/**
 * 社会人士避难所 3.0 - 布局系统
 * Liquid Glass 液态玻璃风格
 */

/* ==================== 页面布局 ==================== */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ==================== 主内容区 ==================== */
.main-container {
  flex: 1;
  padding: calc(100px + var(--space-xl)) var(--space-lg) var(--space-xl);
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* ==================== 服务网格布局 - 5个服务 ==================== */
.services-layout {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 220px);
  gap: var(--space-lg);
  max-width: 1200px;
  margin: 0 auto;
}

/* 下载站 - 大卡片，占据左上2x2区域 */
.service-download {
  grid-column: 1 / 3;
  grid-row: 1 / 3;
}

/* 大模型 - 右上 */
.service-llm {
  grid-column: 3 / 4;
  grid-row: 1 / 2;
}

/* 文件快递柜 - 右中 */
.service-express {
  grid-column: 4 / 5;
  grid-row: 1 / 2;
}

/* 分组工具 - 左下 */
.service-group {
  grid-column: 3 / 4;
  grid-row: 2 / 3;
}

/* 内网连接器 - 右下 */
.service-vpn {
  grid-column: 4 / 5;
  grid-row: 2 / 3;
}

/* ==================== 关于页面布局 - 简化版 ==================== */
.about-layout {
  max-width: 1200px;
  margin: 0 auto;
}

.about-section {
  margin-bottom: var(--space-xl);
}

.about-card {
  position: relative;
  overflow: hidden;
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(255, 255, 255, 0.7) 0%,
      rgba(230, 245, 255, 0.5) 50%,
      rgba(200, 230, 250, 0.4) 100%
    );
  backdrop-filter: 
    blur(var(--glass-blur))
    saturate(var(--glass-saturate))
    brightness(var(--glass-brightness));
  -webkit-backdrop-filter: 
    blur(var(--glass-blur))
    saturate(var(--glass-saturate))
    brightness(var(--glass-brightness));
  border-top: 1px solid var(--glass-border-top);
  border-left: 1px solid var(--glass-border-left);
  border-right: 1px solid var(--glass-border-right);
  border-bottom: 1px solid var(--glass-border-bottom);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  padding: var(--space-xl);
  transition: all var(--transition-spring);
  
  /* 动态光泽变量 */
  --mouse-x: 50%;
  --mouse-y: 20%;
}

.about-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 1;
  border-radius: inherit;
}

.about-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--mouse-x) var(--mouse-y),
    rgba(255, 255, 255, 0.5) 0%,
    rgba(255, 255, 255, 0.2) 30%,
    rgba(255, 255, 255, 0.08) 50%,
    transparent 70%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 2;
  border-radius: inherit;
}

.about-card:hover::after {
  opacity: 1;
}

/* 夜间模式关于卡片背景 */
[data-theme="dark"] .about-card {
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(45, 55, 75, 0.6) 0%,
      rgba(35, 45, 65, 0.45) 50%,
      rgba(30, 40, 58, 0.4) 100%
    );
}

[data-theme="dark"] .about-card::after {
  background: radial-gradient(
    circle at var(--mouse-x) var(--mouse-y),
    rgba(92, 209, 229, 0.2) 0%,
    rgba(92, 209, 229, 0.08) 30%,
    rgba(92, 209, 229, 0.03) 50%,
    transparent 70%
  );
}

[data-theme="dark"] .about-card:hover {
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(55, 68, 95, 0.75) 0%,
      rgba(45, 58, 82, 0.6) 50%,
      rgba(38, 50, 72, 0.5) 100%
    );
}

.about-card:hover {
  transform: translateY(-6px) scale(1.01);
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(255, 255, 255, 0.9) 0%,
      rgba(240, 250, 255, 0.7) 50%,
      rgba(220, 240, 255, 0.55) 100%
    );
  box-shadow: var(--glass-shadow-hover);
}

.about-card-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.75rem;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  font-weight: 700;
}

.about-card-title i {
  font-size: 2rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.about-card-content {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1.0625rem;
}

.about-card-content p {
  margin-bottom: var(--space-md);
}

.about-card-content strong {
  color: var(--accent-primary);
  font-weight: 600;
}

/* ==================== 联系方式网格 - 三等分布局 ==================== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.contact-item {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg) calc(var(--space-lg) + 30px) var(--space-lg) calc(var(--space-lg) + 15px);
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(255, 255, 255, 0.65) 0%,
      rgba(225, 242, 255, 0.45) 100%
    );
  backdrop-filter: 
    blur(var(--glass-blur))
    saturate(var(--glass-saturate))
    brightness(var(--glass-brightness));
  -webkit-backdrop-filter: 
    blur(var(--glass-blur))
    saturate(var(--glass-saturate))
    brightness(var(--glass-brightness));
  border-top: 1px solid var(--glass-border-top);
  border-left: 1px solid var(--glass-border-left);
  border-right: 1px solid var(--glass-border-right);
  border-bottom: 1px solid var(--glass-border-bottom);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-spring);
  text-decoration: none;
  color: inherit;
  min-height: 120px;
  /* 梯形裁剪 - 与主页卡片统一 */
  clip-path: polygon(
    10% 0%,
    100% 0%,
    90% 100%,
    0% 100%
  );
  
  /* 动态光泽变量 */
  --mouse-x: 50%;
  --mouse-y: 30%;
}

.contact-item:hover {
  transform: translateY(-6px) scale(1.02);
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(255, 255, 255, 0.85) 0%,
      rgba(235, 248, 255, 0.6) 100%
    );
  box-shadow: var(--glass-shadow-hover);
  border-color: var(--glass-border-top);
}

/* 夜间模式联系卡片 */
[data-theme="dark"] .contact-item {
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(45, 55, 75, 0.55) 0%,
      rgba(35, 45, 65, 0.4) 100%
    );
}

[data-theme="dark"] .contact-item:hover {
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(55, 68, 95, 0.7) 0%,
      rgba(45, 58, 82, 0.55) 100%
    );
}

.contact-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: var(--text-on-accent);
  font-size: 1.5rem;
  flex-shrink: 0;
}

.contact-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 0.25rem;
}

.contact-info h4 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin: 0;
  font-weight: 600;
  white-space: nowrap;
}

.contact-info p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin: 0;
  white-space: nowrap;
}

/* ==================== 页脚 - 简化版 ==================== */
.footer {
  padding: var(--space-xl) var(--space-lg);
  margin-top: auto;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* 首页页脚 - 分栏玻璃卡片 */
.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.footer-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(255, 255, 255, 0.6) 0%,
      rgba(220, 240, 255, 0.4) 100%
    );
  backdrop-filter: 
    blur(var(--glass-blur))
    saturate(var(--glass-saturate))
    brightness(var(--glass-brightness));
  -webkit-backdrop-filter: 
    blur(var(--glass-blur))
    saturate(var(--glass-saturate))
    brightness(var(--glass-brightness));
  border-top: 1px solid var(--glass-border-top);
  border-left: 1px solid var(--glass-border-left);
  border-right: 1px solid var(--glass-border-right);
  border-bottom: 1px solid var(--glass-border-bottom);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-spring);
  clip-path: polygon(
    10% 0%,
    100% 0%,
    90% 100%,
    0% 100%
  );
  text-decoration: none;
  color: inherit;
  
  /* 动态光泽变量 */
  --mouse-x: 50%;
  --mouse-y: 30%;
}

.footer-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 1;
  border-radius: inherit;
}

.footer-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--mouse-x) var(--mouse-y),
    rgba(255, 255, 255, 0.5) 0%,
    rgba(255, 255, 255, 0.2) 30%,
    rgba(255, 255, 255, 0.08) 50%,
    transparent 70%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 2;
  border-radius: inherit;
}

.footer-card:hover::after {
  opacity: 1;
}

/* 夜间模式页脚卡片背景 */
[data-theme="dark"] .footer-card {
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(45, 55, 75, 0.5) 0%,
      rgba(35, 45, 65, 0.35) 100%
    );
}

[data-theme="dark"] .footer-card::after {
  background: radial-gradient(
    circle at var(--mouse-x) var(--mouse-y),
    rgba(92, 209, 229, 0.2) 0%,
    rgba(92, 209, 229, 0.08) 30%,
    rgba(92, 209, 229, 0.03) 50%,
    transparent 70%
  );
}

[data-theme="dark"] a.footer-card:hover,
[data-theme="dark"] .footer-card:hover {
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(55, 68, 95, 0.7) 0%,
      rgba(45, 58, 82, 0.5) 100%
    );
}

a.footer-card:hover {
  transform: translateY(-6px) scale(1.02);
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(255, 255, 255, 0.8) 0%,
      rgba(230, 245, 255, 0.55) 100%
    );
  box-shadow: var(--glass-shadow-hover);
  border-color: var(--glass-border-top);
}

.footer-card:hover {
  transform: translateY(-6px) scale(1.02);
  background: 
    var(--glass-shine),
    linear-gradient(
      165deg,
      rgba(255, 255, 255, 0.8) 0%,
      rgba(230, 245, 255, 0.55) 100%
    );
  box-shadow: var(--glass-shadow-hover);
}

.footer-card-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: var(--text-on-accent);
  font-size: 1.35rem;
  margin-bottom: var(--space-md);
}

.footer-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.footer-card-content {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.footer-card-content a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.footer-card-content a:hover {
  color: var(--accent-primary);
}

/* 简化页脚样式（用于关于我们页面） */
.footer-simple {
  text-align: center;
  padding: var(--space-lg) 0;
}

.footer-beian {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
  font-size: 0.85rem;
}

.footer-beian a {
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.footer-beian a:hover {
  color: var(--accent-primary);
  background: var(--glass-bg);
}

.footer-separator {
  color: var(--text-muted);
  opacity: 0.5;
}

.footer-copyright-text {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--space-xs);
}

.cdn-info {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.cdn-info a {
  color: var(--accent-primary);
}

/* ==================== 404 页面 ==================== */
.error-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: var(--space-xl);
}

.error-code {
  font-size: clamp(6rem, 15vw, 12rem);
  font-weight: 900;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: var(--space-md);
  opacity: 0.8;
}

.error-title {
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  font-weight: 700;
}

.error-message {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 400px;
}

.error-actions {
  display: flex;
  gap: var(--space-md);
}