/* 双飞修车改装视频社区 原创样式表 v1.0 */
:root{
  --c-bg:#141414;
  --c-bg2:#1d1d1f;
  --c-card:#232326;
  --c-line:#333338;
  --c-amber:#f59a1e;
  --c-amber2:#ffb74d;
  --c-text:#e8e6e1;
  --c-sub:#a8a5a0;
  --radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;background:var(--c-bg);color:var(--c-text);line-height:1.75;font-size:16px;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
ul{list-style:none;}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px;}

/* ===== 顶部导航 ===== */
.topbar{position:sticky;top:0;z-index:99;background:rgba(20,20,20,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--c-line);}
.topbar .wrap{display:flex;align-items:center;gap:26px;height:70px;}
.logo{display:flex;align-items:center;gap:10px;}
.logo img{height:46px;width:auto;}
.logo strong{font-size:22px;color:var(--c-amber);letter-spacing:1px;white-space:nowrap;}
.nav{display:flex;gap:4px;flex:1;flex-wrap:wrap;}
.nav a{padding:8px 14px;border-radius:8px;font-size:15px;color:var(--c-sub);transition:.25s;white-space:nowrap;}
.nav a:hover,.nav a.on{color:#141414;background:var(--c-amber);}
.menu-btn{display:none;background:none;border:1px solid var(--c-line);color:var(--c-amber);font-size:22px;border-radius:8px;padding:2px 12px;cursor:pointer;}

/* ===== 搜索条 ===== */
.searchbar{background:var(--c-bg2);border-bottom:1px solid var(--c-line);padding:12px 0;}
.searchbar form{display:flex;gap:10px;max-width:680px;margin:0 auto;padding:0 20px;}
.searchbar input{flex:1;background:#141414;border:1px solid var(--c-line);border-radius:30px;padding:10px 22px;color:var(--c-text);font-size:15px;outline:none;}
.searchbar input:focus{border-color:var(--c-amber);}
.searchbar button{background:var(--c-amber);color:#141414;border:none;border-radius:30px;padding:10px 26px;font-size:15px;font-weight:700;cursor:pointer;}
.search-tip{text-align:center;color:var(--c-amber);font-size:13px;padding-top:8px;display:none;}

/* ===== 面包屑 ===== */
.crumb{padding:16px 0 0;font-size:14px;color:var(--c-sub);}
.crumb a{color:var(--c-amber);}

/* ===== Banner ===== */
.hero{position:relative;min-height:560px;display:flex;align-items:center;background:#101010 url(../images/banner.jpg) center/cover no-repeat;}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,10,10,.88) 0%,rgba(10,10,10,.55) 45%,rgba(10,10,10,.15) 100%);}
.hero .wrap{position:relative;z-index:2;padding-top:60px;padding-bottom:60px;}
.hero h1{font-size:40px;line-height:1.3;color:#fff;margin-bottom:18px;}
.hero h1 em{color:var(--c-amber);font-style:normal;}
.hero p{max-width:640px;color:#d6d3ce;font-size:17px;margin-bottom:14px;}
.hero .btns{margin-top:26px;display:flex;gap:16px;flex-wrap:wrap;}
.btn{display:inline-block;padding:12px 30px;border-radius:30px;font-size:16px;font-weight:600;transition:.25s;}
.btn-main{background:var(--c-amber);color:#141414;}
.btn-main:hover{background:var(--c-amber2);}
.btn-line{border:1px solid var(--c-amber);color:var(--c-amber);}
.btn-line:hover{background:var(--c-amber);color:#141414;}
.hero .tags{margin-top:24px;display:flex;gap:10px;flex-wrap:wrap;}
.hero .tags span{border:1px solid rgba(245,154,30,.5);color:var(--c-amber2);font-size:13px;padding:4px 14px;border-radius:20px;}

/* ===== 通用区块 ===== */
.sec{padding:64px 0;}
.sec-alt{background:var(--c-bg2);}
.sec-head{text-align:center;margin-bottom:40px;}
.sec-head h2{font-size:30px;color:#fff;}
.sec-head h2 em{color:var(--c-amber);font-style:normal;}
.sec-head p{color:var(--c-sub);margin-top:10px;font-size:15px;max-width:760px;margin-left:auto;margin-right:auto;}

/* ===== 栅格 ===== */
.grid{display:grid;gap:24px;}
.g3{grid-template-columns:repeat(3,1fr);}
.g4{grid-template-columns:repeat(4,1fr);}
.g2{grid-template-columns:repeat(2,1fr);}

/* ===== 视频卡片 ===== */
.vcard{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;transition:.3s;}
.vcard:hover{transform:translateY(-6px);border-color:var(--c-amber);box-shadow:0 14px 34px rgba(0,0,0,.5);}
.vthumb{position:relative;aspect-ratio:16/9;overflow:hidden;cursor:pointer;background:#0d0d0d;}
.vthumb img{width:100%;height:100%;object-fit:cover;transition:.4s;}
.vcard:hover .vthumb img{transform:scale(1.06);}
.vplay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.35);opacity:0;transition:.3s;}
.vcard:hover .vplay,.vthumb:hover .vplay{opacity:1;}
.vplay i{width:64px;height:64px;border-radius:50%;background:rgba(245,154,30,.92);position:relative;box-shadow:0 0 0 8px rgba(245,154,30,.25);}
.vplay i::after{content:"";position:absolute;left:24px;top:18px;border-left:20px solid #141414;border-top:13px solid transparent;border-bottom:13px solid transparent;}
.vtime{position:absolute;right:10px;bottom:10px;background:rgba(0,0,0,.75);color:#fff;font-size:12px;padding:2px 8px;border-radius:6px;}
.vbody{padding:16px 18px 18px;}
.vbody h3{font-size:16px;color:#fff;line-height:1.5;margin-bottom:8px;}
.vbody p{font-size:13px;color:var(--c-sub);margin-bottom:12px;}
.vmeta{display:flex;gap:14px;font-size:13px;color:var(--c-sub);flex-wrap:wrap;}
.vmeta b{color:var(--c-amber);font-weight:600;}
.vtag{display:inline-block;background:rgba(245,154,30,.12);color:var(--c-amber);font-size:12px;padding:2px 10px;border-radius:6px;margin-right:6px;margin-top:10px;}

/* ===== 模块卡片 ===== */
.mcard{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:28px 24px;transition:.3s;}
.mcard:hover{border-color:var(--c-amber);transform:translateY(-4px);}
.mcard .ico{width:52px;height:52px;border-radius:12px;background:rgba(245,154,30,.14);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px;}
.mcard h3{font-size:18px;color:#fff;margin-bottom:10px;}
.mcard p{font-size:14px;color:var(--c-sub);}
.mcard ul{margin-top:12px;}
.mcard ul li{font-size:13px;color:var(--c-sub);padding:4px 0 4px 18px;position:relative;}
.mcard ul li::before{content:"";position:absolute;left:0;top:12px;width:8px;height:8px;border-radius:50%;background:var(--c-amber);}

/* ===== 专家卡片 ===== */
.expert{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;transition:.3s;}
.expert:hover{border-color:var(--c-amber);transform:translateY(-5px);}
.expert .avatar{aspect-ratio:1/1;overflow:hidden;}
.expert .avatar img{width:100%;height:100%;object-fit:cover;}
.expert .info{padding:18px;}
.expert h3{font-size:18px;color:#fff;}
.expert .role{color:var(--c-amber);font-size:13px;margin:4px 0 10px;}
.expert p{font-size:13px;color:var(--c-sub);margin-bottom:6px;}
.expert .links{margin-top:14px;display:flex;gap:10px;}
.expert .links a{font-size:13px;padding:6px 14px;border-radius:20px;border:1px solid var(--c-amber);color:var(--c-amber);transition:.25s;}
.expert .links a:hover{background:var(--c-amber);color:#141414;}

/* ===== Logo墙 ===== */
.brandwall{display:grid;grid-template-columns:repeat(6,1fr);gap:18px;}
.brandwall .bx{background:var(--c-card);border:1px solid var(--c-line);border-radius:12px;height:88px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;transition:.3s;}
.brandwall .bx:hover{border-color:var(--c-amber);}
.brandwall .bx b{color:var(--c-amber);font-size:19px;letter-spacing:1px;}
.brandwall .bx span{color:var(--c-sub);font-size:12px;}

/* ===== FAQ ===== */
.faq{max-width:860px;margin:0 auto;}
.faq details{background:var(--c-card);border:1px solid var(--c-line);border-radius:12px;margin-bottom:14px;padding:0 22px;transition:.3s;}
.faq details[open]{border-color:var(--c-amber);}
.faq summary{cursor:pointer;padding:18px 0;font-size:16px;color:#fff;font-weight:600;list-style:none;position:relative;padding-right:30px;}
.faq summary::after{content:"+";position:absolute;right:0;top:14px;font-size:22px;color:var(--c-amber);}
.faq details[open] summary::after{content:"−";}
.faq .ans{padding:0 0 18px;color:var(--c-sub);font-size:14px;}

/* ===== 评论 ===== */
.reviews{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.review{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:24px;}
.review .stars{color:var(--c-amber);letter-spacing:3px;margin-bottom:10px;font-size:15px;}
.review p{font-size:14px;color:var(--c-text);margin-bottom:14px;}
.review .who{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--c-sub);}
.review .who i{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--c-amber),#8c5a10);display:flex;align-items:center;justify-content:center;color:#141414;font-weight:700;font-style:normal;font-size:15px;}

/* ===== How-To步骤 ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.step{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:26px 22px;position:relative;}
.step .num{position:absolute;top:-16px;left:22px;width:36px;height:36px;border-radius:50%;background:var(--c-amber);color:#141414;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:17px;}
.step h3{font-size:16px;color:#fff;margin:10px 0 8px;}
.step p{font-size:13px;color:var(--c-sub);}

/* ===== 联系我们 ===== */
.contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:30px;align-items:start;}
.contact-card{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:28px;}
.contact-card h3{color:#fff;font-size:19px;margin-bottom:16px;}
.contact-card li{padding:8px 0;border-bottom:1px dashed var(--c-line);font-size:14px;color:var(--c-sub);display:flex;gap:8px;}
.contact-card li b{color:var(--c-amber);min-width:88px;font-weight:600;}
.contact-card img.shopimg{border-radius:10px;margin-bottom:18px;}
.qr-row{display:flex;gap:24px;margin-top:18px;flex-wrap:wrap;}
.qr-item{text-align:center;}
.qr-item img{width:130px;height:130px;border-radius:10px;background:#fff;padding:6px;margin:0 auto;}
.qr-item span{display:block;margin-top:8px;font-size:13px;color:var(--c-sub);}

/* ===== 分享 ===== */
.share-bar{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.share-bar a{display:flex;align-items:center;gap:8px;background:var(--c-card);border:1px solid var(--c-line);padding:10px 22px;border-radius:30px;font-size:14px;color:var(--c-sub);transition:.25s;cursor:pointer;}
.share-bar a:hover{border-color:var(--c-amber);color:var(--c-amber);}
.share-bar a i{width:10px;height:10px;border-radius:50%;background:var(--c-amber);font-style:normal;}

/* ===== 文章列表/正文 ===== */
.article{background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--radius);padding:34px;max-width:900px;margin:0 auto;}
.article h2{color:#fff;font-size:22px;margin:22px 0 12px;}
.article h3{color:var(--c-amber);font-size:18px;margin:18px 0 10px;}
.article p{color:var(--c-sub);font-size:15px;margin-bottom:12px;}
.article img{border-radius:10px;margin:14px 0;}

/* ===== 页脚 ===== */
.footer{background:#0e0e0f;border-top:1px solid var(--c-line);padding:56px 0 30px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px;margin-bottom:36px;}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px;}
.footer .flogo{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer .flogo img{height:44px;}
.footer .flogo strong{color:var(--c-amber);font-size:19px;}
.footer p,.footer li{font-size:13px;color:var(--c-sub);padding:3px 0;}
.footer a:hover{color:var(--c-amber);}
.footer .qr-row{margin-top:0;}
.footer .qr-item img{width:104px;height:104px;}
.copy{border-top:1px solid var(--c-line);padding-top:22px;text-align:center;font-size:13px;color:#77746f;}
.copy b{color:var(--c-amber);}

/* ===== 移动端 ===== */
@media(max-width:960px){
  .g3,.g4{grid-template-columns:repeat(2,1fr);}
  .brandwall{grid-template-columns:repeat(3,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .contact-grid,.reviews{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .hero h1{font-size:30px;}
}
@media(max-width:640px){
  .menu-btn{display:block;margin-left:auto;}
  .nav{display:none;position:absolute;top:70px;left:0;right:0;background:#1a1a1c;flex-direction:column;padding:12px 20px;border-bottom:1px solid var(--c-line);}
  .nav.open{display:flex;}
  .g3,.g4,.g2{grid-template-columns:1fr;}
  .brandwall{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:1fr;}
  .hero{min-height:480px;}
  .hero h1{font-size:25px;}
  .sec{padding:44px 0;}
  .footer-grid{grid-template-columns:1fr;}
}