/* ===== 红桃视频 - 主样式文件 ===== */
/* 暗黑潮流·霓虹金紫·沉浸式科技娱乐风格 */

:root {
  --color-bg: #0a0a0f;
  --color-bg2: #0f0f1a;
  --color-bg3: #13131f;
  --color-gold: #d4a843;
  --color-gold-light: #f0c060;
  --color-purple: #8b3cf7;
  --color-purple-light: #a855f7;
  --color-neon: #e040fb;
  --color-text: #e8e8f0;
  --color-text-muted: #8888aa;
  --color-border: rgba(212,168,67,0.2);
  --color-card: rgba(255,255,255,0.04);
  --gradient-gold-purple: linear-gradient(135deg, #d4a843 0%, #8b3cf7 100%);
  --gradient-dark: linear-gradient(180deg, #0a0a0f 0%, #13131f 100%);
  --shadow-gold: 0 0 20px rgba(212,168,67,0.3);
  --shadow-purple: 0 0 20px rgba(139,60,247,0.3);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

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

a { color: var(--color-gold); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-gold-light); }

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

/* ===== 粒子背景 ===== */
#particles-canvas {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 0; opacity: 0.4;
}

/* ===== 导航 ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10,10,15,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.nav-wrap {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 64px;
}

.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.4rem; font-weight: 700;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-logo .logo-icon {
  width: 36px; height: 36px;
  background: var(--gradient-gold-purple);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; -webkit-text-fill-color: white;
  box-shadow: var(--shadow-gold);
}

.nav-menu { display: flex; align-items: center; gap: 4px; list-style: none; }

.nav-menu a {
  color: var(--color-text-muted); font-size: 0.9rem; padding: 8px 14px;
  border-radius: var(--radius-sm); transition: var(--transition);
}

.nav-menu a:hover, .nav-menu a.active {
  color: var(--color-gold); background: rgba(212,168,67,0.1);
}

.nav-btn {
  background: var(--gradient-gold-purple);
  color: #fff !important; padding: 8px 20px !important;
  border-radius: 20px !important; font-weight: 600 !important;
  box-shadow: var(--shadow-gold);
}

.nav-btn:hover { opacity: 0.9; transform: translateY(-1px); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--color-gold); border-radius: 2px; transition: var(--transition); }

/* ===== 搜索框 ===== */
.search-bar-wrap {
  background: var(--color-bg2);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 24px;
  position: sticky; top: 64px; z-index: 999;
}

.search-bar-inner {
  max-width: 800px; margin: 0 auto;
  display: flex; align-items: center; gap: 0;
  background: var(--color-bg3);
  border: 1px solid var(--color-border);
  border-radius: 30px; overflow: hidden;
  transition: var(--transition);
}

.search-bar-inner:focus-within {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(212,168,67,0.15);
}

.search-bar-inner input {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--color-text); font-size: 0.95rem; padding: 12px 20px;
}

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

.search-bar-inner button {
  background: var(--gradient-gold-purple);
  border: none; color: #fff; padding: 12px 24px;
  cursor: pointer; font-size: 0.9rem; font-weight: 600;
  transition: var(--transition);
}

.search-bar-inner button:hover { opacity: 0.9; }

/* ===== 主内容区 ===== */
main { padding-top: 110px; position: relative; z-index: 1; }

/* ===== Section 通用 ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--color-bg2); }

.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

.section-header { text-align: center; margin-bottom: 48px; }

.section-tag {
  display: inline-block;
  background: rgba(212,168,67,0.1);
  color: var(--color-gold);
  border: 1px solid rgba(212,168,67,0.3);
  padding: 4px 14px; border-radius: 20px;
  font-size: 0.8rem; font-weight: 600; letter-spacing: 1px;
  margin-bottom: 12px; text-transform: uppercase;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700; line-height: 1.3;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 12px;
}

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

/* ===== Hero Banner ===== */
.hero {
  min-height: 85vh; display: flex; align-items: center;
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #0a0a0f 0%, #1a0a2e 50%, #0a0a0f 100%);
}

.hero-bg {
  position: absolute; inset: 0;
  background-image: url('../images/banner_hero.jpg');
  background-size: cover; background-position: center;
  opacity: 0.25; z-index: 0;
}

.hero-overlay {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(139,60,247,0.2) 0%, transparent 70%);
  z-index: 1;
}

.hero-content {
  position: relative; z-index: 2;
  max-width: 1280px; margin: 0 auto; padding: 0 24px;
  text-align: center;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(212,168,67,0.1);
  border: 1px solid rgba(212,168,67,0.4);
  color: var(--color-gold); padding: 6px 16px;
  border-radius: 20px; font-size: 0.85rem; font-weight: 600;
  margin-bottom: 24px; animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(212,168,67,0.3); }
  50% { box-shadow: 0 0 25px rgba(212,168,67,0.6); }
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 800; line-height: 1.2;
  margin-bottom: 16px;
  text-shadow: 0 0 40px rgba(212,168,67,0.3);
}

.hero h1 .brand-name {
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted); max-width: 640px;
  margin: 0 auto 36px;
}

.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn-primary {
  background: var(--gradient-gold-purple);
  color: #fff; padding: 14px 32px;
  border-radius: 30px; font-weight: 700; font-size: 1rem;
  border: none; cursor: pointer; transition: var(--transition);
  box-shadow: 0 4px 20px rgba(139,60,247,0.4);
  display: inline-flex; align-items: center; gap: 8px;
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(139,60,247,0.5); color: #fff; }

.btn-secondary {
  background: transparent;
  color: var(--color-gold); padding: 14px 32px;
  border-radius: 30px; font-weight: 700; font-size: 1rem;
  border: 2px solid var(--color-gold); cursor: pointer; transition: var(--transition);
  display: inline-flex; align-items: center; gap: 8px;
}

.btn-secondary:hover {
  background: rgba(212,168,67,0.1); transform: translateY(-2px);
  color: var(--color-gold-light);
}

.hero-stats {
  display: flex; gap: 48px; justify-content: center;
  margin-top: 56px; flex-wrap: wrap;
}

.hero-stat { text-align: center; }

.hero-stat .num {
  font-size: 2rem; font-weight: 800;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat .label { color: var(--color-text-muted); font-size: 0.85rem; margin-top: 4px; }

/* ===== 视频卡片 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.video-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden; transition: var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-gold);
  box-shadow: 0 12px 40px rgba(212,168,67,0.2);
}

.video-thumb {
  position: relative; overflow: hidden;
  aspect-ratio: 16/9; background: #1a1a2e;
}

.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(0,0,0,0.4);
  opacity: 0; transition: var(--transition);
}

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

.play-icon {
  width: 56px; height: 56px;
  background: var(--gradient-gold-purple);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 30px rgba(212,168,67,0.5);
  transform: scale(0.8); transition: var(--transition);
}

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

.play-icon::after {
  content: ''; border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}

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

.video-info { padding: 16px; }

.video-title {
  font-size: 0.95rem; font-weight: 600; color: var(--color-text);
  margin-bottom: 8px; line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.video-meta {
  display: flex; gap: 12px; align-items: center;
  color: var(--color-text-muted); font-size: 0.8rem;
}

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

.video-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }

.tag {
  background: rgba(139,60,247,0.15);
  color: var(--color-purple-light);
  border: 1px solid rgba(139,60,247,0.3);
  padding: 2px 10px; border-radius: 12px; font-size: 0.75rem;
}

/* ===== 社区模块 ===== */
.community-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px;
}

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

.community-card:hover {
  border-color: var(--color-purple);
  box-shadow: var(--shadow-purple);
  transform: translateY(-4px);
}

.community-icon {
  width: 48px; height: 48px;
  background: rgba(139,60,247,0.15);
  border-radius: 12px; display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 16px;
}

.community-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.community-card .hot-topic { color: var(--color-gold); font-size: 0.85rem; margin-bottom: 10px; }
.community-card .posts { color: var(--color-text-muted); font-size: 0.8rem; }

/* ===== 弹幕展示 ===== */
.danmaku-wrap {
  overflow: hidden; height: 120px; position: relative;
  background: rgba(0,0,0,0.3); border-radius: var(--radius);
  border: 1px solid var(--color-border); margin-top: 32px;
}

.danmaku-track {
  display: flex; gap: 40px; align-items: center;
  white-space: nowrap; animation: danmaku-scroll 20s linear infinite;
  padding: 0 40px; height: 100%;
}

@keyframes danmaku-scroll {
  0% { transform: translateX(100%); }
  100% { transform: translateX(-100%); }
}

.danmaku-item {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(212,168,67,0.1);
  border: 1px solid rgba(212,168,67,0.2);
  color: var(--color-text); padding: 6px 16px; border-radius: 20px; font-size: 0.85rem;
}

/* ===== AI模块 ===== */
.ai-tools-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px;
}

.ai-tool-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 28px 20px;
  text-align: center; transition: var(--transition);
}

.ai-tool-card:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-gold);
  transform: translateY(-4px);
}

.ai-tool-icon {
  width: 64px; height: 64px; margin: 0 auto 16px;
  background: var(--gradient-gold-purple);
  border-radius: 16px; display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
}

.ai-tool-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.ai-tool-card p { color: var(--color-text-muted); font-size: 0.85rem; }

/* ===== 专家模块 ===== */
.experts-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 24px;
}

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

.expert-card:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-gold);
  transform: translateY(-4px);
}

.expert-avatar {
  width: 88px; height: 88px; margin: 0 auto 16px;
  border-radius: 50%; overflow: hidden;
  border: 3px solid transparent;
  background: var(--gradient-gold-purple);
  padding: 3px;
}

.expert-avatar img { border-radius: 50%; width: 100%; height: 100%; object-fit: cover; }

.expert-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.expert-card .title { color: var(--color-gold); font-size: 0.85rem; margin-bottom: 10px; }
.expert-card p { color: var(--color-text-muted); font-size: 0.82rem; }

/* ===== 用户评价 ===== */
.reviews-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px;
}

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

.review-card:hover { border-color: var(--color-purple); transform: translateY(-3px); }

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

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

.review-user { font-weight: 600; font-size: 0.95rem; }
.review-stars { color: var(--color-gold); font-size: 0.85rem; margin-top: 2px; }
.review-text { color: var(--color-text-muted); font-size: 0.88rem; line-height: 1.6; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }

.faq-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius); overflow: hidden;
  transition: var(--transition);
}

.faq-item.open { border-color: var(--color-gold); }

.faq-q {
  padding: 18px 24px; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 600; font-size: 0.95rem;
  transition: var(--transition);
}

.faq-q:hover { color: var(--color-gold); }

.faq-q .icon {
  width: 24px; height: 24px; border-radius: 50%;
  background: rgba(212,168,67,0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; transition: var(--transition); flex-shrink: 0;
}

.faq-item.open .faq-q .icon { transform: rotate(45deg); background: rgba(212,168,67,0.2); }

.faq-a {
  padding: 0 24px; max-height: 0; overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  color: var(--color-text-muted); font-size: 0.88rem;
}

.faq-item.open .faq-a { max-height: 200px; padding: 0 24px 18px; }

/* ===== 合作伙伴 ===== */
.partners-grid {
  display: flex; flex-wrap: wrap; gap: 16px; justify-content: center;
}

.partner-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); padding: 16px 28px;
  font-size: 0.9rem; font-weight: 600; color: var(--color-text-muted);
  transition: var(--transition);
}

.partner-item:hover { border-color: var(--color-gold); color: var(--color-gold); }

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

.contact-info h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 20px; }

.contact-item {
  display: flex; gap: 12px; align-items: flex-start;
  margin-bottom: 16px; color: var(--color-text-muted); font-size: 0.9rem;
}

.contact-item .ci-icon {
  width: 36px; height: 36px; border-radius: 8px;
  background: rgba(212,168,67,0.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; flex-shrink: 0;
}

.qr-grid { display: flex; gap: 20px; flex-wrap: wrap; }

.qr-item { text-align: center; }

.qr-box {
  width: 100px; height: 100px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; margin-bottom: 8px;
}

.qr-item p { font-size: 0.8rem; color: var(--color-text-muted); }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-bg2);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 24px;
}

.footer-top {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 40px; border-bottom: 1px solid var(--color-border);
  margin-bottom: 24px;
}

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

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

.footer-col h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 16px; color: var(--color-gold); }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: var(--color-text-muted); font-size: 0.85rem; }
.footer-col ul li a:hover { color: var(--color-gold); }

.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
  color: var(--color-text-muted); font-size: 0.8rem;
}

.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--color-card); border: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; color: var(--color-text-muted);
  transition: var(--transition);
}
.footer-social a:hover { border-color: var(--color-gold); color: var(--color-gold); }

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 12px 0; color: var(--color-text-muted); font-size: 0.85rem;
  display: flex; align-items: center; gap: 8px;
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-gold); }
.breadcrumb .sep { color: var(--color-border); }
.breadcrumb .current { color: var(--color-gold); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; position: fixed; top: 64px; left: 0; right: 0;
    background: var(--color-bg2); flex-direction: column; padding: 20px;
    border-bottom: 1px solid var(--color-border); gap: 4px; }
  .nav-menu.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 2rem; }
  .hero-stats { gap: 24px; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}

@media (max-width: 480px) {
  .hero-btns { flex-direction: column; align-items: center; }
  .btn-primary, .btn-secondary { width: 100%; max-width: 300px; justify-content: center; }
  .video-grid { grid-template-columns: 1fr; }
}

/* ===== 动画 ===== */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-gold); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-gold-light); }

/* ===== 内页Banner ===== */
.inner-banner {
  padding: 80px 0 60px;
  background: linear-gradient(135deg, #0a0a0f 0%, #1a0a2e 100%);
  text-align: center; position: relative; overflow: hidden;
}

.inner-banner::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(139,60,247,0.15) 0%, transparent 70%);
}

.inner-banner h1 {
  font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 800;
  background: var(--gradient-gold-purple);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 12px; position: relative;
}

.inner-banner p { color: var(--color-text-muted); max-width: 600px; margin: 0 auto; position: relative; }