/* =============================================
   抢庄牛牛棋牌平台 | 紫韵·博弈
   Awwwards-inspired Unique Design System
   独特视觉：紫罗兰 + 翡翠绿 + 暖金 + 珊瑚
   ============================================= */

/* --- 自定义属性 --- */
:root {
  /* 主色系 */
  --primary: #6C5CE7;
  --primary-light: #A29BFE;
  --primary-dark: #5A4BD1;
  --primary-gradient: linear-gradient(135deg, #6C5CE7 0%, #A29BFE 100%);
  --primary-glow: rgba(108, 92, 231, 0.25);

  /* 辅色系 */
  --secondary: #00B894;
  --secondary-light: #55EFC4;
  --secondary-dark: #00A381;

  /* 点缀色 */
  --accent-coral: #FF6B6B;
  --accent-gold: #FDCB6E;
  --accent-gold-light: #FFEAA7;

  /* 背景色 */
  --bg-main: #FAF8FF;
  --bg-alt: #F0EDFF;
  --bg-card: #FFFFFF;
  --bg-gradient: linear-gradient(180deg, #FAF8FF 0%, #F0EDFF 100%);

  /* 文字色 */
  --text-primary: #2D3436;
  --text-secondary: #636E72;
  --text-light: #B2BEC3;
  --text-on-primary: #FFFFFF;

  /* 边框 & 阴影 */
  --border-color: rgba(108, 92, 231, 0.12);
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(108, 92, 231, 0.08);
  --shadow-md: 0 8px 32px rgba(108, 92, 231, 0.12);
  --shadow-lg: 0 16px 48px rgba(108, 92, 231, 0.18);
  --shadow-glow: 0 0 40px rgba(108, 92, 231, 0.15);

  /* 排版 */
  --font-sans: system-ui, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-extrabold: 800;
  --weight-black: 900;

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* 过渡 */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* 字间距 */
  --tracking-tight: -0.02em;
  --tracking-normal: 0em;
  --tracking-wide: 0.04em;
  --tracking-wider: 0.08em;
}

/* --- 基础重置 --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-weight: var(--weight-regular);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-main);
  overflow-x: hidden;
  min-height: 100vh;
}

::selection {
  background: var(--primary);
  color: var(--text-on-primary);
}

/* --- 滚动条美化 --- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-alt);
}
::-webkit-scrollbar-thumb {
  background: var(--primary-light);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* --- 核心布局 --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

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

.section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(108,92,231,0.04) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.section:nth-child(even)::before {
  right: auto;
  left: -20%;
  background: radial-gradient(circle, rgba(0,184,148,0.04) 0%, transparent 70%);
}

/* --- 导航 --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(250, 248, 255, 0.92);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: var(--weight-bold);
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  transition: var(--transition-fast);
}

.logo:hover {
  color: var(--primary);
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: var(--primary-gradient);
  color: var(--text-on-primary);
  box-shadow: 0 4px 12px var(--primary-glow);
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '♢';
  font-size: 1.4rem;
  line-height: 1;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  transition: var(--transition-fast);
  position: relative;
  padding: 4px 0;
  letter-spacing: var(--tracking-wide);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-gradient);
  border-radius: 1px;
  transition: var(--transition-smooth);
}

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

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

.nav-cta {
  padding: 10px 24px !important;
  border-radius: 50px !important;
  color: var(--text-on-primary) !important;
  font-weight: var(--weight-semibold) !important;
  background: var(--primary-gradient);
  box-shadow: 0 4px 16px var(--primary-glow);
  transition: var(--transition-smooth) !important;
  letter-spacing: var(--tracking-wide) !important;
}

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

.nav-cta:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 28px var(--primary-glow) !important;
  color: var(--text-on-primary) !important;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg-alt);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary);
  transition: var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--border-color);
}

/* --- 首页 Hero --- */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  background: var(--bg-gradient);
  padding-top: 72px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(108,92,231,0.08) 0%, transparent 60%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,184,148,0.06) 0%, transparent 60%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  max-width: 620px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: rgba(108, 92, 231, 0.1);
  color: var(--primary);
  text-transform: uppercase;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(108, 92, 231, 0.1);
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: var(--weight-black);
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}

.hero h1 .text-accent {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  font-weight: var(--weight-regular);
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
  background: var(--primary-gradient);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image::before {
  content: '♢ ♡ ♧ ♤';
  font-size: 6rem;
  color: rgba(255,255,255,0.15);
  letter-spacing: 20px;
  line-height: 1;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  animation: floatSymbols 8s ease-in-out infinite;
}

@keyframes floatSymbols {
  0%, 100% { transform: translate(-50%, -50%) scale(1) rotate(0deg); opacity: 0.15; }
  50% { transform: translate(-50%, -50%) scale(1.1) rotate(3deg); opacity: 0.25; }
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
  mix-blend-mode: overlay;
}

/* 装饰菱形 */
.hero-diamond {
  position: absolute;
  width: 60px;
  height: 60px;
  border: 2px solid rgba(108, 92, 231, 0.1);
  transform: rotate(45deg);
  border-radius: 4px;
  pointer-events: none;
}

.hero-diamond:nth-child(1) {
  top: 15%;
  left: 8%;
  width: 40px;
  height: 40px;
  animation: diamondFloat 6s ease-in-out infinite;
}

.hero-diamond:nth-child(2) {
  bottom: 20%;
  right: 12%;
  width: 70px;
  height: 70px;
  border-color: rgba(0, 184, 148, 0.1);
  animation: diamondFloat 8s ease-in-out infinite reverse;
}

@keyframes diamondFloat {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50% { transform: rotate(45deg) translateY(-20px); }
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: var(--weight-semibold);
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: var(--transition-smooth);
  letter-spacing: var(--tracking-wide);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: var(--transition-smooth);
}

.btn:hover {
  transform: translateY(-3px);
}

.btn:active {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--primary-gradient);
  color: var(--text-on-primary);
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary::before {
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 100%);
}

.btn-primary:hover {
  box-shadow: 0 8px 32px var(--primary-glow);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline::before {
  background: var(--bg-alt);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 4px 20px rgba(108, 92, 231, 0.08);
}

.btn-outline:hover::before {
  opacity: 1;
}

.btn-outline .btn-icon {
  color: var(--primary);
}

.btn-icon {
  font-size: 1.1rem;
  transition: var(--transition-fast);
}

.btn:hover .btn-icon {
  transform: translateX(4px);
}

/* --- 标签/标题 --- */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  margin-bottom: 12px;
  color: var(--primary);
  padding: 4px 16px;
  border-radius: 50px;
  background: rgba(108, 92, 231, 0.08);
}

.section-title {
  font-size: 2.4rem;
  font-weight: var(--weight-black);
  margin-bottom: 16px;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  line-height: 1.2;
}

.section-title .text-accent {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  max-width: 600px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 48px;
}

/* --- 卡片网格 --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.category-card {
  background: var(--bg-card);
  border-radius: var(--border-radius-md);
  padding: 32px 28px;
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: var(--transition-smooth);
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.category-card:hover::before {
  opacity: 1;
}

.category-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(108,92,231,0.03) 0%, transparent 70%);
  pointer-events: none;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  background: var(--bg-alt);
  color: var(--primary);
  transition: var(--transition-smooth);
}

.category-card:hover .card-icon {
  background: var(--primary-gradient);
  color: var(--text-on-primary);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.category-card h3 {
  font-size: 1.2rem;
  font-weight: var(--weight-bold);
  margin-bottom: 8px;
  color: var(--text-primary);
}

.category-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-link {
  font-weight: var(--weight-semibold);
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
}

.card-link::after {
  content: '→';
  transition: var(--transition-fast);
}

.card-link:hover {
  gap: 10px;
}

.card-link:hover::after {
  transform: translateX(4px);
}

/* --- 特性块 --- */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-block.reverse {
  direction: rtl;
}

.feature-block.reverse > * {
  direction: ltr;
}

.feature-image {
  border-radius: var(--border-radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  position: relative;
  background: var(--bg-alt);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-image::before {
  content: '♢';
  font-size: 8rem;
  color: var(--primary-light);
  opacity: 0.2;
  position: absolute;
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.feature-image:hover img {
  transform: scale(1.03);
}

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

.feature-text .section-label {
  margin-bottom: 8px;
}

.feature-text .section-title {
  font-size: 2rem;
  margin-bottom: 20px;
}

.feature-text p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
  margin-top: 8px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: var(--weight-medium);
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li::before {
  content: '✦';
  font-weight: var(--weight-bold);
  color: var(--secondary);
  font-size: 1rem;
}

/* --- 数据条 --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 32px 24px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transition: var(--transition-smooth);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.stat-item:hover::before {
  transform: scaleX(1);
}

.stat-number {
  font-size: 2.6rem;
  font-weight: var(--weight-black);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  letter-spacing: var(--tracking-tight);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 8px;
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
}

/* --- 内容墙 --- */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: var(--border-radius-md);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
  position: relative;
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.content-wall-item:hover img {
  transform: scale(1.05);
}

.content-wall-body {
  padding: 24px;
}

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: var(--weight-bold);
  margin-bottom: 8px;
  color: var(--text-primary);
}

.content-wall-body p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.content-wall-body .card-link {
  font-size: 0.85rem;
}

.content-wall-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  padding: 4px 12px;
  border-radius: 50px;
  background: rgba(108, 92, 231, 0.08);
  color: var(--primary);
  margin-bottom: 12px;
  text-transform: uppercase;
}

/* --- FAQ --- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--bg-card);
  transition: var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: var(--weight-semibold);
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-primary);
  transition: var(--transition-fast);
  user-select: none;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: var(--weight-light);
  color: var(--primary);
  transition: var(--transition-smooth);
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
  color: var(--secondary);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- CTA 横幅 --- */
.cta-banner {
  padding: 72px 32px;
  text-align: center;
  border-radius: var(--border-radius-lg);
  background: var(--primary-gradient);
  color: var(--text-on-primary);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-banner::before {
  content: '♢ ♡ ♧ ♤';
  font-size: 10rem;
  color: rgba(255,255,255,0.05);
  letter-spacing: 40px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  pointer-events: none;
  line-height: 1;
}

.cta-banner::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 60%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner h2 {
  color: var(--text-on-primary) !important;
  font-size: 2.2rem;
  font-weight: var(--weight-black);
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
  letter-spacing: var(--tracking-tight);
}

.cta-banner p {
  color: rgba(255,255,255,0.85);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0 auto 32px;
  position: relative;
  z-index: 2;
  line-height: 1.7;
}

.cta-banner .btn-primary {
  background: var(--text-on-primary);
  color: var(--primary) !important;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

/* --- 页脚 --- */
.site-footer {
  padding: 72px 0 32px;
  background: var(--text-primary);
  color: rgba(255,255,255,0.8);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
}

.site-footer .container {
  position: relative;
  z-index: 2;
}

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

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand .logo {
  color: var(--text-on-primary);
  font-size: 1.3rem;
}

.footer-brand .logo .logo-icon {
  background: var(--primary-gradient);
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  opacity: 0.7;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-on-primary);
  margin-bottom: 20px;
  opacity: 0.9;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul a {
  text-decoration: none;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col ul a:hover {
  color: var(--accent-gold);
  transform: translateX(4px);
}

.footer-col ul a::before {
  content: '›';
  font-size: 1.2rem;
  line-height: 1;
  color: var(--primary-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  letter-spacing: var(--tracking-wide);
}

/* --- 工具类 --- */
.text-accent {
  color: var(--primary);
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 1rem;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* --- 背景装饰圆点 --- */
.bg-dots {
  background-image: radial-gradient(rgba(108,92,231,0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* --- 渐变分割线 --- */
.divider-gradient {
  height: 2px;
  background: var(--primary-gradient);
  border: none;
  margin: 40px 0;
  opacity: 0.3;
  border-radius: 1px;
}

/* --- 卡片内徽章 --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.badge-primary {
  background: rgba(108, 92, 231, 0.1);
  color: var(--primary);
}

.badge-secondary {
  background: rgba(0, 184, 148, 0.1);
  color: var(--secondary);
}

.badge-gold {
  background: rgba(253, 203, 110, 0.15);
  color: #B8860B;
}

/* --- 波浪装饰 --- */
.wave-decoration {
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 80px;
  pointer-events: none;
  fill: var(--bg-main);
}

/* --- 响应式：平板 --- */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
    order: 1;
  }

  .hero h1 {
    font-size: 2.6rem;
  }

  .hero p {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

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

  .hero-image {
    order: 0;
    max-width: 500px;
    margin: 0 auto;
    aspect-ratio: 4/3;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-block.reverse {
    direction: ltr;
  }

  .feature-image {
    max-width: 500px;
    margin: 0 auto;
  }

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

  .feature-text .section-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .feature-list li {
    justify-content: center;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .section-title {
    font-size: 2rem;
  }

  .cta-banner h2 {
    font-size: 1.8rem;
  }
}

/* --- 响应式：手机 --- */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
  }

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

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

  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(250, 248, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px 24px;
    flex-direction: column;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
  }

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

  .main-nav a {
    padding: 12px 16px;
    font-size: 1rem;
    width: 100%;
    border-radius: var(--border-radius-sm);
  }

  .main-nav a:hover {
    background: var(--bg-alt);
  }

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

  .nav-cta {
    margin-top: 8px;
    text-align: center;
    justify-content: center;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    min-height: 80vh;
    padding-top: 72px;
  }

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

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

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }

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

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .stat-item {
    padding: 24px 16px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .cta-banner {
    padding: 48px 20px;
  }

  .cta-banner h2 {
    font-size: 1.5rem;
  }

  .cta-banner p {
    font-size: 0.95rem;
  }

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

  .footer-brand {
    align-items: center;
  }

  .footer-brand p {
    max-width: 100%;
  }

  .footer-col ul {
    align-items: center;
  }

  .site-footer {
    padding: 48px 0 24px;
  }

  .content-wall-item img {
    height: 180px;
  }
}

/* --- 响应式：小手机 --- */
@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

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

  .hero-buttons {
    flex-direction: column;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .container {
    padding: 0 16px;
  }

  .header-inner {
    padding: 0 16px;
    height: 64px;
  }

  .category-card {
    padding: 24px 20px;
  }

  .content-wall-body {
    padding: 18px;
  }
}

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

.animate-in {
  animation: fadeInUp 0.6s ease-out forwards;
}

.animate-in-delay-1 { animation-delay: 0.1s; }
.animate-in-delay-2 { animation-delay: 0.2s; }
.animate-in-delay-3 { animation-delay: 0.3s; }

/* --- 选中高亮增强 --- */
::selection {
  background: var(--primary);
  color: var(--text-on-primary);
}

/* --- 打印样式 --- */
@media print {
  .site-header {
    position: relative;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--bg-main);
    border-bottom: 1px solid #ddd;
  }

  .hero {
    min-height: auto;
    padding: 40px 0;
  }

  .btn {
    border: 1px solid #999;
  }

  .category-card:hover,
  .content-wall-item:hover,
  .stat-item:hover {
    transform: none;
    box-shadow: none;
  }

  .cta-banner {
    background: #6C5CE7 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}