/* ============================================
   91 修车改装视频社区 - 原创样式表
   配色：碳纤维黑 #0A0A0F + 赛车红 #E8192C + 钛金灰 #2A2D35
   ============================================ */

/* === 基础重置 === */
*,*::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;background:#0A0A0F;color:#E0E0E8;line-height:1.75;overflow-x:hidden}
a{color:#E8192C;text-decoration:none;transition:color .3s}
a:hover{color:#FF4D5E}
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 === */
.wrap-x7k{max-width:1240px;margin:0 auto;padding:0 20px}

/* === 顶部导航 === */
.nav-t9m{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(10,10,15,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(232,25,44,.15);transition:all .3s}
.nav-t9m .wrap-x7k{display:flex;align-items:center;justify-content:space-between;height:68px}
.nav-t9m .logo-q3f{display:flex;align-items:center;gap:10px}
.nav-t9m .logo-q3f img{height:42px;width:auto}
.nav-t9m .logo-q3f span{font-size:1.4rem;font-weight:800;color:#fff;letter-spacing:1px}
.menu-r5d{display:flex;gap:28px;align-items:center}
.menu-r5d a{color:#C8C8D0;font-size:.95rem;font-weight:500;position:relative;padding:4px 0}
.menu-r5d a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:#E8192C;transition:width .3s}
.menu-r5d a:hover{color:#fff}
.menu-r5d a:hover::after{width:100%}
.burger-h4n{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.burger-h4n span{width:24px;height:2px;background:#fff;transition:all .3s}

/* === 搜索框 === */
.search-w2p{background:#12121A;padding:14px 0;border-bottom:1px solid #1E1E2A}
.search-w2p form{display:flex;max-width:600px;margin:0 auto}
.search-w2p input{flex:1;background:#1A1A26;border:1px solid #2A2D35;border-right:none;border-radius:6px 0 0 6px;padding:10px 16px;color:#fff;font-size:.95rem;outline:none}
.search-w2p input:focus{border-color:#E8192C}
.search-w2p button{background:#E8192C;color:#fff;border:none;padding:10px 24px;border-radius:0 6px 6px 0;cursor:pointer;font-size:.95rem;font-weight:600;transition:background .3s}
.search-w2p button:hover{background:#FF4D5E}

/* === Hero Banner === */
.hero-b6j{position:relative;margin-top:68px;height:520px;overflow:hidden;display:flex;align-items:center}
.hero-b6j .hero-img-z1{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:brightness(.45)}
.hero-b6j .hero-txt-a8{position:relative;z-index:2;max-width:680px;padding:0 40px}
.hero-b6j h1{font-size:2.6rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.6)}
.hero-b6j h1 em{font-style:normal;color:#E8192C}
.hero-b6j p{font-size:1.1rem;color:#C8C8D0;margin-bottom:24px;line-height:1.8}
.hero-b6j .cta-g4{display:inline-block;background:#E8192C;color:#fff;padding:12px 32px;border-radius:6px;font-weight:600;font-size:1rem;transition:all .3s;box-shadow:0 4px 20px rgba(232,25,44,.35)}
.hero-b6j .cta-g4:hover{background:#FF4D5E;transform:translateY(-2px);box-shadow:0 6px 28px rgba(232,25,44,.5)}

/* === 通用板块 === */
.sec-p4v{padding:60px 0}
.sec-p4v .sec-hd-n1{text-align:center;margin-bottom:40px}
.sec-p4v .sec-hd-n1 h2{font-size:1.9rem;margin-bottom:10px;position:relative;display:inline-block}
.sec-p4v .sec-hd-n1 h2::after{content:'';display:block;width:60px;height:3px;background:#E8192C;margin:10px auto 0}
.sec-p4v .sec-hd-n1 p{color:#8A8A96;font-size:1rem;margin-top:8px}
.sec-alt-d2{background:#0E0E16}

/* === 视频卡片网格 === */
.vgrid-c8{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.vcard-m5{background:#14141E;border-radius:10px;overflow:hidden;transition:all .35s;border:1px solid transparent}
.vcard-m5:hover{transform:translateY(-6px);border-color:rgba(232,25,44,.3);box-shadow:0 12px 36px rgba(0,0,0,.5)}
.vcard-m5 .thumb-e7{position:relative;aspect-ratio:16/9;overflow:hidden;cursor:pointer}
.vcard-m5 .thumb-e7 img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.vcard-m5:hover .thumb-e7 img{transform:scale(1.08)}
.vcard-m5 .play-k9{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.45);opacity:0;transition:opacity .35s}
.vcard-m5:hover .play-k9{opacity:1}
.vcard-m5 .play-k9 i{width:56px;height:56px;background:rgba(232,25,44,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:transform .3s}
.vcard-m5 .play-k9 i::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.vcard-m5:hover .play-k9 i{transform:scale(1.15)}
.vcard-m5 .dur-f3{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;font-size:.75rem;padding:2px 8px;border-radius:3px}
.vcard-m5 .vinfo-u6{padding:14px 16px}
.vcard-m5 .vinfo-u6 h3{font-size:.95rem;color:#E8E8F0;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.vcard-m5 .vmeta-j2{display:flex;gap:14px;font-size:.8rem;color:#6A6A78}
.vcard-m5 .vmeta-j2 span{display:flex;align-items:center;gap:4px}

/* === 修车传媒 6列 === */
.media-grid-s3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.media-item-w1{background:#14141E;border-radius:10px;padding:28px 24px;text-align:center;border:1px solid #1E1E2A;transition:all .35s}
.media-item-w1:hover{border-color:#E8192C;transform:translateY(-4px);box-shadow:0 8px 30px rgba(232,25,44,.15)}
.media-item-w1 .icon-y5{font-size:2.4rem;margin-bottom:14px;display:block}
.media-item-w1 h4{font-size:1.05rem;margin-bottom:8px;color:#fff}
.media-item-w1 p{font-size:.88rem;color:#8A8A96;line-height:1.6}

/* === 专家卡片 === */
.expert-grid-v4{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.expert-card-b2{background:#14141E;border-radius:12px;overflow:hidden;text-align:center;padding:30px 20px;border:1px solid #1E1E2A;transition:all .35s}
.expert-card-b2:hover{border-color:#E8192C;box-shadow:0 8px 30px rgba(232,25,44,.12)}
.expert-card-b2 img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid #E8192C}
.expert-card-b2 h4{font-size:1.05rem;margin-bottom:4px}
.expert-card-b2 .role-z8{color:#E8192C;font-size:.85rem;margin-bottom:10px;display:block}
.expert-card-b2 p{font-size:.88rem;color:#8A8A96;line-height:1.6;margin-bottom:14px}
.expert-card-b2 .exp-links-q7{display:flex;gap:10px;justify-content:center}
.expert-card-b2 .exp-links-q7 a{background:#E8192C;color:#fff;padding:6px 16px;border-radius:5px;font-size:.82rem;transition:background .3s}
.expert-card-b2 .exp-links-q7 a:hover{background:#FF4D5E}

/* === AI赋能 === */
.ai-wrap-l6{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.ai-wrap-l6 img{border-radius:12px;box-shadow:0 8px 40px rgba(0,0,0,.4)}
.ai-list-o9{display:flex;flex-direction:column;gap:18px}
.ai-list-o9 .ai-item-p3{display:flex;gap:14px;align-items:flex-start}
.ai-list-o9 .ai-dot-r1{width:10px;height:10px;background:#E8192C;border-radius:50%;margin-top:8px;flex-shrink:0}
.ai-list-o9 h4{font-size:1rem;margin-bottom:4px}
.ai-list-o9 p{font-size:.88rem;color:#8A8A96}

/* === 社区功能 === */
.comm-grid-t8{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.comm-card-a1{background:linear-gradient(145deg,#14141E,#1A1A28);border-radius:10px;padding:24px;border:1px solid #1E1E2A;transition:all .35s}
.comm-card-a1:hover{border-color:#E8192C;transform:translateY(-4px)}
.comm-card-a1 .comm-icon-d5{font-size:2rem;margin-bottom:12px;display:block}
.comm-card-a1 h4{font-size:1rem;margin-bottom:8px;color:#fff}
.comm-card-a1 p{font-size:.85rem;color:#8A8A96;line-height:1.6}

/* === 合作品牌墙 === */
.brand-wall-g7{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;padding:20px 0}
.brand-wall-g7 .bw-item-h3{background:#14141E;border:1px solid #1E1E2A;border-radius:8px;padding:18px 30px;font-size:1rem;font-weight:600;color:#8A8A96;transition:all .3s}
.brand-wall-g7 .bw-item-h3:hover{border-color:#E8192C;color:#E8192C}

/* === How-To 指南 === */
.howto-steps-n4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.howto-step-e6{background:#14141E;border-radius:10px;padding:28px 20px;text-align:center;border:1px solid #1E1E2A;position:relative;counter-increment:step}
.howto-step-e6::before{content:counter(step);position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:32px;height:32px;background:#E8192C;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem}
.howto-step-e6 h4{margin-top:10px;font-size:1rem;margin-bottom:8px}
.howto-step-e6 p{font-size:.85rem;color:#8A8A96}

/* === FAQ === */
.faq-list-c5{max-width:800px;margin:0 auto}
.faq-item-i8{border:1px solid #1E1E2A;border-radius:8px;margin-bottom:12px;overflow:hidden}
.faq-item-i8 .faq-q-w3{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;cursor:pointer;background:#14141E;transition:background .3s}
.faq-item-i8 .faq-q-w3:hover{background:#1A1A26}
.faq-item-i8 .faq-q-w3 h4{font-size:.95rem;font-weight:600;color:#E8E8F0}
.faq-item-i8 .faq-q-w3 .arrow-v2{color:#E8192C;font-size:1.2rem;transition:transform .3s}
.faq-item-i8.active .faq-q-w3 .arrow-v2{transform:rotate(180deg)}
.faq-item-i8 .faq-a-x4{padding:0 20px;max-height:0;overflow:hidden;transition:all .4s;color:#8A8A96;font-size:.9rem;line-height:1.7}
.faq-item-i8.active .faq-a-x4{padding:14px 20px;max-height:300px}

/* === 用户评论 === */
.review-grid-f9{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.review-card-k4{background:#14141E;border-radius:10px;padding:24px;border:1px solid #1E1E2A}
.review-card-k4 .stars-m7{color:#FFB800;font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.review-card-k4 p{font-size:.9rem;color:#C8C8D0;line-height:1.7;margin-bottom:12px;font-style:italic}
.review-card-k4 .reviewer-n3{display:flex;align-items:center;gap:10px}
.review-card-k4 .reviewer-n3 .avatar-s5{width:36px;height:36px;border-radius:50%;background:#E8192C;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.85rem}
.review-card-k4 .reviewer-n3 span{font-size:.85rem;color:#6A6A78}

/* === 联系我们 === */
.contact-grid-u7{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info-y3 h3{font-size:1.2rem;margin-bottom:16px;color:#fff}
.contact-info-y3 .ci-row-d4{display:flex;gap:12px;margin-bottom:14px;align-items:flex-start}
.contact-info-y3 .ci-row-d4 .ci-label-e9{color:#E8192C;font-weight:600;min-width:80px;font-size:.9rem}
.contact-info-y3 .ci-row-d4 .ci-val-f1{color:#C8C8D0;font-size:.9rem}
.contact-qr-z6{display:flex;gap:30px;justify-content:center;align-items:flex-start}
.contact-qr-z6 .qr-box-a2{text-align:center}
.contact-qr-z6 .qr-box-a2 img{width:140px;height:140px;border-radius:8px;margin-bottom:8px}
.contact-qr-z6 .qr-box-a2 span{font-size:.82rem;color:#6A6A78}

/* === 分享按钮 === */
.share-bar-j1{display:flex;gap:12px;justify-content:center;padding:20px 0}
.share-bar-j1 a{display:flex;align-items:center;gap:6px;background:#1A1A26;border:1px solid #2A2D35;padding:8px 18px;border-radius:6px;color:#C8C8D0;font-size:.85rem;transition:all .3s}
.share-bar-j1 a:hover{border-color:#E8192C;color:#E8192C}

/* === 页脚 === */
.footer-p8{background:#08080D;border-top:1px solid #1A1A26;padding:40px 0 20px}
.footer-top-r2{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-top-r2 h5{font-size:.95rem;color:#fff;margin-bottom:14px;position:relative;padding-bottom:8px}
.footer-top-r2 h5::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:#E8192C}
.footer-top-r2 p{font-size:.85rem;color:#6A6A78;line-height:1.7}
.footer-top-r2 a{display:block;color:#8A8A96;font-size:.85rem;margin-bottom:8px;transition:color .3s}
.footer-top-r2 a:hover{color:#E8192C}
.footer-bot-s4{border-top:1px solid #1A1A26;padding-top:20px;text-align:center;font-size:.82rem;color:#4A4A56}
.footer-bot-s4 a{color:#6A6A78}

/* === 面包屑 === */
.bread-w9{padding:14px 0;font-size:.85rem;color:#6A6A78}
.bread-w9 a{color:#8A8A96}
.bread-w9 a:hover{color:#E8192C}
.bread-w9 span{margin:0 6px;color:#4A4A56}

/* === 内页Hero === */
.page-hero-l3{margin-top:68px;padding:50px 0;background:linear-gradient(135deg,#0E0E16,#1A1A28);text-align:center;border-bottom:1px solid #1E1E2A}
.page-hero-l3 h1{font-size:2rem;margin-bottom:10px}
.page-hero-l3 p{color:#8A8A96;font-size:1rem}

/* === 内容块 === */
.content-block-g8{background:#14141E;border-radius:10px;padding:30px;margin-bottom:24px;border:1px solid #1E1E2A}
.content-block-g8 h3{font-size:1.15rem;margin-bottom:12px;color:#fff}
.content-block-g8 p{font-size:.92rem;color:#C8C8D0;line-height:1.8}

/* === 响应式 === */
@media(max-width:1024px){
  .vgrid-c8{grid-template-columns:repeat(3,1fr)}
  .expert-grid-v4{grid-template-columns:repeat(2,1fr)}
  .howto-steps-n4{grid-template-columns:repeat(2,1fr)}
  .footer-top-r2{grid-template-columns:1fr 1fr}
  .ai-wrap-l6{grid-template-columns:1fr}
}
@media(max-width:768px){
  .vgrid-c8{grid-template-columns:repeat(2,1fr)}
  .media-grid-s3{grid-template-columns:repeat(2,1fr)}
  .comm-grid-t8{grid-template-columns:repeat(2,1fr)}
  .review-grid-f9{grid-template-columns:1fr}
  .contact-grid-u7{grid-template-columns:1fr}
  .hero-b6j{height:400px}
  .hero-b6j h1{font-size:1.8rem}
  .menu-r5d{display:none;position:fixed;top:68px;left:0;width:100%;background:#0A0A0F;flex-direction:column;padding:20px;gap:16px;border-top:1px solid #1E1E2A}
  .menu-r5d.active{display:flex}
  .burger-h4n{display:flex}
  .contact-qr-z6{flex-direction:column;align-items:center}
}
@media(max-width:480px){
  .vgrid-c8{grid-template-columns:1fr}
  .media-grid-s3{grid-template-columns:1fr}
  .comm-grid-t8{grid-template-columns:1fr}
  .howto-steps-n4{grid-template-columns:1fr}
  .expert-grid-v4{grid-template-columns:1fr}
  .hero-b6j{height:320px}
  .hero-b6j h1{font-size:1.5rem}
  .footer-top-r2{grid-template-columns:1fr}
  .share-bar-j1{flex-wrap:wrap}
}