/* ============================================
   91 - 原创样式表
   品牌：91 | 域名：njjwivv.cn
   配色：深紫黑+荧光青绿+樱粉
   ============================================ */

/* --- CSS变量 --- */
:root {
  --primary-dark: #1a0a2e;
  --accent-cyan: #00d4aa;
  --accent-pink: #ff3c7d;
  --bg-deep: #0d0d1a;
  --text-light: #e8e8f0;
  --card-bg: #1e1e3a;
  --card-hover: #2a2a50;
  --purple-mid: #7b2ff7;
  --gradient-main: linear-gradient(135deg, #00d4aa 0%, #7b2ff7 100%);
  --gradient-pink: linear-gradient(135deg, #ff3c7d 0%, #7b2ff7 100%);
  --shadow-glow: 0 0 20px rgba(0, 212, 170, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
  --max-width: 1280px;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

/* --- 重置 --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  background: var(--bg-deep);
  color: var(--text-light);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-cyan); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-pink); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; }

/* --- 容器 --- */
.syfyqd { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* --- 头部导航 --- */
.site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(13, 13, 26, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 212, 170, 0.12);
  transition: var(--transition);
}
.site-header.scrolled { background: rgba(13, 13, 26, 0.98); }
.fj56y4i {
  max-width: var(--max-width); margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between; height: 68px;
}
.rmrj9fxh { display: flex; align-items: center; gap: 10px; }
.rmrj9fxh img { height: 42px; width: auto; }
.zxcn3 { font-size: 1.3rem; font-weight: 800; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 8px 16px; border-radius: var(--radius-sm); font-size: 0.95rem;
  color: var(--text-light); font-weight: 500; transition: var(--transition);
  position: relative;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--accent-cyan);
  background: rgba(0, 212, 170, 0.08);
}
.main-nav a.active::after {
  content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 2px; background: var(--accent-cyan); border-radius: 1px;
}

.mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--text-light); margin: 5px 0; transition: var(--transition); border-radius: 2px; }

/* --- 搜索栏 --- */
.tv6fw {
  background: rgba(30, 30, 58, 0.6);
  border-bottom: 1px solid rgba(0, 212, 170, 0.08);
  padding: 12px 0;
  margin-top: 68px;
}
.search-bar {
  max-width: 640px; margin: 0 auto; display: flex; gap: 0;
  border-radius: 50px; overflow: hidden;
  border: 1px solid rgba(0, 212, 170, 0.2);
  background: var(--card-bg);
}
.search-bar input {
  flex: 1; padding: 12px 24px; border: none; outline: none;
  background: transparent; color: var(--text-light); font-size: 0.95rem;
  font-family: var(--font-main);
}
.search-bar input::placeholder { color: rgba(232, 232, 240, 0.4); }
.search-bar button {
  padding: 12px 28px; border: none; cursor: pointer;
  background: var(--gradient-main); color: #fff; font-weight: 600;
  font-size: 0.95rem; transition: var(--transition);
}
.search-bar button:hover { opacity: 0.9; }

/* --- Hero区域 --- */
.ay5pwrek {
  position: relative; min-height: 520px; display: flex; align-items: center;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(13,13,26,0.3) 0%, var(--bg-deep) 100%);
}
.d98p7l9t {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: 0.35; z-index: 0;
}
.b95wwx4 {
  position: relative; z-index: 2; text-align: center; width: 100%;
  padding: 80px 20px 60px;
}
.b95wwx4 h1 {
  font-size: 2.8rem; margin-bottom: 16px;
  background: var(--gradient-main);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.b95wwx4 h1 span { display: block; font-size: 1.1rem; color: var(--text-light); -webkit-text-fill-color: var(--text-light); margin-top: 8px; font-weight: 400; }
.b95wwx4 p { font-size: 1.1rem; color: rgba(232,232,240,0.8); max-width: 680px; margin: 0 auto 30px; }
.qp0x0 { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 20px; }
.qp0x0 span {
  padding: 6px 18px; border-radius: 50px; font-size: 0.85rem;
  background: rgba(0, 212, 170, 0.1); border: 1px solid rgba(0, 212, 170, 0.2);
  color: var(--accent-cyan);
}

/* --- 按钮 --- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: 50px; font-weight: 600;
  font-size: 0.95rem; transition: var(--transition); cursor: pointer;
  border: none; font-family: var(--font-main);
}
.r1u3g { background: var(--gradient-main); color: #fff; }
.r1u3g:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,212,170,0.25); color: #fff; }
.vgca6e {
  background: transparent; color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
}
.vgca6e:hover { background: rgba(0,212,170,0.1); color: var(--accent-cyan); }
.jok4dv { background: var(--gradient-pink); color: #fff; }
.jok4dv:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,60,125,0.25); color: #fff; }

/* --- 区块标题 --- */
.cqnbt {
  text-align: center; margin-bottom: 48px;
}
.cqnbt h2 {
  font-size: 2rem; margin-bottom: 12px;
  background: var(--gradient-main);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.cqnbt p { color: rgba(232,232,240,0.6); font-size: 1rem; }

/* --- 通用区块 --- */
.section { padding: 80px 0; }
.gfemi6 { background: rgba(30, 30, 58, 0.3); }

/* --- 视频卡片网格 --- */
.maacv8pq {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.e1pqgh {
  background: var(--card-bg); border-radius: var(--radius);
  overflow: hidden; transition: var(--transition);
  border: 1px solid rgba(0,212,170,0.06);
}
.e1pqgh:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(0,212,170,0.15);
}
.gq55wx {
  position: relative; padding-top: 56.25%; overflow: hidden;
  background: var(--primary-dark);
}
.gq55wx img {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; transition: transform 0.5s ease;
}
.e1pqgh:hover .gq55wx img { transform: scale(1.05); }
.play-btn {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 60px; height: 60px; border-radius: 50%;
  background: rgba(0, 212, 170, 0.85); display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: var(--transition); cursor: pointer;
  box-shadow: 0 0 30px rgba(0, 212, 170, 0.4);
}
.play-btn::after {
  content: ''; display: block; width: 0; height: 0;
  border-style: solid; border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 3px;
}
.e1pqgh:hover .play-btn { opacity: 1; }
.vx3efaf { padding: 16px 18px; }
.vx3efaf h3 { font-size: 1rem; margin-bottom: 8px; color: var(--text-light); line-height: 1.4; }
.gwgmjl { display: flex; align-items: center; gap: 16px; font-size: 0.82rem; color: rgba(232,232,240,0.5); }
.gwgmjl span { display: flex; align-items: center; gap: 4px; }
.video-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.video-tags span {
  font-size: 0.75rem; padding: 3px 10px; border-radius: 50px;
  background: rgba(123, 47, 247, 0.15); color: var(--purple-mid);
}
.zvzq86o4 {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75); color: #fff; padding: 2px 8px;
  border-radius: 4px; font-size: 0.78rem;
}

/* --- 专家卡片 --- */
.z0xd5n { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.ha8mh {
  background: var(--card-bg); border-radius: var(--radius); padding: 32px 24px;
  text-align: center; transition: var(--transition);
  border: 1px solid rgba(0,212,170,0.06);
}
.ha8mh:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.rp43s {
  width: 100px; height: 100px; border-radius: 50%; margin: 0 auto 16px;
  overflow: hidden; border: 3px solid var(--accent-cyan);
}
.rp43s img { width: 100%; height: 100%; object-fit: cover; }
.ha8mh h4 { font-size: 1.1rem; margin-bottom: 4px; }
.btpyha { color: var(--accent-cyan); font-size: 0.88rem; margin-bottom: 12px; }
.ma63u { font-size: 0.88rem; color: rgba(232,232,240,0.6); margin-bottom: 16px; line-height: 1.6; }
.lyeda { display: flex; justify-content: center; gap: 10px; }
.lyeda .btn { padding: 8px 18px; font-size: 0.85rem; }

/* --- FAQ --- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--card-bg); border-radius: var(--radius-sm); margin-bottom: 12px;
  border: 1px solid rgba(0,212,170,0.06); overflow: hidden;
}
.faq-question {
  padding: 18px 24px; cursor: pointer; display: flex;
  justify-content: space-between; align-items: center;
  font-weight: 600; font-size: 0.98rem; transition: var(--transition);
}
.faq-question:hover { color: var(--accent-cyan); }
.faq-question .arrow { transition: transform 0.3s; font-size: 1.2rem; color: var(--accent-cyan); }
.faq-item.active .faq-question .arrow { transform: rotate(180deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
  padding: 0 24px;
}
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 18px; }
.faq-answer p { font-size: 0.92rem; color: rgba(232,232,240,0.7); line-height: 1.7; }

/* --- 用户评价 --- */
.uby93d { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.ird6lr {
  background: var(--card-bg); border-radius: var(--radius); padding: 24px;
  border: 1px solid rgba(0,212,170,0.06); transition: var(--transition);
}
.ird6lr:hover { border-color: rgba(0,212,170,0.15); }
.b4m6dqy5 { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.lyf3bb {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--gradient-main); display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem; color: #fff;
}
.b9npf { font-weight: 600; font-size: 0.95rem; }
.utydgl { font-size: 0.8rem; color: rgba(232,232,240,0.4); }
.npghtgu { color: #ffd700; font-size: 0.9rem; margin-bottom: 10px; }
.djsmms35 { font-size: 0.9rem; color: rgba(232,232,240,0.7); line-height: 1.7; }

/* --- 合作品牌墙 --- */
.ol5ob89q { display: flex; flex-wrap: wrap; justify-content: center; gap: 32px; align-items: center; }
.ol5ob89q .c9ih0g {
  padding: 16px 28px; background: var(--card-bg); border-radius: var(--radius-sm);
  font-size: 1.1rem; font-weight: 700; color: rgba(232,232,240,0.5);
  border: 1px solid rgba(0,212,170,0.06); transition: var(--transition);
}
.ol5ob89q .c9ih0g:hover { color: var(--accent-cyan); border-color: rgba(0,212,170,0.2); }

/* --- How-To指南 --- */
.jzv8l6xz { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 24px; }
.lzzz1 {
  background: var(--card-bg); border-radius: var(--radius); padding: 28px 24px;
  text-align: center; border: 1px solid rgba(0,212,170,0.06);
  transition: var(--transition);
}
.lzzz1:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.hhgnngp6 {
  width: 48px; height: 48px; border-radius: 50%; margin: 0 auto 16px;
  background: var(--gradient-main); display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.2rem; color: #fff;
}
.lzzz1 h4 { margin-bottom: 8px; font-size: 1.05rem; }
.lzzz1 p { font-size: 0.88rem; color: rgba(232,232,240,0.6); }

/* --- 联系信息 --- */
.k1dvx { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.at706 {
  background: var(--card-bg); border-radius: var(--radius); padding: 28px;
  border: 1px solid rgba(0,212,170,0.06);
}
.at706 h4 { color: var(--accent-cyan); margin-bottom: 14px; font-size: 1.05rem; }
.at706 p { font-size: 0.92rem; color: rgba(232,232,240,0.7); margin-bottom: 8px; }

/* --- 社交分享 --- */
.hw3qj { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 30px; }
.share-btn {
  padding: 10px 22px; border-radius: 50px; font-size: 0.88rem;
  font-weight: 600; transition: var(--transition); cursor: pointer; border: none;
  color: #fff;
}
.jn3xf { background: #07c160; }
.w00ri6 { background: #e6162d; }
.g13bc { background: #161823; border: 1px solid rgba(255,255,255,0.15); }
.nxjz9l0 { background: #00a1d6; }
.share-btn:hover { transform: translateY(-2px); opacity: 0.9; }

/* --- 页脚 --- */
.site-footer {
  background: var(--primary-dark); padding: 48px 0 24px;
  border-top: 1px solid rgba(0,212,170,0.08);
}
.sotf0u4d {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px; margin-bottom: 36px;
}
.h9vw6w h5 { color: var(--accent-cyan); margin-bottom: 16px; font-size: 1rem; }
.h9vw6w p, .h9vw6w a { font-size: 0.88rem; color: rgba(232,232,240,0.6); display: block; margin-bottom: 8px; }
.h9vw6w a:hover { color: var(--accent-cyan); }
.tmvm0h { display: flex; gap: 20px; }
.tmvm0h .d2npc { text-align: center; }
.tmvm0h .d2npc img { width: 110px; height: 110px; border-radius: var(--radius-sm); margin-bottom: 6px; }
.tmvm0h .d2npc span { font-size: 0.8rem; color: rgba(232,232,240,0.5); }
.s3di5o8m {
  text-align: center; padding-top: 24px;
  border-top: 1px solid rgba(0,212,170,0.06);
  font-size: 0.85rem; color: rgba(232,232,240,0.4);
}
.s3di5o8m a { color: var(--accent-cyan); }

/* --- 面包屑 --- */
.cfns8 {
  padding: 14px 0; font-size: 0.88rem; color: rgba(232,232,240,0.5);
}
.cfns8 a { color: var(--accent-cyan); }
.cfns8 span { margin: 0 8px; }

/* --- 内页Banner --- */
.eri9g1f {
  padding: 100px 0 50px; text-align: center;
  background: linear-gradient(180deg, rgba(26,10,46,0.8) 0%, var(--bg-deep) 100%);
}
.eri9g1f h1 { font-size: 2.2rem; margin-bottom: 12px; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.eri9g1f p { color: rgba(232,232,240,0.6); font-size: 1rem; }

/* --- 标签云 --- */
.xx63rxy { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
.xx63rxy a {
  padding: 5px 14px; border-radius: 50px; font-size: 0.82rem;
  background: rgba(123,47,247,0.12); color: var(--purple-mid);
  border: 1px solid rgba(123,47,247,0.15); transition: var(--transition);
}
.xx63rxy a:hover { background: rgba(123,47,247,0.25); color: #fff; }

/* --- 特色模块网格 --- */
.no9gqv { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }
.zx5iev {
  background: var(--card-bg); border-radius: var(--radius); padding: 28px;
  border: 1px solid rgba(0,212,170,0.06); transition: var(--transition);
}
.zx5iev:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); border-color: rgba(0,212,170,0.15); }
.rb2rj {
  width: 56px; height: 56px; border-radius: 14px; margin-bottom: 16px;
  background: var(--gradient-main); display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
}
.zx5iev h4 { margin-bottom: 10px; font-size: 1.05rem; }
.zx5iev p { font-size: 0.88rem; color: rgba(232,232,240,0.6); line-height: 1.6; }

/* --- 数据统计 --- */
.ivw4od {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 40px;
  padding: 40px 0;
}
.b87ot0 { text-align: center; }
.flgxqi {
  font-size: 2.4rem; font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.vqq9q { font-size: 0.9rem; color: rgba(232,232,240,0.5); margin-top: 4px; }

/* --- MCP前端占位 --- */
.fayglu {
  background: var(--card-bg); border-radius: var(--radius); padding: 24px;
  border: 1px solid rgba(0,212,170,0.1); text-align: center;
  margin-top: 20px;
}
.fayglu p { font-size: 0.88rem; color: rgba(232,232,240,0.5); }

/* --- 响应式 --- */
@media (max-width: 768px) {
  .fj56y4i { height: 58px; }
  .rmrj9fxh img { height: 34px; }
  .main-nav { 
    display: none; position: fixed; top: 58px; left: 0; width: 100%;
    background: rgba(13,13,26,0.98); flex-direction: column; padding: 20px;
    gap: 4px; border-bottom: 1px solid rgba(0,212,170,0.1);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; width: 100%; }
  .mobile-toggle { display: block; }
  .tv6fw { margin-top: 58px; }
  .b95wwx4 h1 { font-size: 1.8rem; }
  .b95wwx4 { padding: 50px 16px 40px; }
  .ay5pwrek { min-height: 400px; }
  .section { padding: 50px 0; }
  .cqnbt h2 { font-size: 1.5rem; }
  .maacv8pq { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
  .sotf0u4d { grid-template-columns: 1fr 1fr; }
  .ivw4od { gap: 24px; }
  .flgxqi { font-size: 1.8rem; }
  .z0xd5n { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .maacv8pq { grid-template-columns: 1fr; }
  .sotf0u4d { grid-template-columns: 1fr; }
  .b95wwx4 h1 { font-size: 1.5rem; }
  .uby93d { grid-template-columns: 1fr; }
  .jzv8l6xz { grid-template-columns: 1fr; }
  .k1dvx { grid-template-columns: 1fr; }
}

/* --- 懒加载占位 --- */
img[data-src] { opacity: 0; transition: opacity 0.5s; }
img[data-src].loaded { opacity: 1; }

/* --- 动画 --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.6s ease forwards; }