/* ============================================
   影视传媒网站 - 暗夜霓虹主题样式表
   独特配色：深紫+霓虹红+暗蓝渐变
   ============================================ */

/* CSS变量定义 */
:root {
  --primary-bg: #0a0a1a;
  --secondary-bg: #12122a;
  --card-bg: #1a1a3e;
  --accent-red: #e63946;
  --accent-gold: #f4a261;
  --accent-purple: #7b2d8e;
  --text-primary: #f0f0f5;
  --text-secondary: #b0b0c8;
  --text-muted: #6c6c8a;
  --border-color: #2a2a4e;
  --gradient-start: #0a0a1a;
  --gradient-end: #1a0a2e;
  --shadow-color: rgba(230, 57, 70, 0.15);
  --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --max-width: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
}

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

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

body {
  font-family: var(--font-body);
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: var(--text-primary);
  line-height: 1.8;
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--accent-red);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--accent-gold);
}

/* ============ 导航栏 ============ */
.site-header {
  background: rgba(10, 10, 26, 0.95);
  border-bottom: 2px solid var(--accent-red);
  padding: 0;
  position: relative;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
}

.site-logo img {
  height: 50px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0;
}

.main-nav a {
  color: var(--text-primary);
  padding: 10px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 3px solid transparent;
  transition: all 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--accent-red);
  border-bottom-color: var(--accent-red);
}

.nav-cta {
  background: linear-gradient(135deg, var(--accent-red), #c1121f);
  color: #fff !important;
  padding: 8px 20px !important;
  border-radius: var(--radius-sm);
  border-bottom: none !important;
  font-weight: 700;
}

.nav-cta:hover {
  background: linear-gradient(135deg, #c1121f, var(--accent-red));
  transform: translateY(-1px);
}

/* 移动端汉堡菜单 */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle span {
  display: block;
  width: 28px;
  height: 3px;
  background: var(--text-primary);
  margin: 5px 0;
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ============ 面包屑导航 ============ */
.breadcrumb-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.breadcrumb-nav span {
  margin: 0 6px;
}

/* ============ 英雄区域 ============ */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(180deg, #0a0a1a 0%, #1a0a2e 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 40px 20px;
  max-width: 800px;
}

.hero-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.3;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-red), #c1121f);
  color: #fff;
  padding: 14px 40px;
  border-radius: var(--radius-md);
  font-size: 1.1rem;
  font-weight: 700;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px var(--shadow-color);
}

.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--shadow-color);
  color: #fff;
}

/* ============ 视频播放区域 ============ */
.video-showcase {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 20px;
}

.video-player-wrapper {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 0 auto 30px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.video-player-wrapper video {
  width: 100%;
  display: block;
}

.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.4);
  cursor: pointer;
  transition: background 0.3s ease;
}

.play-overlay:hover {
  background: rgba(0, 0, 0, 0.2);
}

.play-btn {
  width: 80px;
  height: 80px;
  background: var(--accent-red);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}

.play-btn::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 16px 0 16px 28px;
  border-color: transparent transparent transparent #fff;
  margin-left: 5px;
}

.play-overlay:hover .play-btn {
  transform: scale(1.1);
}

/* ============ 通用区块 ============ */
.section-block {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 20px;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  color: var(--text-primary);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent-red);
  margin: 12px auto 0;
  border-radius: 2px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 40px;
}

/* ============ 视频卡片网格 ============ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 30px;
}

.video-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: all 0.35s ease;
  position: relative;
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 35px rgba(230, 57, 70, 0.2);
  border-color: var(--accent-red);
}

.video-card-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.video-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.video-card:hover .video-card-thumb img {
  transform: scale(1.08);
}

.video-card-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--accent-red);
  color: #fff;
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
}

.video-card-body {
  padding: 16px;
}

.video-card-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
  line-height: 1.4;
}

.video-card-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.video-card-rating {
  color: var(--accent-gold);
}

/* ============ 影评区域 ============ */
.review-section {
  background: var(--secondary-bg);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 40px;
}

.review-article {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: start;
}

.review-article-img {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.review-article-img img {
  width: 100%;
  border-radius: var(--radius-md);
}

.review-article-text h3 {
  font-size: 1.5rem;
  margin-bottom: 16px;
  color: var(--accent-gold);
}

.review-article-text p {
  margin-bottom: 14px;
  color: var(--text-secondary);
  line-height: 1.9;
}

/* ============ 近期案例 ============ */
.case-study {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
  margin-top: 30px;
}

.case-video {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  background: #000;
}

.case-video video {
  width: 100%;
  display: block;
}

.case-text h3 {
  font-size: 1.4rem;
  margin-bottom: 14px;
  color: var(--accent-gold);
}

.case-text p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.8;
}

/* ============ 招聘模块 ============ */
.recruitment-section {
  background: linear-gradient(135deg, #1a0a2e, #2d1b69);
  border-radius: var(--radius-lg);
  padding: 50px 40px;
  margin-top: 50px;
  text-align: center;
  border: 1px solid var(--accent-purple);
  position: relative;
  overflow: hidden;
}

.recruitment-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(123, 45, 142, 0.1) 0%, transparent 70%);
  animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.recruitment-section h2 {
  font-size: 2rem;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.recruitment-section .recruit-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 700px;
  margin: 0 auto 30px;
  position: relative;
  z-index: 1;
  line-height: 1.9;
}

.recruit-positions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 30px;
  position: relative;
  z-index: 1;
}

.recruit-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all 0.3s ease;
}

.recruit-card:hover {
  border-color: var(--accent-gold);
  transform: translateY(-4px);
}

.recruit-card h4 {
  color: var(--accent-gold);
  font-size: 1.1rem;
  margin-bottom: 10px;
}

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

/* ============ 关于我们 ============ */
.about-section {
  background: var(--secondary-bg);
  border-radius: var(--radius-lg);
  padding: 50px 40px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.9;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 20px;
}

.stat-item {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  border: 1px solid var(--border-color);
}

.stat-item .stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-red);
  display: block;
}

.stat-item .stat-label {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 4px;
}

/* ============ 支付方式 ============ */
.payment-section {
  margin-top: 50px;
}

.payment-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.payment-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: all 0.3s ease;
}

.payment-card:hover {
  border-color: var(--accent-gold);
}

.payment-card h4 {
  color: var(--accent-gold);
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.payment-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ============ 制作方信息 ============ */
.producer-section {
  background: var(--secondary-bg);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 50px;
}

.producer-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 30px;
  align-items: center;
}

.producer-badge img {
  width: 120px;
  border-radius: var(--radius-md);
}

.producer-info h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: var(--accent-gold);
}

.producer-info p {
  color: var(--text-secondary);
  margin-bottom: 10px;
  line-height: 1.8;
}

/* ============ 客户支持 ============ */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.support-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  transition: all 0.3s ease;
}

.support-card:hover {
  border-color: var(--accent-red);
  transform: translateY(-3px);
}

.support-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.support-card h4 {
  color: var(--text-primary);
  margin-bottom: 8px;
}

.support-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 800px;
  margin: 30px auto 0;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  color: var(--text-primary);
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-body);
  transition: background 0.3s ease;
}

.faq-question:hover {
  background: rgba(230, 57, 70, 0.05);
}

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent-red);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 10px;
}

.faq-item.open .faq-question::after {
  content: '-';
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.35s ease;
}

.faq-item.open .faq-answer {
  padding: 0 24px 18px;
  max-height: 500px;
}

.faq-answer p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============ 用户评论 ============ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all 0.3s ease;
}

.review-card:hover {
  border-color: var(--accent-gold);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-red), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.review-meta h4 {
  font-size: 1rem;
  color: var(--text-primary);
}

.review-meta .review-location {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.review-stars {
  color: var(--accent-gold);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.review-text {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
}

.review-date {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 10px;
}

/* ============ 作者信息 ============ */
.author-box {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 30px;
}

.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-red), var(--accent-gold));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  flex-shrink: 0;
}

.author-info h4 {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.author-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ============ 负责任影视 ============ */
.responsible-section {
  background: linear-gradient(135deg, #1a1a3e, #0d3b66);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 50px;
  border: 1px solid var(--border-color);
}

.responsible-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.responsible-item {
  padding: 20px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.responsible-item h4 {
  color: var(--accent-gold);
  margin-bottom: 8px;
}

.responsible-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ============ 页脚 ============ */
.site-footer {
  background: #050510;
  border-top: 2px solid var(--accent-red);
  margin-top: 80px;
  padding: 50px 20px 20px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--text-primary);
  font-size: 1.05rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent-red);
  display: inline-block;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  padding: 4px 0;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.footer-col a:hover {
  color: var(--accent-red);
  padding-left: 6px;
}

.footer-col p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: all 0.3s ease;
  padding: 0;
}

.footer-social a:hover {
  background: var(--accent-red);
  border-color: var(--accent-red);
  color: #fff;
  padding-left: 0;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.footer-payment-icons {
  display: flex;
  gap: 10px;
  align-items: center;
}

.footer-payment-icons img {
  height: 30px;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.footer-payment-icons img:hover {
  opacity: 1;
}

.footer-age-badge {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-age-badge img {
  width: 40px;
}

/* ============ 内页样式 ============ */
.page-hero {
  background: linear-gradient(135deg, var(--gradient-start), var(--accent-purple));
  padding: 60px 20px;
  text-align: center;
}

.page-hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

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

.content-article {
  max-width: 900px;
  margin: 0 auto;
  padding: 50px 20px;
}

.content-article h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 30px 0 14px;
  color: var(--accent-gold);
  border-left: 4px solid var(--accent-red);
  padding-left: 14px;
}

.content-article h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 24px 0 10px;
  color: var(--text-primary);
}

.content-article p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.9;
}

.content-article img {
  border-radius: var(--radius-md);
  margin: 20px 0;
  width: 100%;
}

.content-article ul, .content-article ol {
  color: var(--text-secondary);
  margin: 14px 0 14px 24px;
  line-height: 1.9;
}

/* ============ APP下载页面 ============ */
.app-download-hero {
  background: linear-gradient(135deg, #1a0a2e, #0a0a1a);
  padding: 80px 20px;
  text-align: center;
}

.app-mockup {
  max-width: 300px;
  margin: 30px auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(230, 57, 70, 0.3);
}

.app-mockup img {
  width: 100%;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--card-bg);
  border: 2px solid var(--accent-red);
  color: var(--text-primary);
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.3s ease;
}

.download-btn:hover {
  background: var(--accent-red);
  color: #fff;
  transform: translateY(-3px);
}

.app-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  max-width: var(--max-width);
  margin: 50px auto;
  padding: 0 20px;
}

.app-feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  transition: all 0.3s ease;
}

.app-feature-card:hover {
  border-color: var(--accent-red);
  transform: translateY(-4px);
}

.app-feature-icon {
  font-size: 2.5rem;
  margin-bottom: 14px;
}

.app-feature-card h3 {
  color: var(--text-primary);
  margin-bottom: 8px;
  font-size: 1.1rem;
}

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

/* ============ 响应式设计 ============ */
@media screen and (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 10, 26, 0.98);
    flex-direction: column;
    padding: 10px 0;
    border-bottom: 2px solid var(--accent-red);
  }

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

  .main-nav a {
    padding: 12px 20px;
    border-bottom: none;
    border-left: 3px solid transparent;
  }

  .main-nav a:hover,
  .main-nav a.active {
    border-left-color: var(--accent-red);
    border-bottom-color: transparent;
  }

  .mobile-toggle {
    display: block;
  }

  .hero-content h1 {
    font-size: 1.8rem;
  }

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

  .hero-section {
    min-height: 400px;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .review-article {
    grid-template-columns: 1fr;
  }

  .case-study {
    grid-template-columns: 1fr;
  }

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

  .producer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .producer-badge img {
    margin: 0 auto;
  }

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

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

  .video-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

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

  .recruitment-section {
    padding: 30px 20px;
  }

  .about-section {
    padding: 30px 20px;
  }

  .review-section {
    padding: 24px;
  }

  .responsible-section {
    padding: 24px;
  }

  .author-box {
    flex-direction: column;
    text-align: center;
  }

  .section-block {
    padding: 40px 16px;
  }

  .app-download-hero {
    padding: 50px 16px;
  }
}

@media screen and (max-width: 480px) {
  html {
    font-size: 14px;
  }

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

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

  .about-stats {
    grid-template-columns: 1fr;
  }

  .recruit-positions {
    grid-template-columns: 1fr;
  }

  .download-buttons {
    flex-direction: column;
    align-items: center;
  }
}

/* ============ 动画效果 ============ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* ============ 工具类 ============ */
.text-center { text-align: center; }
.text-accent { color: var(--accent-red); }
.text-gold { color: var(--accent-gold); }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }
.mb-20 { margin-bottom: 20px; }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}