/* === 巅峰国际h5 - 独特视觉设计系统 === */
/* 风格：赛博朋克+液态金属+解构网格 */

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

:root {
  --primary: #ff2d55;
  --secondary: #00f0ff;
  --accent: #ffd700;
  --bg-dark: #0a0a1a;
  --bg-card: #14142b;
  --text-light: #e8e8f0;
  --text-muted: #8888aa;
  --glass-bg: rgba(20, 20, 43, 0.75);
  --glass-border: rgba(0, 240, 255, 0.15);
  --shadow-neon: 0 0 30px rgba(0, 240, 255, 0.2);
  --font-family: 'Noto Sans SC', -apple-system, 'PingFang SC', sans-serif;
}

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

body {
  font-family: var(--font-family);
  background: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
}

/* === 容器 === */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
}

/* === 头部 - 液态玻璃导航 === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: background 0.4s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  padding: 0 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
  transition: transform 0.3s ease;
  cursor: pointer;
}

.logo::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--secondary), var(--primary));
  margin-top: 4px;
  border-radius: 2px;
}

.logo:hover {
  transform: scale(1.02);
}

.main-nav {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.main-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.03em;
  position: relative;
  padding: 0.5rem 0;
  transition: color 0.3s ease;
}

.main-nav a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--secondary), var(--primary));
  transition: width 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

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

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

.nav-cta {
  background: linear-gradient(135deg, var(--primary), #ff6b6b);
  color: #fff !important;
  padding: 0.6rem 1.8rem !important;
  border-radius: 50px;
  font-weight: 700 !important;
  box-shadow: 0 4px 20px rgba(255, 45, 85, 0.3);
  transition: all 0.3s ease !important;
}

.nav-cta::before {
  display: none !important;
}

.nav-cta:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 30px rgba(255, 45, 85, 0.5);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 8px;
  background: transparent;
  border: none;
}

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

/* === Hero 区域 - 解构网格+3D纵深 === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 120px 0 80px;
  background: radial-gradient(ellipse at 20% 50%, rgba(255, 45, 85, 0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(0, 240, 255, 0.06) 0%, transparent 60%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background-image: 
    linear-gradient(0deg, 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;
  transform: rotate(15deg) scale(1.2);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(255, 215, 0, 0.1);
  padding: 0.4rem 1.2rem;
  border-radius: 30px;
  border: 1px solid rgba(255, 215, 0, 0.2);
  margin-bottom: 1.5rem;
  animation: fadeSlideUp 0.8s ease forwards;
}

.hero-content h1 {
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #fff 30%, var(--secondary) 70%, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
  animation: fadeSlideUp 0.8s ease 0.1s forwards;
  opacity: 0;
}

.hero-content p {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  animation: fadeSlideUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.hero-buttons {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  animation: fadeSlideUp 0.8s ease 0.3s forwards;
  opacity: 0;
}

.hero-image {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 45%;
  height: 60%;
  background: linear-gradient(145deg, rgba(0, 240, 255, 0.05), rgba(255, 45, 85, 0.05));
  border-radius: 30px;
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  z-index: 1;
  overflow: hidden;
}

.hero-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 40%, var(--secondary) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, var(--primary) 0%, transparent 50%);
  opacity: 0.15;
  animation: pulseGlow 4s ease-in-out infinite;
}

/* === 按钮 === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 2.4rem;
  border-radius: 60px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #ff6b6b);
  color: #fff;
  box-shadow: 0 4px 25px rgba(255, 45, 85, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 40px rgba(255, 45, 85, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--secondary);
  border: 2px solid var(--secondary);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.1);
}

.btn-outline:hover {
  background: rgba(0, 240, 255, 0.1);
  transform: translateY(-3px);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.2);
}

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

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(255, 215, 0, 0.08);
  padding: 0.3rem 1.2rem;
  border-radius: 30px;
  border: 1px solid rgba(255, 215, 0, 0.15);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.2rem;
  color: #fff;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 650px;
  line-height: 1.8;
}

/* === 卡片网格 - 野兽派+玻璃态 === */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.category-card {
  background: var(--bg-card);
  border-radius: 24px;
  padding: 2.5rem 2rem;
  border: 1px solid rgba(255, 255, 255, 0.04);
  transition: all 0.5s cubic-bezier(0.25, 1, 0.5, 1);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

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

.category-card:hover {
  transform: translateY(-10px);
  border-color: rgba(0, 240, 255, 0.15);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), var(--shadow-neon);
}

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

.card-icon {
  font-size: 2.8rem;
  margin-bottom: 1.5rem;
  display: inline-block;
  color: var(--secondary);
}

.category-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: #fff;
}

.category-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.card-link {
  color: var(--secondary);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap 0.3s ease;
}

.card-link:hover {
  gap: 0.8rem;
  color: var(--primary);
}

/* === 特性区块 - 杂志风左右布局 === */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin: 5rem 0;
}

.feature-image {
  aspect-ratio: 4/3;
  background: linear-gradient(145deg, rgba(0, 240, 255, 0.08), rgba(255, 45, 85, 0.08));
  border-radius: 30px;
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 40% 40%, var(--secondary) 0%, transparent 40%),
              radial-gradient(circle at 60% 60%, var(--primary) 0%, transparent 40%);
  opacity: 0.2;
  animation: pulseGlow 5s ease-in-out infinite;
}

.feature-text {
  padding: 1rem 0;
}

.feature-text h3 {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 1rem;
  color: #fff;
  letter-spacing: -0.02em;
}

.feature-text p {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  padding: 0.6rem 0;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: 500;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.feature-list li::before {
  content: '◆';
  color: var(--secondary);
  font-size: 0.6rem;
}

/* === 数据统计 - 大胆数字排版 === */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  padding: 4rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  margin: 3rem 0;
}

.stat-item {
  text-align: center;
  padding: 1.5rem;
}

.stat-number {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.4rem;
}

.stat-label {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.05em;
}

/* === 内容墙 - 瀑布流解构 === */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.content-wall-item {
  background: var(--bg-card);
  border-radius: 20px;
  padding: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.04);
  transition: all 0.4s ease;
  position: relative;
}

.content-wall-item:nth-child(2n) {
  margin-top: 2rem;
}

.content-wall-item:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 240, 255, 0.1);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.content-wall-item h4 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: #fff;
}

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

/* === FAQ - 极简手风琴 === */
.faq-list {
  max-width: 800px;
  margin: 3rem auto 0;
}

.faq-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 1.2rem 0;
  cursor: pointer;
}

.faq-item summary {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  transition: color 0.3s ease;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.6rem;
  color: var(--secondary);
  transition: transform 0.4s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item:hover summary {
  color: var(--secondary);
}

.faq-answer {
  padding: 0.8rem 0 1.2rem;
  color: var(--text-muted);
  line-height: 1.8;
  font-size: 0.95rem;
}

/* === CTA横幅 === */
.cta-banner {
  background: linear-gradient(135deg, rgba(255, 45, 85, 0.08), rgba(0, 240, 255, 0.08));
  border-radius: 30px;
  padding: 4rem 3rem;
  text-align: center;
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
  margin: 4rem 0;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(0, 240, 255, 0.05) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, rgba(255, 45, 85, 0.05) 0%, transparent 50%);
  animation: pulseGlow 6s ease-in-out infinite;
}

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

.cta-banner p {
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto 2rem;
  position: relative;
  z-index: 1;
}

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

/* === 页脚 === */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding: 5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .logo {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

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

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1.2rem;
  letter-spacing: 0.05em;
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.4rem 0;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.footer-col a:hover {
  color: var(--secondary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

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

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

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

@keyframes pulseGlow {
  0%, 100% {
    opacity: 0.15;
    transform: scale(1);
  }
  50% {
    opacity: 0.25;
    transform: scale(1.05);
  }
}

/* === 响应式 === */
@media (max-width: 1024px) {
  .hero-image {
    width: 40%;
    height: 50%;
  }
  .feature-block {
    gap: 2rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1.2rem;
  }

  .header-inner {
    height: 64px;
    padding: 0 1.2rem;
  }

  .main-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
  }

  .main-nav.active {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }

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

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

  .hero-image {
    position: relative;
    right: auto;
    top: auto;
    transform: none;
    width: 100%;
    height: 300px;
    margin-top: 2rem;
  }

  .hero-content h1 {
    font-size: clamp(2.2rem, 10vw, 3.5rem);
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .feature-image {
    aspect-ratio: 16/9;
  }

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

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

  .content-wall-item:nth-child(2n) {
    margin-top: 0;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .cta-banner {
    padding: 3rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .section {
    padding: 60px 0;
  }

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

  .stat-number {
    font-size: 2.5rem;
  }
}