/* 独立视觉层便于维护；保留既有内容与交互，仅重组呈现方式。 */
:root{--primary:#174b86;--text:#1c2d43;--muted:#68778a;--pale:#f3f6fa;--line:#dfe6ef;--shadow:0 8px 24px rgba(24,52,84,.06)}
body{font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;background:#fff;color:var(--text)}
.container{max-width:1200px}.section{padding:64px 0}.section-heading{margin-bottom:32px;text-align:center}.section-heading h2{font-size:30px;line-height:1.5;color:#193858}.section-heading h2:after{content:"";display:block;width:42px;height:3px;background:#bd9856;margin:16px auto}.section-heading p{font-size:15px;color:#718094;line-height:1.9}
.site-header,.is-home:not(.scrolled) .site-header{height:80px;background:#fff;color:#203750;box-shadow:0 2px 12px #102e5010}.header-inner{max-width:1264px;gap:20px}.brand-text strong{font-size:21px}.brand-text small{color:#9a7947;letter-spacing:2.5px}.site-header nav{gap:26px}.site-header nav>a{font-size:15px}.is-home:not(.scrolled) .site-header nav>a:after{display:block}.header-phone,.is-home:not(.scrolled) .header-phone .icon{color:var(--primary)}.header-consult{background:#174b86;box-shadow:none;padding:9px 20px;border-radius:5px}.is-inner main{padding-top:80px}
.button{border-radius:5px;min-height:44px;font-size:15px;padding:10px 24px;font-weight:600}.button.blue,.button.accent{background:#174b86;color:white;box-shadow:none}.button.yellow{background:#b89250;color:#fff;box-shadow:none}.button.white{box-shadow:none;color:#174b86}.button:hover{box-shadow:0 6px 14px #163b7420;transform:translateY(-2px)}
/* 左文右图取代整屏背景，使首屏重点和联系方式更清晰。 */
.hero{height:auto;min-height:580px;padding:140px 0 68px;background:linear-gradient(110deg,#f4f7fb,#edf3fa);color:#193858;border-bottom:1px solid #e2e9f1}.hero-shade{display:none}.hero-inner{max-width:1200px;width:calc(100% - 64px);display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}.hero-copy{max-width:none;margin:0}.hero-copy:before{content:"腾龙公司 · 客户服务";display:block;font-size:15px;letter-spacing:2px;color:#9a7947;margin-bottom:18px}.hero-copy h1{font-size:36px;line-height:1.65;margin-bottom:20px;font-weight:700}.hero-copy>p{font-size:16px;line-height:2;color:#63748a}.hero .cta-buttons{margin-top:28px;gap:14px;flex-wrap:wrap}.hero-visual{margin:0;position:relative;border-radius:12px;box-shadow:16px 18px 0 #dfe8f2;overflow:hidden;border:6px solid #fff}.hero .hero-poster{position:static;width:100%;height:320px;object-fit:cover}.metrics{background:#fff;box-shadow:none;border-bottom:1px solid #e3eaf2;padding:0}.metrics .container{display:grid;grid-template-columns:repeat(5,1fr);padding:24px 0}.metric{border-right:1px solid #e4eaf1;justify-content:center}.metric:last-child{border:0}.metric strong{color:#174b86}.metric img{opacity:.75}
.service-platform{background:#fff}.platform-row{gap:24px}.platform-main{border:1px solid #dfe7f0;background:#f2f6fb;border-radius:10px;box-shadow:none}.platform-copy{padding:32px;width:50%}.platform-copy h3{font-size:27px;color:#193858;margin-bottom:16px}.platform-copy .button{margin-top:24px}.platform-assistant{background:#e8eff6;border:1px solid #dfe7f0;border-radius:10px}.platform-assistant h3 span,.assistant-phone strong{color:#174b86}.assistant-phone{border-radius:7px;outline:none;box-shadow:var(--shadow)}.feature-grid{margin-top:24px;gap:18px}.feature-card{border:1px solid #e1e7ee;border-radius:8px;min-height:180px;padding:25px}.feature-card h3{font-size:20px}.feature-card p{max-width:78%;margin-top:20px}.feature-card img{width:95px;opacity:.55}.feature-card:hover{background:#f6f9fc;border-color:#99b2cf;box-shadow:var(--shadow);transform:translateY(-3px)}.feature-card:hover p{margin-top:20px}.feature-more{color:#174b86;opacity:1;transform:none;margin-top:12px}.channels{margin-top:44px}.channels>h2{font-size:27px;margin-bottom:24px}.channel-cards{border:1px solid #dfe7f0;box-shadow:none}.channel-card{background:#fff;padding:28px 24px}.channel-card.active{background:#edf3fa}.channel-line{background:#b89250}.channel-more{color:#174b86}
.scene-section{background:#f1f5f9}.scene-section .section-heading h2{color:#193858}.scene-section .section-heading p{color:#68788b;opacity:1}.scene-tabs{justify-content:center;gap:0;padding:0;border-bottom:1px solid #d6e0eb;margin-bottom:28px}.scene-tabs button{color:#4c6079;border-radius:0;padding:14px 20px;border-bottom:3px solid transparent;font-size:16px}.scene-tabs button.active{color:#174b86;background:#fff;border-bottom-color:#174b86;box-shadow:none}.scene-main,.scene-side{border-radius:8px;box-shadow:none}.scene-side{background:#fff;border:1px solid #dde5ef;padding:30px}.scene-main>div{padding:40px}.scene-main h3,.scene-side h3{font-size:24px}.scene-contacts{background:#f3f6fa}
.case-section{background:#fff}.case-cards{gap:20px}.case-card{border:1px solid #e1e7ef;border-radius:8px;box-shadow:none}.case-card>img{height:150px}.case-tag{font-size:20px;margin-bottom:14px}.topic-grid{grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}.topic-grid a{border:1px solid #e3e9f0;background:#f8fafc}.case-progress{margin:28px auto}.why-section{background:#f5f7fa}.why-section .section-heading{text-align:center}.why-box{background:#e8eff7;border-radius:10px;box-shadow:none;border:1px solid #dee6ef}.why-top{padding:32px 40px;gap:36px}.why-top strong{color:#174b86}.why-top>div:nth-child(3){max-width:30%}.why-bottom{padding:28px 0;border-radius:0 0 10px 10px;box-shadow:none}.why-bottom article{padding:0 32px}.why-bottom h3{font-size:22px}
.home-news{background:#fff}.news-tabs{justify-content:center;margin-bottom:28px;gap:12px}.news-tabs a,.news-tabs a:first-child,.news-tabs a:last-child,.news-tabs a.active{border-radius:5px;padding:8px 24px;background:#f0f4f8;color:#52657b}.news-tabs a.active{background:#174b86;color:#fff}.news-grid{gap:22px}.news-card{border:1px solid #dfe6ee;border-radius:8px;box-shadow:none}.news-card:hover{transform:translateY(-3px);border-color:#9bb3cc;box-shadow:var(--shadow)}.news-cover,.news-card:nth-child(3n+2) .news-cover,.news-card:nth-child(3n) .news-cover{height:150px;background:#edf2f8}.news-cover>span{margin-left:24px}.news-cover small{display:none}.news-cover b{font-size:23px;color:#345675}.news-cover img{width:38%;height:130px;object-fit:contain;right:14px;bottom:0;opacity:.85}.news-content{padding:22px}.category,.news-card:nth-child(3n+2) .category,.news-card:nth-child(3n) .category{background:#edf3fa;color:#174b86;padding:3px 9px}.news-card h3{font-size:18px;line-height:1.7;min-height:62px;color:#203b59}.news-card p{color:#748194;margin-bottom:20px}.news-card time{font-size:12px;color:#788698}.news-card-bottom{border-color:#e7edf3}.all-news{border:1px solid #cbd8e6;width:max-content;margin:28px auto 0;padding:10px 28px;border-radius:5px}
.contact-band{background:#193e68;padding:40px 0}.contact-band h2{font-size:25px;font-weight:600}.contact-band:before,.contact-band:after{display:none}.center-contact{gap:24px}.center-contact>div{flex-wrap:wrap;justify-content:center}.contact-band .phone-replacement{color:#e3c58e}.site-footer{background:#102b49;color:#bac8d8}.footer-columns{gap:28px;padding:40px 0}.footer-columns h3{color:#fff;font-size:17px}.live-date{font-size:13px;color:#a9bbce}.detail-hero{background:#edf3fa;color:#193858;padding:54px 0;border-bottom:1px solid #dce5ef}.detail-hero h1{font-size:36px;margin:10px 0 16px}.detail-hero p{color:#647990}.detail-body{max-width:1200px}.detail-grid article,details{border-radius:8px;border-color:#dfe7ef}.resource-grid{gap:18px}.resource-grid a{padding:24px;border-radius:7px;border-color:#dfe6ef;border-top:3px solid #c8d7e8;background:#fff;transition:.2s}.resource-grid a:hover{background:#f5f8fc;border-color:#8aa8c9;transform:translateY(-2px)}.resource-grid strong{font-size:17px;line-height:1.75}.resource-grid small{color:#8a7350}.resource-grid span{color:#174b86}.fixed-contact{border:1px solid #dfe6ef;box-shadow:0 4px 20px #15345215}.fixed-online{background:#174b86!important}.fixed-phone{color:#174b86!important}:focus-visible{outline-color:#b89250}
@media(max-width:1100px){.header-inner{gap:14px}.site-header nav{gap:18px}.header-contact{gap:10px}.header-phone{display:none}.hero-inner{gap:30px}.hero-copy h1{font-size:30px}.hero .hero-poster{height:290px}.platform-copy{padding:24px}.topic-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.footer-columns{padding:36px 0}}
@media(max-width:768px){.container,.hero-inner{width:calc(100% - 40px)}.section{padding:42px 0}.section-heading h2{font-size:25px}.section-heading p{font-size:14px}.site-header,.is-home:not(.scrolled) .site-header{height:68px}.header-inner{padding:0 20px}.header-consult{display:none}.menu-toggle{display:block;color:#174b86}.site-header nav{background:#fff!important;color:#203750!important;top:68px!important;box-shadow:0 8px 16px #173a6010}.is-inner main{padding-top:68px}.hero{padding:104px 0 42px;min-height:0}.hero-inner{grid-template-columns:1fr;gap:26px}.hero-copy{max-width:600px}.hero-copy h1{font-size:30px!important;line-height:1.6}.hero-copy:before{font-size:13px;margin-bottom:12px}.hero-copy>p{font-size:15px}.hero-visual{box-shadow:8px 8px 0 #dfe8f2}.hero .hero-poster{height:250px}.metrics .container{grid-template-columns:repeat(3,1fr);gap:18px 0;padding:24px 0}.metric{padding:0 8px}.metric img{width:25px;height:30px;object-fit:contain}.metric strong{font-size:24px}.metric span{font-size:12px}.metric:nth-child(3){border:0}.platform-copy{width:52%;padding:24px}.platform-copy h3{font-size:24px}.platform-row{grid-template-columns:1fr}.platform-assistant{min-height:300px}.feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.channels{margin-top:32px}.channel-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.channel-card,.channel-card.active{height:auto;min-height:190px;padding:24px 20px;border-bottom:1px solid #dfe7f0}.channel-card h3{font-size:20px;white-space:normal}.channel-card.active p{max-width:100%}.channel-card img{display:none}.scene-tabs{overflow-x:auto;justify-content:flex-start;gap:0}.scene-tabs button{font-size:14px;padding:12px 15px;flex:0 0 auto}.scene-panel{grid-template-columns:1fr;gap:18px}.scene-main>div{padding:30px}.scene-main p{min-height:0;max-width:100%}.scene-side{padding:25px}.case-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.why-top{padding:25px;gap:20px;flex-wrap:wrap}.why-top>div{min-width:90px}.why-top>div:nth-child(3){max-width:55%;position:relative;z-index:1}.why-top>img{opacity:.3;width:45%}.why-bottom{grid-template-columns:1fr;padding:0}.why-bottom article{padding:24px;border-right:0;border-bottom:1px solid #e4eaf1}.news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.news-cover{height:130px!important}.news-content{padding:18px}.news-tabs{gap:8px}.news-tabs a{padding:8px 18px!important}.contact-band{padding:34px 0}.contact-band h2{font-size:22px}.center-contact{flex-direction:column;gap:16px}.center-contact strong{font-size:21px}.footer-columns{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}.detail-hero{padding:36px 0}.detail-hero h1{font-size:30px}.detail-hero p{font-size:14px}.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.fixed-contact{background:#fff;border-radius:0}.fixed-contact a{color:#174b86}.fixed-contact .fixed-online{color:#fff}}
@media(max-width:480px){.container,.hero-inner{width:calc(100% - 32px)}.header-inner{padding:0 16px}.brand-text strong{font-size:18px!important}.hero-copy h1{font-size:27px!important}.hero .hero-poster{height:205px}.hero .cta-buttons{gap:10px}.hero .button{padding:10px 16px;font-size:14px}.section-heading h2{font-size:23px}.section-heading p{line-height:1.8}.metrics .container{grid-template-columns:repeat(2,minmax(0,1fr))}.metric{justify-content:flex-start;padding-left:14px}.metric:nth-child(2n){border:0}.metric:nth-child(3){border-right:1px solid #e4eaf1}.platform-main{display:block}.platform-copy{width:100%;padding:24px}.platform-illustration{width:100%;min-height:260px}.platform-copy .button{margin-top:20px}.feature-grid{gap:12px}.feature-card{padding:18px;min-height:190px}.feature-card h3{font-size:18px}.feature-card p{max-width:100%;font-size:13px}.feature-card img{width:65px;opacity:.18}.feature-more{font-size:13px}.channel-card,.channel-card.active{padding:20px 16px}.channel-card p{font-size:13px}.case-cards{gap:12px}.case-card>img{height:110px}.case-card>div{padding:18px 14px}.case-tag{font-size:17px;gap:5px}.case-card p{font-size:13px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-grid a{font-size:12px;white-space:normal;padding:8px;height:auto;min-height:48px}.scene-main>div{padding:24px}.scene-actions{flex-wrap:wrap;gap:10px}.scene-actions .button{font-size:13px;padding:9px 14px}.why-top>div:nth-child(3){max-width:100%}.why-top>img{display:none}.why-top strong{font-size:32px}.news-grid,.resource-grid,.detail-grid{grid-template-columns:1fr}.news-cover{height:145px!important}.news-card h3{min-height:0;margin-bottom:12px}.news-content{padding:20px}.news-tabs a{font-size:14px;padding:8px 13px!important}.footer-columns{gap:24px 16px}.footer-columns h3{font-size:16px}.center-contact>div{gap:8px}.center-contact strong{font-size:20px}.contact-band h2{font-size:21px}.resource-grid a{padding:20px}.detail-hero h1{font-size:28px}}
/* 动态横幅单独恢复全宽，其他内容继续沿用商务视觉。 */
.hero{height:700px;min-height:0;padding:80px 0 0;background:#33495c;color:#fff;border:0}.hero-inner{display:flex;align-items:center;height:100%;position:relative;z-index:2}.hero-copy{max-width:600px}.hero-copy:before{color:#f0d9ab}.hero-copy h1{font-size:38px;color:#fff;text-shadow:0 2px 12px #10243b50}.hero-copy>p{color:#f0f4f9;text-shadow:0 1px 5px #10243b80}.hero .hero-poster,.hero .hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;pointer-events:none}.hero .hero-poster{height:100%!important}.hero .hero-video{opacity:0;transition:opacity .6s;z-index:1}.hero .hero-video.active.is-ready{opacity:1}.hero .hero-shade{display:block;z-index:1;background:linear-gradient(90deg,rgba(12,31,53,.72),rgba(12,31,53,.28) 60%,rgba(12,31,53,.08))}.hero-dots{z-index:3}.video-toggle{z-index:3;border:1px solid #ffffff70;border-radius:5px;background:#102c4666;color:#fff;padding:8px 14px}.hero .hero-dots button{width:28px;height:4px;border-radius:2px;background:#ffffff70}.hero .hero-dots button.active{background:#e8c585}
@media(max-width:768px){.hero{height:620px;padding:68px 0 0}.hero-inner{display:flex;width:calc(100% - 40px)}.hero-copy{max-width:540px}.hero-copy h1{font-size:32px!important}.hero-copy>p{font-size:15px}.hero .hero-poster,.hero .hero-video{object-position:62% center}.hero .hero-shade{background:linear-gradient(90deg,#10273fc4,#10273f60)}.video-toggle{bottom:24px;right:20px;font-size:12px}}
@media(max-width:480px){.hero{height:580px}.hero-inner{width:calc(100% - 32px)}.hero-copy h1{font-size:28px!important}.hero-copy>p{line-height:1.9}.hero .hero-dots{left:16px;transform:none;bottom:30px}.video-toggle{right:16px;bottom:22px}}
@media(prefers-reduced-motion:reduce){.hero .hero-video{transition:none}}
/* 固定操作按钮在右侧，避免继承左右定位后遮住左侧场景切换。 */
.hero .video-toggle{left:auto;right:32px}
@media(max-width:768px){.hero .video-toggle{right:20px}}
@media(max-width:480px){.hero .video-toggle{right:16px}}