:root {
  --primary: #e94560;
  --primary-dark: #c62a47;
  --secondary: #1a1a2e;
  --accent: #f5c542;
  --bg: #fefefe;
  --surface: #f8f9fc;
  --text: #1e1e2f;
  --text-light: #5a5a72;
  --border: #e4e6ef;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 20px 48px rgba(0, 0, 0, 0.12);
  --radius: 16px;
  --radius-sm: 10px;
  --max-width: 1200px;
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.35);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition), color var(--transition);
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

::selection {
  background: var(--primary);
  color: #fff;
}

/* ===== 暗黑模式 ===== */
body.dark-mode {
  --bg: #12121c;
  --surface: #1c1c2a;
  --text: #e8e8f0;
  --text-light: #a0a0b8;
  --border: #2e2e42;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 20px 48px rgba(0, 0, 0, 0.6);
  --glass-bg: rgba(28, 28, 42, 0.72);
  --glass-border: rgba(255, 255, 255, 0.08);
}

/* ===== 容器 ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 导航栏 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition),
    box-shadow var(--transition);
}

.navbar:hover {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -0.5px;
  transition: transform var(--transition);
}

.logo:hover {
  transform: scale(1.03);
  color: var(--text);
}

.logo svg {
  width: 36px;
  height: 36px;
  transition: transform var(--transition);
}

.logo:hover svg {
  transform: rotate(-6deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  color: var(--text-light);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 6px 0;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width var(--transition);
}

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

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ===== 搜索框 ===== */
.search-box {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 4px 6px 4px 16px;
  transition: border-color var(--transition), box-shadow var(--transition),
    background var(--transition);
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.12);
  background: var(--bg);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.88rem;
  color: var(--text);
  width: 140px;
  padding: 6px 0;
}

.search-box input::placeholder {
  color: var(--text-light);
}

.search-box button {
  background: var(--primary);
  border: none;
  border-radius: 40px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
}

.search-box button:hover {
  background: var(--primary-dark);
  transform: scale(1.08);
}

.search-box button svg {
  width: 16px;
  height: 16px;
  stroke: #fff;
  fill: none;
  stroke-width: 2;
}

/* ===== 主题切换 / 菜单按钮 ===== */
.theme-toggle,
.menu-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition),
    transform var(--transition);
}

.theme-toggle:hover,
.menu-toggle:hover {
  background: var(--border);
  transform: scale(1.08);
}

.theme-toggle:active,
.menu-toggle:active {
  transform: scale(0.95);
}

.theme-toggle svg,
.menu-toggle svg {
  width: 20px;
  height: 20px;
  stroke: var(--text);
  fill: none;
  stroke-width: 1.8;
  transition: transform var(--transition);
}

.theme-toggle:hover svg {
  transform: rotate(20deg);
}

.menu-toggle {
  display: none;
}

/* ===== 移动菜单 ===== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 20px;
  z-index: 999;
  box-shadow: var(--shadow);
  animation: slideDown 0.3s ease;
}

.mobile-menu.open {
  display: block;
}

.mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu a {
  display: block;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-weight: 500;
  transition: background var(--transition), transform var(--transition);
}

.mobile-menu a:hover {
  background: var(--surface);
  transform: translateX(4px);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--text-light);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--border);
}

.breadcrumb a {
  color: var(--text-light);
}

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

.breadcrumb [aria-current="page"] {
  color: var(--text);
  font-weight: 500;
}

/* ===== Banner 轮播 ===== */
.banner {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  margin: 8px 0 32px;
  background: var(--secondary);
  min-height: 320px;
  box-shadow: var(--shadow);
}

.banner-slides {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.banner-slide {
  min-width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 32px;
  color: #fff;
  text-align: center;
  position: relative;
}

.banner-slide::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 30% 40%,
    rgba(255, 255, 255, 0.08),
    transparent 60%
  );
  pointer-events: none;
}

.banner-slide .banner-content {
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.banner-slide h2 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

.banner-slide p {
  font-size: 1rem;
  opacity: 0.88;
  margin-bottom: 20px;
  line-height: 1.7;
}

.banner-slide .btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 10px 28px;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.92rem;
  transition: background var(--transition), transform var(--transition),
    box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(233, 69, 96, 0.3);
}

.banner-slide .btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(233, 69, 96, 0.45);
  color: #fff;
}

.banner-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 2;
}

.banner-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.4);
  transition: background var(--transition), width var(--transition);
}

.banner-dots button.active {
  background: #fff;
  width: 28px;
  border-radius: 6px;
}

.banner-dots button:hover {
  background: rgba(255, 255, 255, 0.7);
}

/* ===== 数字动画区 ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 32px 0 48px;
}

.stat-item {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-top: 6px;
}

/* ===== 章节通用 ===== */
section {
  margin-bottom: 56px;
}

.section-header {
  margin-bottom: 28px;
}

.section-header h2 {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  color: var(--text);
}

.section-header p {
  color: var(--text-light);
  font-size: 0.95rem;
  max-width: 700px;
}

.section-header .accent-line {
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  margin-bottom: 16px;
}

/* ===== 卡片网格 ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.card:hover::before {
  transform: scaleX(1);
}

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

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(233, 69, 96, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: transform var(--transition), background var(--transition);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(-4deg);
  background: rgba(233, 69, 96, 0.18);
}

.card-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 1.8;
}

.card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.7;
}

.card ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
}

.card ul a {
  font-size: 0.9rem;
  color: var(--text-light);
  transition: color var(--transition), padding-left var(--transition);
  display: inline-block;
}

.card ul a:hover {
  color: var(--primary);
  padding-left: 4px;
}

/* ===== 文章列表 ===== */
.article-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.article-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
  display: flex;
  flex-direction: column;
}

.article-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 10px;
}

.article-meta .tag {
  background: rgba(233, 69, 96, 0.1);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.75rem;
  transition: background var(--transition), color var(--transition);
}

.article-item:hover .article-meta .tag {
  background: var(--primary);
  color: #fff;
}

.article-item h3 {
  font-size: 1.02rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
  line-height: 1.5;
  transition: color var(--transition);
}

.article-item:hover h3 {
  color: var(--primary);
}

.article-item p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
  flex: 1;
}

.article-item .read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
}

.article-item .read-more svg {
  width: 14px;
  height: 14px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 2;
  transition: transform var(--transition);
}

.article-item .read-more:hover svg {
  transform: translateX(4px);
}

/* ===== FAQ ===== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item.open {
  border-color: var(--primary);
  box-shadow: 0 4px 20px rgba(233, 69, 96, 0.1);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  background: transparent;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  gap: 16px;
  transition: background var(--transition);
  line-height: 1.5;
}

.faq-question:hover {
  background: rgba(233, 69, 96, 0.04);
}

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.faq-question .faq-icon::before,
.faq-question .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--primary);
  border-radius: 2px;
  transition: transform var(--transition);
}

.faq-question .faq-icon::before {
  width: 12px;
  height: 2px;
}

.faq-question .faq-icon::after {
  width: 2px;
  height: 12px;
}

.faq-item.open .faq-question .faq-icon::after {
  transform: rotate(90deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 22px;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 22px 20px;
}

.faq-answer p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.8;
}

/* ===== HowTo ===== */
.howto-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.howto-step {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  position: relative;
  transition: transform var(--transition);
}

.howto-step:hover {
  transform: translateX(4px);
}

.howto-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 56px;
  bottom: -8px;
  width: 2px;
  background: var(--border);
}

.howto-step-number {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 12px rgba(233, 69, 96, 0.3);
  transition: transform var(--transition), box-shadow var(--transition);
}

.howto-step:hover .howto-step-number {
  transform: scale(1.12);
  box-shadow: 0 6px 20px rgba(233, 69, 96, 0.45);
}

.howto-step-content h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}

.howto-step-content p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.75;
}

/* ===== 客户评价 ===== */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.testimonial {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

.testimonial:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.testimonial .quote-mark {
  font-size: 3rem;
  color: var(--primary);
  opacity: 0.2;
  line-height: 1;
  margin-bottom: 4px;
  font-family: Georgia, serif;
  transition: opacity var(--transition);
}

.testimonial:hover .quote-mark {
  opacity: 0.4;
}

.testimonial p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 16px;
}

.testimonial .author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial .author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.testimonial:hover .author-avatar {
  transform: scale(1.1);
}

.testimonial .author-info {
  display: flex;
  flex-direction: column;
}

.testimonial .author-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
}

.testimonial .author-title {
  font-size: 0.78rem;
  color: var(--text-light);
}

/* ===== 新闻中心 ===== */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), padding-left var(--transition);
}

.news-item:hover {
  background: var(--surface);
  padding-left: 8px;
  border-radius: var(--radius-sm);
}

.news-item:first-child {
  padding-top: 0;
}

.news-item:last-child {
  border-bottom: none;
}

.news-date {
  flex-shrink: 0;
  width: 80px;
  text-align: center;
}

.news-date .day {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  display: block;
}

.news-date .year-month {
  font-size: 0.78rem;
  color: var(--text-light);
}

.news-content h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
  transition: color var(--transition);
}

.news-item:hover .news-content h4 {
  color: var(--primary);
}

.news-content p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

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

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: transform var(--transition);
}

.contact-item:hover {
  transform: translateX(4px);
}

.contact-item .contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(233, 69, 96, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition), transform var(--transition);
}

.contact-item:hover .contact-icon {
  background: var(--primary);
  transform: scale(1.08);
}

.contact-item .contact-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--primary);
  fill: none;
  stroke-width: 1.8;
  transition: stroke var(--transition);
}

.contact-item:hover .contact-icon svg {
  stroke: #fff;
}

.contact-item h4 {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--text);
}

.contact-item p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.6;
}

.contact-map {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.contact-map:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.contact-map svg {
  width: 100%;
  height: 100%;
}

/* ===== 页脚 ===== */
footer {
  background: var(--secondary);
  color: rgba(255, 255, 255, 0.7);
  padding: 48px 0 24px;
  margin-top: auto;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
}

footer .footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

footer h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 14px;
}

footer p,
footer li {
  font-size: 0.85rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
}

footer ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

footer a {
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition), padding-left var(--transition);
  display: inline-block;
}

footer a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a:hover {
  color: #fff;
  padding-left: 0;
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(233, 69, 96, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--transition), visibility var(--transition),
    transform var(--transition), background var(--transition),
    box-shadow var(--transition);
  z-index: 900;
}

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

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(233, 69, 96, 0.55);
}

.back-to-top:active {
  transform: translateY(-2px) scale(0.96);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  stroke: #fff;
  fill: none;
  stroke-width: 2.5;
}

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  footer .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .search-box {
    display: none;
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .article-list {
    grid-template-columns: 1fr;
  }
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .banner {
    min-height: 260px;
  }
  .banner-slide {
    padding: 32px 20px;
  }
  footer .footer-grid {
    grid-template-columns: 1fr;
  }
  .howto-step:not(:last-child)::before {
    display: none;
  }
  .card:hover {
    transform: translateY(-2px);
  }
  .article-item:hover {
    transform: translateY(-2px);
  }
  .testimonial:hover {
    transform: translateY(-2px);
  }
}

@media (max-width: 480px) {
  .stats {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .stat-item {
    padding: 20px 12px;
  }
  .stat-number {
    font-size: 1.5rem;
  }
  .container {
    padding: 0 16px;
  }
  .news-item {
    flex-direction: column;
    gap: 8px;
  }
  .news-date {
    width: auto;
    text-align: left;
    display: flex;
    align-items: baseline;
    gap: 6px;
  }
  .news-date .day {
    font-size: 1.2rem;
  }
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
  .card {
    padding: 22px 18px;
  }
  .article-item {
    padding: 20px 18px;
  }
  .faq-question {
    padding: 16px 18px;
    font-size: 0.9rem;
  }
  .faq-answer {
    padding: 0 18px;
  }
  .faq-item.open .faq-answer {
    padding: 0 18px 18px;
  }
}

/* ===== 打印 ===== */
@media print {
  .navbar,
  .back-to-top,
  .banner-dots,
  .theme-toggle,
  .menu-toggle,
  .mobile-menu {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .card,
  .article-item,
  .faq-item {
    border: 1px solid #ccc;
    box-shadow: none;
  }
  .banner {
    min-height: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== 减少动画偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== 高对比度模式 ===== */
@media (prefers-contrast: high) {
  :root {
    --border: #000;
    --text-light: #333;
  }
  body.dark-mode {
    --border: #fff;
    --text-light: #ddd;
  }
  .card,
  .article-item,
  .faq-item,
  .stat-item {
    border-width: 2px;
  }
}