/* =============================================
   每日大赛 (Daily Contest) - 核心样式表
   CSS前缀: dc-
   配色方案:
     主色: #0D1B2A (深空蓝)
     辅色: #1B263B (暗石蓝)
     点缀色: #FF7B00 (活力橙)
     文本色: #E0E1DD (米白)
     链接色: #FF9E4A (亮橙)
   字体: Montserrat (标题), Roboto (正文)
============================================= */

/* === Reset & Base === */
*,
*::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: 'Roboto', sans-serif;
  background-color: #0D1B2A;
  color: #E0E1DD;
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: #FF9E4A;
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #FF7B00;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  line-height: 1.3;
  color: #FFFFFF;
}

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 0.8rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.6rem; }
h4 { font-size: 1.25rem; margin-bottom: 0.5rem; }

p {
  margin-bottom: 1rem;
}

ul, ol {
  list-style: none;
}

/* === 干扰标签隐藏 === */
.contest-jammer-block {
  display: none;
}

/* === 容器 === */
.dc-container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.dc-section {
  padding: 4rem 0;
}

.dc-section-title {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.dc-section-title h2 {
  display: inline-block;
  position: relative;
  padding-bottom: 0.8rem;
}

.dc-section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #FF7B00, #FF9E4A);
  border-radius: 2px;
}

.dc-section-title p {
  color: #8892a4;
  margin-top: 0.8rem;
  font-size: 1.05rem;
}

/* === 导航栏 === */
#dc-header {
  background-color: rgba(13, 27, 42, 0.98);
  padding: 0;
  width: 100%;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 123, 0, 0.15);
}

.dc-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.dc-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.dc-logo img {
  width: 42px;
  height: 42px;
}

.dc-logo-text {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: #FF7B00;
}

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

.dc-nav-links a {
  display: block;
  padding: 0 1.2rem;
  height: 70px;
  line-height: 70px;
  color: #E0E1DD;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
  white-space: nowrap;
}

.dc-nav-links a:hover,
.dc-nav-links a.dc-active {
  color: #FF7B00;
  transform: scale(1.05);
}

.dc-nav-links a.dc-active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 70%;
  height: 3px;
  background: #FF7B00;
  border-radius: 2px;
}

/* 汉堡菜单 */
.dc-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 1100;
}

.dc-hamburger span {
  display: block;
  width: 26px;
  height: 3px;
  background: #E0E1DD;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.dc-hamburger.dc-open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.dc-hamburger.dc-open span:nth-child(2) {
  opacity: 0;
}

.dc-hamburger.dc-open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* 移动端侧边菜单 */
.dc-mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: -280px;
  width: 280px;
  height: 100vh;
  background: #1B263B;
  z-index: 1050;
  transition: right 0.3s ease;
  padding-top: 80px;
  box-shadow: -4px 0 20px rgba(0,0,0,0.5);
}

.dc-mobile-menu.dc-open {
  right: 0;
}

.dc-mobile-menu a {
  display: block;
  padding: 1rem 2rem;
  color: #E0E1DD;
  font-size: 1.05rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: all 0.3s ease;
}

.dc-mobile-menu a:hover,
.dc-mobile-menu a.dc-active {
  color: #FF7B00;
  background: rgba(255, 123, 0, 0.08);
}

.dc-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 1040;
}

.dc-overlay.dc-open {
  display: block;
}

/* === 按钮 === */
.dc-btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.dc-btn-primary {
  background: linear-gradient(135deg, #FF7B00, #FF9E4A);
  color: #0D1B2A;
  box-shadow: 0 4px 15px rgba(255, 123, 0, 0.3);
}

.dc-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(255, 123, 0, 0.5);
  color: #0D1B2A;
}

.dc-btn-outline {
  background: transparent;
  color: #FF7B00;
  border: 2px solid #FF7B00;
}

.dc-btn-outline:hover {
  background: rgba(255, 123, 0, 0.1);
  transform: translateY(-2px);
  color: #FF9E4A;
}

/* === 卡片 === */
.dc-card {
  background: linear-gradient(145deg, #1B263B, #0D1B2A);
  border: 1px solid rgba(255, 123, 0, 0.12);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.dc-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 123, 0, 0.35);
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.dc-card-body {
  padding: 1.5rem;
}

.dc-card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

/* === Hero / 赛事直播 === */
#dc-live-contest {
  background: linear-gradient(180deg, #0D1B2A 0%, #1B263B 100%);
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

#dc-live-contest::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(255,123,0,0.06) 0%, transparent 50%);
  pointer-events: none;
}

.dc-hero-content {
  text-align: center;
  position: relative;
  z-index: 2;
}

.dc-hero-badge {
  display: inline-block;
  background: rgba(255, 123, 0, 0.15);
  color: #FF7B00;
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255,123,0,0.3);
}

.dc-hero-badge .dc-live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #FF7B00;
  border-radius: 50%;
  margin-right: 6px;
  animation: dc-pulse 1.5s infinite;
}

@keyframes dc-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.dc-countdown {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin: 2rem 0;
}

.dc-countdown-item {
  text-align: center;
}

.dc-countdown-num {
  display: block;
  font-family: 'Montserrat', sans-serif;
  font-size: 3rem;
  font-weight: 700;
  color: #FF7B00;
  line-height: 1;
}

.dc-countdown-label {
  font-size: 0.8rem;
  color: #8892a4;
  margin-top: 0.3rem;
}

.dc-live-video-placeholder {
  max-width: 800px;
  margin: 2rem auto 0;
  aspect-ratio: 16/9;
  background: #1B263B;
  border-radius: 12px;
  border: 1px solid rgba(255,123,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.dc-play-icon {
  width: 70px;
  height: 70px;
  background: rgba(255,123,0,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.dc-play-icon:hover {
  transform: scale(1.1);
}

.dc-play-icon::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 12px 0 12px 22px;
  border-color: transparent transparent transparent #0D1B2A;
  margin-left: 4px;
}

/* === 今日赛题 === */
#dc-daily-theme {
  background: #0D1B2A;
}

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

.dc-theme-card .dc-card-body {
  padding: 1.5rem;
}

.dc-tag {
  display: inline-block;
  background: rgba(255, 123, 0, 0.12);
  color: #FF9E4A;
  padding: 0.25rem 0.8rem;
  border-radius: 50px;
  font-size: 0.8rem;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

.dc-prize-pool {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.dc-prize-amount {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: #FF7B00;
}

/* === 排行榜 === */
#dc-leaderboard {
  background: linear-gradient(180deg, #1B263B 0%, #0D1B2A 100%);
}

.dc-leaderboard-table {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
}

.dc-rank-row {
  display: flex;
  align-items: center;
  padding: 1rem 1.5rem;
  margin-bottom: 0.5rem;
  background: rgba(13, 27, 42, 0.6);
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.04);
  transition: all 0.3s ease;
}

.dc-rank-row:hover {
  background: rgba(255, 123, 0, 0.06);
  border-color: rgba(255,123,0,0.2);
}

.dc-rank-row.dc-top-1 {
  background: linear-gradient(135deg, rgba(255,215,0,0.1), rgba(255,123,0,0.08));
  border-color: rgba(255,215,0,0.3);
}

.dc-rank-row.dc-top-2 {
  background: linear-gradient(135deg, rgba(192,192,192,0.08), rgba(255,255,255,0.04));
  border-color: rgba(192,192,192,0.2);
}

.dc-rank-row.dc-top-3 {
  background: linear-gradient(135deg, rgba(205,127,50,0.08), rgba(255,123,0,0.04));
  border-color: rgba(205,127,50,0.2);
}

.dc-rank-num {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  width: 50px;
  text-align: center;
  color: #FF7B00;
}

.dc-rank-avatar {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 1rem;
  border: 2px solid rgba(255,123,0,0.3);
}

.dc-rank-info {
  flex: 1;
}

.dc-rank-name {
  font-weight: 600;
  font-size: 1rem;
}

.dc-rank-works {
  font-size: 0.8rem;
  color: #8892a4;
}

.dc-rank-score {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: #FF9E4A;
}

/* === 视频上传 === */
#dc-video-upload {
  background: #0D1B2A;
}

.dc-upload-zone {
  max-width: 700px;
  margin: 0 auto;
  border: 2px dashed rgba(255, 123, 0, 0.35);
  border-radius: 16px;
  padding: 4rem 2rem;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  background: rgba(27, 38, 59, 0.4);
}

.dc-upload-zone:hover {
  border-color: #FF7B00;
  background: rgba(255, 123, 0, 0.04);
}

.dc-upload-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  color: #FF7B00;
}

.dc-upload-formats {
  font-size: 0.85rem;
  color: #8892a4;
  margin-top: 1rem;
}

/* === 评委席 === */
#dc-judges {
  background: linear-gradient(180deg, #0D1B2A 0%, #1B263B 100%);
}

.dc-judges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.dc-judge-card {
  text-align: center;
  padding: 2rem 1.5rem;
}

.dc-judge-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 1rem;
  border: 3px solid rgba(255, 123, 0, 0.3);
}

.dc-judge-name {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.dc-judge-title {
  font-size: 0.85rem;
  color: #FF9E4A;
  margin-bottom: 0.8rem;
}

.dc-judge-bio {
  font-size: 0.9rem;
  color: #8892a4;
  line-height: 1.6;
}

/* === 积分商城 === */
#dc-points-mall {
  background: #0D1B2A;
}

.dc-mall-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.dc-mall-card .dc-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.dc-points-price {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: #FF7B00;
}

.dc-points-label {
  font-size: 0.8rem;
  color: #8892a4;
}

/* === 会员开通 === */
#dc-vip {
  background: linear-gradient(180deg, #1B263B 0%, #0D1B2A 100%);
}

.dc-vip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.dc-vip-card {
  text-align: center;
  padding: 2.5rem 2rem;
  position: relative;
}

.dc-vip-card.dc-vip-featured {
  border-color: rgba(255, 123, 0, 0.5);
  box-shadow: 0 0 30px rgba(255, 123, 0, 0.15);
}

.dc-vip-badge {
  position: absolute;
  top: -1px;
  right: 20px;
  background: #FF7B00;
  color: #0D1B2A;
  padding: 0.3rem 1rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 0 0 8px 8px;
}

.dc-vip-tier {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #FF9E4A;
}

.dc-vip-price {
  font-family: 'Montserrat', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 1.5rem;
}

.dc-vip-price span {
  font-size: 1rem;
  color: #8892a4;
}

.dc-vip-features {
  text-align: left;
  margin-bottom: 2rem;
}

.dc-vip-features li {
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  font-size: 0.95rem;
  color: #E0E1DD;
}

.dc-vip-features li::before {
  content: '✓';
  color: #FF7B00;
  margin-right: 0.6rem;
  font-weight: 700;
}

/* === 广告投放 === */
#dc-ad-placement {
  background: #0D1B2A;
}

.dc-ad-banner {
  max-width: 900px;
  margin: 0 auto;
  background: linear-gradient(135deg, #1B263B, rgba(255,123,0,0.08));
  border: 1px solid rgba(255,123,0,0.2);
  border-radius: 16px;
  padding: 3rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.dc-ad-content {
  flex: 1;
}

.dc-ad-stats {
  display: flex;
  gap: 2rem;
  margin: 1.5rem 0;
}

.dc-ad-stat-num {
  font-family: 'Montserrat', sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: #FF7B00;
  display: block;
}

.dc-ad-stat-label {
  font-size: 0.8rem;
  color: #8892a4;
}

/* === APP下载 === */
#dc-app-download {
  background: linear-gradient(180deg, #1B263B 0%, #0D1B2A 100%);
}

.dc-app-layout {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.dc-app-info {
  flex: 1;
}

.dc-app-mockup {
  flex: 0 0 300px;
}

.dc-app-mockup img {
  width: 100%;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.dc-app-buttons {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.dc-store-btn {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.8rem 1.5rem;
  background: #1B263B;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  transition: all 0.3s ease;
}

.dc-store-btn:hover {
  border-color: #FF7B00;
  background: rgba(255,123,0,0.06);
}

.dc-store-btn-text small {
  display: block;
  font-size: 0.7rem;
  color: #8892a4;
}

.dc-store-btn-text strong {
  font-size: 1rem;
  color: #E0E1DD;
}

/* === 赛事规则 === */
#dc-rules {
  background: #0D1B2A;
}

.dc-rules-list {
  max-width: 800px;
  margin: 0 auto;
}

.dc-rule-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.dc-rule-num {
  flex: 0 0 50px;
  height: 50px;
  background: linear-gradient(135deg, #FF7B00, #FF9E4A);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Montserrat', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: #0D1B2A;
}

.dc-rule-content h4 {
  margin-bottom: 0.4rem;
}

.dc-rule-content p {
  color: #8892a4;
  font-size: 0.95rem;
}

/* === 页脚 === */
#dc-footer {
  background: #0a1525;
  border-top: 1px solid rgba(255,123,0,0.1);
  padding: 3rem 0 0;
}

.dc-footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding-bottom: 2rem;
}

.dc-footer-col h4 {
  color: #FF9E4A;
  margin-bottom: 1rem;
  font-size: 1rem;
}

.dc-footer-col a {
  display: block;
  color: #8892a4;
  padding: 0.3rem 0;
  font-size: 0.9rem;
  transition: color 0.3s ease;
}

.dc-footer-col a:hover {
  color: #FF7B00;
}

.dc-social-icons {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.dc-social-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,123,0,0.1);
  border: 1px solid rgba(255,123,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  font-size: 0.85rem;
  color: #FF9E4A;
}

.dc-social-icon:hover {
  background: #FF7B00;
  color: #0D1B2A;
}

.dc-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: #5a6577;
}

.dc-footer-bottom p {
  margin-bottom: 0.3rem;
}

.dc-license-badge {
  display: inline-block;
  background: rgba(255,123,0,0.08);
  border: 1px solid rgba(255,123,0,0.15);
  padding: 0.3rem 1rem;
  border-radius: 4px;
  font-size: 0.75rem;
  color: #8892a4;
  margin-bottom: 0.5rem;
}

/* === 内页通用 === */
.dc-page-hero {
  background: linear-gradient(180deg, #1B263B 0%, #0D1B2A 100%);
  padding: 4rem 0 3rem;
  text-align: center;
}

.dc-page-hero p {
  color: #8892a4;
  max-width: 600px;
  margin: 0.5rem auto 0;
}

.dc-content-area {
  padding: 3rem 0;
}

.dc-content-area article {
  max-width: 900px;
  margin: 0 auto;
  line-height: 1.8;
}

.dc-content-area article p {
  margin-bottom: 1.2rem;
  color: #c8cad0;
}

.dc-content-area article h2 {
  margin-top: 2rem;
}

.dc-content-area article h3 {
  margin-top: 1.5rem;
}

/* === 视频网格 === */
.dc-video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.dc-video-card {
  position: relative;
}

.dc-video-card .dc-card-img-wrap {
  position: relative;
  overflow: hidden;
}

.dc-video-card .dc-card-img-wrap::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 50px;
  height: 50px;
  background: rgba(255,123,0,0.85);
  border-radius: 50%;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.dc-video-card:hover .dc-card-img-wrap::after {
  opacity: 1;
}

.dc-video-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.8rem;
  font-size: 0.85rem;
  color: #8892a4;
}

.dc-video-author {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dc-video-author img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
}

/* === APP下载独立页面 === */
.dc-app-page-hero {
  background: linear-gradient(180deg, #1B263B 0%, #0D1B2A 100%);
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.dc-app-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.dc-app-feature-card {
  text-align: center;
  padding: 2rem;
}

.dc-app-feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #FF7B00, #FF9E4A);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.5rem;
}

.dc-app-screenshots {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 3rem 0;
}

.dc-app-screenshot {
  width: 200px;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

/* === 进度条加载动画 === */
.dc-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, #FF7B00, #FF9E4A);
  z-index: 9999;
  transition: width 0.3s ease;
}

/* === 数字动画 === */
.dc-animate-num {
  display: inline-block;
}

/* === 响应式 === */

/* 1024px */
@media (max-width: 1024px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }

  .dc-ad-banner {
    flex-direction: column;
    text-align: center;
  }

  .dc-ad-stats {
    justify-content: center;
  }

  .dc-app-layout {
    flex-direction: column;
    text-align: center;
  }

  .dc-app-mockup {
    flex: 0 0 auto;
    max-width: 250px;
  }

  .dc-app-buttons {
    justify-content: center;
  }
}

/* 768px */
@media (max-width: 768px) {
  .dc-nav-links {
    display: none;
  }

  .dc-hamburger {
    display: flex;
  }

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

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

  .dc-social-icons {
    justify-content: center;
  }

  .dc-countdown-num {
    font-size: 2.2rem;
  }

  .dc-section {
    padding: 3rem 0;
  }

  .dc-vip-grid {
    grid-template-columns: 1fr;
  }
}

/* 360px */
@media (max-width: 400px) {
  html { font-size: 14px; }

  .dc-container {
    padding: 0 1rem;
  }

  .dc-countdown {
    gap: 0.8rem;
  }

  .dc-countdown-num {
    font-size: 1.8rem;
  }

  .dc-upload-zone {
    padding: 2.5rem 1rem;
  }

  .dc-theme-grid {
    grid-template-columns: 1fr;
  }

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