/* ============================================
   YLCX 官网 - 全局样式
   设计方向: Editorial/Magazine 黑白灰极简
   配色: 深灰黑 + 白 + 灰 + 深蓝(按钮) + 红(爱心)
   字体: 系统默认字体栈
   ============================================ */

/* --- CSS Variables --- */
:root {
  --color-bg: #FFFFFF;
  --color-surface: #FFFFFF;
  --color-primary: #1A1A2E;
  --color-accent: #333333;
  --color-accent-hover: #1A1A2E;
  --color-text: #2D2D2D;
  --color-text-light: #666666;
  --color-muted: #777777;
  --color-border: #EEEEEE;
  --color-success: #4A7C59;
  --color-error: #C44536;

  --color-gray-dark: #333333;
  --color-gray: #666666;
  --color-gray-light: #999999;
  --color-button-bg: #092f9a;
  --color-button-hover: #07308c;
  --color-button-disabled: #6c8bcb;
  --color-like: #ff4d4f;

  --font-display: 'Times New Roman', Georgia, serif;
  --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-ui: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  --max-width: 1280px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 3px rgba(26, 26, 46, 0.06);
  --shadow-md: 0 4px 20px rgba(26, 26, 46, 0.08);
  --shadow-lg: 0 8px 40px rgba(26, 26, 46, 0.12);

  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* --- Reset --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  cursor: pointer;
  border: none;
  outline: none;
  font-family: var(--font-ui);
}

input, textarea {
  font-family: var(--font-body);
  outline: none;
}

/* --- Header & Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
}

.logo span {
  color: var(--color-gray-dark);
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  position: relative;
  padding: 6px 0;
  transition: var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

/* --- Main Content --- */
.main {
  padding-top: var(--header-height);
  min-height: 100vh;
}

/* --- Page Banner --- */
.page-banner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px 30px;
}

.banner-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

/* --- Page Hero (保留给 about/contact 等其他页面使用) --- */
.page-hero {
  padding: 80px 40px 60px;
  text-align: center;
}

.page-hero-label {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-gray);
  margin-bottom: 16px;
}

.page-hero-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-hero-desc {
  font-family: var(--font-body);
  font-size: 17px;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 20px auto 0;
  line-height: 1.8;
}

/* --- Category Filters --- */
.category-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px 30px;
}

.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

/* --- Cases Section --- */
.cases-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px 80px;
}

.category-btn {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-gray-dark);
  background: #F5F5F5;
  border: none;
  padding: 8px 20px;
  border-radius: 24px;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.category-btn:hover {
  background: #E0E0E0;
  color: var(--color-primary);
}

.category-btn.active {
  background: var(--color-primary);
  color: #FFFFFF;
  font-weight: 600;
}

/* --- Section --- */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px 80px;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 48px;
  flex-wrap: wrap;
  gap: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* --- Case Cards Grid --- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}

/* 统一对齐：所有卡片顶对齐，不再偏移 */

.case-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.case-card:hover {
  transform: translateY(-6px) !important;
  box-shadow: var(--shadow-lg);
}

.case-card-image {
  position: relative;
  width: 100%;
  padding-bottom: 75%;
  overflow: hidden;
  background: var(--color-border);
  flex-shrink: 0;
}

.case-card-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.case-card:hover .case-card-image img {
  transform: scale(1.05);
}

.case-card-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--color-primary);
  color: #fff;
  padding: 4px 12px;
  border-radius: 2px;
}

.case-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px 24px;
}

.case-card-title {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
  line-height: 1.3;
  /* 限制标题最多 2 行，避免长标题撑高卡片 */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.case-card-client {
  font-size: 11px;
  color: var(--color-muted);
  margin-bottom: 16px;
  line-height: 1.5;
}

.case-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.case-card-stats {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--color-muted);
}

.case-card-stats i.fa-heart {
  margin-right: 4px;
  color: var(--color-like);
}

.case-card-stats i:not(.fa-heart) {
  margin-right: 4px;
  color: var(--color-gray);
}

/* --- Loading / Error / Empty States --- */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-gray-dark);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  margin-top: 16px;
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--color-muted);
  letter-spacing: 0.04em;
}

.error-container,
.empty-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  text-align: center;
}

.error-icon,
.empty-icon {
  font-size: 48px;
  color: var(--color-muted);
  margin-bottom: 16px;
  opacity: 0.5;
}

.error-text,
.empty-text {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.btn-retry {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  background: var(--color-button-bg);
  padding: 10px 28px;
  border-radius: 2px;
  transition: var(--transition);
}

.btn-retry:hover {
  background: var(--color-button-hover);
}

.btn-retry:disabled {
  background: var(--color-button-disabled);
  cursor: not-allowed;
}

/* --- Detail Page Layout --- */
.detail-layout {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 40px 120px;
}

/* --- Detail Hero --- */
.detail-hero {
  margin-bottom: 48px;
  padding-top: 40px;
}

.detail-title {
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-muted);
}

.detail-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.detail-meta-item i.fa-heart {
  color: var(--color-like);
  font-size: 13px;
}

.detail-meta-item i:not(.fa-heart) {
  color: var(--color-gray-light);
  font-size: 13px;
}

.detail-cover {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 48px;
  box-shadow: var(--shadow-md);
  aspect-ratio: 16/9;
  background: var(--color-border);
}

.detail-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* --- Detail Section Title --- */
.detail-section-title {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-border);
  display: inline-block;
}

.detail-body {
  margin-bottom: 64px;
}

/* Rich text content styles */
.detail-content {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 2;
  color: var(--color-text);
}

.detail-content h2 {
  font-family: var(--font-body);
  font-size: 24px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 40px 0 20px;
  line-height: 1.3;
}

.detail-content h3 {
  font-family: var(--font-body);
  font-size: 20px;
  font-weight: 500;
  color: var(--color-primary);
  margin: 32px 0 16px;
  line-height: 1.4;
}

.detail-content p {
  margin-bottom: 16px;
  text-align: justify;
}

.detail-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
}

.detail-content ul,
.detail-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.detail-content ul {
  list-style: disc;
}

.detail-content ol {
  list-style: decimal;
}

.detail-content li {
  margin-bottom: 8px;
}

.detail-content blockquote {
  border-left: 3px solid var(--color-border);
  padding: 16px 24px;
  margin: 32px 0;
  background: #F5F5F5;
  font-style: italic;
  color: var(--color-text-light);
}

.detail-content a {
  color: var(--color-gray-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.text-muted {
  color: var(--color-muted);
  font-style: italic;
}

/* --- Detail Gallery（纵向列表，无点击交互） --- */
.detail-gallery {
  margin-bottom: 64px;
}

.gallery-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.gallery-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

/* --- About Page --- */
.about-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px 80px;
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
}

.about-content h2 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 48px 0 20px;
  line-height: 1.3;
}

.about-content h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  color: var(--color-primary);
  margin: 36px 0 16px;
}

.about-content p {
  font-size: 16px;
  line-height: 2;
  color: var(--color-text);
  margin-bottom: 16px;
  text-align: justify;
}

.about-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 24px 0;
}

.about-content ul,
.about-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.about-content ul {
  list-style: disc;
}

.about-content li {
  margin-bottom: 8px;
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin: 64px 0;
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 700;
  color: var(--color-gray-dark);
  line-height: 1.1;
}

.stat-label {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-top: 8px;
}

/* --- Contact Page --- */
.contact-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px 80px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.contact-info h3 {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  background: var(--color-surface);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.contact-info-icon i {
  font-size: 16px;
  color: var(--color-gray-dark);
}

.contact-info-text h4 {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.contact-info-text p {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--color-text);
  line-height: 1.6;
}

.contact-info-text a {
  color: var(--color-gray-dark);
  transition: var(--transition);
}

.contact-info-text a:hover {
  color: var(--color-primary);
}

/* Contact Form */
.contact-form-section h3 {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group label {
  display: block;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-muted);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 12px;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-gray-dark);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.08);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.btn-submit {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #fff;
  background: var(--color-button-bg);
  padding: 14px 36px;
  border-radius: 2px;
  transition: var(--transition);
  align-self: flex-start;
}

.btn-submit i {
  color: #fff;
}

.btn-submit:hover {
  background: var(--color-button-hover);
}

.btn-submit:hover i {
  color: #fff;
}

.btn-submit:disabled {
  background: var(--color-button-disabled);
  cursor: not-allowed;
}

.form-message {
  font-family: var(--font-ui);
  font-size: 13px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-top: 8px;
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(74, 124, 89, 0.1);
  color: var(--color-success);
}

.form-message.error {
  display: block;
  background: rgba(196, 69, 54, 0.1);
  color: var(--color-error);
}

/* --- Footer --- */
.footer {
  background: var(--color-primary);
  color: var(--color-gray-light);
  padding: 48px 40px 32px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: #fff;
}

.footer-brand span {
  color: var(--color-gray-light);
}

.footer-copy {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.icp-link {
  color: #999;
  text-decoration: none;
  margin-left: 20px;
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.icp-link:hover {
  text-decoration: underline;
}

/* --- Pagination --- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
}

.pagination-btn {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.pagination-btn:hover:not(:disabled) {
  color: var(--color-primary);
  border-color: var(--color-gray-dark);
}

.pagination-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.pagination-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  font-weight: 600;
}

.pagination-info {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--color-muted);
  padding: 0 12px;
}

/* --- Mobile Menu Overlay --- */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  height: calc(100vh - var(--header-height));
  background: #FFFFFF;
  z-index: 999;
  padding: 40px;
  flex-direction: column;
  gap: 24px;
  align-items: center;
  justify-content: center;
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav .nav-link {
  font-size: 16px;
}

/* --- Float Buttons (悬浮按钮组) --- */
.float-buttons {
  position: fixed;
  right: 24px;
  bottom: 32px;
  z-index: 1500;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.float-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(26, 26, 46, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, background 0.3s ease, opacity 0.3s ease;
  position: relative;
}

.float-btn:hover {
  transform: scale(1.1);
  background: rgba(26, 26, 46, 0.95);
}

.float-btn:active {
  transform: scale(0.95);
}

/* 返回顶部按钮默认隐藏 */
#btnScrollTop {
  opacity: 0;
  pointer-events: none;
  transform: scale(0.8);
}

#btnScrollTop.visible {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
}

/* 点赞数徽标 */
.float-btn-like-count {
  position: absolute;
  top: -6px;
  right: -6px;
  min-width: 20px;
  height: 20px;
  background: var(--color-like);
  color: #fff;
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 700;
  line-height: 20px;
  text-align: center;
  border-radius: 10px;
  padding: 0 5px;
}

/* 点赞按钮动画 */
#btnLike.liked {
  animation: heartBeat 0.4s ease;
}

#btnLike.liked i {
  color: var(--color-like);
}

@keyframes heartBeat {
  0% { transform: scale(1); }
  25% { transform: scale(1.3); }
  50% { transform: scale(0.9); }
  100% { transform: scale(1); }
}

/* --- Like Toast (+1 动画) --- */
.like-toast {
  position: fixed;
  right: 84px;
  bottom: 104px;
  z-index: 1501;
  font-family: var(--font-ui);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-like);
  opacity: 0;
  transform: translateY(0);
  pointer-events: none;
  transition: none;
}

.like-toast.show {
  animation: toastUp 0.8s ease forwards;
}

@keyframes toastUp {
  0% {
    opacity: 0;
    transform: translateY(0) scale(0.5);
  }
  30% {
    opacity: 1;
    transform: translateY(-20px) scale(1.1);
  }
  100% {
    opacity: 0;
    transform: translateY(-60px) scale(1);
  }
}

/* --- Service Float Buttons (客服 & 电话悬浮按钮) --- */
.service-float-buttons {
  position: fixed;
  right: 20px;
  bottom: 210px;
  z-index: 1490;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.service-float-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, background 0.3s ease, opacity 0.3s ease;
  text-decoration: none;
}

.service-float-btn:hover {
  transform: scale(1.12);
  background: var(--color-gray-dark);
}

.service-float-btn:active {
  transform: scale(0.92);
}

/* Service Toast */
.service-toast {
  position: fixed;
  bottom: 160px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  z-index: 1500;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  background: var(--color-primary);
  padding: 12px 24px;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  white-space: nowrap;
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .header-inner {
    padding: 0 20px;
  }

  .nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .page-banner {
    padding: 0 20px 24px;
  }

  .page-hero {
    padding: 60px 20px 40px;
  }

  .section {
    padding: 0 20px 60px;
  }

  .category-section {
    padding: 0 20px 24px;
  }

  .cases-section {
    padding: 0 20px 60px;
  }

  .cases-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .detail-layout,
  .about-layout,
  .contact-layout {
    padding: 0 20px 120px;
  }

  .detail-hero {
    padding-top: 24px;
    margin-bottom: 32px;
  }

  .detail-title {
    font-size: 16px;
  }

  .detail-meta {
    gap: 12px;
    font-size: 12px;
  }

  .detail-cover {
    border-radius: var(--radius-sm);
    margin-bottom: 32px;
  }

  .float-buttons {
    right: 16px;
    bottom: 24px;
    gap: 10px;
  }

  .float-btn {
    width: 42px;
    height: 42px;
    font-size: 16px;
  }

  .like-toast {
    right: 64px;
    bottom: 96px;
  }

  .service-float-buttons {
    right: 12px;
    bottom: 180px;
    gap: 10px;
  }

  .service-float-btn {
    width: 42px;
    height: 42px;
    font-size: 17px;
  }

  .service-toast {
    bottom: 140px;
    font-size: 13px;
    padding: 10px 20px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin: 40px 0;
    padding: 32px 0;
  }

  .stat-number {
    font-size: 32px;
  }

  .footer-inner {
    flex-direction: column;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    text-align: center;
  }

  .icp-link {
    margin-left: 0;
  }

  .section-header {
    flex-direction: column;
    gap: 8px;
  }
}