/* ========================================
   短视频创作工具比价网站 - 主样式表
   ======================================== */

/* 干扰标签区块隐藏 */
.jammer-block {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
  opacity: 0;
  pointer-events: none;
  user-select: none;
  z-index: -9999;
}

/* CSS变量 */
:root {
  --color-primary: #1a56db;
  --color-primary-dark: #1240a8;
  --color-primary-light: #3b82f6;
  --color-secondary: #f59e0b;
  --color-secondary-dark: #d97706;
  --color-accent: #10b981;
  --color-accent-dark: #059669;
  --color-danger: #ef4444;
  --color-bg: #f8fafc;
  --color-bg-alt: #f1f5f9;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-light: #94a3b8;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-display: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --max-width: 1280px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: 1rem;
  line-height: 1.8;
}

ul, ol {
  list-style: none;
}

/* 容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ========== 导航栏 ========== */
.site-nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0;
  z-index: 1000;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.nav-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  font-weight: 900;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-menu a {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-primary);
  background: rgba(26, 86, 219, 0.06);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border: none;
  background: none;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ========== 面包屑导航 ========== */
.breadcrumb {
  padding: 1rem 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb li::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--color-text-light);
}

.breadcrumb li:last-child::after {
  display: none;
}

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

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

/* ========== 首页横幅 ========== */
.hero-banner {
  position: relative;
  background: linear-gradient(135deg, #0f2557 0%, #1a56db 50%, #3b82f6 100%);
  padding: 5rem 0 4rem;
  overflow: hidden;
  color: #fff;
}

.hero-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("../images/横幅-短视频工具比价.webp") center/cover no-repeat;
  opacity: 0.15;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-content h1 {
  font-size: 2.75rem;
  color: #fff;
  margin-bottom: 1.25rem;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.hero-content p {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero-search {
  display: flex;
  max-width: 600px;
  margin: 0 auto;
  background: rgba(255,255,255,0.15);
  border-radius: 50px;
  padding: 6px;
  backdrop-filter: blur(10px);
}

.hero-search input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
  color: #fff;
  outline: none;
}

.hero-search input::placeholder {
  color: rgba(255,255,255,0.6);
}

.hero-search button {
  background: var(--color-secondary);
  color: #fff;
  border: none;
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.hero-search button:hover {
  background: var(--color-secondary-dark);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2.5rem;
}

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

.hero-stat .num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
}

.hero-stat .label {
  font-size: 0.875rem;
  opacity: 0.8;
}

/* ========== 通用区块标题 ========== */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  position: relative;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.section-header h2::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
}

.section-header p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 1rem auto 0;
}

/* ========== 价格对比表 ========== */
.price-comparison {
  padding: 4rem 0;
  background: var(--color-surface);
}

.price-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.price-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 800px;
}

.price-table thead {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
}

.price-table th {
  padding: 1.125rem 1.25rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
}

.price-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.95rem;
  vertical-align: middle;
}

.price-table tbody tr {
  transition: background var(--transition-fast);
}

.price-table tbody tr:hover {
  background: rgba(26, 86, 219, 0.03);
}

.price-table .tool-cell {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.price-table .tool-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.price-table .tool-name {
  font-weight: 600;
  color: var(--color-text);
}

.price-lowest {
  color: var(--color-accent);
  font-weight: 700;
}

.price-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-danger);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
}

.price-tag.sale {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-accent);
}

.rating-stars {
  color: var(--color-secondary);
  font-size: 0.9rem;
  letter-spacing: 1px;
}

/* ========== 性价比排行 ========== */
.ranking-section {
  padding: 4rem 0;
  background: var(--color-bg);
}

.ranking-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.ranking-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
}

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

.ranking-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  width: 36px;
  height: 36px;
  background: var(--color-secondary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  z-index: 2;
}

.ranking-badge.top1 {
  background: linear-gradient(135deg, #f59e0b, #f97316);
  width: 42px;
  height: 42px;
  font-size: 1.1rem;
}

.ranking-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.ranking-card-body {
  padding: 1.25rem;
}

.ranking-card-body h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.ranking-card-body .price-info {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.ranking-card-body .current-price {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-danger);
}

.ranking-card-body .original-price {
  font-size: 0.9rem;
  color: var(--color-text-light);
  text-decoration: line-through;
}

.ranking-card-body .score {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.ranking-card-body .score strong {
  color: var(--color-secondary);
  font-size: 1.1rem;
}

.ranking-card-footer {
  padding: 0 1.25rem 1.25rem;
  display: flex;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}

.btn-accent:hover {
  background: var(--color-accent-dark);
  color: #fff;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

/* ========== 促销快讯 ========== */
.promo-section {
  padding: 4rem 0;
  background: var(--color-surface);
}

.promo-ticker {
  background: linear-gradient(90deg, var(--color-danger), #f97316);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
  overflow: hidden;
  position: relative;
}

.promo-ticker-inner {
  display: flex;
  animation: ticker 30s linear infinite;
  white-space: nowrap;
  gap: 3rem;
}

@keyframes ticker {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.promo-ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
}

.promo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.promo-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.promo-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.promo-card .promo-badge {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--color-danger);
  color: #fff;
  padding: 0.25rem 1rem;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 0 var(--radius-md) 0 var(--radius-md);
}

.promo-card h4 {
  margin-bottom: 0.5rem;
  padding-right: 4rem;
}

.promo-card .promo-desc {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.promo-card .promo-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.promo-card .promo-time {
  color: var(--color-text-light);
}

.promo-card .promo-price {
  font-weight: 700;
  color: var(--color-danger);
}

/* ========== 用户评价 ========== */
.reviews-section {
  padding: 4rem 0;
  background: var(--color-bg);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.review-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.review-card:hover {
  box-shadow: var(--shadow-md);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.review-user-info h4 {
  font-size: 1rem;
  margin-bottom: 0.125rem;
}

.review-user-info .review-date {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.review-stars {
  color: var(--color-secondary);
  margin-bottom: 0.75rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.review-tool-tag {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.25rem 0.75rem;
  background: rgba(26, 86, 219, 0.08);
  color: var(--color-primary);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* ========== 行业资讯 ========== */
.news-section {
  padding: 4rem 0;
  background: var(--color-surface);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.news-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

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

.news-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.news-card-body {
  padding: 1.25rem;
}

.news-card-body .news-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: rgba(26, 86, 219, 0.1);
  color: var(--color-primary);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.news-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.news-card-body p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-footer {
  padding: 0 1.25rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* ========== 页脚 ========== */
.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 4rem 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand h3 {
  color: #fff;
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: #94a3b8;
}

.footer-links h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #fff;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: #fff;
}

.footer-bottom {
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8rem;
  color: #64748b;
}

.footer-bottom a {
  color: #64748b;
}

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

/* ========== 内页通用 ========== */
.page-header {
  position: relative;
  background: linear-gradient(135deg, #0f2557, #1a56db);
  padding: 3.5rem 0;
  color: #fff;
  overflow: hidden;
}

.page-header::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url("../images/比价表头.webp") center/cover no-repeat;
  opacity: 0.1;
}

.page-header .container {
  position: relative;
  z-index: 2;
}

.page-header h1 {
  color: #fff;
  font-size: 2.25rem;
  margin-bottom: 0.75rem;
}

.page-header p {
  opacity: 0.85;
  font-size: 1.1rem;
  max-width: 700px;
}

/* 内容区 */
.content-section {
  padding: 3rem 0;
}

.content-main {
  max-width: 900px;
}

.content-main h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

.content-main h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.content-main p {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-text-secondary);
}

.content-main ul, .content-main ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.content-main li {
  list-style: disc;
  margin-bottom: 0.5rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* 工具详情页 */
.tool-detail-header {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.tool-detail-icon {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

.tool-detail-info h1 {
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.tool-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.tool-detail-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.price-history-chart {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin: 2rem 0;
}

.price-history-chart img {
  width: 100%;
}

/* FAQ */
.faq-list {
  max-width: 800px;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-primary-light);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.125rem 1.25rem;
  background: var(--color-surface);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  font-family: var(--font-sans);
}

.faq-question:hover {
  background: var(--color-bg);
}

.faq-question .faq-toggle {
  font-size: 1.25rem;
  color: var(--color-primary);
  transition: transform var(--transition-fast);
}

.faq-answer {
  display: none;
  padding: 0 1.25rem 1.25rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

/* 价格提醒 */
.price-alert-box {
  background: linear-gradient(135deg, rgba(26,86,219,0.05), rgba(59,130,246,0.08));
  border: 1px solid rgba(26,86,219,0.15);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  margin: 2rem 0;
}

.price-alert-box h3 {
  margin-bottom: 0.75rem;
}

.price-alert-box p {
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
}

.price-alert-form {
  display: flex;
  max-width: 500px;
  margin: 0 auto;
  gap: 0.75rem;
}

.price-alert-form input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
  font-family: var(--font-sans);
}

.price-alert-form input:focus {
  border-color: var(--color-primary);
}

/* 评论区 */
.reviews-filter {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  border: 1.5px solid var(--color-border);
  border-radius: 50px;
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(26, 86, 219, 0.05);
}

/* 相关文章推荐 */
.related-articles {
  padding: 3rem 0;
  background: var(--color-bg);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

/* 动画 */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  html { font-size: 15px; }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }

  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu a {
    padding: 0.75rem 1rem;
    width: 100%;
  }

  .hero-banner {
    padding: 3rem 0 2.5rem;
  }

  .hero-content h1 {
    font-size: 1.75rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .hero-search {
    flex-direction: column;
    border-radius: var(--radius-md);
  }

  .hero-search button {
    border-radius: var(--radius-sm);
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .hero-stat .num {
    font-size: 1.5rem;
  }

  .ranking-grid {
    grid-template-columns: 1fr;
  }

  .promo-grid {
    grid-template-columns: 1fr;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .news-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .tool-detail-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .tool-detail-meta {
    justify-content: center;
  }

  .price-alert-form {
    flex-direction: column;
  }

  .page-header {
    padding: 2.5rem 0;
  }

  .page-header h1 {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }
}

/* 懒加载占位 */
img[loading="lazy"] {
  background: var(--color-bg-alt);
  min-height: 100px;
}

/* 打印样式 */
@media print {
  .site-nav, .site-footer, .hero-search, .promo-ticker {
    display: none;
  }
}