/* ==========================================================================
   layout.css - 顶部公告 / 导航 / 页脚 / 表单 / 区块布局
   ========================================================================== */

/* ====== 顶部公告条 ====== */
.topbar {
  position: relative;
  z-index: 1;
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.78);
  font-size: var(--text-xs);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: 8px;
  flex-wrap: wrap;
}
.topbar a {
  color: rgba(255, 255, 255, 0.78);
}
.topbar a:hover {
  color: #fff;
}
.topbar-meta {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}
.topbar-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.topbar-meta-item svg {
  width: 14px;
  height: 14px;
  opacity: 0.8;
}
.topbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

/* ====== 顶部导航 ====== */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(5, 8, 15, 0.72);
  backdrop-filter: saturate(160%) blur(18px);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out);
}
.header.is-scrolled {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  border-bottom-color: var(--color-border-strong);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 72px;
}

/* Logo */
.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: #fff;
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}
.logo:hover {
  color: #fff;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: transparent;
  box-shadow: none;
  flex-shrink: 0;
  overflow: visible;
}
.logo-mark img {
  width: 44px;
  height: 44px;
  object-fit: contain;
  filter: drop-shadow(0 0 10px rgba(30, 224, 255, 0.4));
}
.logo-mark svg {
  width: 24px;
  height: 24px;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-text strong {
  font-size: var(--text-lg);
  font-weight: 700;
}
.logo-text span {
  font-size: 11px;
  color: var(--color-text-tertiary);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* 主导航 */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 10px 16px;
  font-size: var(--text-base);
  font-weight: 500;
  color: rgba(232, 241, 255, 0.82);
  border-radius: var(--radius-md);
  transition: color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out);
}
.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}
.nav-link.is-active {
  color: var(--color-primary);
  font-weight: 600;
}
.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}
.nav-link svg {
  width: 14px;
  height: 14px;
  opacity: 0.6;
}

/* 下拉菜单 */
.nav-item {
  position: relative;
}
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 260px;
  background: #0e1728;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-3);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out),
    visibility var(--dur-base) var(--ease-out);
  z-index: var(--z-dropdown);
}
.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.dropdown-link {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: background var(--dur-fast) var(--ease-out);
}
.dropdown-link:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.dropdown-link .dropdown-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.dropdown-link .dropdown-icon svg {
  width: 20px;
  height: 20px;
}
.dropdown-link-title {
  font-weight: 600;
  font-size: var(--text-sm);
  margin-bottom: 2px;
}
.dropdown-link-desc {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

/* 头部右侧操作 */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  color: #fff;
}
.menu-toggle svg {
  width: 24px;
  height: 24px;
}

/* 移动端抽屉导航 */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: none;
}
.mobile-nav.is-open {
  display: block;
}
.mobile-nav-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(11, 27, 58, 0.5);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}
.mobile-nav.is-open .mobile-nav-backdrop {
  opacity: 1;
}
.mobile-nav-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(360px, 84vw);
  background: #07101c;
  box-shadow: var(--shadow-lg);
  padding: var(--space-5);
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--dur-slow) var(--ease-out);
  display: flex;
  flex-direction: column;
}
.mobile-nav.is-open .mobile-nav-panel {
  transform: translateX(0);
}
.mobile-nav-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}
.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px var(--space-3);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-md);
  border-bottom: 1px solid var(--color-divider);
}
.mobile-nav-link:hover,
.mobile-nav-link.is-active {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}
.mobile-nav-link svg {
  width: 18px;
  height: 18px;
  opacity: 0.5;
}
.mobile-nav-cta {
  margin-top: var(--space-6);
}

/* ====== 页脚 ====== */
.footer {
  position: relative;
  z-index: 1;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(30, 224, 255, 0.08), transparent 45%),
    var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding-top: var(--space-20);
  border-top: 1px solid var(--color-border);
}
.footer a {
  color: rgba(255, 255, 255, 0.7);
}
.footer a:hover {
  color: #fff;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1.3fr;
  gap: var(--space-10);
  padding-bottom: var(--space-16);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand .logo {
  color: #fff;
  margin-bottom: var(--space-5);
}
.footer-brand .logo-text strong {
  color: #fff;
}
.footer-brand .logo-text span {
  color: rgba(255, 255, 255, 0.5);
}
.footer-desc {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-5);
  max-width: 320px;
}
.footer-col-title {
  color: #fff;
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-5);
}
.footer-list li {
  margin-bottom: var(--space-3);
}
.footer-list a {
  font-size: var(--text-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--dur-fast) var(--ease-out);
}
.footer-list a:hover {
  gap: var(--space-2);
}
.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
}
.footer-contact-item svg {
  width: 18px;
  height: 18px;
  color: rgba(255, 255, 255, 0.6);
  flex-shrink: 0;
  margin-top: 2px;
}
.footer-contact-item strong {
  display: block;
  color: #fff;
  font-size: var(--text-lg);
  font-weight: 600;
  margin-top: 2px;
}
.footer-qr {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-5);
}
.footer-qr-item {
  text-align: center;
}
.footer-qr-img {
  width: 88px;
  height: 88px;
  border-radius: var(--radius-md);
  background: #fff;
  padding: 6px;
  margin-bottom: var(--space-2);
}
.footer-qr-item span {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.6);
}
.footer-bottom {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-6);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
  flex-wrap: wrap;
}
.footer-bottom-links {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
}
.footer-beian {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-beian-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
}
.footer-beian-link svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}
.footer-beian-link:hover {
  color: rgba(255, 255, 255, 0.85);
}

/* ====== 表单 ====== */
.form-group {
  margin-bottom: var(--space-5);
}
.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.form-label .required {
  color: var(--color-error);
  margin-left: 4px;
}
.form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-top: 6px;
}
.form-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: 6px;
  display: none;
}
.form-control {
  display: block;
  width: 100%;
  padding: 12px 14px;
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg-strong);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
  min-height: 44px;
}
.form-control::placeholder {
  color: var(--color-text-tertiary);
}
.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 224, 255, 0.18);
}
.form-control.has-error {
  border-color: var(--color-error);
}
.form-control.has-error:focus {
  box-shadow: 0 0 0 3px rgba(245, 34, 45, 0.15);
}
textarea.form-control {
  min-height: 120px;
  resize: vertical;
  line-height: var(--leading-normal);
}
select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%238a93a6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

/* ====== 面包屑 ====== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--color-text-secondary);
}
.breadcrumb a:hover {
  color: var(--color-primary);
}
.breadcrumb svg {
  width: 14px;
  height: 14px;
  opacity: 0.5;
}
.breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

/* ====== 页面横幅 ====== */
.page-hero {
  background:
    linear-gradient(180deg, rgba(5, 8, 15, 0.55) 0%, rgba(5, 8, 15, 0.82) 100%),
    url("../img/page-hero-bg.jpg") center / cover no-repeat;
  color: #fff;
  padding-block: var(--space-16) var(--space-20);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 8, 15, 0.55), transparent 55%),
    radial-gradient(circle at 80% 20%, rgba(30, 224, 255, 0.18) 0, transparent 40%);
  pointer-events: none;
}
.page-hero-inner {
  position: relative;
  z-index: 1;
}
.page-hero h1 {
  color: #fff;
  font-size: var(--text-4xl);
  margin-bottom: var(--space-4);
}
.page-hero p {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.85);
  max-width: 640px;
}
.page-hero .breadcrumb {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-6);
}
.page-hero .breadcrumb a,
.page-hero .breadcrumb-current {
  color: rgba(255, 255, 255, 0.85);
}
.page-hero .breadcrumb a:hover {
  color: #fff;
}

/* ====== 响应式：导航 ====== */
@media (max-width: 1024px) {
  .nav,
  .header-actions .btn:not(.btn-primary) {
    display: none;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .topbar-links {
    display: none;
  }
}

@media (max-width: 768px) {
  .topbar {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .footer-icp,
  .footer-beian {
    position: static;
    transform: none;
  }
  .footer-beian {
    justify-content: center;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}