; }
  .product-detail .info h1 { font-size: 22px; }
  .thumb { width: 56px; height: 56px; }
}