/* =============================================
   17c一起草 - 主样式文件
   Brand Colors:
   Primary: #E8396A (Rose Pink)
   Secondary: #F5A623 (Warm Gold)
   Dark: #1A0A1E (Deep Purple-Black)
   Card BG: #2D1B3D (Dark Purple)
   Text: #F0E6FF (Light Lavender)
   Accent: #C850C0 (Magenta)
   ============================================= */

/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #E8396A;
  --primary-dark: #C02050;
  --secondary: #F5A623;
  --accent: #C850C0;
  --bg-dark: #0F0818;
  --bg-card: #1E1030;
  --bg-card2: #2A1545;
  --text-main: #F0E6FF;
  --text-muted: #A08CC0;
  --text-light: #D0B8F0;
  --border: rgba(232, 57, 106, 0.25);
  --gradient-main: linear-gradient(135deg, #E8396A 0%, #C850C0 50%, #F5A623 100%);
  --gradient-card: linear-gradient(180deg, #2A1545 0%, #1A0A2E 100%);
  --shadow-glow: 0 0 20px rgba(232, 57, 106, 0.3);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', '微软雅黑', 'Hiragino Sans GB', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--secondary);
}

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

ul { list-style: none; }

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
}

h1 { font-size: clamp(1.8rem, 4vw, 3rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.9rem; }

p { margin-bottom: 1rem; color: var(--text-light); }

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

.container-fluid { width: 100%; padding: 0 20px; }

/* === Section === */
.section {
  padding: 70px 0;
}

.section-sm { padding: 40px 0; }

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

.section-title h2 {
  position: relative;
  display: inline-block;
  padding-bottom: 16px;
  margin-bottom: 12px;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--gradient-main);
  border-radius: 2px;
}

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

.gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === Header / Navigation === */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 8, 24, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.site-logo img.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: cover;
}

.site-logo .logo-text {
  font-size: 1.3rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

/* Main Nav */
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  color: var(--text-light);
  font-size: 0.92rem;
  padding: 6px 14px;
  border-radius: 6px;
  transition: all var(--transition);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--primary);
  background: rgba(232, 57, 106, 0.1);
}

/* Search Bar */
.header-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 0 14px;
  height: 38px;
  min-width: 200px;
  max-width: 280px;
  flex: 1;
  transition: border-color var(--transition);
}

.header-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232,57,106,0.15);
}

.header-search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.88rem;
  width: 100%;
  padding: 0 8px;
}

.header-search input::placeholder { color: var(--text-muted); }

.header-search button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  padding: 0;
  transition: color var(--transition);
}

.header-search button:hover { color: var(--primary); }

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.btn-login {
  padding: 7px 18px;
  border: 1px solid var(--primary);
  border-radius: 20px;
  color: var(--primary);
  font-size: 0.88rem;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-login:hover {
  background: var(--primary);
  color: #fff;
}

.btn-join {
  padding: 7px 18px;
  background: var(--gradient-main);
  border-radius: 20px;
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
  transition: opacity var(--transition);
}

.btn-join:hover { opacity: 0.85; color: #fff; }

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition);
}

/* Search Dropdown */
.search-dropdown {
  display: none;
  position: absolute;
  top: 68px;
  left: 0;
  right: 0;
  background: rgba(15, 8, 24, 0.98);
  border-bottom: 1px solid var(--border);
  padding: 16px 20px;
  z-index: 999;
}

.search-dropdown.active { display: block; }

.search-dropdown-inner {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  gap: 10px;
}

.search-dropdown-inner input {
  flex: 1;
  background: rgba(255,255,255,0.07);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  color: var(--text-main);
  font-size: 0.95rem;
  outline: none;
}

.search-dropdown-inner input:focus { border-color: var(--primary); }

.search-dropdown-inner button {
  padding: 10px 20px;
  background: var(--primary);
  border: none;
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  font-size: 0.9rem;
}

/* === Breadcrumb === */
.breadcrumb {
  padding: 12px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { margin: 0 6px; }
.breadcrumb .current { color: var(--primary); }

/* === Hero Section === */
.hero-section {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-dark);
}

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

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(15,8,24,0.92) 0%, rgba(15,8,24,0.6) 50%, rgba(15,8,24,0.2) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 580px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232, 57, 106, 0.15);
  border: 1px solid rgba(232, 57, 106, 0.4);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 0.82rem;
  color: var(--primary);
  margin-bottom: 20px;
}

.hero-content h1 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 5vw, 3.5rem);
}

.hero-content p {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 30px;
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  gap: 30px;
  margin-bottom: 32px;
}

.hero-stat strong {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat span {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-main);
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: rgba(232,57,106,0.1);
  color: var(--primary);
}

.btn-sm {
  padding: 7px 16px;
  font-size: 0.85rem;
}

/* === Video Cards === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.video-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  border: 1px solid rgba(255,255,255,0.05);
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5), var(--shadow-glow);
  border-color: rgba(232,57,106,0.3);
}

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #111;
}

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

.video-card:hover .video-thumb img {
  transform: scale(1.06);
}

.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: background var(--transition);
}

.video-card:hover .video-play-btn {
  background: rgba(0,0,0,0.45);
}

.play-icon {
  width: 54px;
  height: 54px;
  background: rgba(232,57,106,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.7);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 20px rgba(232,57,106,0.5);
}

.video-card:hover .play-icon {
  opacity: 1;
  transform: scale(1);
}

.play-icon svg {
  width: 22px;
  height: 22px;
  fill: #fff;
  margin-left: 3px;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
}

.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.video-info {
  padding: 14px;
}

.video-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.video-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.video-author {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.author-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
}

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

/* === Category Tabs === */
.cat-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.cat-tab {
  padding: 7px 18px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.04);
  color: var(--text-muted);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--transition);
}

.cat-tab:hover,
.cat-tab.active {
  background: rgba(232,57,106,0.15);
  border-color: var(--primary);
  color: var(--primary);
}

/* === Feature Cards === */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  transition: all var(--transition);
  text-align: center;
}

.feature-card:hover {
  border-color: rgba(232,57,106,0.4);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: rgba(232,57,106,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 1.8rem;
}

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

.feature-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

/* === Expert Cards === */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}

.expert-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}

.expert-card:hover {
  border-color: rgba(232,57,106,0.4);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid var(--primary);
  box-shadow: 0 0 20px rgba(232,57,106,0.3);
}

.expert-name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.expert-role {
  font-size: 0.82rem;
  color: var(--primary);
  margin-bottom: 10px;
}

.expert-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.6;
}

.expert-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 16px;
}

.expert-tag {
  background: rgba(232,57,106,0.12);
  border: 1px solid rgba(232,57,106,0.3);
  color: var(--primary);
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 10px;
}

.expert-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

/* === Review Cards === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.review-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  padding: 22px;
  transition: all var(--transition);
}

.review-card:hover {
  border-color: rgba(232,57,106,0.3);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.review-user strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.review-user span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.review-stars {
  margin-left: auto;
  color: var(--secondary);
  font-size: 0.85rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
  margin: 0;
}

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

.faq-item {
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item.active { border-color: rgba(232,57,106,0.4); }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  cursor: pointer;
  background: rgba(255,255,255,0.03);
  transition: background var(--transition);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  user-select: none;
}

.faq-question:hover { background: rgba(232,57,106,0.07); }

.faq-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(232,57,106,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition), background var(--transition);
  color: var(--primary);
  font-size: 1rem;
  font-weight: 300;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding var(--transition);
  padding: 0 22px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 22px 18px;
}

/* === Stats Bar === */
.stats-bar {
  background: rgba(232,57,106,0.08);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 30px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* === Partners / Logo Wall === */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}

.partner-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 14px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition);
}

.partner-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(232,57,106,0.07);
}

/* === How-To Steps === */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
  position: relative;
}

.step-item {
  text-align: center;
  padding: 24px 16px;
  position: relative;
}

.step-num {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(232,57,106,0.4);
}

.step-item h4 {
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
}

/* === Contact Section === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info h3 {
  margin-bottom: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
  padding: 16px;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
}

.contact-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(232,57,106,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-item strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-item span {
  font-size: 0.92rem;
  color: var(--text-main);
}

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

.qr-item {
  text-align: center;
  padding: 20px;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.07);
}

.qr-item img {
  width: 130px;
  height: 130px;
  margin: 0 auto 10px;
  border-radius: 8px;
}

.qr-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
}

/* === Share Bar === */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.share-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 6px;
  font-size: 0.82rem;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.04);
  color: var(--text-light);
  cursor: pointer;
  transition: all var(--transition);
}

.share-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(232,57,106,0.08);
}

/* === Footer === */
#site-footer {
  background: #080412;
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

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

.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: all var(--transition);
}

.social-btn:hover {
  background: rgba(232,57,106,0.15);
  border-color: var(--primary);
  color: var(--primary);
}

.footer-col h5 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--text-main);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--primary); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--text-muted);
}

.footer-bottom a:hover { color: var(--primary); }

/* === Page Banner === */
.page-banner {
  background: linear-gradient(135deg, #1A0A2E 0%, #2D1B3D 100%);
  padding: 50px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(232,57,106,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.page-banner h1 {
  margin-bottom: 8px;
}

.page-banner p {
  color: var(--text-muted);
  margin: 0;
}

/* === Sidebar === */
.content-with-sidebar {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 30px;
  align-items: start;
}

.sidebar-widget {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 24px;
}

.sidebar-widget h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}

/* === Tags === */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 4px;
  transition: all var(--transition);
}

.tag:hover {
  background: rgba(232,57,106,0.12);
  border-color: var(--primary);
  color: var(--primary);
}

/* === Loading / Lazy === */
.lazy-img {
  opacity: 0;
  transition: opacity 0.4s ease;
}

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

/* === Pagination === */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 40px;
}

.page-btn {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--transition);
}

.page-btn:hover,
.page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* === Notice Bar === */
.notice-bar {
  background: linear-gradient(90deg, rgba(232,57,106,0.15), rgba(200,80,192,0.15));
  border-bottom: 1px solid rgba(232,57,106,0.2);
  padding: 8px 0;
  font-size: 0.82rem;
  color: var(--text-muted);
  overflow: hidden;
}

.notice-inner {
  display: flex;
  align-items: center;
  gap: 12px;
}

.notice-label {
  background: var(--primary);
  color: #fff;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
}

/* === Responsive === */
@media (max-width: 1100px) {
  .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .main-nav { display: none; }
  .menu-toggle { display: flex; }
  .header-search { min-width: 140px; }
  .contact-grid { grid-template-columns: 1fr; }
  .content-with-sidebar { grid-template-columns: 1fr; }
  .hero-section { min-height: 420px; }
}

@media (max-width: 768px) {
  .section { padding: 50px 0; }
  .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { gap: 20px; }
  .hero-stat strong { font-size: 1.3rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .qr-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .video-grid-4 { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .header-search { display: none; }
}

/* Mobile Nav Overlay */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
}

.mobile-nav.active { display: block; }

.mobile-nav-panel {
  position: absolute;
  top: 0;
  left: 0;
  width: 280px;
  height: 100%;
  background: #0F0818;
  border-right: 1px solid var(--border);
  padding: 24px;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
}

.mobile-nav.active .mobile-nav-panel {
  transform: translateX(0);
}

.mobile-nav-close {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 20px;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.4rem;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav-links a {
  padding: 12px 16px;
  border-radius: 8px;
  color: var(--text-light);
  font-size: 0.95rem;
  transition: all var(--transition);
}

.mobile-nav-links a:hover {
  background: rgba(232,57,106,0.1);
  color: var(--primary);
}

/* === Utility === */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.w-100 { width: 100%; }

/* === Highlight Band === */
.highlight-band {
  background: linear-gradient(135deg, rgba(232,57,106,0.12) 0%, rgba(200,80,192,0.08) 100%);
  border: 1px solid rgba(232,57,106,0.2);
  border-radius: var(--radius-lg);
  padding: 40px;
}

/* === App Download === */
.app-download {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.app-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  color: var(--text-main);
  transition: all var(--transition);
}

.app-btn:hover {
  border-color: var(--primary);
  background: rgba(232,57,106,0.1);
  color: var(--text-main);
}

.app-btn-icon { font-size: 1.5rem; }

.app-btn-text small {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.app-btn-text strong {
  font-size: 0.9rem;
}