/* ============================================
   星河入梦工作室 — 复用组件
   ============================================ */

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: var(--font-display);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wide);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-accent);
  color: #0a0e1a;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 25px var(--color-accent-glow);
}

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

.btn-outline:hover {
  background: var(--color-accent);
  color: #0a0e1a;
  transform: translateY(-1px);
  box-shadow: 0 8px 25px var(--color-accent-glow);
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

.btn-ghost:hover {
  border-color: var(--color-text-primary);
  color: var(--color-text-primary);
}

.btn-sm {
  padding: 8px 20px;
  font-size: var(--font-size-xs);
}

/* ===== 导航链接 ===== */
.nav-link {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-wider);
  color: var(--color-text-secondary);
  padding: 4px 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 100%;
  height: 1px;
  background: var(--color-accent);
  transition: transform var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* ===== 卡片 ===== */
.card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all var(--transition-smooth);
}

.card-glass {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: all var(--transition-smooth), transform 0.15s ease-out;
  transform-style: preserve-3d;
  perspective: 800px;
}

.card-glass:hover {
  transform: translateY(-8px);
  border-color: rgba(201, 168, 76, 0.4);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5),
              0 0 40px var(--color-accent-glow),
              inset 0 0 30px rgba(201, 168, 76, 0.03);
  background: rgba(255, 255, 255, 0.06);
}

/* ===== 价值卡片 ===== */
.value-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.value-card .value-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.value-card .value-title {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.value-card .value-desc {
  font-size: var(--font-size-small);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
}

/* ===== 服务卡片 ===== */
.service-card .service-icon {
  width: 40px;
  height: 40px;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.service-card .service-title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.service-card .service-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.service-card .service-item {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  padding-left: var(--space-sm);
  position: relative;
}

.service-card .service-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.6;
}

/* ===== Toast 提示 ===== */
.toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  border: 1px solid var(--color-accent-strong);
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-small);
  z-index: var(--z-toast);
  opacity: 0;
  transition: all var(--transition-smooth);
  pointer-events: none;
  backdrop-filter: blur(10px);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== 汉堡菜单按钮 ===== */
.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
  z-index: var(--z-menu);
  background: none;
  border: none;
  padding: 0;
}

.burger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.burger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.burger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: var(--z-overlay);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--color-accent);
  background: rgba(201, 168, 76, 0.1);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.back-to-top:hover svg {
  color: var(--color-accent);
}

/* ===== 导航栏 ===== */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  z-index: var(--z-nav);
  transition: all var(--transition-base);
}

.site-nav.scrolled {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

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

.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

/* ===== 页脚 ===== */
.site-footer {
  position: relative;
  z-index: var(--z-base);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-link {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-accent);
}

.copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}

.icp {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.icp .icp-logo {
  width: 14px;
  height: 14px;
  opacity: 0.5;
  flex-shrink: 0;
}

.icp a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.icp a:hover {
  color: var(--color-accent);
}