/* ============================================
   安徽影像家摄影俱乐部 - 主样式表 v2.0 (Premium)
   The Image Makers' Club
   设计语言：深色摄影感 + 金棕渐变 + 毛玻璃 + 微光动画
   参考：原版站点 + 摄影总结视频互动版
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700;900&family=Noto+Sans+SC:wght@300;400;500;600&display=swap');

:root {
  /* Core dark palette */
  --bg-deep: #0A0A0A;
  --bg-primary: #111115;
  --bg-secondary: #18181C;
  --bg-card: linear-gradient(145deg, #1a1a1e 0%, #0f0f12 100%);
  --bg-glass: rgba(18, 18, 22, 0.85);

  /* Text */
  --text-primary: #F5F3EF;
  --text-secondary: #A8A4A0;
  --text-muted: #6B6860;

  /* Accent gold system */
  --gold-light: #D4A574;
  --gold-mid: #B8874E;
  --gold-dark: #8B6914;
  --gold-gradient: linear-gradient(135deg, #D4A574 0%, #B8874E 50%, #8B6914 100%);
  --gold-shimmer: linear-gradient(90deg, #fff 0%, #D4A574 25%, #fff 50%, #D4A574 75%, #fff 100%);
  --gold-glow: rgba(212, 165, 116, 0.35);
  --gold-subtle: rgba(212, 165, 116, 0.08);
  --sage: #7A9B7A;

  /* Borders & Shadows */
  --border-subtle: rgba(255,255,255,0.06);
  --border-hover: rgba(212,165,116,0.4);
  --shadow-card: 0 4px 24px rgba(0,0,0,.3), 0 1px 3px rgba(0,0,0,.15);
  --shadow-card-hover: 0 20px 60px rgba(0,0,0,.45), 0 10px 30px rgba(212,165,116,.12);
  --shadow-gold: 0 10px 40px rgba(212,165,116,.3);
  --shadow-elevated: 0 30px 80px rgba(0,0,0,.5);

  /* Radius */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* Transition */
  --ease-out-expo: cubic-bezier(.16,1,.3,1);
  --transition-fast: .25s var(--ease-out-expo);
  --transition-med: .4s var(--ease-out-expo);
  --transition-slow: .6s var(--ease-out-expo);

  /* Typography */
  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', serif;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --container-max: 1280px;
  --header-h: 72px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-deep);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--gold-light); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--gold-mid); text-shadow: 0 0 12px var(--gold-subtle); }
ul, ol { list-style: none; }

/* --- Premium Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--gold-gradient); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gold-mid); }
::selection { background: var(--gold-dark); color: #FFF; }

/* --- Utility --- */
.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 28px; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0; }

.section { padding: 100px 0; position: relative; }
.section-label {
  font-size: .78rem; color: var(--gold-light); letter-spacing: .25em;
  text-transform: uppercase; font-weight: 600; margin-bottom: 14px;
  display: flex; align-items: center; justify-content: center; gap: 12px;
}
.section-label::before, .section-label::after {
  content:''; width: 28px; height: 1px; background: var(--gold-gradient); opacity: .5;
}
.section-title {
  font-family: var(--font-serif); font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800; text-align: center; margin-bottom: 16px;
  letter-spacing: -.03em; line-height: 1.2;
}
.section-subtitle {
  text-align: center; color: var(--text-secondary); font-size: 1rem;
  max-width: 560px; margin: 0 auto 52px; line-height: 1.7;
}
.section-line {
  width: 70px; height: 3px; background: var(--gold-gradient);
  border-radius: 2px; margin: 0 auto 28px;
}
.section-desc {
  text-align: center; color: var(--text-muted); font-size: .95rem;
  max-width: 520px; margin: 0 auto 52px; line-height: 1.7;
}

/* ============================================
   HEADER / NAV — Glassmorphism
   ============================================ */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 20px 36px; display: flex; justify-content: space-between;
  align-items: center; transition: all var(--transition-med);
  background: transparent;
}
.header.scrolled {
  background: rgba(10,10,10,.92);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  padding: 14px 36px;
  box-shadow: 0 4px 30px rgba(0,0,0,.5);
  border-bottom: 1px solid var(--border-subtle);
}
.header-inner { width: 100%; max-width: var(--container-max); display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 14px; }
.logo-img { height: 40px; width: auto; filter: drop-shadow(0 2px 8px rgba(0,0,0,.3)); }
.logo-text {
  font-family: var(--font-serif); font-size: 1.25rem; font-weight: 700;
  background: var(--gold-gradient); -webkit-background-clip: text;
  -webkit-text-fill-color: transparent; background-clip: text;
  letter-spacing: -.01em;
}
.nav { display: none; }
.nav-list { display: flex; gap: 36px; align-items: center; }
.nav-link {
  font-size: .88rem; font-weight: 400; color: var(--text-secondary);
  position: relative; padding: 6px 0; transition: color var(--transition-fast);
}
.nav-link::after {
  content:''; position:absolute; bottom:-2px; left:0; width:0; height: 2px;
  background: var(--gold-gradient); border-radius: 1px; transition: width var(--transition-med);
}
.nav-link:hover, .nav-link.active { color: var(--gold-light); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.menu-toggle {
  display: flex; flex-direction: column; gap: 5px; cursor: pointer;
  background: none; border: none; padding: 8px 10px; border-radius: 10px;
  color: var(--text-primary); transition: background var(--transition-fast);
}
.menu-toggle:hover { background: rgba(255,255,255,.06); }
.menu-toggle span {
  display: block; width: 22px; height: 2px; background: var(--text-primary);
  transition: transform .3s, opacity .3s; border-radius: 1px;
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

@media (min-width: 960px) { .nav { display: block; } .menu-toggle { display: none; } }

.nav.open {
  display: flex; position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
  background: rgba(10,10,10,.97); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  padding: 24px 28px; flex-direction: column; gap: 0;
  border-top: 1px solid var(--border-subtle);
  box-shadow: 0 20px 60px rgba(0,0,0,.6); animation: slideDown .3s ease;
}
.nav.open .nav-list { flex-direction: column; gap: 0; }
.nav.open .nav-link {
  display: block; padding: 14px 16px; font-size: 1rem;
  border-radius: var(--radius-sm); background: rgba(255,255,255,.03);
  border: 1px solid var(--border-subtle); margin-bottom: 4px;
}
.nav.open .nav-link:hover { background: var(--gold-subtle); border-color: var(--border-hover); }
@keyframes slideDown { from{opacity:0;transform:translateY(-16px)} to{opacity:1;transform:translateY(0)} }

/* ============================================
   HERO — Cinematic full-screen
   ============================================ */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  justify-content: center; overflow: hidden;
  background: linear-gradient(135deg, #1a1a2e 0%, #0a0a0a 50%, #16213e 100%);
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('../img/activities/hero_bg.jpg') center/cover no-repeat;
  opacity: .22; mix-blend-mode: overlay; filter: saturate(.8);
  transform: scale(1.08); transition: transform 8s ease;
}
.hero:hover .hero-bg { transform: scale(1); }
.hero-overlay {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 65% 40%, transparent 0%, rgba(0,0,0,.75) 100%);
}
.hero-decor { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.hero-decor::before {
  content:''; position: absolute; top: 10%; right: 8%;
  width: 300px; height: 300px; border-radius: 50%;
  background: radial-gradient(circle, var(--gold-subtle) 0%, transparent 70%);
  animation: floatSlow 8s ease-in-out infinite;
}
.hero-decor::after {
  content:''; position: absolute; bottom: 15%; left: 5%;
  width: 200px; height: 200px; border-radius: 50%;
  background: radial-gradient(circle, rgba(122,155,122,.06) 0%, transparent 70%);
  animation: floatSlow 10s ease-in-out infinite reverse;
}
@keyframes floatSlow { 0%,100%{transform:translate(0,0)} 50%{transform:translate(-20px,20px)} }

.hero-content { position: relative; z-index: 10; text-align: center; padding: 0 28px; max-width: 720px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 30px;
  background: rgba(212,165,116,.1); border: 1px solid rgba(212,165,116,.2);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  color: var(--gold-light); font-size: .78rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; margin-bottom: 28px;
}
.hero-badge::before { content:'✦'; font-size:.7em; }
.hero-title {
  font-family: var(--font-serif); font-size: clamp(2.4rem, 7vw, 4.2rem);
  font-weight: 900; line-height: 1.1; margin-bottom: 20px;
  background: var(--gold-shimmer); background-size: 200% 100%;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  animation: shimmer 4s ease-in-out infinite;
}
@keyframes shimmer { 0%,100%{background-position:0% 50%} 50%{background-position:100% 50%} }
.hero-subtitle { font-size: clamp(.9rem, 2vw, 1.2rem); color: var(--text-muted); letter-spacing: .3em; margin-bottom: 12px; font-weight: 300; }
.hero-desc { font-size: clamp(.95rem, 2vw, 1.1rem); color: var(--text-secondary); line-height: 1.8; max-width: 520px; margin: 0 auto 38px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 15px 34px; border-radius: 50px; font-size: .9rem; font-weight: 500;
  cursor: pointer; border: none; transition: all var(--transition-med);
  position: relative; overflow: hidden;
}
.btn::before { content:''; position:absolute; inset:0; background: linear-gradient(135deg, rgba(255,255,255,.1), transparent); opacity:0; transition: opacity var(--transition-fast); }
.btn:hover::before { opacity: 1; }
.btn-primary { background: var(--gold-gradient); color: #FFF; box-shadow: var(--shadow-gold); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 48px rgba(212,165,116,.5); color:#FFF; }
.btn-outline { background: transparent; color: var(--text-primary); border: 1.5px solid rgba(255,255,255,.15); }
.btn-outline:hover { border-color: var(--gold-light); color: var(--gold-light); transform: translateY(-3px); box-shadow: 0 8px 28px rgba(212,165,116,.15); }
.btn-sm { padding: 10px 24px; font-size: .82rem; }

.hero-scroll { position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%); z-index: 10; display: flex; flex-direction: column; align-items: center; gap: 10px; color: var(--text-muted); font-size: .78rem; animation: bounce 2.5s infinite; }
.hero-scroll-bar { width: 20px; height: 32px; border: 1.5px solid rgba(255,255,255,.15); border-radius: 10px; position: relative; }
.hero-scroll-bar::before { content:''; position: absolute; top: 6px; left: 50%; transform: translateX(-50%); width: 3px; height: 8px; background: var(--gold-gradient); border-radius: 2px; animation: scrollDot 2.5s infinite; }
@keyframes bounce { 0%,100%{transform:translateX(-50%)translateY(0)} 50%{transform:translateX(-50%)translateY(10px)} }
@keyframes scrollDot { 0%{opacity:1;top:6px} 100%{opacity:0;top:16px} }

/* ============================================
   NEWS / DYNAMIC CARDS
   ============================================ */
.news-grid { display: grid; gap: 24px; }
.news-card {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-card);
  transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
  position: relative;
}
.news-card::after {
  content:''; position: absolute; inset: 0; border-radius: var(--radius-md);
  border: 1px solid transparent; transition: border-color var(--transition-fast);
  pointer-events: none;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card-hover); }
.news-card:hover::after { border-color: var(--border-hover); }
.news-card-img { aspect-ratio: 16/10; object-fit: cover; width: 100%; transition: transform .6s var(--ease-out-expo); }
.news-card:hover .news-card-img { transform: scale(1.05); }
.news-card-body { padding: 22px 24px 24px; }
.news-card-date {
  font-size: .76rem; color: var(--gold-light); font-weight: 600;
  text-transform: uppercase; letter-spacing: .04em; margin-bottom: 8px;
  display: flex; align-items: center; gap: 6px;
}
.news-card-title { font-family: var(--font-serif); font-size: 1.15rem; font-weight: 700; line-height: 1.4; margin-bottom: 10px; }
.news-card-desc { font-size: .88rem; color: var(--text-secondary); line-height: 1.65; }
.news-card-tag {
  display: inline-block; margin-top: 14px; padding: 4px 12px;
  background: var(--gold-subtle); color: var(--gold-light);
  font-size: .74rem; font-weight: 600; border-radius: 20px;
  border: 1px solid rgba(212,165,116,.15);
}

/* Video variant */
.news-card.video-card { position: relative; }
.video-play-icon {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 56px; height: 56px; background: rgba(255,255,255,.92);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 24px rgba(0,0,0,.3); transition: transform var(--transition-med); z-index: 2;
}
.video-play-icon::before {
  content: ''; width: 0; height: 0;
  border-left: 18px solid var(--gold-mid); border-top: 11px solid transparent;
  border-bottom: 11px solid transparent; margin-left: 4px;
}
.news-card.video-card:hover .video-play-icon { transform: translate(-50%,-50%) scale(1.12); }

/* ============================================
   STATS BAR
   ============================================ */
.stats-bar {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px;
  background: var(--border-subtle); border-radius: var(--radius-md); overflow: hidden;
  margin-top: 24px; border: 1px solid var(--border-subtle);
}
.stat-item { background: var(--bg-primary); padding: 36px 16px; text-align: center; position: relative; overflow: hidden; }
.stat-item::before { content:''; position:absolute; top:0; left:0; right:0; height:2px; background: var(--gold-gradient); opacity:.5; }
.stat-number {
  font-family: var(--font-serif); font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 900; background: var(--gold-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  line-height: 1.1;
}
.stat-label { font-size: .8rem; color: var(--text-muted); margin-top: 8px; letter-spacing: .02em; }
@media (min-width: 480px) { .stats-bar { grid-template-columns: repeat(4, 1fr); } }

/* ============================================
   GALLERY
   ============================================ */
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.gallery-item {
  position: relative; border-radius: var(--radius-sm); overflow: hidden;
  aspect-ratio: 4/3; cursor: pointer; box-shadow: var(--shadow-card);
  border: 1px solid var(--border-subtle);
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease-out-expo); }
.gallery-item:hover img { transform: scale(1.1); }
.gallery-overlay {
  position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,.75) 0%, transparent 55%);
  opacity: 0; transition: opacity var(--transition-med);
  display: flex; flex-direction: column; justify-content: flex-end; padding: 16px;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-overlay-title { color: #FFF; font-size: .9rem; font-weight: 600; font-family: var(--font-serif); }
.gallery-overlay-author { color: rgba(255,255,255,.7); font-size: .76rem; }

/* Gallery filter */
.gallery-filter { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 36px; }
.filter-btn {
  padding: 8px 20px; border-radius: 24px; font-size: .82rem; font-weight: 500;
  border: 1px solid var(--border-subtle); background: var(--bg-card); color: var(--text-secondary);
  cursor: pointer; transition: all var(--transition-fast);
}
.filter-btn.active, .filter-btn:hover { background: var(--gold-gradient); color: #FFF; border-color: transparent; box-shadow: var(--shadow-gold); }

/* Review cards */
.review-card {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-card);
  transition: transform var(--transition-med), box-shadow var(--transition-med);
}
.review-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card-hover); }
.review-card img { width: 100%; }

/* ============================================
   SERVICES / COURSES
   ============================================ */
.courses-grid { display: grid; gap: 20px; }
.course-card {
  display: flex; gap: 20px; background: var(--bg-card);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-md);
  padding: 28px 24px; box-shadow: var(--shadow-card); align-items: center;
  transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-fast);
  position: relative; overflow: hidden;
}
.course-card::before { content:''; position:absolute; left:0; top:0; bottom:0; width:3px; background: var(--gold-gradient); opacity:0; transition: opacity var(--transition-fast); }
.course-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); border-color: var(--border-hover); }
.course-card:hover::before { opacity: 1; }
.course-thumb { width: 72px; height: 72px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; border: 1px solid var(--border-subtle); }
.course-info h3 { font-family: var(--font-serif); font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.course-info p { font-size: .84rem; color: var(--text-secondary); line-height: 1.6; }
.course-tag {
  display: inline-block; margin-top: 10px; padding: 3px 12px;
  background: var(--sage); background: rgba(122,155,122,.15); color: var(--sage);
  font-size: .72rem; font-weight: 600; border-radius: 5px;
}

/* Vertical service cards (homepage) */
.course-card.col { flex-direction: column; text-align: center; padding: 36px 28px; }
.course-card.col .course-emoji { font-size: 2.6rem; margin-bottom: 10px; }
.course-card.col .course-info { text-align: center; }

/* Weekly 外拍 banner */
.weekly-banner {
  margin-top: 36px; padding: 26px 32px; background: var(--bg-card);
  border-radius: var(--radius-md); box-shadow: var(--shadow-card);
  display: flex; gap: 18px; align-items: center; flex-wrap: wrap;
  border: 1px solid var(--border-subtle); border-left: 3px solid var(--gold-mid);
}
.weekly-banner-icon { font-size: 2rem; }
.weekly-banner-text { flex: 1; min-width: 240px; }
.weekly-banner-text strong { display: block; font-family: var(--font-serif); font-size: 1.1rem; margin-bottom: 4px; }
.weekly-banner-text span { color: var(--text-secondary); font-size: .88rem; }

/* ============================================
   HISTORICAL / 往期精选
   ============================================ */
.history-section { background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-primary) 100%); }
.history-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.history-item {
  position: relative; border-radius: var(--radius-sm); overflow: hidden;
  aspect-ratio: 3/2; box-shadow: var(--shadow-card); border: 1px solid var(--border-subtle);
}
.history-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease-out-expo); }
.history-item:hover img { transform: scale(1.08); }
.history-caption {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 20px 16px 14px; background: linear-gradient(to top, rgba(0,0,0,.8), transparent);
  font-size: .8rem; color: #FFF; font-weight: 500;
}
.history-caption span { display: block; font-size: .72rem; color: var(--gold-light); margin-top: 2px; }
@media (min-width: 768px) { .history-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1024px) { .history-grid { grid-template-columns: repeat(4, 1fr); } }

/* ============================================
   TIMELINE (activities page)
   ============================================ */
.timeline { position: relative; padding-left: 32px; max-width: 860px; margin: 0 auto; }
.timeline::before { content: ''; position: absolute; left: 9px; top: 0; bottom: 0; width: 2px; background: var(--gold-gradient); opacity: .3; }
.timeline-item { position: relative; margin-bottom: 44px; }
.timeline-item::before {
  content: ''; position: absolute; left: -32px; top: 6px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--gold-gradient); border: 3px solid var(--bg-deep);
  box-shadow: 0 0 0 3px rgba(212,165,116,.2);
}
.timeline-date { font-size: .8rem; color: var(--gold-light); font-weight: 600; margin-bottom: 8px; letter-spacing: .03em; }
.timeline-title { font-family: var(--font-serif); font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.timeline-desc { color: var(--text-secondary); font-size: .92rem; line-height: 1.7; }
.timeline-images { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px,1fr)); gap: 10px; margin-top: 14px; }
.timeline-images img { border-radius: var(--radius-sm); aspect-ratio: 4/3; object-fit: cover; border: 1px solid var(--border-subtle); transition: transform var(--transition-fast); }
.timeline-images img:hover { transform: scale(1.03); }
.timeline-month { max-width: 860px; margin: 42px auto 22px; font-family: var(--font-serif); font-size: 1.35rem; font-weight: 700; color: var(--text-primary); padding-left: 14px; border-left: 4px solid var(--gold); }
.timeline-month:first-of-type { margin-top: 6px; }

/* ============================================
   VIDEOS
   ============================================ */
.video-grid { display: grid; gap: 24px; }
.video-card-large {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-card);
  transition: transform var(--transition-med), box-shadow var(--transition-med);
}
.video-card-large:hover { transform: translateY(-6px); box-shadow: var(--shadow-card-hover); }
.video-thumbnail-wrap { position: relative; aspect-ratio: 9/16; max-width: 440px; margin: 0 auto; overflow: hidden; background: var(--bg-secondary); }
.video-thumbnail-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease-out-expo); }
.video-card-large:hover .video-thumbnail-wrap img { transform: scale(1.06); }
.play-center {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 72px; height: 72px; background: rgba(255,255,255,.95);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 30px rgba(0,0,0,.25); transition: transform var(--transition-med);
}
.play-center::before { content: ''; width: 0; height: 0; border-left: 24px solid var(--gold-mid); border-top: 15px solid transparent; border-bottom: 15px solid transparent; margin-left: 5px; }
.video-card-large:hover .play-center { transform: translate(-50%,-50%) scale(1.12); }
.video-info { padding: 22px 26px 26px; }
.video-info h3 { font-family: var(--font-serif); font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.video-info p { font-size: .86rem; color: var(--text-secondary); line-height: 1.6; }
.video-meta { display: flex; gap: 16px; margin-top: 14px; font-size: .78rem; color: var(--text-muted); }
.video-meta span { display: flex; align-items: center; gap: 5px; }

/* ============================================
   CONTACT
   ============================================ */
.contact-grid { display: grid; gap: 28px; }
.contact-info-card {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 32px; box-shadow: var(--shadow-card);
}
.contact-info-card h3 { font-family: var(--font-serif); font-size: 1.15rem; margin-bottom: 18px; display: flex; align-items: center; gap: 8px; }
.contact-detail { display: flex; gap: 14px; margin-bottom: 16px; align-items: flex-start; }
.contact-icon {
  width: 42px; height: 42px; border-radius: var(--radius-sm); background: var(--gold-subtle);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  font-size: 1.1rem; border: 1px solid rgba(212,165,116,.15);
}
.contact-detail-text strong { display: block; font-size: .95rem; font-family: var(--font-serif); }
.contact-detail-text span { font-size: .82rem; color: var(--text-secondary); }
#map-container { width: 100%; height: 380px; border-radius: var(--radius-md); overflow: hidden; margin-top: 24px; border: 1px solid var(--border-subtle); }
@media (min-width: 768px) { .contact-grid { grid-template-columns: 1fr 1fr; } }

/* ============================================
   CTA BANNER
   ============================================ */
.cta-banner {
  background: linear-gradient(135deg, #1a1a2e 0%, #0a0a0a 50%, #16213e 100%);
  padding: 90px 20px; text-align: center; position: relative; overflow: hidden;
}
.cta-banner::before {
  content:''; position: absolute; top: -50%; left: 50%; transform: translateX(-50%);
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, var(--gold-subtle) 0%, transparent 70%);
}
.cta-banner h2 { color: #FFF; font-family: var(--font-serif); font-size: clamp(1.6rem,4vw,2.4rem); margin-bottom: 14px; position: relative; z-index: 2; }
.cta-banner p { color: rgba(255,255,255,.65); font-size: 1rem; margin-bottom: 30px; max-width: 480px; margin-left: auto; margin-right: auto; position: relative; z-index: 2; }
.cta-banner .hero-actions { position: relative; z-index: 2; }

/* ============================================
   FOOTER
   ============================================ */
.footer { background: var(--bg-deep); padding: 60px 0 28px; margin-top: 40px; border-top: 1px solid var(--border-subtle); }
.footer-grid { display: grid; gap: 36px; max-width: var(--container-max); margin: 0 auto; padding: 0 28px; }
.footer-brand .logo-text { margin-bottom: 14px; }
.footer-brand p { font-size: .85rem; line-height: 1.8; color: var(--text-muted); max-width: 300px; }
.footer-links h4 { color: var(--gold-light); font-size: .88rem; margin-bottom: 16px; font-family: var(--font-serif); letter-spacing: .05em; }
.footer-links ul li { margin-bottom: 10px; }
.footer-links a { color: var(--text-muted); font-size: .84rem; transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--gold-light); }
.footer-bottom { border-top: 1px solid var(--border-subtle); margin-top: 40px; padding-top: 24px; text-align: center; font-size: .78rem; color: var(--text-muted); }
.footer-qrcode { width: 96px; height: 96px; border-radius: var(--radius-sm); margin-top: 14px; border: 1px solid var(--border-subtle); }
@media (min-width: 600px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease-out-expo), transform .7s var(--ease-out-expo); }
.fade-in.visible { opacity: 1; transform: translateY(0); }
.slide-in-left { opacity: 0; transform: translateX(-30px); transition: all .6s var(--ease-out-expo); }
.slide-in-left.visible { opacity: 1; transform: translateX(0); }
.slide-in-right { opacity: 0; transform: translateX(30px); transition: all .6s var(--ease-out-expo); }
.slide-in-right.visible { opacity: 1; transform: translateX(0); }

.stagger-children > * { opacity: 0; transform: translateY(18px); transition: all .5s var(--ease-out-expo); }
.stagger-children.visible > *:nth-child(1) { transition-delay: .06s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: .12s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: .18s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: .24s; }
.stagger-children.visible > *:nth-child(5) { transition-delay: .3s; }
.stagger-children.visible > *:nth-child(6) { transition-delay: .36s; }
.stagger-children.visible > * { opacity: 1; transform: translateY(0); }

/* ============================================
   RESPONSIVE TWEAKS
   ============================================ */
@media (min-width: 768px) {
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 120px 0; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .history-section .history-grid { gap: 16px; }
}
@media (min-width: 1024px) {
  .news-grid { grid-template-columns: repeat(3, 1fr); }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .courses-grid { grid-template-columns: repeat(3, 1fr); }
}

/* Lightbox */
.lightbox-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.94); z-index: 9999; display: none; align-items: center; justify-content: center; cursor: zoom-out; }
.lightbox-overlay.active { display: flex; }
.lightbox-overlay img { max-width: 92vw; max-height: 92vh; object-fit: contain; border-radius: 6px; box-shadow: 0 20px 80px rgba(0,0,0,.6); }

/* Print */
@media print {
  .header, .hero-scroll, .menu-toggle, .btn { display: none !important; }
  .hero { min-height: auto; margin-top: 0; }
  body { color: #000; background: #FFF; }
}

/* ===== About page ===== */
.about-lead { font-size: 1.05rem; line-height: 1.9; color: var(--text-secondary); max-width: 820px; margin: 0 auto 8px; text-align: center; }
.teacher-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.teacher-card { background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 28px 22px; text-align: center; }
.teacher-avatar { width: 84px; height: 84px; border-radius: 50%; margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; font-family: var(--font-serif); font-size: 2rem; font-weight: 700; color: #1a1a1a; background: var(--gold-gradient); }
.teacher-name { font-family: var(--font-serif); font-size: 1.25rem; font-weight: 700; margin-bottom: 4px; }
.teacher-role { color: var(--gold-light); font-size: .85rem; font-weight: 600; margin-bottom: 12px; }
.teacher-bio { color: var(--text-secondary); font-size: .9rem; line-height: 1.7; }
.review-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.review-quote { background: var(--bg-card); border-left: 4px solid var(--gold); border-radius: var(--radius-md); padding: 22px 24px; }
.review-quote p { font-size: .95rem; line-height: 1.8; color: var(--text-primary); margin-bottom: 12px; }
.review-quote .who { font-size: .82rem; color: var(--text-muted); font-weight: 600; }
.social-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.social-card { display: flex; align-items: center; gap: 14px; background: var(--bg-card); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 16px 18px; text-decoration: none; color: var(--text-primary); transition: transform var(--transition-fast), border-color var(--transition-fast); }
.social-card:hover { transform: translateY(-3px); border-color: var(--gold); }
.social-icon { font-size: 1.6rem; }
.social-name { font-weight: 600; font-size: .95rem; }
.social-handle { font-size: .8rem; color: var(--text-muted); }

/* ============================================
   MOBILE FIXES — 2026-09-07（南京经验：最小改动、先证后修）
   ============================================ */
/* 修复：logo 横幅图固有 5537×697，高 40px 时宽 318px，小屏(390px)
   把 .logo-text 挤成一字宽竖排、压住汉堡菜单。
   图片本身已含完整品牌名 → 小屏隐藏冗余文字 + 限制图片宽度。
   断点 959px 与既有 .nav 断点(min-width:960px) 严格互补，不新造散点。 */
@media (max-width: 959px) {
  .logo-text { display: none; }
  .logo-img { max-width: min(64vw, 280px); height: auto; }
}

/* ===== MOBILE UX v2 — 2026-09-07 拥挤治理（基于全站量化体检） ===== */
@media (max-width: 959px) {
  /* 1. 触摸目标 ≥44px（iOS HIG；体检：每页 10-18 个目标过小，汉堡菜单仅 42x32） */
  .menu-toggle { min-width: 44px; min-height: 44px; align-items: center; justify-content: center; }
  .btn { min-height: 44px; }
  .btn-sm { min-height: 42px; }
  .filter-btn { min-height: 40px; padding: 10px 20px; }
  .nav-list a { min-height: 44px; display: flex; align-items: center; }
  /* 2. 小标签字号 11.5px → 13px（体检：<12px 标签单页最多 25 个） */
  .news-card-tag, .course-tag, .core-badge, .video-badge, .tag { font-size: .82rem; }
  /* 3. 页边距 28→20px（移动端标准值，390px 屏内容区 +16px） */
  .container { padding-left: 20px; padding-right: 20px; }
}
@media (max-width: 599px) {
  /* 4. 学员作品 3列→2列（390px 下每列仅 ~110px，全站最"挤"的元凶；
        600px 断点恢复 3 列，与既有 min-width:600px 规则衔接） */
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
}

/* ===== MOBILE UX v2 — 2026-09-07 拥挤治理（基于全站量化体检） ===== */
@media (max-width: 959px) {
  /* 1. 触摸目标 ≥44px（iOS HIG；体检：每页 10-18 个目标过小，汉堡菜单仅 42x32） */
  .menu-toggle { min-width: 44px; min-height: 44px; align-items: center; justify-content: center; }
  .btn { min-height: 44px; }
  .btn-sm { min-height: 42px; }
  .filter-btn { min-height: 40px; padding: 10px 20px; }
  .nav-list a { min-height: 44px; display: flex; align-items: center; }
  /* 2. 小标签字号 11.5px → 13px（体检：<12px 标签单页最多 25 个） */
  .news-card-tag, .course-tag, .core-badge, .video-badge, .tag { font-size: .82rem; }
  /* 3. 页边距 28→20px（移动端标准值，390px 屏内容区 +16px） */
  .container { padding-left: 20px; padding-right: 20px; }
}
@media (max-width: 599px) {
  /* 4. 学员作品 3列→2列（390px 下每列仅 ~110px，全站最"挤"的元凶；
        600px 断点恢复 3 列，与既有 min-width:600px 规则衔接） */
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
}