/* ============================================
   糖心vlog 原创样式表
   配色方案：深酒红 + 玫瑰金 + 暗黑背景
   ============================================ */

/* CSS变量定义 */
:root {
  --color-bg-primary: #0d0a12;
  --color-bg-secondary: #1a1525;
  --color-bg-card: #221d2e;
  --color-accent-pink: #e84393;
  --color-accent-gold: #d4a853;
  --color-accent-rose: #fd79a8;
  --color-text-primary: #f0e6f6;
  --color-text-secondary: #b8a9c9;
  --color-text-muted: #7f7192;
  --color-border: #3d3450;
  --color-gradient-start: #e84393;
  --color-gradient-end: #d4a853;
  --font-heading: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-card: 0 8px 32px rgba(232,67,147,0.10);
  --shadow-hover: 0 12px 40px rgba(232,67,147,0.20);
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重置与基础 */
*, *::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-body);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.8;
  overflow-x: hidden;
  min-height: 100vh;
}

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

a {
  color: var(--color-accent-rose);
  text-decoration: none;
  transition: var(--transition-base);
}

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

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

/* ============================================
   顶部导航栏（非sticky）
   ============================================ */
.site-header {
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, #2a1f3d 100%);
  border-bottom: 2px solid var(--color-border);
  padding: 0;
  position: relative;
  z-index: 100;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1280px;
  margin: 0 auto;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-logo img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
}

.site-logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--color-accent-pink), var(--color-accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-age-badge {
  background: linear-gradient(135deg, #ff4757, #c0392b);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: 1px;
}

/* 汉堡菜单按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 200;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--color-accent-rose);
  margin: 5px 0;
  border-radius: 3px;
  transition: var(--transition-base);
}

/* 主导航 */
.main-nav {
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
}

.main-nav ul {
  display: flex;
  list-style: none;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0;
  justify-content: center;
  flex-wrap: wrap;
}

.main-nav li {
  position: relative;
}

.main-nav a {
  display: block;
  padding: 14px 22px;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  transition: var(--transition-base);
  border-bottom: 3px solid transparent;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-accent-pink);
  border-bottom-color: var(--color-accent-pink);
  background: rgba(232,67,147,0.06);
}

/* ============================================
   英雄横幅区域
   ============================================ */
.hero-section {
  position: relative;
  overflow: hidden;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
  filter: brightness(0.5);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(13,10,18,0.3) 0%, rgba(13,10,18,0.85) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 60px 20px;
  max-width: 800px;
}

.hero-content h1 {
  font-size: 2.6rem;
  margin-bottom: 16px;
  background: linear-gradient(90deg, #fff, var(--color-accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
  line-height: 1.9;
}

.hero-cta {
  display: inline-block;
  padding: 14px 40px;
  background: linear-gradient(135deg, var(--color-accent-pink), var(--color-accent-gold));
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  border-radius: 50px;
  box-shadow: 0 6px 24px rgba(232,67,147,0.35);
  transition: var(--transition-base);
  border: none;
  cursor: pointer;
}

.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 36px rgba(232,67,147,0.5);
  color: #fff;
}

/* ============================================
   面包屑导航
   ============================================ */
.breadcrumb-nav {
  background: var(--color-bg-secondary);
  padding: 12px 20px;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb-nav ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 1280px;
  margin: 0 auto;
  font-size: 0.85rem;
}

.breadcrumb-nav li::after {
  content: ">";
  margin-left: 8px;
  color: var(--color-text-muted);
}

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

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

.breadcrumb-nav a:hover {
  color: var(--color-accent-rose);
}

.breadcrumb-nav .current {
  color: var(--color-accent-gold);
}

/* ============================================
   内容容器
   ============================================ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-block {
  padding: 50px 0;
}

.section-block:nth-child(even) {
  background: var(--color-bg-secondary);
}

.section-title {
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 16px;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent-pink), var(--color-accent-gold));
  border-radius: 3px;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 36px;
}

/* ============================================
   视频卡片网格
   ============================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
  padding: 10px 0;
}

.video-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent-pink);
}

.video-card-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3/4;
}

.video-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.video-card-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  background: rgba(232,67,147,0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-base);
}

.video-card:hover .video-card-play {
  opacity: 1;
}

.video-card-play::after {
  content: "";
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}

.video-card-rating {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(212,168,83,0.9);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

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

.video-card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-card-meta {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============================================
   视频播放器模块
   ============================================ */
.video-player-wrap {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 0 auto 30px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  aspect-ratio: 16/9;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.video-player-wrap video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-player-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a1525, #2a1f3d);
  color: var(--color-text-secondary);
  gap: 16px;
}

.video-player-placeholder .play-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--color-accent-pink), var(--color-accent-gold));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-base);
}

.video-player-placeholder .play-icon:hover {
  transform: scale(1.1);
  box-shadow: 0 0 30px rgba(232,67,147,0.5);
}

.video-player-placeholder .play-icon::after {
  content: "";
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 14px 0 14px 24px;
  border-color: transparent transparent transparent #fff;
  margin-left: 6px;
}

/* ============================================
   国际合作模块
   ============================================ */
.collab-section {
  background: linear-gradient(135deg, var(--color-bg-secondary), #2a1f3d);
  padding: 50px 0;
}

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

.collab-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

.collab-text p {
  color: var(--color-text-secondary);
  line-height: 1.9;
  margin-bottom: 12px;
}

/* ============================================
   关于我们
   ============================================ */
.about-content {
  max-width: 900px;
  margin: 0 auto;
  line-height: 2;
}

.about-content p {
  margin-bottom: 18px;
  color: var(--color-text-secondary);
  text-indent: 2em;
}

.about-content h3 {
  margin: 28px 0 14px;
  color: var(--color-accent-gold);
  font-size: 1.3rem;
  border-left: 4px solid var(--color-accent-pink);
  padding-left: 14px;
}

/* ============================================
   支付方式
   ============================================ */
.payment-section {
  text-align: center;
}

.payment-icons-wrap {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.payment-icons-wrap img {
  height: 50px;
  border-radius: var(--radius-sm);
}

/* ============================================
   用户评论
   ============================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

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

.review-card:hover {
  border-color: var(--color-accent-pink);
  box-shadow: var(--shadow-hover);
}

.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(--color-accent-pink), var(--color-accent-gold));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.review-info {
  flex: 1;
}

.review-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.review-location {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.review-stars {
  color: var(--color-accent-gold);
  font-size: 1rem;
  margin-bottom: 10px;
  letter-spacing: 2px;
}

.review-text {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

.review-date {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 12px;
}

/* ============================================
   常见问题FAQ
   ============================================ */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.faq-question {
  padding: 18px 24px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-base);
  font-size: 1rem;
}

.faq-question:hover {
  background: rgba(232,67,147,0.06);
}

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--color-accent-pink);
  font-weight: 300;
  transition: var(--transition-base);
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--color-text-secondary);
  line-height: 1.9;
}

.faq-item.open .faq-answer {
  padding: 0 24px 20px;
  max-height: 500px;
}

/* ============================================
   授权与合规
   ============================================ */
.license-section {
  text-align: center;
}

.license-badge-img {
  width: 180px;
  height: 180px;
  margin: 0 auto 20px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 6px 24px rgba(212,168,83,0.3);
}

.license-info {
  max-width: 700px;
  margin: 0 auto;
  color: var(--color-text-secondary);
  line-height: 1.9;
}

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

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

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

.support-icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

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

.support-card p {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

/* ============================================
   页脚
   ============================================ */
.site-footer {
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, #0a0710 100%);
  border-top: 2px solid var(--color-border);
  padding: 50px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: var(--color-accent-gold);
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--color-accent-pink);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  transition: var(--transition-base);
}

.footer-col a:hover {
  color: var(--color-accent-rose);
  padding-left: 4px;
}

.footer-social {
  display: flex;
  gap: 14px;
  margin-top: 10px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  transition: var(--transition-base);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px;
  text-align: center;
  max-width: 1280px;
  margin: 0 auto;
}

.footer-bottom p {
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin-bottom: 6px;
}

.footer-payment {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: 14px 0;
  flex-wrap: wrap;
}

.footer-age-warning {
  display: inline-block;
  background: linear-gradient(135deg, #ff4757, #c0392b);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  margin-top: 10px;
}

/* ============================================
   内页样式
   ============================================ */
.page-hero {
  position: relative;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.page-hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  filter: blur(3px) brightness(0.4);
}

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

.page-hero-content h1 {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.page-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 20px;
}

.page-content p {
  margin-bottom: 16px;
  color: var(--color-text-secondary);
  line-height: 2;
  text-indent: 2em;
}

.page-content h2 {
  font-size: 1.5rem;
  margin: 32px 0 16px;
  color: var(--color-accent-gold);
  border-left: 4px solid var(--color-accent-pink);
  padding-left: 14px;
}

.page-content h3 {
  font-size: 1.2rem;
  margin: 24px 0 12px;
  color: var(--color-text-primary);
}

.page-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.page-gallery img {
  border-radius: var(--radius-md);
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
}

.page-gallery img:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-hover);
}

/* ============================================
   APP下载页面
   ============================================ */
.download-hero {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(135deg, #1a1525, #2a1f3d, #1a1525);
}

.download-hero img {
  max-width: 600px;
  margin: 0 auto 30px;
  border-radius: var(--radius-lg);
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition-base);
  border: 2px solid transparent;
}

.download-btn-primary {
  background: linear-gradient(135deg, var(--color-accent-pink), var(--color-accent-gold));
  color: #fff;
}

.download-btn-secondary {
  background: transparent;
  border-color: var(--color-accent-rose);
  color: var(--color-accent-rose);
}

.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(232,67,147,0.35);
  color: #fff;
}

.download-features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 24px;
  margin-top: 50px;
}

.download-feature-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: 30px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
}

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

.download-feature-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.download-feature-card h4 {
  margin-bottom: 10px;
  color: var(--color-accent-gold);
}

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

/* ============================================
   响应式设计 - 移动端优先
   ============================================ */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-bg-secondary);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    z-index: 150;
    border-bottom: 2px solid var(--color-border);
  }

  .main-nav.open {
    max-height: 600px;
  }

  .main-nav ul {
    flex-direction: column;
  }

  .main-nav a {
    padding: 14px 24px;
    border-bottom: 1px solid var(--color-border);
    border-left: 3px solid transparent;
  }

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

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

  .hero-section {
    min-height: 320px;
  }

  .video-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .collab-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .section-title {
    font-size: 1.4rem;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-hero {
    min-height: 200px;
  }

  .page-hero-content h1 {
    font-size: 1.6rem;
  }

  .download-hero img {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .video-grid {
    grid-template-columns: 1fr;
  }

  .header-top {
    padding: 10px 14px;
  }

  .site-logo-text {
    font-size: 1.1rem;
  }

  .hero-content {
    padding: 40px 16px;
  }

  .hero-content h1 {
    font-size: 1.5rem;
  }

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

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

/* ============================================
   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;
}

/* 性能优化 */
.lazy-load {
  opacity: 0;
  transition: opacity 0.5s ease;
}

.lazy-load.loaded {
  opacity: 1;
}