/* ============================================
   日本三级 原创样式表
   品牌色系：珊瑚红 #E8375A + 暖橙 #FF8C42 + 深墨 #1A1A2E
   ============================================ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;color:#2d2d3a;background:#fafafa;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:color .25s}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(26,26,46,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.06);transition:background .3s}
.header-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;height:64px;gap:20px}
.logo-link{flex-shrink:0}
.logo-img{height:38px;width:auto}
.main-nav{display:flex;gap:6px;margin-left:20px}
.nav-item{padding:8px 16px;border-radius:8px;font-size:15px;color:rgba(255,255,255,.78);transition:all .25s;font-weight:500}
.nav-item:hover,.nav-item.active{color:#fff;background:rgba(232,55,90,.35)}
.header-search{margin-left:auto;display:flex;align-items:center;background:rgba(255,255,255,.1);border-radius:24px;overflow:hidden;border:1px solid rgba(255,255,255,.12)}
.header-search input{background:transparent;border:none;outline:none;color:#fff;padding:7px 16px;font-size:14px;width:180px}
.header-search input::placeholder{color:rgba(255,255,255,.45)}
.header-search button{background:#E8375A;color:#fff;border:none;padding:7px 18px;font-size:14px;cursor:pointer;transition:background .25s}
.header-search button:hover{background:#d02e4f}
.mobile-menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.mobile-menu-btn span{display:block;width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s}
.hero-section{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;margin-top:64px}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;filter:brightness(.35)}
.hero-content{position:relative;z-index:2;max-width:1200px;margin:0 auto;padding:80px 24px 60px;color:#fff}
.hero-content h1{font-size:42px;font-weight:800;line-height:1.3;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.4)}
.hero-sub{font-size:18px;color:rgba(255,255,255,.85);max-width:640px;margin-bottom:32px;line-height:1.8}
.hero-btns{display:flex;gap:16px;margin-bottom:40px;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:13px 36px;background:linear-gradient(135deg,#E8375A,#FF8C42);color:#fff;border-radius:30px;font-size:16px;font-weight:600;transition:transform .25s,box-shadow .25s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(232,55,90,.4)}
.btn-outline{display:inline-block;padding:13px 36px;border:2px solid rgba(255,255,255,.6);color:#fff;border-radius:30px;font-size:16px;font-weight:600;transition:all .25s}
.btn-outline:hover{background:rgba(255,255,255,.15);border-color:#fff}
.hero-stats{display:flex;gap:48px}
.stat-item{text-align:center}
.stat-item strong{display:block;font-size:28px;font-weight:800;background:linear-gradient(135deg,#FF8C42,#E8375A);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.stat-item span{font-size:14px;color:rgba(255,255,255,.65)}
.section-block{padding:72px 0}
.section-dark{background:#1A1A2E;color:#fff}
.section-dark .section-head p{color:rgba(255,255,255,.6)}
.section-head{text-align:center;margin-bottom:48px}
.section-head h2{font-size:30px;font-weight:700;margin-bottom:12px;position:relative;display:inline-block}
.section-head h2::after{content:'';position:absolute;bottom:-8px;left:50%;transform:translateX(-50%);width:48px;height:3px;background:linear-gradient(90deg,#E8375A,#FF8C42);border-radius:2px}
.section-head p{font-size:15px;color:#777;margin-top:16px;max-width:600px;margin-left:auto;margin-right:auto}
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.video-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:transform .3s,box-shadow .3s;cursor:pointer}
.section-dark .video-card{background:#252542}
.video-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(0,0,0,.12)}
.card-thumb{position:relative;overflow:hidden;aspect-ratio:4/3}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.video-card:hover .card-thumb img{transform:scale(1.06)}
.play-icon{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:52px;height:52px;background:rgba(232,55,90,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.play-icon::after{content:'';border-left:18px solid #fff;border-top:11px solid transparent;border-bottom:11px solid transparent;margin-left:4px}
.video-card:hover .play-icon{opacity:1}
.duration{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.72);color:#fff;padding:2px 8px;border-radius:4px;font-size:12px;font-weight:600}
.tag{position:absolute;top:8px;left:8px;background:linear-gradient(135deg,#E8375A,#FF8C42);color:#fff;padding:3px 10px;border-radius:4px;font-size:12px;font-weight:600}
.card-info{padding:14px 16px}
.card-info h3{font-size:15px;font-weight:600;line-height:1.5;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.section-dark .card-info h3{color:#eee}
.card-meta{display:flex;gap:12px;font-size:12px;color:#999;flex-wrap:wrap}
.section-dark .card-meta{color:rgba(255,255,255,.5)}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:32px 24px;text-align:center;transition:all .3s}
.service-card:hover{background:rgba(232,55,90,.12);border-color:rgba(232,55,90,.3);transform:translateY(-4px)}
.service-icon{font-size:42px;margin-bottom:16px}
.service-card h3{font-size:18px;font-weight:600;margin-bottom:10px}
.service-card p{font-size:14px;color:rgba(255,255,255,.6);line-height:1.7}
.expert-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
.expert-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:32px;display:flex;flex-direction:column;align-items:center;text-align:center;transition:all .3s}
.expert-card:hover{background:rgba(255,255,255,.08);transform:translateY(-4px)}
.expert-card img{width:120px;height:120px;border-radius:50%;object-fit:cover;border:3px solid rgba(232,55,90,.5);margin-bottom:16px}
.expert-card h4{font-size:20px;font-weight:700;margin-bottom:4px}
.expert-title{color:#FF8C42;font-size:14px;font-weight:600;margin-bottom:10px}
.expert-desc{font-size:14px;color:rgba(255,255,255,.6);line-height:1.7;margin-bottom:14px}
.expert-tags{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:16px}
.expert-tags span{background:rgba(232,55,90,.2);color:#FF8C42;padding:3px 12px;border-radius:20px;font-size:12px}
.expert-actions{display:flex;gap:10px}
.btn-sm{padding:7px 20px;background:linear-gradient(135deg,#E8375A,#FF8C42);color:#fff;border-radius:20px;font-size:13px;font-weight:600;transition:all .25s}
.btn-sm:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(232,55,90,.3)}
.btn-outline-sm{background:transparent;border:1px solid rgba(255,255,255,.3);color:#fff}
.btn-outline-sm:hover{background:rgba(255,255,255,.1)}
.community-wrap{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.community-text h3{font-size:24px;font-weight:700;margin-bottom:16px}
.community-text>p{font-size:15px;color:#666;line-height:1.8;margin-bottom:24px}
.community-features{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.cf-item{background:#fff;border:1px solid #eee;border-radius:10px;padding:16px;transition:all .25s}
.cf-item:hover{border-color:#E8375A;box-shadow:0 4px 16px rgba(232,55,90,.1)}
.cf-item h5{font-size:15px;font-weight:600;margin-bottom:6px}
.cf-item p{font-size:13px;color:#888;line-height:1.6}
.community-img{border-radius:14px;overflow:hidden;box-shadow:0 8px 32px rgba(0,0,0,.1)}
.community-img img{width:100%;height:100%;object-fit:cover}
.partner-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.partner-item{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:20px;text-align:center;font-size:16px;font-weight:600;color:rgba(255,255,255,.7);transition:all .25s}
.partner-item:hover{background:rgba(232,55,90,.15);border-color:rgba(232,55,90,.3);color:#fff}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step-card{background:#fff;border-radius:14px;padding:32px 24px;text-align:center;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s;position:relative;overflow:hidden}
.step-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#E8375A,#FF8C42)}
.step-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.1)}
.step-num{font-size:36px;font-weight:800;background:linear-gradient(135deg,#E8375A,#FF8C42);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:12px}
.step-card h4{font-size:17px;font-weight:600;margin-bottom:10px}
.step-card p{font-size:14px;color:#777;line-height:1.7}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:28px;transition:all .3s}
.review-card:hover{background:rgba(255,255,255,.1);transform:translateY(-4px)}
.review-stars{color:#FF8C42;font-size:18px;margin-bottom:12px;letter-spacing:2px}
.review-text{font-size:14px;color:rgba(255,255,255,.75);line-height:1.8;margin-bottom:16px;font-style:italic}
.review-author strong{display:block;font-size:14px;color:#fff;margin-bottom:2px}
.review-author span{font-size:12px;color:rgba(255,255,255,.45)}
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid #e8e8e8;border-radius:10px;margin-bottom:12px;overflow:hidden;transition:all .25s}
.faq-item:hover{border-color:#E8375A}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;cursor:pointer;transition:background .25s}
.faq-q:hover{background:rgba(232,55,90,.04)}
.faq-q h4{font-size:15px;font-weight:600;flex:1}
.faq-arrow{font-size:12px;color:#999;transition:transform .3s}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 24px 18px;font-size:14px;color:#666;line-height:1.8}
.contact-grid{display:grid;grid-template-columns:2fr 1fr;gap:32px;align-items:start}
.contact-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:14px;overflow:hidden}
.contact-card img{width:100%;height:240px;object-fit:cover}
.contact-card h4{padding:20px 24px 8px;font-size:20px;font-weight:700}
.contact-card>p{padding:0 24px;font-size:14px;color:rgba(255,255,255,.6);line-height:1.7}
.contact-info{padding:16px 24px 24px}
.contact-info p{font-size:14px;color:rgba(255,255,255,.7);margin-bottom:6px}
.contact-qr{display:flex;flex-direction:column;gap:20px;align-items:center}
.qr-item{text-align:center}
.qr-item img{width:160px;height:160px;border-radius:10px;border:2px solid rgba(255,255,255,.1)}
.qr-item p{margin-top:8px;font-size:13px;color:rgba(255,255,255,.6)}
.share-bar{display:flex;align-items:center;justify-content:center;gap:12px;padding:20px;background:#f5f5f5;font-size:14px;color:#666}
.share-btn{padding:6px 18px;border-radius:20px;font-size:13px;font-weight:600;transition:all .25s}
.share-btn[data-platform="wechat"]{background:#07c160;color:#fff}
.share-btn[data-platform="weibo"]{background:#e6162d;color:#fff}
.share-btn[data-platform="douyin"]{background:#111;color:#fff}
.share-btn[data-platform="bilibili"]{background:#00a1d6;color:#fff}
.share-btn:hover{opacity:.85;transform:translateY(-2px)}
.site-footer{background:#0f0f1e;color:rgba(255,255,255,.7);padding:56px 0 0}
.footer-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
.footer-logo{margin-bottom:14px}
.footer-logo img{height:36px;width:auto}
.footer-col p{font-size:13px;line-height:1.7;color:rgba(255,255,255,.5);margin-bottom:6px}
.footer-col h5{font-size:15px;font-weight:600;color:#fff;margin-bottom:14px;position:relative;padding-bottom:10px}
.footer-col h5::after{content:'';position:absolute;bottom:0;left:0;width:28px;height:2px;background:#E8375A;border-radius:2px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.55);padding:4px 0;transition:color .25s}
.footer-col a:hover{color:#FF8C42}
.footer-qr{display:flex;gap:10px;margin-top:12px}
.footer-qr img{width:60px;height:60px;border-radius:6px;border:1px solid rgba(255,255,255,.1)}
.footer-bottom{text-align:center;padding:24px;margin-top:40px;border-top:1px solid rgba(255,255,255,.06);font-size:13px;color:rgba(255,255,255,.4)}
.footer-bottom a{color:#FF8C42}
.update-time{margin-top:6px;font-size:12px;color:rgba(255,255,255,.3)}
.breadcrumb{padding:16px 0;font-size:13px;color:#999}
.breadcrumb a{color:#E8375A}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span{margin:0 6px;color:#ccc}
.page-hero{background:#1A1A2E;padding:100px 0 48px;text-align:center;color:#fff}
.page-hero h1{font-size:36px;font-weight:800;margin-bottom:12px}
.page-hero p{font-size:16px;color:rgba(255,255,255,.65);max-width:600px;margin:0 auto}
.page-content{padding:48px 0}
.player-wrap{position:relative;width:100%;max-width:900px;margin:0 auto;aspect-ratio:16/9;background:#000;border-radius:12px;overflow:hidden;box-shadow:0 8px 32px rgba(0,0,0,.2)}
.player-wrap video,.player-wrap iframe{width:100%;height:100%;border:none}
.video-detail{max-width:900px;margin:24px auto 0;padding:0 24px}
.video-detail h2{font-size:22px;font-weight:700;margin-bottom:10px}
.video-detail .meta-row{display:flex;gap:20px;font-size:14px;color:#888;margin-bottom:20px;flex-wrap:wrap}
.video-detail .desc{font-size:15px;color:#555;line-height:1.8;margin-bottom:24px}
.related-section{max-width:900px;margin:40px auto;padding:0 24px}
.related-section h3{font-size:20px;font-weight:700;margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:1024px){
.video-grid{grid-template-columns:repeat(3,1fr)}
.service-grid{grid-template-columns:repeat(2,1fr)}
.expert-grid{grid-template-columns:1fr}
.steps-grid{grid-template-columns:repeat(2,1fr)}
.review-grid{grid-template-columns:repeat(2,1fr)}
.footer-inner{grid-template-columns:1fr 1fr}
.related-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:768px){
.main-nav{display:none;position:absolute;top:64px;left:0;right:0;background:#1A1A2E;flex-direction:column;padding:16px;border-top:1px solid rgba(255,255,255,.08)}
.main-nav.open{display:flex}
.mobile-menu-btn{display:flex}
.header-search{display:none}
.hero-content h1{font-size:28px}
.hero-sub{font-size:15px}
.hero-stats{gap:24px}
.stat-item strong{font-size:22px}
.video-grid{grid-template-columns:repeat(2,1fr)}
.service-grid{grid-template-columns:1fr}
.community-wrap{grid-template-columns:1fr}
.partner-wall{grid-template-columns:repeat(2,1fr)}
.steps-grid{grid-template-columns:1fr}
.review-grid{grid-template-columns:1fr}
.contact-grid{grid-template-columns:1fr}
.footer-inner{grid-template-columns:1fr}
.section-head h2{font-size:24px}
.section-block{padding:48px 0}
.page-hero h1{font-size:26px}
.related-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:480px){
.video-grid{grid-template-columns:1fr}
.hero-btns{flex-direction:column;align-items:flex-start}
.hero-stats{flex-direction:column;gap:12px;align-items:flex-start}
.related-grid{grid-template-columns:1fr}
}