/* r4 - 全幅沉浸风格 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"PingFang SC",sans-serif;background:#fff;color:#18181b;font-size:16px;line-height:1.6}
a{color:#a855f7;text-decoration:none}
.r4-container{max-width:1200px;margin:0 auto;padding:0 24px}
.r4-nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0;position:absolute;top:0;left:0;right:0;z-index:100;max-width:1200px;margin:0 auto;padding:16px 24px}.r4-nav .r4-brand{font-weight:800;font-size:18px;color:#fff;display:flex;align-items:center;gap:8px;text-shadow:0 1px 4px rgba(0,0,0,0.3)}.r4-nav .r4-brand img{height:30px}.r4-nav .r4-links{display:flex;gap:6px}.r4-nav .r4-links a{padding:7px 16px;border-radius:50px;font-size:13px;font-weight:500;color:rgba(255,255,255,0.85)}.r4-nav .r4-links a:hover{background:rgba(255,255,255,0.1)}.r4-nav .drop{position:relative}.r4-nav .drop-menu{display:none;position:absolute;top:100%;right:0;background:#fff;border-radius:10px;min-width:150px;padding:4px 0;box-shadow:0 4px 20px rgba(0,0,0,0.1)}.r4-nav .drop:hover .drop-menu{display:block}.r4-nav .drop-menu a{display:block;padding:8px 16px;font-size:13px;color:#333}
.r4-btn{display:inline-block;padding:10px 26px;border-radius:50px;font-size:14px;font-weight:700;cursor:pointer;border:none}.r4-btn-purple{background:#a855f7;color:#fff}.r4-btn-white{background:#fff;color:#a855f7}
.r4-hero{min-height:85vh;background:linear-gradient(135deg,#4c1d95,#7c3aed,#a855f7);display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;position:relative;overflow:hidden}.r4-hero .r4-hero-inner{position:relative;z-index:1;max-width:650px;padding:0 20px}.r4-hero .r4-hero-inner .r4-tag{display:inline-block;padding:4px 16px;background:rgba(255,255,255,0.1);border-radius:50px;font-size:12px;font-weight:600;margin-bottom:20px}.r4-hero .r4-hero-inner h1{font-size:52px;font-weight:800;line-height:1.1;margin-bottom:14px}.r4-hero .r4-hero-inner p{font-size:17px;opacity:0.8;margin-bottom:28px}
.r4-stats{display:flex;justify-content:space-around;padding:40px 0;text-align:center}.r4-stat .rs-val{font-size:42px;font-weight:800;color:#a855f7}.r4-stat .rs-lbl{font-size:13px;color:#71717a;margin-top:4px}
.r4-grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:30px 0}.r4-card{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,0.06);transition:.3s}.r4-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(0,0,0,0.1)}.r4-card .rc-thumb{height:200px;overflow:hidden}.r4-card .rc-thumb img{width:100%;height:100%;object-fit:cover;transition:.5s}.r4-card:hover .rc-thumb img{transform:scale(1.06)}.r4-card .rc-body{padding:18px 20px}.r4-card .rc-body h4{font-size:17px;font-weight:700}.r4-card .rc-body .rc-meta{font-size:12px;color:#a1a1aa;margin-top:4px}
.r4-hgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:30px 0}.r4-hcard{display:flex;background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 4px 16px rgba(0,0,0,0.04)}.r4-hcard .rh-img{width:220px;flex-shrink:0}.r4-hcard .rh-img img{width:100%;height:100%;object-fit:cover}.r4-hcard .rh-body{padding:28px}.r4-hcard .rh-body .rh-tag{display:inline-block;background:#f3e8ff;color:#a855f7;border-radius:4px;padding:3px 10px;font-size:10px;font-weight:700;margin-bottom:10px}.r4-hcard .rh-body h4{font-size:19px;font-weight:700}.r4-hcard .rh-body p{font-size:14px;color:#71717a}
.r4-faq .fq{background:#fff;border-radius:12px;margin-bottom:8px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,0.03)}.r4-faq .fq .q{padding:16px 24px;font-weight:700;cursor:pointer;display:flex;justify-content:space-between}.r4-faq .fq .q::after{content:'+'}.r4-faq .fq.open .q::after{content:'−'}.r4-faq .fq .a{padding:0 24px;max-height:0;overflow:hidden;transition:.3s;color:#71717a}.r4-faq .fq.open .a{padding:0 24px 16px;max-height:240px}
.r4-cta{text-align:center;padding:60px 0;background:linear-gradient(135deg,#f3e8ff,#faf5ff);border-radius:20px;margin:30px 0}.r4-cta h2{font-size:30px;font-weight:800}.r4-cta p{color:#71717a;margin-bottom:24px}
.r4-partners{overflow:hidden;padding:24px 0}.r4-partners .track{display:flex;gap:20px;animation:r4p 24s linear infinite;width:fit-content}.r4-partners .item{flex-shrink:0;padding:14px 24px}.r4-partners .item img{height:36px;opacity:0.4}.r4-partners .item:hover img{opacity:1}@keyframes r4p{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}
.r4-footer{background:#18181b;color:#71717a;padding:50px 0 24px;font-size:13px;text-align:center}.r4-footer a{color:#71717a}.r4-footer a:hover{color:#a855f7}
.r4-detail{padding-top:24px}.r4-row{display:flex;gap:24px;flex-wrap:wrap}.r4-col-main{flex:2}.r4-col-side{flex:1;min-width:240px}.r4-pcard{background:#fff;border-radius:16px;margin-bottom:16px;box-shadow:0 2px 8px rgba(0,0,0,0.03);overflow:hidden}.r4-pcard-hd{padding:16px 20px;border-bottom:1px solid #f4f4f5;font-weight:700}.r4-pcard-bd{padding:20px}.r4-bread{font-size:12px;color:#a1a1aa;padding:10px 0}.r4-art-item{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid #fafafa}.r4-art-item .art-t{width:160px;height:110px;border-radius:10px;overflow:hidden;flex-shrink:0}.r4-art-item .art-t img{width:100%;height:100%;object-fit:cover}.r4-art-item .art-i h4{font-size:15px;font-weight:700}.r4-art-item .art-i .art-d{font-size:13px;color:#a1a1aa;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.r4-list-i{padding:8px 0;border-bottom:1px solid #fafafa}.r4-list-i a{color:#3f3f46;font-size:13px}.r4-tags{display:flex;gap:6px;flex-wrap:wrap}.r4-tags a{padding:5px 12px;background:#faf5ff;color:#a855f7;border-radius:8px;font-size:11px}.r4-pag{display:flex;justify-content:center;gap:6px;padding:24px 0}.r4-pag a,.r4-pag span{padding:8px 16px;background:#fff;border-radius:10px;font-size:13px;color:#71717a;box-shadow:0 1px 3px rgba(0,0,0,0.03)}.r4-pag a:hover{background:#a855f7;color:#fff}.r4-pag .active span{background:#a855f7;color:#fff}.r4-404{text-align:center;padding:100px 20px}
@media(max-width:768px){.r4-nav{position:relative;background:rgba(76,29,149,0.95);padding:12px 16px;flex-wrap:wrap;gap:6px;justify-content:center}.r4-nav .r4-brand{width:100%;justify-content:center}.r4-hero{min-height:60vh}.r4-hero h1{font-size:34px}.r4-grid3{grid-template-columns:1fr}.r4-hgrid{grid-template-columns:1fr}}
.r4-tagstrip a{padding:5px 16px;background:#f3e8ff;color:#a855f7;border-radius:4px;font-size:11px;font-weight:600}.r4-tagstrip a:hover{background:#a855f7;color:#fff}
.r4-icon{text-align:center;padding:26px 18px;background:#fff;border-radius:16px;box-shadow:0 4px 20px rgba(0,0,0,0.04)}.r4-icon .pi-img{width:54px;height:54px;margin:0 auto 12px;overflow:hidden;border-radius:10px}.r4-icon .pi-img img{width:100%;height:100%;object-fit:cover}.r4-icon h4{font-size:14px;font-weight:700}.r4-icon p{font-size:12px;color:#888}
.r4-review{text-align:center;padding:22px 16px;background:#fff;border-radius:16px;box-shadow:0 4px 20px rgba(0,0,0,0.04)}.r4-review .pr-stars{font-size:14px;color:#a855f7;margin-bottom:6px}.r4-review .pr-text{font-size:12px;color:#666;line-height:1.7}.r4-review .pr-name{font-weight:700;font-size:12px;margin-top:6px}
@media(max-width:768px){.r4-icons{grid-template-columns:1fr 1fr}.r4-reviews{grid-template-columns:1fr}}