/** ============================================
 * COMPONENTS — Nicolo-Pro
 * 可复用组件：按钮 / 卡片 / 表单 / 横幅 / 面包屑 / 分页 / 通知 / 骨架屏
 * ============================================ */

/* ============================================
   按钮 .btn
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-body);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
  text-align: center;
  white-space: nowrap;
  user-select: none;
}

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

.btn:active {
  transform: translateY(0);
}

/* 主色：深蓝填充 */
.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

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

/* 线框：蓝色描边 */
.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--secondary:hover {
  background-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

/* 强调：暖金填充 */
.btn--accent {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.btn--accent:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}

/* 幽灵按钮 */
.btn--ghost {
  background-color: transparent;
  color: var(--color-text);
  border-color: transparent;
}

.btn--ghost:hover {
  background-color: var(--color-gray-100);
}

/* ============================================
   CTA 横幅（全局可用）
   ============================================ */
.cta-banner {
  background-color: var(--color-dark);
  padding: 72px 0;
  text-align: center;
  color: var(--color-white);
  margin-top: 16px;
}
.cta-banner__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--font-weight-bold);
  color: var(--color-white);
  line-height: var(--line-height-tight);
  margin-bottom: 10px;
}
.cta-banner__text {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  max-width: 520px;
  margin: 0 auto 28px;
  line-height: 1.7;
}
.cta-banner__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-banner .btn--white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-white);
  color: var(--color-dark);
  padding: 13px 32px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: background var(--transition-fast);
}
.cta-banner .btn--white:hover {
  background: var(--color-gray-100);
}

/* 白色按钮 */
.btn--white {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.btn--white:hover {
  background-color: var(--color-gray-100);
  box-shadow: var(--shadow-md);
}

/* 尺寸变体 */
.btn--sm {
  font-size: var(--text-small);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
}

.btn--lg {
  font-size: var(--text-h3);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-lg);
}

/* 通栏按钮 */
.btn--block {
  display: flex;
  width: 100%;
}

/* 禁用态 */
.btn:disabled,
.btn--disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* ============================================
   卡片 .card
   ============================================ */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card--hover:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

/* ── 卡片图片 ── */
.card__image {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-gray-100);
}

.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card--hover:hover .card__image img {
  transform: scale(1.03);
}

.card__image-placeholder {
  display: flex; align-items: center; justify-content: center;
  width: 100%; height: 100%;
  color: var(--color-text-muted); font-size: var(--text-small);
}

/* ── 卡片图文区 ── */
.card__link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.card__body {
  padding: 16px 18px 18px;
}

.card__title {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-heading);
  line-height: var(--line-height-tight);
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__text {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 12px;
  min-height: 0;
}

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-small);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
}

/* 深蓝角标 */
.card__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 10px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  background-color: var(--color-dark);
  border-radius: var(--radius-sm);
  line-height: 1.4;
}

/* 询价链接 */
.card__inquiry {
  display: inline-block;
  font-size: 12px;
  font-weight: var(--font-weight-medium);
  color: var(--color-accent-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.card__inquiry:hover { color: var(--color-accent-hover); }

/* 卡片暗色覆盖层（案例卡片用） */
.card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(27, 58, 92, 0.85) 0%,
    rgba(27, 58, 92, 0.3) 50%,
    rgba(27, 58, 92, 0.05) 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-6);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card--hover:hover .card__overlay {
  opacity: 1;
}

/* ============================================
   表单 .form-*
   ============================================ */
.form-input,
.form-textarea,
.form-select {
  display: block;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-body);
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  line-height: var(--line-height-normal);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(200, 150, 62, 0.2);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

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

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5l5 5 5-5' stroke='%23A8A295' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-10);
}

/* ── 表单标签 ── */
.form-label {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-heading);
  margin-bottom: var(--space-2);
}

.form-label--required::after {
  content: " *";
  color: var(--color-error);
}

/* ── 双列表单行 ── */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

/* ── 蜜罐字段（反垃圾）── */
.form-honeypot {
  position: absolute;
  left: -9999px;
  top: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  z-index: -1;
}

/* 表单验证错误 */
.form-input--error,
.form-textarea--error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
}
.form-input--error:focus,
.form-textarea--error:focus {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
}

.form-input--full {
  width: 100%;
}
.form-error {
  display: block;
  font-size: var(--text-micro);
  color: var(--color-error);
  margin-top: var(--space-1);
}

/* ── 提交成功中心提示 ── */
.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-12) var(--space-6);
}

.form-success::before {
  content: "";
  display: block;
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-6);
  background-color: var(--color-success);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='32' fill='none' viewBox='0 0 24 24'%3E%3Cpath d='M5 13l4 4L19 7' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

.form-success__title {
  font-family: var(--font-heading);
  font-size: var(--text-h2);
  font-weight: var(--font-weight-semibold);
  color: var(--color-heading);
  margin-bottom: var(--space-2);
}

.form-success__text {
  color: var(--color-text-secondary);
}

/* ============================================
   页面标题横幅 .page-header
   ============================================ */
.page-header {
  background-color: var(--color-dark);
  padding: 56px var(--container-padding);
  text-align: center;
  color: var(--color-white);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.page-header__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-3);
  color: var(--color-white);
}

.page-header__subtitle {
  font-size: var(--text-body);
  color: var(--color-gray-300);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   面包屑 .breadcrumb
   ============================================ */

/* 无障碍跳转链接 */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 9999;
  padding: 10px 20px;
  background: var(--color-dark);
  color: var(--color-white);
  font-size: 14px;
  text-decoration: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: 0;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  padding: 16px 0 0;
  margin-bottom: 24px;
  font-size: 12px;
  color: var(--color-text-muted);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb__item { display: inline-flex; align-items: center; }

.breadcrumb__item a { color: var(--color-text-muted); text-decoration: none; transition: color var(--transition-fast); }

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

.breadcrumb__separator { margin: 0 4px; color: var(--color-gray-300); user-select: none; }

.breadcrumb__item[aria-current="page"] { color: var(--color-text); font-weight: var(--font-weight-medium); }

/* Schema 标记元素 */
[itemprop="itemListElement"] {
  display: inline-flex;
  align-items: center;
}

/* ============================================
   作者信息框 .author-box
   ============================================ */
.author-box {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: var(--space-8);
  padding: 16px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.author-box__avatar { flex-shrink: 0; }
.author-box__avatar-img {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
}
.author-box__info { flex: 1; min-width: 0; }
.author-box__name {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 4px;
}
.author-box__name a {
  color: var(--color-heading);
  text-decoration: none;
}
.author-box__name a:hover { color: var(--color-primary); }
.author-box__bio {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 6px;
}
.author-box__share { flex-shrink: 0; }
.author-box__share .share-buttons { margin-top: 0; }
.author-box__meta {
  font-size: 12px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.author-box__meta a {
  color: var(--color-accent-text);
  text-decoration: none;
}
.author-box__meta a:hover { text-decoration: underline; }
.author-box__sep { color: var(--color-gray-300); }

/* ============================================
   分页 .pagination
   ============================================ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-8) 0;
}

.pagination__item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--space-2);
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.pagination__item:hover {
  background-color: var(--color-gray-100);
}

.pagination__item--active {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.pagination__item--active:hover {
  background-color: var(--color-accent-hover);
}

.pagination__item--disabled {
  opacity: 0.4;
  pointer-events: none;
}

.pagination__prev,
.pagination__next {
  font-weight: var(--font-weight-medium);
  gap: var(--space-1);
}

/* ============================================
   通知弹层 .toast
   ============================================ */
.toast {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  font-size: var(--text-small);
  color: var(--color-text);
  animation: toastIn 0.3s ease;
  max-width: 400px;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.toast--success {
  border-left: 4px solid var(--color-success);
}

.toast--error {
  border-left: 4px solid var(--color-error);
}

.toast--warning {
  border-left: 4px solid var(--color-warning);
}

.toast--info {
  border-left: 4px solid var(--color-info);
}

.toast__icon {
  flex-shrink: 0;
  font-size: var(--text-h3);
}

.toast__close {
  margin-left: auto;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-1);
}

.toast__close:hover {
  color: var(--color-text);
}

/* ============================================
   骨架屏 .skeleton
   ============================================ */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-100) 25%,
    var(--color-gray-200) 50%,
    var(--color-gray-100) 75%
  );
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeletonShimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.skeleton--text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton--title {
  height: 1.5em;
  width: 60%;
  margin-bottom: var(--space-4);
}

.skeleton--image {
  aspect-ratio: 4 / 3;
  width: 100%;
}

.skeleton--card {
  padding: var(--space-6);
}

.skeleton--avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.skeleton--button {
  height: 44px;
  width: 120px;
}

/* ============================================
   分享按钮 .share-buttons
   ============================================ */
.share-buttons {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: 10px;
}

.share-buttons__label {
  font-size: var(--text-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  margin-right: 4px;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-gray-100);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  position: relative;
}
.share-btn:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}
.share-btn svg {
  width: 16px;
  height: 16px;
}
.share-btn__qr {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  background: #fff;
  padding: 8px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}
.share-btn--wechat:hover .share-btn__qr { display: block; }

/* ============================================
   标签云 .tag-cloud
   ============================================ */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag-cloud__tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-4);
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  background-color: var(--color-gray-100);
  border-radius: var(--radius-full);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.tag-cloud__tag:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.tag-cloud__tag--active {
  background-color: var(--color-accent);
  color: var(--color-white);
}