/* ===== 3377体育首页 - 完整样式表 ===== */
/* 暗色模式（默认） */
:root {
  --primary: #f59e0b;
  --primary-dark: #d97706;
  --primary-light: #fbbf24;
  --bg: #0b0f1a;
  --bg2: #111827;
  --bg3: #1f2937;
  --text: #f3f4f6;
  --text2: #9ca3af;
  --text3: #6b7280;
  --card: #1f2937;
  --card-hover: #374151;
  --border: #374151;
  --radius: 16px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 亮色模式 */
body.light {
  --bg: #f8fafc;
  --bg2: #f1f5f9;
  --bg3: #e2e8f0;
  --text: #0f172a;
  --text2: #475569;
  --text3: #94a3b8;
  --card: #ffffff;
  --card-hover: #f1f5f9;
  --border: #e2e8f0;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

/* 链接 */
a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--primary-light);
}

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

/* 容器 */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 标题 */
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  color: var(--text2);
  font-size: 1.1rem;
  margin-bottom: 3rem;
  max-width: 600px;
}

/* 网格 */
.grid {
  display: grid;
  gap: 24px;
}

/* 卡片 */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  border-color: var(--primary);
}
body.light .card:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #0b0f1a;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.5);
  color: #0b0f1a;
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  box-shadow: none;
}
.btn-outline:hover {
  background: var(--primary);
  color: #0b0f1a;
}

/* 毛玻璃 */
.glass {
  background: rgba(31, 41, 55, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
body.light .glass {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

/* ===== Header ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: var(--transition);
}
header.scrolled {
  background: rgba(11, 15, 26, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}
body.light header.scrolled {
  background: rgba(255, 255, 255, 0.92);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
}
.logo svg {
  width: 40px;
  height: 40px;
}
.logo span {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 导航 */
nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
nav a {
  padding: 8px 16px;
  border-radius: 8px;
  color: var(--text2);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}
nav a:hover,
nav a.active {
  color: var(--primary);
  background: rgba(245, 158, 11, 0.1);
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}
.nav-toggle span {
  width: 28px;
  height: 2.5px;
  background: var(--text);
  border-radius: 4px;
  transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 头部操作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 主题切换按钮 */
.theme-toggle {
  background: none;
  border: 2px solid var(--border);
  border-radius: 50%;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text2);
  font-size: 1.2rem;
}
.theme-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-bg .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.3;
  animation: orbFloat 20s ease-in-out infinite;
}
.hero-bg .orb:nth-child(1) {
  width: 600px;
  height: 600px;
  background: var(--primary);
  top: -10%;
  left: -10%;
  animation-delay: 0s;
}
.hero-bg .orb:nth-child(2) {
  width: 500px;
  height: 500px;
  background: #8b5cf6;
  bottom: -10%;
  right: -10%;
  animation-delay: -7s;
}
.hero-bg .orb:nth-child(3) {
  width: 400px;
  height: 400px;
  background: #06b6d4;
  top: 40%;
  left: 50%;
  animation-delay: -14s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: 40px 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: 50px;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
  transition: transform 0.2s;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero h1 .highlight {
  background: linear-gradient(135deg, var(--primary), var(--primary-light), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text2);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

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

.hero-stats {
  display: flex;
  gap: 40px;
  justify-content: center;
  margin-top: 60px;
  flex-wrap: wrap;
}
.hero-stat {
  text-align: center;
}
.hero-stat .num {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
}
.hero-stat .label {
  font-size: 0.9rem;
  color: var(--text3);
  margin-top: 4px;
}

/* ===== Sections ===== */
section {
  padding: 80px 0;
}

/* ===== Brand ===== */
.brand-grid {
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.brand-image {
  display: flex;
  justify-content: center;
  align-items: center;
}
.brand-image svg {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.brand-text h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.brand-text p {
  color: var(--text2);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.brand-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}
.brand-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--bg3);
  border-radius: 12px;
  font-size: 0.95rem;
  color: var(--text2);
}
.brand-feature svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

/* ===== Products ===== */
.products-grid {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}
.product-card {
  padding: 0;
  overflow: hidden;
}
.product-card .card-img {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg3), var(--bg2));
  border-bottom: 1px solid var(--border);
}
.product-card .card-img svg {
  width: 80px;
  height: 80px;
}
.product-card .card-body {
  padding: 24px;
}
.product-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.product-card p {
  color: var(--text2);
  font-size: 0.95rem;
  margin-bottom: 16px;
}
.product-card .tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 50px;
  background: rgba(245, 158, 11, 0.15);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
}

/* ===== Services ===== */
.services-grid {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.service-card {
  text-align: center;
  padding: 36px 24px;
}
.service-card svg {
  width: 56px;
  height: 56px;
  margin-bottom: 16px;
}
.service-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.service-card p {
  color: var(--text2);
  font-size: 0.95rem;
}

/* ===== Cases ===== */
.cases-grid {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}
.case-card {
  padding: 0;
  overflow: hidden;
}
.case-card .case-img {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg3), var(--bg2));
  border-bottom: 1px solid var(--border);
}
.case-card .case-img svg {
  width: 70px;
  height: 70px;
}
.case-card .case-body {
  padding: 24px;
}
.case-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.case-card p {
  color: var(--text2);
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.case-card .case-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text3);
}

/* ===== Testimonials ===== */
.testimonials-grid {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}
.testimonial-card {
  position: relative;
  padding: 32px;
}
.testimonial-card .quote {
  font-size: 3rem;
  color: var(--primary);
  opacity: 0.3;
  position: absolute;
  top: 16px;
  left: 24px;
  line-height: 1;
}
.testimonial-card p {
  color: var(--text2);
  font-style: italic;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}
.testimonial-card .author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.testimonial-card .author svg {
  width: 44px;
  height: 44px;
  border-radius: 50%;
}
.testimonial-card .author .name {
  font-weight: 600;
}
.testimonial-card .author .role {
  font-size: 0.85rem;
  color: var(--text3);
}

/* ===== Partners ===== */
.partners-grid {
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  align-items: center;
  gap: 32px;
}
.partner-item {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px;
  opacity: 0.6;
  transition: var(--transition);
  filter: grayscale(1);
}
.partner-item:hover {
  opacity: 1;
  filter: grayscale(0);
}
.partner-item svg {
  width: 100px;
  height: auto;
  max-height: 50px;
}

/* ===== News ===== */
.news-grid {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}
.news-card {
  padding: 0;
  overflow: hidden;
}
.news-card .news-img {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg3), var(--bg2));
  border-bottom: 1px solid var(--border);
}
.news-card .news-img svg {
  width: 60px;
  height: 60px;
}
.news-card .news-body {
  padding: 24px;
}
.news-card .news-date {
  font-size: 0.8rem;
  color: var(--text3);
  margin-bottom: 6px;
}
.news-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.4;
}
.news-card p {
  color: var(--text2);
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.news-card .read-more {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  cursor: pointer;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  font-weight: 600;
  padding: 8px 0;
  gap: 16px;
}
.faq-question .icon {
  font-size: 1.4rem;
  transition: var(--transition);
  flex-shrink: 0;
  color: var(--primary);
}
.faq-item.active .faq-question .icon {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: var(--transition);
  color: var(--text2);
  padding: 0 16px 0 0;
  line-height: 1.8;
}
.faq-item.active .faq-answer {
  max-height: 600px;
  padding: 12px 16px 16px 0;
}

/* ===== HowTo ===== */
.howto-steps {
  max-width: 700px;
  margin: 0 auto;
}
.howto-step {
  display: flex;
  gap: 20px;
  margin-bottom: 24px;
  align-items: flex-start;
}
.howto-step .step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #0b0f1a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.howto-step .step-content h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.howto-step .step-content p {
  color: var(--text2);
  font-size: 0.95rem;
}

/* ===== Contact ===== */
.contact-grid {
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.contact-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.contact-info p {
  color: var(--text2);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.contact-info svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--primary);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 18px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  font-size: 1rem;
  transition: var(--transition);
  margin-bottom: 16px;
  outline: none;
}
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
}
.contact-form textarea {
  min-height: 120px;
  resize: vertical;
}
.contact-form button {
  width: 100%;
}

/* ===== Footer ===== */
footer {
  background: var(--bg2);
  padding: 60px 0 30px;
  border-top: 1px solid var(--border);
}
.footer-grid {
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand p {
  color: var(--text2);
  margin-top: 12px;
  max-width: 300px;
  font-size: 0.95rem;
}
.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}
.footer-col a {
  display: block;
  color: var(--text2);
  padding: 4px 0;
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text3);
}
.footer-bottom-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-bottom-links a {
  color: var(--text3);
  font-size: 0.85rem;
}
.footer-bottom-links a:hover {
  color: var(--primary);
}

/* ===== Back to top ===== */
#backToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #0b0f1a;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  z-index: 999;
}
#backToTop.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
#backToTop:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.5);
}

/* ===== Search overlay ===== */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.search-overlay.active {
  display: flex;
}
.search-modal {
  background: var(--card);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 600px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}
.search-modal input {
  width: 100%;
  padding: 16px 20px;
  border-radius: 12px;
  border: 2px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  font-size: 1.1rem;
  outline: none;
  transition: var(--transition);
}
.search-modal input:focus {
  border-color: var(--primary);
}
.search-modal .close-search {
  display: block;
  margin-top: 16px;
  text-align: center;
  color: var(--text3);
  cursor: pointer;
  font-size: 0.9rem;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .brand-grid {
    grid-template-columns: 1fr;
  }
  .brand-image {
    order: -1;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.4rem;
  }
  .hero-stats {
    gap: 24px;
  }
  .hero-stat .num {
    font-size: 2rem;
  }
  .section-title {
    font-size: 1.8rem;
  }

  /* 移动端导航 */
  .nav-toggle {
    display: flex;
  }
  nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(11, 15, 26, 0.98);
    backdrop-filter: blur(24px);
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    transform: translateY(-120%);
    transition: var(--transition);
    opacity: 0;
    pointer-events: none;
    border-bottom: 1px solid var(--border);
  }
  body.light nav {
    background: rgba(255, 255, 255, 0.98);
  }
  nav.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  nav a {
    padding: 14px 20px;
    font-size: 1rem;
    border-radius: 12px;
  }

  .header-inner {
    padding: 12px 0;
  }

  .brand-features {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
  .products-grid,
  .services-grid,
  .cases-grid,
  .testimonials-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== 亮色模式 override ===== */
body.light .hero-bg .orb {
  opacity: 0.15;
}
body.light .glass {
  background: rgba(255, 255, 255, 0.8);
}