/* ============================================
   style.css — 韩国漫画 gpwdq.com
   风格：活力韩流 · 渐变 · 毛玻璃 · 暗色
   生成日期: 2025-04-05
   ============================================ */

/* ---------- 基础重置 & 变量 ---------- */
:root {
  --primary: #e94560;
  --primary-dark: #c73a4f;
  --primary-light: #ff6b81;
  --secondary: #1a1a2e;
  --secondary-light: #2a2a3e;
  --accent-gold: #ffd700;
  --accent-blue: #4fc3f7;
  --accent-purple: #9c27b0;
  --bg-light: #f5f5fa;
  --bg-dark: #121212;
  --card-bg: #ffffff;
  --card-bg-dark: #2a2a3a;
  --text: #222222;
  --text-muted: #666666;
  --text-light: #dddddd;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-light);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

a {
  color: #1e3a5f;
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  text-decoration: underline;
  color: var(--primary);
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ---------- 滚动条美化 ---------- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* ---------- 选中颜色 ---------- */
::selection {
  background: var(--primary);
  color: #fff;
}

/* ---------- 头部导航 ---------- */
.site-header {
  background: var(--secondary);
  color: #fff;
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  background: rgba(26, 26, 46, 0.95);
  transition: background var(--transition);
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.5px;
  text-shadow: 0 2px 10px rgba(233, 69, 96, 0.3);
}
.logo span {
  color: #fff;
}

.nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.nav a {
  color: #ddd;
  font-size: 0.95rem;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}
.nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.nav a:hover {
  background: var(--primary);
  color: #fff;
  text-decoration: none;
}
.nav a:hover::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  background: none;
  border: 2px solid var(--primary);
  color: var(--primary);
  font-size: 1.2rem;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}
.menu-toggle:hover {
  background: var(--primary);
  color: #fff;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 6px;
}
.search-box input {
  padding: 8px 16px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-xl);
  font-size: 0.9rem;
  outline: none;
  width: 180px;
  background: rgba(255,255,255,0.08);
  color: #fff;
  transition: all var(--transition);
}
.search-box input:focus {
  border-color: var(--primary);
  background: rgba(255,255,255,0.15);
  width: 220px;
}
.search-box input::placeholder {
  color: rgba(255,255,255,0.5);
}
.search-box button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 8px 18px;
  border-radius: var(--radius-xl);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
}
.search-box button:hover {
  background: var(--primary-dark);
  transform: scale(1.05);
}

.dark-toggle {
  background: none;
  border: 2px solid var(--primary);
  color: var(--primary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.1rem;
  margin-left: 10px;
  transition: all var(--transition);
}
.dark-toggle:hover {
  background: var(--primary);
  color: #fff;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(6px);
  padding: 10px 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  font-size: 0.9rem;
  color: var(--text-muted);
}
.breadcrumb a {
  color: #1e3a5f;
  transition: color var(--transition);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb span {
  margin: 0 6px;
  color: #aaa;
}

/* ---------- Banner 渐变轮播 ---------- */
.banner {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  color: #fff;
  min-height: 380px;
  display: flex;
  align-items: center;
}
.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(233,69,96,0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(79,195,247,0.1) 0%, transparent 40%);
  animation: bannerGlow 8s ease-in-out infinite alternate;
}
@keyframes bannerGlow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-20px, 20px); }
}

.banner-slide {
  display: none;
  padding: 50px 20px;
  text-align: center;
  width: 100%;
  position: relative;
  z-index: 1;
}
.banner-slide.active {
  display: block;
  animation: fadeIn 0.6s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.banner h2 {
  font-size: 2.4rem;
  margin-bottom: 16px;
  color: var(--primary);
  text-shadow: 0 2px 20px rgba(233,69,96,0.3);
  font-weight: 800;
  letter-spacing: -0.5px;
}
.banner p {
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto 24px;
  color: rgba(255,255,255,0.85);
  line-height: 1.8;
}
.banner .btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  padding: 14px 36px;
  border-radius: var(--radius-xl);
  display: inline-block;
  font-weight: 700;
  font-size: 1rem;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(233,69,96,0.4);
  text-decoration: none;
}
.banner .btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 30px rgba(233,69,96,0.5);
  text-decoration: none;
}

.banner-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 2;
}
.banner-dots span {
  width: 14px;
  height: 14px;
  background: rgba(255,255,255,0.3);
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
}
.banner-dots span.active {
  background: var(--primary);
  border-color: #fff;
  transform: scale(1.2);
  box-shadow: 0 0 16px rgba(233,69,96,0.6);
}
.banner-dots span:hover {
  background: var(--primary-light);
}

/* ---------- 通用区块 ---------- */
section {
  padding: 60px 0;
  position: relative;
}

.section-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 40px;
  color: var(--secondary);
  position: relative;
  font-weight: 800;
  letter-spacing: -0.3px;
}
.section-title:after {
  content: '';
  display: block;
  width: 70px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  margin: 14px auto 0;
  border-radius: 2px;
}

/* ---------- 品牌介绍 ---------- */
.brand-intro {
  background: var(--card-bg);
  position: relative;
  overflow: hidden;
}
.brand-intro::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(233,69,96,0.05), transparent);
  border-radius: 50%;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.intro-text p {
  margin-bottom: 18px;
  color: #444;
  line-height: 1.8;
}
.intro-text strong {
  color: var(--primary);
}
.intro-img svg {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition);
}
.intro-img svg:hover {
  transform: scale(1.02);
}

/* ---------- 产品优势 ---------- */
.products {
  background: linear-gradient(180deg, #f0f0f8, #e8e8f5);
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 28px;
}
.product-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all var(--transition);
  border: 1px solid transparent;
  backdrop-filter: blur(4px);
}
.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(233,69,96,0.15);
}
.product-card svg {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  border-radius: var(--radius-sm);
  transition: transform var(--transition);
}
.product-card:hover svg {
  transform: scale(1.1) rotate(4deg);
}
.product-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--secondary);
  font-weight: 700;
}
.product-card p {
  color: #555;
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- 解决方案 ---------- */
.solutions {
  background: var(--card-bg);
}
.solution-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.solution-item {
  background: #f9f9fe;
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border-left: 5px solid var(--primary);
  transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.solution-item:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--primary-light);
}
.solution-item h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--secondary);
  font-weight: 700;
}
.solution-item p {
  color: #555;
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- 客户案例 ---------- */
.cases {
  background: linear-gradient(180deg, #f0f0f8, #e8e8f5);
}
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}
.case-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  overflow: hidden;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.case-card svg {
  width: 100%;
  height: 150px;
  margin-bottom: 14px;
  border-radius: var(--radius-sm);
  background: #e8e8f0;
  transition: transform var(--transition);
}
.case-card:hover svg {
  transform: scale(1.03);
}
.case-card h4 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--secondary);
  font-weight: 700;
}
.case-card p {
  color: #555;
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---------- 客户评价 (毛玻璃) ---------- */
.testimonials {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.testimonials::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(233,69,96,0.1), transparent);
  top: -100px;
  right: -100px;
  border-radius: 50%;
}
.testimonials .section-title {
  color: #fff;
}
.testimonials .section-title:after {
  background: linear-gradient(90deg, var(--primary), #fff);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.testimonial-card {
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
  transition: all var(--transition);
}
.testimonial-card:hover {
  background: rgba(255,255,255,0.12);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.testimonial-card p {
  font-style: italic;
  margin-bottom: 14px;
  color: rgba(255,255,255,0.9);
  line-height: 1.8;
}
.testimonial-card .author {
  font-weight: 600;
  color: var(--primary);
}

/* ---------- 新闻/文章 ---------- */
.articles {
  background: var(--card-bg);
}
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.article-card {
  background: #f9f9fe;
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.article-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(233,69,96,0.1);
  transform: translateY(-3px);
}
.article-card .date {
  font-size: 0.8rem;
  color: #999;
  margin-bottom: 8px;
  display: inline-block;
  background: rgba(233,69,96,0.08);
  padding: 2px 10px;
  border-radius: 20px;
}
.article-card h3 {
  font-size: 1.05rem;
  margin-bottom: 10px;
  color: var(--secondary);
  font-weight: 700;
  line-height: 1.5;
}
.article-card p {
  color: #555;
  font-size: 0.9rem;
  margin-bottom: 14px;
  line-height: 1.7;
}
.article-card .read-more {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.article-card .read-more:hover {
  gap: 8px;
  color: var(--primary-dark);
}

/* ---------- FAQ ---------- */
.faq-section {
  background: linear-gradient(180deg, #f0f0f8, #e8e8f5);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid rgba(0,0,0,0.08);
  padding: 18px 0;
  cursor: pointer;
  transition: all var(--transition);
}
.faq-item:first-child {
  border-top: 1px solid rgba(0,0,0,0.08);
}
.faq-item .question {
  font-weight: 600;
  font-size: 1.05rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--secondary);
  transition: color var(--transition);
}
.faq-item .question .icon {
  font-size: 1.4rem;
  transition: transform 0.4s ease;
  color: var(--primary);
  flex-shrink: 0;
  margin-left: 12px;
}
.faq-item .answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease, padding 0.3s ease;
  color: #555;
  padding-top: 0;
  line-height: 1.8;
}
.faq-item.open .answer {
  max-height: 500px;
  padding-top: 14px;
}
.faq-item.open .question .icon {
  transform: rotate(45deg);
}
.faq-item:hover .question {
  color: var(--primary);
}

/* ---------- HowTo ---------- */
.howto {
  background: var(--card-bg);
}
.howto-steps {
  max-width: 800px;
  margin: 0 auto;
}
.howto-step {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  align-items: flex-start;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.howto-step:hover {
  background: rgba(233,69,96,0.03);
}
.howto-step .step-num {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(233,69,96,0.3);
}
.howto-step .step-content h4 {
  font-size: 1.05rem;
  color: var(--secondary);
  margin-bottom: 6px;
  font-weight: 700;
}
.howto-step .step-content p {
  color: #555;
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- 联系我们 ---------- */
.contact {
  background: linear-gradient(135deg, #1a1a2e, #0f3460);
  color: #fff;
  position: relative;
}
.contact .section-title {
  color: #fff;
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  text-align: center;
}
.contact-item {
  padding: 24px 16px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.08);
  transition: all var(--transition);
}
.contact-item:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-4px);
}
.contact-item svg {
  width: 44px;
  height: 44px;
  margin: 0 auto 14px;
}
.contact-item p {
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ---------- 底部 ---------- */
.site-footer {
  background: #0f0f1a;
  color: #bbb;
  padding: 36px 0;
  font-size: 0.9rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  margin-bottom: 20px;
}
.footer-links a {
  color: #bbb;
  transition: color var(--transition);
  position: relative;
}
.footer-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--primary);
  transition: width var(--transition);
}
.footer-links a:hover {
  color: var(--primary);
  text-decoration: none;
}
.footer-links a:hover::after {
  width: 100%;
}
.footer-info {
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 20px;
  margin-top: 20px;
}
.footer-info p {
  margin-bottom: 6px;
  line-height: 1.6;
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  border: none;
  z-index: 999;
  box-shadow: 0 4px 20px rgba(233,69,96,0.4);
}
.back-top.show {
  opacity: 1;
  visibility: visible;
}
.back-top:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 8px 30px rgba(233,69,96,0.5);
}

/* ---------- 暗黑模式 ---------- */
body.dark {
  background: var(--bg-dark);
  color: #eee;
}
body.dark .site-header {
  background: rgba(10, 10, 26, 0.95);
}
body.dark .brand-intro,
body.dark .solutions,
body.dark .articles,
body.dark .howto,
body.dark .breadcrumb {
  background: #1e1e2a;
  color: #eee;
}
body.dark .breadcrumb {
  border-bottom-color: rgba(255,255,255,0.06);
}
body.dark .product-card,
body.dark .solution-item,
body.dark .case-card,
body.dark .article-card,
body.dark .faq-item {
  background: var(--card-bg-dark);
  color: #eee;
  border-color: rgba(255,255,255,0.05);
}
body.dark .faq-item .question {
  color: #eee;
}
body.dark .faq-item .answer {
  color: #ccc;
}
body.dark .faq-item {
  border-bottom-color: rgba(255,255,255,0.08);
}
body.dark .faq-item:first-child {
  border-top-color: rgba(255,255,255,0.08);
}
body.dark .section-title {
  color: #eee;
}
body.dark .product-card p,
body.dark .solution-item p,
body.dark .case-card p,
body.dark .article-card p,
body.dark .brand-intro .intro-text p {
  color: #ccc;
}
body.dark .banner {
  background: linear-gradient(135deg, #0a0a1a, #12122a);
}
body.dark .testimonials {
  background: linear-gradient(135deg, #0a0a1a, #12122a);
}
body.dark .contact {
  background: linear-gradient(135deg, #0a0a1a, #0f0f2a);
}
body.dark .site-footer {
  background: #050510;
}
body.dark .article-card .date {
  background: rgba(233,69,96,0.15);
  color: #ccc;
}
body.dark .search-box input {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.1);
}
body.dark .search-box input:focus {
  background: rgba(255,255,255,0.1);
}
body.dark .solution-item {
  background: #2a2a3a;
}
body.dark .article-card {
  background: #2a2a3a;
}
body.dark .howto-step:hover {
  background: rgba(233,69,96,0.05);
}
body.dark .contact-item {
  background: rgba(255,255,255,0.04);
}

/* ---------- 滚动动画 ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式设计 ---------- */
@media (max-width: 992px) {
  .intro-grid {
    gap: 30px;
  }
  .banner h2 {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    gap: 12px;
  }
  .nav {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 6px;
    background: rgba(26,26,46,0.98);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-top: 4px;
  }
  .nav.open {
    display: flex;
  }
  .nav a {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
  }
  .nav a::after {
    display: none;
  }
  .menu-toggle {
    display: block;
  }
  .search-box input {
    width: 130px;
  }
  .search-box input:focus {
    width: 160px;
  }
  .brand-intro .intro-grid {
    grid-template-columns: 1fr;
  }
  .banner {
    min-height: 300px;
  }
  .banner h2 {
    font-size: 1.6rem;
  }
  .banner p {
    font-size: 1rem;
  }
  .section-title {
    font-size: 1.6rem;
  }
  section {
    padding: 40px 0;
  }
  .product-grid,
  .solution-list,
  .case-grid,
  .article-grid,
  .testimonial-grid {
    gap: 20px;
  }
  .howto-step {
    flex-direction: column;
    gap: 12px;
    padding: 12px 16px;
  }
  .back-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
  }
  .footer-links {
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 14px;
  }
  .logo {
    font-size: 1.4rem;
  }
  .search-box input {
    width: 100px;
  }
  .search-box input:focus {
    width: 130px;
  }
  .banner h2 {
    font-size: 1.3rem;
  }
  .banner .btn {
    padding: 12px 28px;
    font-size: 0.9rem;
  }
  .section-title {
    font-size: 1.3rem;
  }
  .product-card,
  .solution-item,
  .case-card,
  .article-card {
    padding: 18px;
  }
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  .site-header,
  .banner,
  .back-top,
  .search-box,
  .dark-toggle,
  .menu-toggle {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .container {
    max-width: 100%;
  }
  a {
    color: #000;
  }
}