/* ============================================================
   母狗 修车改装视频社区 - 原创样式表
   域名: oszmabf.cn
   配色: 科技蓝 #1A73E8 + 活力橙 #FF6D00
   ============================================================ */

/* --- Reset & Base --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#1F2937;background:#F8FAFC;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:#1A73E8;text-decoration:none;transition:color .2s}
a:hover{color:#FF6D00}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* --- Layout --- */
.wrap{max-width:1240px;margin:0 auto;padding:0 20px}
.flex-row{display:flex;flex-wrap:wrap;gap:20px}

/* --- Header --- */
.top-bar{background:#0D1117;position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.35)}
.top-bar .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand-link{display:flex;align-items:center;gap:10px}
.brand-link img{width:46px;height:46px;border-radius:8px}
.brand-link span{font-size:1.35rem;font-weight:700;color:#fff;letter-spacing:1px}
.nav-list{display:flex;gap:6px}
.nav-list a{color:#cbd5e1;font-size:.92rem;padding:8px 14px;border-radius:6px;transition:all .2s}
.nav-list a:hover,.nav-list a.cur{background:#1A73E8;color:#fff}
.burger{display:none;background:none;border:none;color:#fff;font-size:1.6rem;cursor:pointer}

/* --- Search Bar --- */
.search-wrap{background:#111827;padding:14px 0}
.search-box{display:flex;max-width:640px;margin:0 auto}
.search-box input{flex:1;padding:10px 18px;border:2px solid #1A73E8;border-right:none;border-radius:8px 0 0 8px;font-size:.95rem;outline:none;background:#1e293b;color:#f1f5f9}
.search-box input::placeholder{color:#64748b}
.search-box button{padding:10px 28px;background:#1A73E8;color:#fff;border:2px solid #1A73E8;border-radius:0 8px 8px 0;cursor:pointer;font-size:.95rem;transition:background .2s}
.search-box button:hover{background:#1557b0}

/* --- Hero Banner --- */
.hero{position:relative;min-height:480px;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden;background:#0D1117}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.45);z-index:0}
.hero-body{position:relative;z-index:2;padding:60px 20px;max-width:820px}
.hero h1{font-size:2.6rem;color:#fff;font-weight:800;margin-bottom:16px;text-shadow:0 2px 8px rgba(0,0,0,.5)}
.hero h1 em{font-style:normal;color:#FF6D00}
.hero .sub{font-size:1.15rem;color:#cbd5e1;margin-bottom:28px;line-height:1.8}
.hero .tag-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.hero .tag-row span{background:rgba(26,115,232,.25);color:#93c5fd;padding:5px 16px;border-radius:20px;font-size:.85rem;border:1px solid rgba(26,115,232,.4)}
.hero .cta{display:inline-block;margin-top:26px;padding:14px 42px;background:#FF6D00;color:#fff;border-radius:8px;font-size:1.05rem;font-weight:600;transition:transform .2s,box-shadow .2s}
.hero .cta:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(255,109,0,.4);color:#fff}

/* --- Section --- */
.sec{padding:56px 0}
.sec-dark{background:#0D1117;color:#f1f5f9}
.sec-gray{background:#f1f5f9}
.unqip{text-align:center;margin-bottom:40px}
.unqip h2{font-size:1.85rem;font-weight:700;margin-bottom:10px}
.unqip h2 em{font-style:normal;color:#FF6D00}
.unqip p{color:#6B7280;font-size:1rem;max-width:640px;margin:0 auto}
.sec-dark .unqip p{color:#94a3b8}

/* --- Video Card Grid --- */
.lyduq{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}
.vid-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.07);transition:transform .25s,box-shadow .25s}
.vid-card:hover{transform:translateY(-4px);box-shadow:0 8px 28px rgba(0,0,0,.12)}
.vid-thumb{position:relative;padding-top:56.25%;background:#1e293b;overflow:hidden}
.vid-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .4s}
.vid-card:hover .vid-thumb img{transform:scale(1.06)}
.eydq8p{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(0,0,0,.3)}
.vid-card:hover .eydq8p{opacity:1}
.eydq8p i{width:56px;height:56px;background:rgba(255,109,0,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.4rem}
.eydq8p i::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:4px}
.rscj8qc{position:absolute;top:10px;left:10px;background:#FF6D00;color:#fff;font-size:.72rem;padding:3px 10px;border-radius:4px;font-weight:600}
.b8h869ow{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;font-size:.75rem;padding:2px 8px;border-radius:4px}
.sv6rxh{padding:14px 16px}
.sv6rxh h3{font-size:.98rem;font-weight:600;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.9g7la9{display:flex;gap:14px;color:#6B7280;font-size:.8rem}
.b3geuaj{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.b3geuaj span{background:#EEF2FF;color:#4338CA;font-size:.72rem;padding:2px 10px;border-radius:12px}
.sec-dark .vid-card{background:#1e293b}
.sec-dark .sv6rxh h3{color:#f1f5f9}
.sec-dark .9g7la9{color:#94a3b8}
.sec-dark .b3geuaj span{background:#312e81;color:#a5b4fc}

/* --- Stats Row --- */
.ytobko{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:20px;padding:36px 0}
.lkyj1{text-align:center;padding:24px 12px;background:rgba(26,115,232,.08);border-radius:12px;border:1px solid rgba(26,115,232,.15)}
.lkyj1 strong{display:block;font-size:2rem;color:#1A73E8;font-weight:800}
.lkyj1 span{font-size:.88rem;color:#6B7280;margin-top:4px;display:block}
.sec-dark .lkyj1{background:rgba(255,109,0,.08);border-color:rgba(255,109,0,.2)}
.sec-dark .lkyj1 strong{color:#FF6D00}
.sec-dark .lkyj1 span{color:#94a3b8}

/* --- Expert / Team Card --- */
.2dkvtfre{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.l62igq{background:#fff;border-radius:12px;overflow:hidden;text-align:center;padding:28px 20px;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:transform .25s}
.l62igq:hover{transform:translateY(-3px)}
.l62igq img{width:110px;height:110px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid #1A73E8}
.l62igq h4{font-size:1.05rem;font-weight:600;margin-bottom:4px}
.l62igq .role{color:#FF6D00;font-size:.85rem;margin-bottom:10px}
.l62igq p{color:#6B7280;font-size:.88rem;line-height:1.6}
.l62igq .links{margin-top:14px;display:flex;gap:10px;justify-content:center}
.l62igq .links a{padding:6px 18px;border-radius:6px;font-size:.82rem;border:1px solid #1A73E8;color:#1A73E8;transition:all .2s}
.l62igq .links a:hover{background:#1A73E8;color:#fff}

/* --- FAQ --- */
.zb8v6p{max-width:800px;margin:0 auto}
.faq-item{border:1px solid #e2e8f0;border-radius:10px;margin-bottom:12px;overflow:hidden;background:#fff}
.faq-q{padding:16px 20px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .2s}
.faq-q:hover{background:#f8fafc}
.faq-q::after{content:"+";font-size:1.3rem;color:#1A73E8;transition:transform .3s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.gcyf4{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 20px}
.faq-item.open .gcyf4{max-height:300px;padding:0 20px 16px}
.gcyf4 p{color:#6B7280;font-size:.92rem;line-height:1.7}

/* --- Review --- */
.5nen24d{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}
.zyb0s{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 10px rgba(0,0,0,.06)}
.zyb0s .stars{color:#FBBF24;font-size:1.1rem;margin-bottom:10px}
.zyb0s blockquote{color:#374151;font-size:.92rem;line-height:1.7;margin-bottom:14px;font-style:italic}
.zyb0s .author{display:flex;align-items:center;gap:10px}
.zyb0s .author strong{font-size:.9rem}
.zyb0s .author span{color:#6B7280;font-size:.8rem}

/* --- Brand Wall --- */
.7laxtf{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center;padding:20px 0}
.7laxtf .kysk0{width:120px;height:60px;background:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;box-shadow:0 1px 6px rgba(0,0,0,.06);font-weight:700;color:#64748b;font-size:.85rem;border:1px solid #e2e8f0}

/* --- Footer --- */
.infjdu{background:#0D1117;color:#94a3b8;padding:48px 0 0}
.e3lml{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:32px;padding-bottom:36px;border-bottom:1px solid #1e293b}
.eev3b6 h5{color:#f1f5f9;font-size:1rem;margin-bottom:14px;font-weight:600}
.eev3b6 p,.eev3b6 a{color:#94a3b8;font-size:.88rem;line-height:1.9}
.eev3b6 a:hover{color:#FF6D00}
.eev3b6 .58z8q8i{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.eev3b6 .58z8q8i img{width:40px;height:40px;border-radius:6px}
.eev3b6 .58z8q8i span{font-size:1.2rem;font-weight:700;color:#fff}
.z6mqs{display:flex;gap:16px;margin-top:12px}
.u8unh5v0{width:100px;height:100px;background:#1e293b;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.7rem;color:#64748b;text-align:center;border:1px solid #334155}
.ngyxa14a{text-align:center;padding:20px 0;font-size:.82rem;color:#64748b}
.c21rwb{display:flex;gap:10px;justify-content:center;margin:16px 0}
.c21rwb a{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:#1e293b;color:#94a3b8;font-size:.85rem;transition:all .2s;border:1px solid #334155}
.c21rwb a:hover{background:#1A73E8;color:#fff;border-color:#1A73E8}

/* --- Breadcrumb --- */
.yxwpzx{padding:12px 0;font-size:.85rem;color:#6B7280}
.yxwpzx a{color:#1A73E8}
.yxwpzx span{margin:0 6px;color:#cbd5e1}

/* --- Inner Page --- */
.page-hero{background:#0D1117;padding:48px 0;text-align:center}
.page-hero h1{color:#fff;font-size:2rem;font-weight:700}
.page-hero p{color:#94a3b8;margin-top:8px}
.page-body{padding:48px 0}

/* --- How-To Guide --- */
.steps{counter-reset:step}
.step-item{display:flex;gap:20px;margin-bottom:28px;align-items:flex-start}
.step-item::before{counter-increment:step;content:counter(step);flex-shrink:0;width:44px;height:44px;background:#1A73E8;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem}
.step-item div h4{font-size:1.05rem;font-weight:600;margin-bottom:4px}
.step-item div p{color:#6B7280;font-size:.92rem}

/* --- Responsive --- */
@media(max-width:768px){
  .top-bar .wrap{flex-wrap:wrap}
  .nav-list{display:none;width:100%;flex-direction:column;padding:10px 0}
  .nav-list.show{display:flex}
  .burger{display:block}
  .hero h1{font-size:1.8rem}
  .hero .sub{font-size:.98rem}
  .lyduq{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .ytobko{grid-template-columns:repeat(2,1fr)}
  .e3lml{grid-template-columns:1fr}
  .search-box{margin:0 16px}
}
@media(max-width:480px){
  .hero{min-height:360px}
  .hero h1{font-size:1.5rem}
  .lyduq{grid-template-columns:1fr}
  .ytobko{grid-template-columns:1fr 1fr}
  .2dkvtfre{grid-template-columns:1fr}
}