/* ============================================
   小马拉大车 - 小排量大改装的视频传奇 原创样式表
   配色方案：赛车橙 #FF5722 + 深空灰 #2D2018 + 钛金灰 #2D2D44
   域名：aosea.cn
   ============================================ */

/* === 基础重置与全局 === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#e0e0e0;background:#1a1210;line-height:1.75;overflow-x:hidden}
a{color:#ff5722;text-decoration:none;transition:color .3s}
a:hover{color:#ff7f4a}
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;color:#ffffff}

/* === 容器 === */
.kkt-container{max-width:1280px;margin:0 auto;padding:0 20px}
.kkt-container-wide{max-width:1440px;margin:0 auto;padding:0 24px}

/* === 顶部导航 === */
.kkt-topbar{background:linear-gradient(180deg,#1a1210 0%,#2d2018 100%);border-bottom:2px solid #ff5722;position:sticky;top:0;z-index:1000;backdrop-filter:blur(12px)}
.kkt-topbar-inner{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1440px;margin:0 auto;padding:0 24px}
.kkt-logo-wrap{display:flex;align-items:center;gap:10px}
.kkt-logo-wrap img{height:46px;width:auto}
.kkt-logo-text{font-size:22px;font-weight:800;color:#ff5722;letter-spacing:1px}
.kkt-logo-text span{color:#ffffff;font-size:13px;display:block;font-weight:400;letter-spacing:0}

.kkt-nav{display:flex;align-items:center;gap:6px}
.kkt-nav a{color:#c8c8d4;font-size:14.5px;padding:8px 14px;border-radius:6px;transition:all .3s;font-weight:500}
.kkt-nav a:hover,.kkt-nav a.active{color:#ff5722;background:rgba(255,107,0,.1)}

.kkt-nav-toggle{display:none;background:none;border:none;color:#ff5722;font-size:26px;cursor:pointer}

/* === 搜索框 === */
.kkt-search-bar{background:#2d2018;padding:12px 0;border-bottom:1px solid #2d2d44}
.kkt-search-wrap{display:flex;align-items:center;max-width:680px;margin:0 auto;gap:10px}
.kkt-search-wrap input{flex:1;height:42px;background:#1a1210;border:1px solid #3a3a54;border-radius:22px;padding:0 20px;color:#e0e0e0;font-size:14px;outline:none;transition:border-color .3s}
.kkt-search-wrap input:focus{border-color:#ff5722}
.kkt-search-wrap input::placeholder{color:#6a6a80}
.kkt-search-btn{height:42px;padding:0 28px;background:linear-gradient(135deg,#ff5722,#ff7f4a);color:#fff;border:none;border-radius:22px;font-size:14px;cursor:pointer;font-weight:600;transition:transform .2s}
.kkt-search-btn:hover{transform:scale(1.05)}

/* === Hero区域 === */
.kkt-hero{position:relative;height:520px;overflow:hidden;display:flex;align-items:center;justify-content:center}
.kkt-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.45)}
.kkt-hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(13,13,26,.3) 0%,rgba(13,13,26,.85) 100%)}
.kkt-hero-content{position:relative;z-index:2;text-align:center;padding:0 20px}
.kkt-hero-content h1{font-size:42px;margin-bottom:12px;text-shadow:0 2px 20px rgba(255,107,0,.3)}
.kkt-hero-content h1 em{font-style:normal;color:#ff5722}
.kkt-hero-content p{font-size:18px;color:#b0b0c4;max-width:700px;margin:0 auto 24px}
.kkt-hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:16px}
.kkt-hero-tags span{background:rgba(255,107,0,.15);color:#ff7f4a;padding:6px 16px;border-radius:20px;font-size:13px;border:1px solid rgba(255,107,0,.3)}
.kkt-hero-cta{display:inline-block;margin-top:24px;padding:14px 40px;background:linear-gradient(135deg,#ff5722,#e55a00);color:#fff;border-radius:30px;font-size:16px;font-weight:700;transition:all .3s;box-shadow:0 4px 20px rgba(255,107,0,.4)}
.kkt-hero-cta:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(255,107,0,.5);color:#fff}

/* === 面包屑 === */
.kkt-breadcrumb{padding:14px 0;font-size:13px;color:#6a6a80}
.kkt-breadcrumb a{color:#8a8a9e}
.kkt-breadcrumb a:hover{color:#ff5722}
.kkt-breadcrumb span{margin:0 6px}

/* === 区块标题 === */
.kkt-section{padding:50px 0}
.kkt-section:nth-child(even){background:#12121f}
.kkt-section-header{text-align:center;margin-bottom:40px}
.kkt-section-header h2{font-size:30px;margin-bottom:8px}
.kkt-section-header h2 em{font-style:normal;color:#ff5722}
.kkt-section-header p{color:#8a8a9e;font-size:15px;max-width:600px;margin:0 auto}
.kkt-section-header .kkt-line{width:60px;height:3px;background:linear-gradient(90deg,#ff5722,#ff7f4a);margin:12px auto 0;border-radius:2px}

/* === 视频卡片网格 === */
.kkt-video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.kkt-video-card{background:#2d2018;border-radius:12px;overflow:hidden;transition:all .35s;border:1px solid #2d2d44;position:relative}
.kkt-video-card:hover{transform:translateY(-6px);border-color:#ff5722;box-shadow:0 12px 40px rgba(255,107,0,.15)}
.kkt-video-thumb{position:relative;padding-top:56.25%;overflow:hidden}
.kkt-video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.kkt-video-card:hover .kkt-video-thumb img{transform:scale(1.08)}
.kkt-video-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.45);opacity:0;transition:opacity .3s}
.kkt-video-card:hover .kkt-video-play{opacity:1}
.kkt-video-play-btn{width:56px;height:56px;background:rgba(255,107,0,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s}
.kkt-video-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}
.kkt-video-card:hover .kkt-video-play-btn{transform:scale(1.15)}
.kkt-video-duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:2px 8px;border-radius:4px;font-size:12px}
.kkt-video-info{padding:14px 16px}
.kkt-video-info h3{font-size:15px;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}
.kkt-video-meta{display:flex;align-items:center;gap:12px;font-size:12px;color:#6a6a80}
.kkt-video-meta span{display:flex;align-items:center;gap:4px}
.kkt-video-tag{display:inline-block;background:rgba(255,107,0,.12);color:#ff7f4a;padding:2px 8px;border-radius:4px;font-size:11px;margin-top:8px}

/* === 分类标签栏 === */
.kkt-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px;justify-content:center}
.kkt-tabs a{padding:8px 20px;background:#2d2018;color:#b0b0c4;border-radius:20px;font-size:13.5px;border:1px solid #2d2d44;transition:all .3s}
.kkt-tabs a:hover,.kkt-tabs a.active{background:linear-gradient(135deg,#ff5722,#ff7f4a);color:#fff;border-color:#ff5722}

/* === 专家卡片 === */
.kkt-expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.kkt-expert-card{background:#2d2018;border-radius:14px;padding:28px 20px;text-align:center;border:1px solid #2d2d44;transition:all .35s}
.kkt-expert-card:hover{border-color:#ff5722;transform:translateY(-4px)}
.kkt-expert-avatar{width:90px;height:90px;border-radius:50%;margin:0 auto 14px;overflow:hidden;border:3px solid #ff5722}
.kkt-expert-avatar img{width:100%;height:100%;object-fit:cover}
.kkt-expert-card h4{font-size:17px;margin-bottom:4px}
.kkt-expert-card .kkt-expert-title{color:#ff7f4a;font-size:13px;margin-bottom:10px}
.kkt-expert-card p{font-size:13px;color:#8a8a9e;line-height:1.6;margin-bottom:14px}
.kkt-expert-btns{display:flex;gap:8px;justify-content:center}
.kkt-expert-btns a{padding:6px 16px;border-radius:18px;font-size:12px;border:1px solid #ff5722;color:#ff5722;transition:all .3s}
.kkt-expert-btns a:hover{background:#ff5722;color:#fff}

/* === FAQ === */
.kkt-faq-list{max-width:800px;margin:0 auto}
.kkt-faq-item{background:#2d2018;border-radius:10px;margin-bottom:12px;border:1px solid #2d2d44;overflow:hidden}
.kkt-faq-q{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:15px;transition:color .3s}
.kkt-faq-q:hover{color:#ff5722}
.kkt-faq-q::after{content:"+";font-size:22px;color:#ff5722;transition:transform .3s}
.kkt-faq-item.open .kkt-faq-q::after{transform:rotate(45deg)}
.kkt-faq-a{padding:0 20px;max-height:0;overflow:hidden;transition:all .4s;color:#8a8a9e;font-size:14px;line-height:1.8}
.kkt-faq-item.open .kkt-faq-a{padding:0 20px 16px;max-height:500px}

/* === 用户评价 === */
.kkt-review-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.kkt-review-card{background:#2d2018;border-radius:12px;padding:24px;border:1px solid #2d2d44}
.kkt-review-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.kkt-review-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,#ff5722,#ff7f4a);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px}
.kkt-review-name{font-weight:600;font-size:15px}
.kkt-review-stars{color:#ff5722;font-size:13px;margin-top:2px}
.kkt-review-card p{color:#b0b0c4;font-size:14px;line-height:1.7}
.kkt-review-date{color:#6a6a80;font-size:12px;margin-top:10px}

/* === 合作品牌 === */
.kkt-partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center;padding:20px 0}
.kkt-partner-item{background:#2d2018;border-radius:10px;padding:16px 28px;border:1px solid #2d2d44;font-size:16px;font-weight:700;color:#6a6a80;transition:all .3s}
.kkt-partner-item:hover{border-color:#ff5722;color:#ff5722}

/* === How-To指南 === */
.kkt-howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.kkt-howto-step{background:#2d2018;border-radius:12px;padding:28px 20px;text-align:center;border:1px solid #2d2d44;position:relative;counter-increment:step}
.kkt-howto-step::before{content:counter(step);display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:linear-gradient(135deg,#ff5722,#ff7f4a);border-radius:50%;color:#fff;font-weight:800;font-size:18px;margin:0 auto 14px}
.kkt-howto-step h4{margin-bottom:8px;font-size:16px}
.kkt-howto-step p{color:#8a8a9e;font-size:13px;line-height:1.6}

/* === 联系我们 === */
.kkt-contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.kkt-contact-block{background:#2d2018;border-radius:12px;padding:28px;border:1px solid #2d2d44;text-align:center}
.kkt-contact-block h4{font-size:17px;margin-bottom:14px;color:#ff5722}
.kkt-contact-block p{color:#8a8a9e;font-size:14px;line-height:1.7}
.kkt-contact-block img{max-width:140px;margin:12px auto 0;border-radius:8px}

/* === 社交分享 === */
.kkt-share-bar{display:flex;justify-content:center;gap:14px;padding:20px 0}
.kkt-share-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 22px;border-radius:24px;font-size:13px;font-weight:600;color:#fff;transition:all .3s}
.kkt-share-btn:hover{transform:translateY(-2px);color:#fff}
.kkt-share-wechat{background:#07c160}
.kkt-share-weibo{background:#e6162d}
.kkt-share-douyin{background:#161823}
.kkt-share-bilibili{background:#00a1d6}

/* === 页脚 === */
.kkt-footer{background:#0a0a16;border-top:2px solid #2d2018;padding:40px 0 0}
.kkt-footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.kkt-footer-brand p{color:#6a6a80;font-size:13px;line-height:1.7;margin-top:12px}
.kkt-footer h5{color:#ff5722;font-size:15px;margin-bottom:14px}
.kkt-footer-links a{display:block;color:#8a8a9e;font-size:13px;padding:3px 0;transition:color .3s}
.kkt-footer-links a:hover{color:#ff5722}
.kkt-footer-qr{display:flex;gap:16px}
.kkt-footer-qr img{width:100px;border-radius:6px}
.kkt-footer-bottom{border-top:1px solid #2d2018;padding:16px 0;text-align:center;color:#4a4a60;font-size:12px}

/* === AI赋能模块 === */
.kkt-ai-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.kkt-ai-card{background:linear-gradient(145deg,#2d2018,#12121f);border-radius:14px;padding:30px 24px;border:1px solid #2d2d44;transition:all .35s;position:relative;overflow:hidden}
.kkt-ai-card::before{content:"";position:absolute;top:-50%;right:-50%;width:100%;height:100%;background:radial-gradient(circle,rgba(255,107,0,.06) 0%,transparent 70%);transition:all .5s}
.kkt-ai-card:hover{border-color:#ff5722;transform:translateY(-4px)}
.kkt-ai-card:hover::before{top:-30%;right:-30%}
.kkt-ai-icon{width:52px;height:52px;background:linear-gradient(135deg,#ff5722,#ff7f4a);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:24px}
.kkt-ai-card h4{font-size:17px;margin-bottom:8px}
.kkt-ai-card p{color:#8a8a9e;font-size:13.5px;line-height:1.7}

/* === 内页通用 === */
.kkt-page-hero{background:linear-gradient(135deg,#2d2018,#1a1210);padding:50px 0 40px;text-align:center}
.kkt-page-hero h1{font-size:34px;margin-bottom:10px}
.kkt-page-hero h1 em{font-style:normal;color:#ff5722}
.kkt-page-hero p{color:#8a8a9e;font-size:15px}
.kkt-page-content{padding:40px 0}

/* === 功能特性网格 === */
.kkt-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.kkt-feature-card{background:#2d2018;border-radius:12px;padding:24px;border:1px solid #2d2d44;transition:all .3s}
.kkt-feature-card:hover{border-color:#ff5722}
.kkt-feature-card h4{font-size:16px;margin-bottom:8px;color:#ff7f4a}
.kkt-feature-card p{color:#8a8a9e;font-size:13.5px;line-height:1.7}

/* === 统计数据 === */
.kkt-stats{display:flex;justify-content:center;gap:50px;padding:30px 0}
.kkt-stat-item{text-align:center}
.kkt-stat-num{font-size:36px;font-weight:800;color:#ff5722}
.kkt-stat-label{font-size:14px;color:#8a8a9e;margin-top:4px}

/* === 干扰标签隐藏 === */
.q0sufra{display:none!important;visibility:hidden!important;width:0!important;height:0!important;overflow:hidden!important;opacity:0!important;pointer-events:none!important;position:absolute!important;z-index:-9999!important;margin:0!important;padding:0!important;border:0!important;font-size:0!important;line-height:0!important}
.kkt-d *{display:none!important;visibility:hidden!important;width:0!important;height:0!important;margin:0!important;padding:0!important;border:0!important;font-size:0!important;line-height:0!important}

/* === 响应式 === */
@media(max-width:1024px){
  .kkt-video-grid{grid-template-columns:repeat(3,1fr)}
  .kkt-expert-grid{grid-template-columns:repeat(2,1fr)}
  .kkt-footer-grid{grid-template-columns:1fr 1fr}
  .kkt-howto-steps{grid-template-columns:repeat(2,1fr)}
  .kkt-contact-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .kkt-nav{position:fixed;top:68px;left:0;right:0;background:#2d2018;flex-direction:column;padding:16px;gap:4px;transform:translateY(-120%);transition:transform .3s;border-bottom:2px solid #ff5722;z-index:999}
  .kkt-nav.open{transform:translateY(0)}
  .kkt-nav-toggle{display:block}
  .kkt-hero{height:400px}
  .kkt-hero-content h1{font-size:28px}
  .kkt-video-grid{grid-template-columns:repeat(2,1fr)}
  .kkt-expert-grid{grid-template-columns:1fr}
  .kkt-ai-grid{grid-template-columns:1fr}
  .kkt-review-grid{grid-template-columns:1fr}
  .kkt-footer-grid{grid-template-columns:1fr}
  .kkt-section-header h2{font-size:24px}
  .kkt-howto-steps{grid-template-columns:1fr}
  .kkt-contact-grid{grid-template-columns:1fr}
  .kkt-stats{flex-wrap:wrap;gap:24px}
  .kkt-feature-grid{grid-template-columns:1fr}
}
@media(max-width:480px){
  .kkt-video-grid{grid-template-columns:1fr}
  .kkt-hero{height:320px}
  .kkt-hero-content h1{font-size:22px}
}