/* ===== 壹号平台 - 独有设计系统 ===== */
/* 视觉风格：解构野兽派 + 液态渐变 + 高对比杂志风 */
/* 非传统配色：深紫黑底 + 荧光青绿 + 霓虹玫红 + 金属金 */

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

:root {
  --bg-primary: #0a0a12;
  --bg-secondary: #12121e;
  --bg-card: #1a1a2e;
  --text-primary: #f0f0f8;
  --text-secondary: #a0a0c0;
  --accent-cyan: #00f0ff;
  --accent-magenta: #ff2d78;
  --accent-gold: #ffd700;
  --gradient-hero: linear-gradient(135deg, #0a0a12 0%, #1a0a2e 40%, #0a1a2e 100%);
  --gradient-card: linear-gradient(145deg, rgba(0,240,255,0.08), rgba(255,45,120,0.05));
  --glass-bg: rgba(255,255,255,0.03);
  --glass-border: rgba(0,240,255,0.15);
  --shadow-cyan: 0 0 30px rgba(0,240,255,0.15);
  --shadow-magenta: 0 0 30px rgba(255,45,120,0.1);
  --font-sans: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

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

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

/* ===== 容器 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
}

/* ===== 头部 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10,10,18,0.85);
  backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--glass-border);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.site-header:hover {
  background: rgba(10,10,18,0.95);
  border-bottom-color: var(--accent-cyan);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 2rem;
  max-width: 1280px;
  margin: 0 auto;
}

.logo {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
  -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: '®';
  font-size: 0.6rem;
  vertical-align: super;
  background: var(--accent-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-left: 2px;
}

.logo:hover {
  transform: scale(1.03) skewX(-2deg);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.main-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.5rem 1.2rem;
  border-radius: 100px;
  transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  letter-spacing: 0.3px;
}

.main-nav a::before {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--accent-cyan);
  transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.main-nav a:hover {
  color: var(--text-primary);
  background: rgba(0,240,255,0.06);
}

.main-nav a:hover::before {
  transform: translateX(-50%) scaleX(1);
}

.nav-cta {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta)) !important;
  color: var(--bg-primary) !important;
  font-weight: 700 !important;
  padding: 0.5rem 1.8rem !important;
  border-radius: 100px !important;
  box-shadow: var(--shadow-cyan);
  transition: all 0.35s ease !important;
}

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

.nav-cta:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 40px rgba(0,240,255,0.3);
  color: var(--bg-primary) !important;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

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

/* ===== 英雄区 ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--gradient-hero);
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(0,240,255,0.08), transparent 70%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 50%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(255,45,120,0.06), transparent 70%);
  animation: heroGlow2 10s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) scale(1); opacity: 0.6; }
  100% { transform: translate(30px, -30px) scale(1.1); opacity: 1; }
}

@keyframes heroGlow2 {
  0% { transform: translate(0, 0) scale(1); opacity: 0.4; }
  100% { transform: translate(-40px, 20px) scale(1.15); opacity: 0.8; }
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 4px;
  color: var(--accent-cyan);
  background: rgba(0,240,255,0.08);
  padding: 0.4rem 1.2rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(0,240,255,0.15);
  animation: fadeInUp 0.8s ease-out;
}

.hero-content h1 {
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease-out 0.1s both;
}

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

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero-image {
  position: absolute;
  right: -5%;
  top: 50%;
  transform: translateY(-50%);
  width: 45%;
  height: 60%;
  background: radial-gradient(ellipse at center, rgba(0,240,255,0.05), transparent 60%);
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.6;
  pointer-events: none;
}

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

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2.2rem;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.5px;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.btn:hover::after {
  opacity: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
  color: var(--bg-primary);
  box-shadow: var(--shadow-cyan);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 0 50px rgba(0,240,255,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(4px);
}

.btn-outline:hover {
  border-color: var(--accent-cyan);
  background: rgba(0,240,255,0.06);
  transform: translateY(-3px);
  box-shadow: 0 0 30px rgba(0,240,255,0.1);
}

/* ===== 通用区块 ===== */
.section {
  padding: 6rem 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--bg-secondary);
}

.section-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent-magenta);
  background: rgba(255,45,120,0.08);
  padding: 0.3rem 1rem;
  border-radius: 100px;
  margin-bottom: 1rem;
  border: 1px solid rgba(255,45,120,0.12);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  line-height: 1.15;
}

.section-title span {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.8;
  margin-bottom: 3rem;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.category-card {
  background: var(--gradient-card);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 2.5rem 2rem;
  transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-magenta));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}

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

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

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(0,240,255,0.12), rgba(255,45,120,0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.6rem;
  color: var(--accent-cyan);
  border: 1px solid rgba(0,240,255,0.1);
}

.category-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  letter-spacing: -0.01em;
}

.category-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.card-link {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap 0.3s ease;
}

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

/* ===== 特色区块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.feature-image {
  aspect-ratio: 4/3;
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(0,240,255,0.05), rgba(255,45,120,0.03));
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 40%, rgba(0,240,255,0.08), transparent 60%);
}

.feature-text h3 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

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

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

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

/* ===== 数据统计 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  padding: 3rem 0;
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

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

.stat-number {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.content-wall-item {
  background: var(--bg-card);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.04);
  transition: all 0.4s ease;
}

.content-wall-item:hover {
  transform: translateY(-4px);
  border-color: rgba(0,240,255,0.15);
  box-shadow: var(--shadow-cyan);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: linear-gradient(145deg, #1a1a2e, #2a2a3e);
}

.content-wall-body {
  padding: 1.5rem;
}

.content-wall-body h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.content-wall-body p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(0,240,255,0.1);
}

.faq-item summary {
  padding: 1.2rem 1.5rem;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  transition: background 0.3s ease;
}

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

.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent-cyan);
  transition: transform 0.3s ease;
}

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

.faq-item[open] summary {
  background: rgba(0,240,255,0.03);
}

.faq-answer {
  padding: 0 1.5rem 1.5rem;
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 0.9rem;
}

/* ===== CTA横幅 ===== */
.cta-banner {
  background: linear-gradient(135deg, rgba(0,240,255,0.04), rgba(255,45,120,0.04));
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 4rem 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 70%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(0,240,255,0.06), transparent 60%);
  animation: heroGlow 12s ease-in-out infinite alternate;
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  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 rgba(255,255,255,0.04);
  padding: 4rem 0 0;
}

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

.footer-brand .logo {
  font-size: 1.6rem;
  display: inline-block;
  margin-bottom: 1rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.8;
  max-width: 300px;
}

.footer-col h5 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  padding: 0.3rem 0;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.04);
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

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

.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: 2rem;
  }

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

  .hero-image {
    display: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
    padding: 0 1.2rem;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    flex-direction: column;
    background: rgba(10,10,18,0.98);
    backdrop-filter: blur(20px);
    padding: 1.5rem;
    gap: 0.5rem;
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-bottom: 1px solid var(--glass-border);
  }

  .main-nav.active {
    transform: translateY(0);
    opacity: 1;
  }

  .main-nav a {
    width: 100%;
    text-align: center;
    padding: 0.8rem;
    font-size: 1rem;
  }

  .main-nav a::before {
    display: none;
  }

  .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
  }

  .menu-toggle {
    display: flex;
  }

  .container {
    padding: 0 1.2rem;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero-content h1 {
    font-size: clamp(2rem, 10vw, 3.2rem);
  }

  .section {
    padding: 4rem 0;
  }

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

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

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

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

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

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

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

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

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

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

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

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

  .feature-block {
    gap: 1.5rem;
  }

  .cta-banner h2 {
    font-size: 1.6rem;
  }
}

/* ===== 微交互 ===== */
@media (hover: hover) {
  .category-card {
    transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  }

  .btn {
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  }
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--accent-cyan), var(--accent-magenta));
  border-radius: 3px;
}

::selection {
  background: var(--accent-magenta);
  color: var(--bg-primary);
}