/* ============================================
   女神视频 - 古典芭蕾舞蹈教学视频平台
   主样式表 bl-main.css
   CSS/ID前缀: bl- (Ballet)
   Mobile-First 响应式设计
   ============================================ */

/* === 字体定义 === */
@font-face {
  font-family: 'Playfair Display';
  src: url('../fonts/playfair-display-regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Playfair Display';
  src: url('../fonts/playfair-display-bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Lato';
  src: url('../fonts/lato-regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Lato';
  src: url('../fonts/lato-bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* === CSS变量 === */
:root {
  --bl-velvet-black: #1A1A1A;
  --bl-ballet-pink: #F5D6E4;
  --bl-moonlight-silver: #C0C0C0;
  --bl-deep-black: #111111;
  --bl-soft-white: #FAFAFA;
  --bl-gold-accent: #D4AF37;
  --bl-text-primary: #E8E8E8;
  --bl-text-secondary: #A0A0A0;
  --bl-border-subtle: rgba(192,192,192,0.15);
  --bl-font-heading: 'Playfair Display', 'Georgia', 'Noto Serif SC', serif;
  --bl-font-body: 'Lato', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --bl-transition-smooth: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --bl-max-width: 1440px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--bl-font-body);
  background-color: var(--bl-velvet-black);
  color: var(--bl-text-primary);
  line-height: 1.8;
  overflow-x: hidden;
}

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

a {
  color: var(--bl-ballet-pink);
  text-decoration: none;
  transition: color var(--bl-transition-smooth);
}

a:hover {
  color: #FFE0EE;
}

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

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

.bl-section {
  padding: 60px 0;
}

.bl-section-title {
  text-align: center;
  margin-bottom: 50px;
}

.bl-section-title h2 {
  font-size: 1.8rem;
  margin-bottom: 15px;
  position: relative;
  display: inline-block;
}

.bl-section-title h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 2px;
  background: var(--bl-ballet-pink);
  margin: 15px auto 0;
}

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

/* === 导航栏 === */
#bl-header {
  background-color: var(--bl-velvet-black);
  border-bottom: 1px solid var(--bl-border-subtle);
  padding: 15px 0;
  position: relative;
  z-index: 100;
}

.bl-nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

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

.bl-logo img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.bl-logo-text {
  font-family: var(--bl-font-heading);
  font-size: 1.3rem;
  color: var(--bl-ballet-pink);
  font-weight: 700;
  letter-spacing: 1px;
}

.bl-nav-toggle {
  display: block;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.bl-nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--bl-moonlight-silver);
  margin: 5px 0;
  transition: var(--bl-transition-smooth);
}

.bl-nav-toggle.bl-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.bl-nav-toggle.bl-active span:nth-child(2) {
  opacity: 0;
}
.bl-nav-toggle.bl-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

#bl-main-nav {
  display: none;
  width: 100%;
  padding-top: 15px;
}

#bl-main-nav.bl-nav-open {
  display: block;
}

.bl-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.bl-nav-link {
  display: block;
  padding: 12px 0;
  color: var(--bl-moonlight-silver);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--bl-border-subtle);
  transition: color var(--bl-transition-smooth);
}

.bl-nav-link:hover,
.bl-nav-link.bl-active {
  color: var(--bl-ballet-pink);
}

.bl-nav-right {
  display: none;
  align-items: center;
  gap: 15px;
}

.bl-search-box {
  position: relative;
}

.bl-search-input {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--bl-border-subtle);
  border-radius: 20px;
  padding: 8px 35px 8px 15px;
  color: var(--bl-text-primary);
  font-size: 0.85rem;
  width: 180px;
  outline: none;
  transition: border-color var(--bl-transition-smooth);
}

.bl-search-input:focus {
  border-color: var(--bl-ballet-pink);
}

.bl-search-btn {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--bl-moonlight-silver);
  cursor: pointer;
  font-size: 0.9rem;
}

.bl-btn-login {
  background: transparent;
  border: 1px solid var(--bl-ballet-pink);
  color: var(--bl-ballet-pink);
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--bl-transition-smooth);
}

.bl-btn-login:hover {
  background: var(--bl-ballet-pink);
  color: var(--bl-velvet-black);
}

/* === Hero Banner === */
#bl-hero-banner {
  position: relative;
  width: 100%;
  height: 90vh;
  min-height: 500px;
  overflow: hidden;
}

.bl-hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}

.bl-hero-slide.bl-slide-active {
  opacity: 1;
}

.bl-hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bl-hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(26,26,26,0.3) 0%,
    rgba(26,26,26,0.6) 50%,
    rgba(26,26,26,0.9) 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
}

.bl-hero-content {
  max-width: 700px;
}

.bl-hero-content h1 {
  font-size: 2.2rem;
  margin-bottom: 15px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

.bl-hero-content p {
  font-size: 1.1rem;
  color: var(--bl-moonlight-silver);
  margin-bottom: 30px;
  text-shadow: 0 1px 10px rgba(0,0,0,0.5);
}

.bl-btn-primary {
  display: inline-block;
  background: var(--bl-ballet-pink);
  color: var(--bl-velvet-black);
  padding: 14px 35px;
  border-radius: 30px;
  font-family: var(--bl-font-heading);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 1px;
  transition: all var(--bl-transition-smooth);
  border: none;
  cursor: pointer;
}

.bl-btn-primary:hover {
  background: #FFE0EE;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(245,214,228,0.3);
  color: var(--bl-velvet-black);
}

.bl-hero-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.bl-hero-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: background var(--bl-transition-smooth);
}

.bl-hero-dot.bl-dot-active {
  background: var(--bl-ballet-pink);
}

/* === 视频区域 === */
#bl-video-section {
  background: var(--bl-deep-black);
}

.bl-video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 25px;
}

.bl-video-card {
  background: var(--bl-velvet-black);
  border: 1px solid var(--bl-border-subtle);
  border-radius: 8px;
  overflow: hidden;
  transition: transform var(--bl-transition-smooth), box-shadow var(--bl-transition-smooth);
  cursor: pointer;
}

.bl-video-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(245,214,228,0.1);
}

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

.bl-video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--bl-transition-smooth);
}

.bl-video-card:hover .bl-video-thumb img {
  transform: scale(1.05);
}

.bl-video-play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(245,214,228,0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--bl-transition-smooth);
}

.bl-video-play-icon::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--bl-velvet-black);
  margin-left: 4px;
}

.bl-video-card:hover .bl-video-play-icon {
  background: var(--bl-ballet-pink);
  transform: translate(-50%, -50%) scale(1.1);
}

.bl-video-info {
  padding: 20px;
}

.bl-video-info h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.bl-video-info p {
  color: var(--bl-text-secondary);
  font-size: 0.9rem;
}

.bl-video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
}

/* === 视频模态框 === */
#bl-video-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.92);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

#bl-video-modal.bl-modal-open {
  display: flex;
}

.bl-modal-content {
  position: relative;
  width: 100%;
  max-width: 900px;
}

.bl-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: var(--bl-moonlight-silver);
  font-size: 2rem;
  cursor: pointer;
  transition: color var(--bl-transition-smooth);
  line-height: 1;
}

.bl-modal-close:hover {
  color: var(--bl-ballet-pink);
}

.bl-modal-video {
  width: 100%;
  border-radius: 8px;
  background: #000;
}

/* === 入门指南 === */
#bl-guide-section {
  background: var(--bl-velvet-black);
}

.bl-timeline {
  display: flex;
  flex-direction: column;
  gap: 30px;
  position: relative;
  padding-left: 30px;
}

.bl-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--bl-ballet-pink), var(--bl-moonlight-silver));
}

.bl-timeline-item {
  position: relative;
}

.bl-timeline-dot {
  position: absolute;
  left: -26px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bl-ballet-pink);
  border: 3px solid var(--bl-velvet-black);
}

.bl-timeline-content {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--bl-border-subtle);
  border-radius: 8px;
  padding: 25px;
}

.bl-timeline-content h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--bl-ballet-pink);
}

.bl-timeline-content p {
  color: var(--bl-text-secondary);
  font-size: 0.95rem;
}

.bl-timeline-img {
  margin-top: 15px;
  border-radius: 6px;
  overflow: hidden;
}

/* === 大师课堂 === */
#bl-master-section {
  background: var(--bl-deep-black);
}

.bl-master-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 25px;
}

.bl-master-card {
  background: var(--bl-velvet-black);
  border: 1px solid var(--bl-border-subtle);
  border-radius: 8px;
  padding: 30px;
  text-align: center;
  transition: transform var(--bl-transition-smooth);
}

.bl-master-card:hover {
  transform: translateY(-5px);
}

.bl-master-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 15px;
  border: 3px solid var(--bl-ballet-pink);
}

.bl-master-card h3 {
  font-size: 1.1rem;
  margin-bottom: 5px;
}

.bl-master-role {
  color: var(--bl-ballet-pink);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.bl-master-card p {
  color: var(--bl-text-secondary);
  font-size: 0.9rem;
}

/* === 舞剧鉴赏 === */
#bl-drama-section {
  background: var(--bl-velvet-black);
}

.bl-drama-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 25px;
}

.bl-drama-card {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 3/4;
  cursor: pointer;
}

.bl-drama-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--bl-transition-smooth);
}

.bl-drama-card:hover img {
  transform: scale(1.08);
}

.bl-drama-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(26,26,26,0.95));
  padding: 30px 20px 20px;
}

.bl-drama-overlay h3 {
  font-size: 1.15rem;
  margin-bottom: 5px;
}

.bl-drama-overlay p {
  color: var(--bl-text-secondary);
  font-size: 0.85rem;
}

/* === 学员风采 === */
#bl-student-section {
  background: var(--bl-deep-black);
}

.bl-student-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.bl-student-card {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 1;
}

.bl-student-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--bl-transition-smooth);
}

.bl-student-card:hover img {
  transform: scale(1.05);
}

.bl-student-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  padding: 20px 12px 12px;
}

.bl-student-overlay h3 {
  font-size: 0.9rem;
  margin-bottom: 3px;
}

.bl-student-overlay p {
  color: var(--bl-text-secondary);
  font-size: 0.75rem;
}

/* === 知识百科 === */
#bl-knowledge-section {
  background: var(--bl-velvet-black);
}

.bl-knowledge-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.bl-flip-card {
  perspective: 1000px;
  height: 220px;
  cursor: pointer;
}

.bl-flip-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.bl-flip-card:hover .bl-flip-inner {
  transform: rotateY(180deg);
}

.bl-flip-front,
.bl-flip-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 25px;
  text-align: center;
}

.bl-flip-front {
  background: linear-gradient(135deg, rgba(245,214,228,0.1), rgba(192,192,192,0.05));
  border: 1px solid var(--bl-border-subtle);
}

.bl-flip-front h3 {
  font-size: 1.8rem;
  color: var(--bl-ballet-pink);
  margin-bottom: 8px;
  font-style: italic;
}

.bl-flip-front p {
  color: var(--bl-text-secondary);
  font-size: 0.9rem;
}

.bl-flip-back {
  background: var(--bl-ballet-pink);
  color: var(--bl-velvet-black);
  transform: rotateY(180deg);
}

.bl-flip-back h3 {
  color: var(--bl-velvet-black);
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.bl-flip-back p {
  color: rgba(26,26,26,0.8);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* === 演出资讯 === */
#bl-events-section {
  background: var(--bl-deep-black);
}

.bl-events-list {
  list-style: none;
}

.bl-event-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--bl-border-subtle);
}

.bl-event-date {
  font-family: var(--bl-font-heading);
  color: var(--bl-ballet-pink);
  font-size: 0.95rem;
  font-weight: 700;
  white-space: nowrap;
}

.bl-event-info h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.bl-event-info p {
  color: var(--bl-text-secondary);
  font-size: 0.85rem;
}

.bl-event-venue {
  color: var(--bl-moonlight-silver);
  font-size: 0.85rem;
}

/* === 页脚 === */
#bl-footer {
  background: var(--bl-deep-black);
  border-top: 1px solid var(--bl-border-subtle);
  padding: 60px 0 30px;
}

.bl-footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 35px;
  margin-bottom: 40px;
}

.bl-footer-col h4 {
  font-size: 1.05rem;
  margin-bottom: 15px;
  color: var(--bl-ballet-pink);
}

.bl-footer-col p {
  color: var(--bl-text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

.bl-footer-links {
  list-style: none;
}

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

.bl-footer-links a {
  color: var(--bl-text-secondary);
  font-size: 0.9rem;
  transition: color var(--bl-transition-smooth);
}

.bl-footer-links a:hover {
  color: var(--bl-ballet-pink);
}

.bl-footer-honors {
  list-style: none;
  margin-top: 10px;
}

.bl-footer-honors li {
  color: var(--bl-text-secondary);
  font-size: 0.85rem;
  margin-bottom: 8px;
  padding-left: 25px;
  position: relative;
}

.bl-footer-honors li::before {
  position: absolute;
  left: 0;
}

.bl-footer-honors li:nth-child(1)::before { content: '\1F3C6'; }
.bl-footer-honors li:nth-child(2)::before { content: '\1F3C5'; }
.bl-footer-honors li:nth-child(3)::before { content: '\1F4DC'; }
.bl-footer-honors li:nth-child(4)::before { content: '\00A9\FE0F'; }

.bl-footer-bottom {
  text-align: center;
  padding-top: 25px;
  border-top: 1px solid var(--bl-border-subtle);
}

.bl-footer-bottom p {
  color: var(--bl-text-secondary);
  font-size: 0.8rem;
  margin-bottom: 5px;
}

.bl-auth-number {
  color: var(--bl-moonlight-silver);
  font-size: 0.85rem;
  font-weight: 700;
}

/* === 面包屑 === */
.bl-breadcrumb {
  padding: 15px 0;
  font-size: 0.85rem;
}

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

.bl-breadcrumb a:hover {
  color: var(--bl-ballet-pink);
}

.bl-breadcrumb span {
  color: var(--bl-text-secondary);
  margin: 0 8px;
}

.bl-breadcrumb-current {
  color: var(--bl-ballet-pink);
}

/* === 内页通用 === */
.bl-page-hero {
  position: relative;
  height: 350px;
  overflow: hidden;
}

.bl-page-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bl-page-hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(26,26,26,0.4), rgba(26,26,26,0.85));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
}

.bl-page-hero-overlay h1 {
  font-size: 2rem;
}

.bl-content-area {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
}

.bl-content-area h2 {
  font-size: 1.5rem;
  margin: 35px 0 15px;
}

.bl-content-area h3 {
  font-size: 1.2rem;
  margin: 25px 0 12px;
}

.bl-content-area p {
  margin-bottom: 18px;
  color: var(--bl-text-secondary);
  font-size: 0.95rem;
}

.bl-content-area img {
  border-radius: 8px;
  margin: 20px 0;
}

.bl-content-link {
  color: var(--bl-ballet-pink);
  border-bottom: 1px solid transparent;
  transition: border-color var(--bl-transition-smooth);
}

.bl-content-link:hover {
  border-bottom-color: var(--bl-ballet-pink);
}

/* === 我的练功房 Dashboard === */
.bl-dashboard {
  display: flex;
  flex-direction: column;
  min-height: 70vh;
}

.bl-dashboard-sidebar {
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--bl-border-subtle);
  padding: 20px;
}

.bl-sidebar-menu {
  list-style: none;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.bl-sidebar-link {
  display: block;
  padding: 10px 18px;
  color: var(--bl-text-secondary);
  border-radius: 20px;
  font-size: 0.9rem;
  transition: all var(--bl-transition-smooth);
  background: rgba(255,255,255,0.04);
}

.bl-sidebar-link:hover,
.bl-sidebar-link.bl-sidebar-active {
  background: var(--bl-ballet-pink);
  color: var(--bl-velvet-black);
}

.bl-dashboard-main {
  flex: 1;
  padding: 30px 20px;
}

.bl-course-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.bl-course-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--bl-border-subtle);
  border-radius: 8px;
  overflow: hidden;
}

.bl-course-card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
}

.bl-course-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bl-course-card-body {
  padding: 18px;
}

.bl-course-card-body h3 {
  font-size: 1rem;
  margin-bottom: 10px;
}

.bl-progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}

.bl-progress-fill {
  height: 100%;
  background: linear-gradient(to right, var(--bl-ballet-pink), #FFB6D9);
  border-radius: 3px;
  transition: width 0.5s ease;
}

.bl-progress-text {
  font-size: 0.8rem;
  color: var(--bl-text-secondary);
}

/* === 日历 === */
.bl-calendar {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--bl-border-subtle);
  border-radius: 8px;
  padding: 20px;
}

.bl-calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.bl-calendar-header h3 {
  font-size: 1.1rem;
}

.bl-calendar-nav {
  background: none;
  border: 1px solid var(--bl-border-subtle);
  color: var(--bl-moonlight-silver);
  padding: 5px 12px;
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--bl-transition-smooth);
}

.bl-calendar-nav:hover {
  border-color: var(--bl-ballet-pink);
  color: var(--bl-ballet-pink);
}

.bl-calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
  text-align: center;
}

.bl-calendar-day-header {
  font-size: 0.8rem;
  color: var(--bl-text-secondary);
  padding: 8px 0;
}

.bl-calendar-day {
  padding: 8px;
  border-radius: 4px;
  font-size: 0.85rem;
  color: var(--bl-text-secondary);
  cursor: pointer;
  transition: all var(--bl-transition-smooth);
}

.bl-calendar-day:hover {
  background: rgba(245,214,228,0.1);
}

.bl-calendar-day.bl-day-marked {
  background: var(--bl-ballet-pink);
  color: var(--bl-velvet-black);
  font-weight: 700;
}

.bl-calendar-day.bl-day-today {
  border: 1px solid var(--bl-ballet-pink);
}

/* === 上传模拟 === */
.bl-upload-area {
  border: 2px dashed var(--bl-border-subtle);
  border-radius: 8px;
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--bl-transition-smooth);
}

.bl-upload-area:hover {
  border-color: var(--bl-ballet-pink);
}

.bl-upload-icon {
  font-size: 2.5rem;
  color: var(--bl-moonlight-silver);
  margin-bottom: 10px;
}

.bl-upload-progress {
  display: none;
  margin-top: 20px;
}

.bl-upload-progress.bl-upload-active {
  display: block;
}

.bl-upload-bar {
  width: 100%;
  height: 8px;
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 10px;
}

.bl-upload-fill {
  height: 100%;
  background: var(--bl-ballet-pink);
  border-radius: 4px;
  width: 0%;
  transition: width 0.3s ease;
}

.bl-upload-status {
  font-size: 0.9rem;
  color: var(--bl-ballet-pink);
}

/* === APP下载页 === */
.bl-app-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  padding: 60px 20px;
}

.bl-app-mockup {
  max-width: 280px;
}

.bl-app-mockup img {
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(245,214,228,0.15);
}

.bl-app-info {
  text-align: center;
}

.bl-app-info h2 {
  font-size: 1.8rem;
  margin-bottom: 15px;
}

.bl-app-info p {
  color: var(--bl-text-secondary);
  margin-bottom: 30px;
  max-width: 500px;
}

.bl-app-buttons {
  display: flex;
  flex-direction: column;
  gap: 15px;
  align-items: center;
}

.bl-app-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bl-ballet-pink);
  color: var(--bl-velvet-black);
  padding: 14px 30px;
  border-radius: 30px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--bl-transition-smooth);
}

.bl-app-btn:hover {
  background: #FFE0EE;
  transform: translateY(-2px);
  color: var(--bl-velvet-black);
}

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

.bl-faq-item {
  border-bottom: 1px solid var(--bl-border-subtle);
}

.bl-faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  cursor: pointer;
  color: var(--bl-soft-white);
  font-size: 1rem;
  font-weight: 700;
}

.bl-faq-toggle {
  font-size: 1.5rem;
  color: var(--bl-ballet-pink);
  transition: transform var(--bl-transition-smooth);
}

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

.bl-faq-answer.bl-faq-open {
  max-height: 300px;
  padding-bottom: 20px;
}

.bl-faq-answer p {
  color: var(--bl-text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* === 内页视频列表 === */
.bl-video-list-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

/* === 通用按钮 === */
.bl-btn-outline {
  display: inline-block;
  border: 1px solid var(--bl-ballet-pink);
  color: var(--bl-ballet-pink);
  padding: 10px 25px;
  border-radius: 25px;
  font-size: 0.9rem;
  transition: all var(--bl-transition-smooth);
  background: transparent;
  cursor: pointer;
}

.bl-btn-outline:hover {
  background: var(--bl-ballet-pink);
  color: var(--bl-velvet-black);
}

/* === 特色列表 === */
.bl-feature-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 30px 0;
}

.bl-feature-item {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--bl-border-subtle);
  border-radius: 8px;
  padding: 25px;
}

.bl-feature-item h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--bl-ballet-pink);
}

.bl-feature-item p {
  color: var(--bl-text-secondary);
  font-size: 0.9rem;
}

/* ============================================
   响应式断点 (Mobile-First)
   320px (默认) -> 768px -> 1024px -> 1440px
   ============================================ */

/* --- 768px 及以上 --- */
@media (min-width: 768px) {
  .bl-container {
    padding: 0 30px;
  }

  .bl-section {
    padding: 80px 0;
  }

  .bl-section-title h2 {
    font-size: 2.2rem;
  }

  /* 导航 */
  .bl-nav-toggle {
    display: none;
  }

  #bl-main-nav {
    display: flex;
    width: auto;
    padding-top: 0;
  }

  .bl-nav-list {
    flex-direction: row;
    gap: 5px;
  }

  .bl-nav-link {
    padding: 8px 12px;
    border-bottom: none;
    font-size: 0.85rem;
  }

  .bl-nav-right {
    display: flex;
  }

  /* Hero */
  .bl-hero-content h1 {
    font-size: 3rem;
  }

  .bl-hero-content p {
    font-size: 1.2rem;
  }

  /* 视频 */
  .bl-video-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* 大师 */
  .bl-master-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* 舞剧 */
  .bl-drama-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* 学员 */
  .bl-student-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* 知识 */
  .bl-knowledge-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* 事件 */
  .bl-event-item {
    flex-direction: row;
    align-items: center;
    gap: 25px;
  }

  .bl-event-date {
    min-width: 120px;
  }

  /* 页脚 */
  .bl-footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* 入门时间轴 */
  .bl-timeline {
    flex-direction: row;
    padding-left: 0;
    padding-top: 30px;
  }

  .bl-timeline::before {
    left: 0;
    right: 0;
    top: 8px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(to right, var(--bl-ballet-pink), var(--bl-moonlight-silver));
  }

  .bl-timeline-item {
    flex: 1;
  }

  .bl-timeline-dot {
    left: 50%;
    top: -26px;
    transform: translateX(-50%);
  }

  /* Dashboard */
  .bl-dashboard {
    flex-direction: row;
  }

  .bl-dashboard-sidebar {
    width: 220px;
    border-bottom: none;
    border-right: 1px solid var(--bl-border-subtle);
    padding: 30px 20px;
  }

  .bl-sidebar-menu {
    flex-direction: column;
  }

  .bl-dashboard-main {
    padding: 30px;
  }

  .bl-course-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* APP */
  .bl-app-section {
    flex-direction: row;
    padding: 80px 40px;
  }

  .bl-app-info {
    text-align: left;
  }

  .bl-app-buttons {
    flex-direction: row;
  }

  /* 内页视频列表 */
  .bl-video-list-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* 特色列表 */
  .bl-feature-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- 1024px 及以上 --- */
@media (min-width: 1024px) {
  .bl-container {
    padding: 0 40px;
  }

  .bl-section {
    padding: 100px 0;
  }

  .bl-nav-link {
    padding: 8px 16px;
    font-size: 0.9rem;
  }

  .bl-hero-content h1 {
    font-size: 3.5rem;
  }

  /* 知识 */
  .bl-knowledge-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* 页脚 */
  .bl-footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .bl-page-hero {
    height: 450px;
  }

  .bl-page-hero-overlay h1 {
    font-size: 2.5rem;
  }

  /* 内页视频列表 */
  .bl-video-list-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* 特色列表 */
  .bl-feature-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --- 1440px 及以上 --- */
@media (min-width: 1440px) {
  .bl-container {
    padding: 0 60px;
  }

  .bl-hero-content h1 {
    font-size: 4rem;
  }

  .bl-section-title h2 {
    font-size: 2.5rem;
  }
}