/* ===== 超凡国际h5 - 独特视觉设计系统 ===== */
/* 风格：野兽派 × 流体渐变 × 解构网格 */
/* 主色：暗紫罗兰(#2d1b4e) + 霓虹玫红(#ff2a6d) + 青石灰(#00f0ff) */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;500;700;900&display=swap');

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

:root {
  --bg-primary: #1a0f2e;
  --bg-secondary: #2d1b4e;
  --accent-neon: #ff2a6d;
  --accent-cyan: #00f0ff;
  --accent-gold: #ffd700;
  --text-light: #f5e6ff;
  --text-muted: #b8a9d4;
  --glass-bg: rgba(45, 27, 78, 0.6);
  --glass-border: rgba(0, 240, 255, 0.2);
  --shadow-neon: 0 0 30px rgba(255, 42, 109, 0.3);
  --radius-xl: 24px;
  --radius-lg: 16px;
  --radius-sm: 8px;
}

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

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ===== 背景动态网格 ===== */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-image: 
    linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ===== 容器 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ===== 头部 ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; width: 100%;
  background: rgba(26, 15, 46, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  transition: background 0.4s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: 1280px;
  margin: 0 auto;
}

.logo {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent-neon), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  position: relative;
  transition: transform 0.3s ease;
}

.logo::after {
  content: '✦';
  position: absolute;
  right: -28px;
  top: -4px;
  font-size: 1rem;
  -webkit-text-fill-color: var(--accent-gold);
  animation: pulse-gold 2s ease-in-out infinite;
}

@keyframes pulse-gold {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.3); }
}

.logo:hover {
  transform: scale(1.05);
}

.main-nav {
  display: flex;
  gap: 32px;
  align-items: center;
}

.main-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s ease;
}

.main-nav a::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-neon);
  transition: width 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 0 0 10px var(--accent-neon);
}

.main-nav a:hover {
  color: var(--text-light);
}

.main-nav a:hover::before {
  width: 100%;
}

.nav-cta {
  background: var(--accent-neon);
  color: #fff !important;
  padding: 10px 28px !important;
  border-radius: 50px;
  font-weight: 700 !important;
  letter-spacing: 0.08em;
  box-shadow: 0 0 20px rgba(255, 42, 109, 0.4);
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.nav-cta:hover {
  background: transparent;
  color: var(--accent-neon) !important;
  border-color: var(--accent-neon);
  box-shadow: 0 0 40px rgba(255, 42, 109, 0.6);
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 36px;
  height: 36px;
  position: relative;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--text-light);
  margin: 6px auto;
  transition: all 0.3s ease;
  border-radius: 4px;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(255, 42, 109, 0.15) 0%, transparent 70%);
  pointer-events: none;
  animation: float-glow 8s ease-in-out infinite alternate;
}

@keyframes float-glow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-40px, 40px) scale(1.1); }
}

.hero-content {
  flex: 1;
  max-width: 640px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  padding: 6px 16px;
  border: 1px solid var(--accent-cyan);
  border-radius: 50px;
  margin-bottom: 24px;
  animation: fadeSlideUp 0.8s ease forwards;
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  animation: fadeSlideUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.hero h1 .text-accent {
  background: linear-gradient(135deg, var(--accent-neon), var(--accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.8;
  animation: fadeSlideUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeSlideUp 0.8s ease 0.6s forwards;
  opacity: 0;
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-image {
  flex: 1;
  min-height: 400px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image::after {
  content: '✦ ✦ ✦';
  font-size: 8rem;
  color: var(--accent-neon);
  opacity: 0.2;
  letter-spacing: 2rem;
  animation: spin-slow 20s linear infinite;
}

@keyframes spin-slow {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.1); }
  100% { transform: rotate(360deg) scale(1); }
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border: 2px solid transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-neon);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 42, 109, 0.4);
}

.btn-primary:hover {
  background: transparent;
  color: var(--accent-neon);
  border-color: var(--accent-neon);
  box-shadow: 0 0 40px rgba(255, 42, 109, 0.5);
  transform: translateY(-3px);
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.btn-outline:hover {
  background: var(--accent-cyan);
  color: var(--bg-primary);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.4);
  transform: translateY(-3px);
}

/* ===== 通用区块 ===== */
.section {
  padding: 100px 0;
  position: relative;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--accent-neon);
  text-transform: uppercase;
  margin-bottom: 16px;
  border-left: 3px solid var(--accent-neon);
  padding-left: 12px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  line-height: 1.15;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.8;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.category-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--accent-neon), var(--accent-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}

.category-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-neon);
  box-shadow: var(--shadow-neon);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  font-size: 2.8rem;
  margin-bottom: 20px;
  display: block;
  transition: transform 0.3s ease;
}

.category-card:hover .card-icon {
  transform: scale(1.2) rotate(-5deg);
}

.category-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.category-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 600;
  transition: gap 0.3s ease;
}

.card-link:hover {
  gap: 16px;
  color: var(--accent-neon);
}

/* ===== 特色区块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin: 80px 0;
}

.feature-image {
  background: var(--glass-bg);
  border-radius: var(--radius-xl);
  min-height: 360px;
  border: 1px solid var(--glass-border);
  background-image: radial-gradient(circle at 30% 40%, var(--accent-neon) 0%, transparent 50%),
                    radial-gradient(circle at 70% 60%, var(--accent-cyan) 0%, transparent 40%);
  position: relative;
  overflow: hidden;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.3;
}

.feature-text {
  padding: 20px 0;
}

.feature-text .section-title {
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
  margin-top: 24px;
}

.feature-list li {
  padding: 12px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.feature-list li::before {
  content: '▸';
  color: var(--accent-neon);
  font-weight: 700;
}

/* ===== 统计栏 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  padding: 60px 0;
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
  margin: 60px 0;
}

.stat-item {
  text-align: center;
  padding: 20px;
}

.stat-number {
  font-size: 3.2rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent-neon), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  font-weight: 500;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin: 48px 0;
}

.content-wall-item {
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.4s ease;
  position: relative;
}

.content-wall-item:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 240, 255, 0.1);
}

.content-wall-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.content-wall-body p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 40px auto;
}

.faq-item {
  border-bottom: 1px solid var(--glass-border);
  padding: 20px 0;
  cursor: pointer;
  transition: all 0.3s ease;
}

.faq-item summary {
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  list-style: none;
  cursor: pointer;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--accent-neon);
  transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-answer {
  padding: 16px 0 8px;
  color: var(--text-muted);
  line-height: 1.8;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== CTA ===== */
.cta-banner {
  background: linear-gradient(135deg, var(--bg-secondary), #3a1f6e);
  border-radius: var(--radius-xl);
  padding: 80px 60px;
  text-align: center;
  margin: 80px 0;
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(255, 42, 109, 0.1) 0%, transparent 50%);
  animation: rotate-glow 15s linear infinite;
}

@keyframes rotate-glow {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.cta-banner h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto 32px;
  font-size: 1.1rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn {
  position: relative;
  z-index: 1;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: 60px 0 0;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-brand .logo {
  font-size: 1.6rem;
  display: inline-block;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 300px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-light);
  letter-spacing: 0.05em;
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 0;
  font-size: 0.9rem;
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.footer-col a:hover {
  color: var(--accent-cyan);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid var(--glass-border);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== 辅助类 ===== */
.text-accent {
  color: var(--accent-neon);
}

.text-center {
  text-align: center;
}

.seo-description {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 0; right: -100%;
    width: 70%;
    height: 100vh;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 100px 40px 40px;
    gap: 24px;
    transition: right 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-left: 1px solid var(--glass-border);
    z-index: 1000;
  }

  .main-nav.active {
    right: 0;
  }

  .main-nav a {
    font-size: 1.1rem;
  }

  .nav-cta {
    width: 100%;
    text-align: center;
  }

  .hero {
    padding: 100px 0 60px;
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero p {
    margin: 0 auto 32px;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    min-height: 200px;
    margin-top: 40px;
  }

  .hero-image::after {
    font-size: 4rem;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .stats-bar {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .stat-number {
    font-size: 2.4rem;
  }

  .cta-banner {
    padding: 48px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .header-inner {
    padding: 12px 16px;
  }

  .logo {
    font-size: 1.4rem;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

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

  .btn {
    padding: 12px 28px;
    font-size: 0.9rem;
  }

  .content-wall {
    grid-template-columns: 1fr;
  }
}