/* ==========================================================================
   components.css — 组件样式：导航栏 + 页脚 + 按钮 + 卡片 + 表单 + 面包屑 + 徽章 + 返回顶部 + Lightbox
   青岛青云之志科技有限公司官网
   ========================================================================== */

/* === 导航栏 Navbar === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--navbar-height);
  z-index: 1000;
  background: transparent;
  transition: background var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
}

.navbar--scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--navbar-height);
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-sm);
}

.navbar__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-white);
  transition: color var(--transition-base);
  letter-spacing: 1px;
}

.navbar--scrolled .navbar__logo {
  color: var(--color-primary);
}

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

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.navbar__link {
  font-size: var(--fs-body);
  font-weight: 500;
  color: var(--color-white);
  text-decoration: none;
  padding: var(--space-xs) 0;
  position: relative;
  transition: color var(--transition-base);
}

.navbar--scrolled .navbar__link {
  color: var(--color-text-dark);
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
}

.navbar__link:hover::after,
.navbar__link.is-active::after {
  width: 100%;
}

.navbar__link.is-active {
  color: var(--color-secondary) !important;
}

.navbar--scrolled .navbar__link.is-active {
  color: var(--color-primary) !important;
}

.navbar__link--cta {
  background: var(--gradient-primary);
  color: var(--color-white) !important;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-button);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.navbar__link--cta::after {
  display: none;
}

.navbar__link--cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(10, 92, 255, 0.4);
}

.navbar--scrolled .navbar__link--cta {
  color: var(--color-white) !important;
}

/* 汉堡菜单按钮 */
.navbar__toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.navbar__toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar--scrolled .navbar__toggle span {
  background-color: var(--color-text-dark);
}

.navbar__toggle.is-active span:nth-child(1) {
  transform: translateY(9.5px) rotate(45deg);
}

.navbar__toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.navbar__toggle.is-active span:nth-child(3) {
  transform: translateY(-9.5px) rotate(-45deg);
}

/* === 页脚 Footer === */
.footer {
  background-color: var(--color-bg-dark);
  color: var(--color-white);
  padding-top: var(--space-2xl);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: var(--space-xl);
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-sm) var(--space-xl);
}

.footer__col--brand {
  max-width: 400px;
}

.footer__logo {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.footer__desc {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.footer__links li {
  margin-bottom: var(--space-xs);
}

.footer__links a {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer__links a:hover {
  color: var(--color-secondary);
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-md) var(--space-sm);
  text-align: center;
}

.footer__bottom p {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.5);
  margin: 0;
}

.footer__bottom p + p {
  margin-top: var(--space-xs);
}

.footer__icp a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer__icp a:hover {
  color: rgba(255, 255, 255, 0.8);
}

/* === 按钮 Button === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--fs-body);
  font-weight: 600;
  font-family: var(--font-family);
  border: none;
  border-radius: var(--radius-button);
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), color var(--transition-base), border-color var(--transition-base);
  white-space: nowrap;
  line-height: 1.5;
}

.btn--primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(10, 92, 255, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(10, 92, 255, 0.4);
  color: var(--color-white);
}

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

.btn--outline:hover {
  transform: translateY(-2px);
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(10, 92, 255, 0.3);
}

.btn--white {
  background: var(--color-white);
  color: var(--color-primary);
}

.btn--white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  color: var(--color-primary);
}

.btn--outline-white {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn--outline-white:hover {
  transform: translateY(-2px);
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.btn--sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--fs-small);
}

.btn--lg {
  padding: var(--space-md) var(--space-xl);
  font-size: 18px;
}

.btn--block {
  width: 100%;
}

/* === 产品卡片 Product Card === */
.product-card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary);
}

.product-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-button);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: 24px;
  color: var(--color-white);
  flex-shrink: 0;
}

.product-card__title {
  font-size: var(--fs-card-title);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text-dark);
}

.product-card__desc {
  font-size: var(--fs-small);
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: var(--space-md);
  flex-grow: 1;
}

.product-card__tag {
  display: inline-block;
  font-size: var(--fs-small);
  color: var(--color-primary);
  background: rgba(10, 92, 255, 0.08);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 20px;
  margin-bottom: var(--space-md);
  align-self: flex-start;
}

.product-card__link {
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base), transform var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.product-card__link:hover {
  color: var(--color-secondary);
  transform: translateX(4px);
}

/* === 数据卡片 Data Card === */
.data-card {
  background: var(--color-bg-dark);
  border-radius: var(--radius-card);
  padding: var(--space-lg);
  text-align: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

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

.data-card__number {
  font-family: var(--font-family-number);
  font-size: var(--fs-data-number);
  font-weight: 700;
  color: var(--color-secondary);
  line-height: 1.2;
  margin-bottom: var(--space-xs);
}

.data-card__label {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.75);
}

/* === 表单 Form === */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-text-dark);
  margin-bottom: var(--space-xs);
}

.form-label .form-required {
  color: var(--color-error);
  margin-left: 2px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--fs-body);
  font-family: var(--font-family);
  color: var(--color-text-dark);
  background: var(--color-bg-light);
  border: 2px solid transparent;
  border-radius: var(--radius-input);
  transition: border-color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(10, 92, 255, 0.1);
}

.form-input--error,
.form-textarea--error {
  border-color: var(--color-error) !important;
  background: rgba(239, 68, 68, 0.04);
}

.form-input--error:focus,
.form-textarea--error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

.form-error {
  display: none;
  font-size: var(--fs-small);
  color: var(--color-error);
  margin-top: var(--space-xs);
}

.form-error.is-visible {
  display: block;
}

.form-success {
  display: none;
  padding: var(--space-lg);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-card);
  text-align: center;
}

.form-success.is-visible {
  display: block;
}

.form-success__icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-success);
  color: var(--color-white);
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-sm);
}

.form-success__title {
  font-size: var(--fs-card-title);
  font-weight: 600;
  color: var(--color-success);
  margin-bottom: var(--space-xs);
}

.form-success__desc {
  font-size: var(--fs-small);
  color: var(--color-text-light);
}

/* === 面包屑 Breadcrumb === */
.breadcrumb {
  padding: var(--space-md) 0;
  background: var(--color-bg-light);
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.breadcrumb__item a {
  font-size: var(--fs-small);
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

.breadcrumb__item--active {
  font-size: var(--fs-small);
  color: var(--color-text-dark);
  font-weight: 500;
}

.breadcrumb__separator {
  font-size: var(--fs-small);
  color: var(--color-text-light);
}

/* === 徽章 Badge === */
.badge {
  display: inline-block;
  font-size: var(--fs-small);
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: 20px;
  background: rgba(10, 92, 255, 0.08);
  color: var(--color-primary);
}

.badge--secondary {
  background: rgba(0, 212, 255, 0.1);
  color: var(--color-secondary);
}

.badge--success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
}

/* === 返回顶部 Back to Top === */
.back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity var(--transition-base), visibility var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
  z-index: 999;
  box-shadow: 0 4px 14px rgba(10, 92, 255, 0.3);
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(10, 92, 255, 0.4);
}

/* === Lightbox 遮罩 === */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
}

.lightbox.is-open {
  display: flex;
}

.lightbox__img {
  max-width: 90%;
  max-height: 85vh;
  border-radius: var(--radius-card);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox__close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base);
}

.lightbox__close:hover {
  background: rgba(255, 255, 255, 0.3);
}

.lightbox__caption {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-white);
  font-size: var(--fs-small);
  text-align: center;
  max-width: 80%;
}

/* === 通用卡片通用样式 === */
.card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  padding: var(--space-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

/* === 页面标题区 Page Header === */
.page-header {
  background: var(--gradient-dark);
  padding: calc(var(--navbar-height) + var(--space-2xl)) 0 var(--space-2xl);
  text-align: center;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.page-header__title {
  font-size: var(--fs-page-title);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.page-header__subtitle {
  font-size: var(--fs-body);
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto;
}

/* === 响应式 === */
@media (max-width: 1023px) {
  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }

  .footer__col--brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }
}

@media (max-width: 767px) {
  .navbar__nav {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    flex-direction: column;
    padding: var(--space-md);
    gap: var(--space-sm);
    transform: translateY(-150%);
    transition: transform var(--transition-base);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }

  .navbar__nav--open {
    transform: translateY(0);
  }

  .navbar__link {
    color: var(--color-text-dark) !important;
    width: 100%;
    text-align: center;
    padding: var(--space-sm) 0;
  }

  .navbar__link--cta {
    width: auto;
    display: inline-block;
    margin: var(--space-xs) auto;
  }

  .navbar__toggle {
    display: flex;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .back-to-top {
    bottom: var(--space-sm);
    right: var(--space-sm);
  }
}