:root{
--bg:#F8FAFC;--card:#FFF;--line:#E2E8F0;--line2:#EDF2F7;--ink:#0F172A;--muted:#64748B;
--teal:#2563EB;--teal-deep:#1E3A8A;--teal-soft:#DBEAFE;--orange:#F97316;--orange-d:#EA580C;--orange-soft:#FFEDD5;
--gold:#FBBF24;--gold-btn:#e3bc64;--gold-deep:#D4A745;--gold-soft:#FEF9C3;--red:#E11D48;--red-soft:#FFE4E6;--shadow:0 6px 18px rgba(30,58,138,.06);
--nav-bg:rgba(248,250,252,.92);--r:16px;--hero-sub:#BFDBFE;--hero-stat:#FDE047;
}
*,::before,::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans SC','PingFang SC',sans-serif;background:var(--bg);color:var(--ink);line-height:1.75;}
h1,h2,h3,.serif{font-family:'Noto Serif SC','Songti SC',serif}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
img{display:block;max-width:100%}
.btn{display:inline-block;border-radius:999px;font-weight:700;cursor:pointer;border:none;text-decoration:none;text-align:center;transition:.2s}
.btn-orange{background:var(--orange);color: #fff;padding:12px 26px;box-shadow:0 6px 16px rgba(247,127,0,.35)}
.btn-orange:hover{background:var(--orange-d);transform:translateY(-1px)}
/* 暗金带光泽按钮（全站统一 CTA） */
.btn-gold{background:#e3bc64;color:var(--teal-deep);padding:12px 26px;box-shadow:0 6px 20px rgba(227,188,100,.35);font-weight:800;position:relative;overflow:hidden;z-index:1;}
.btn-gold:hover{background:#d4a745;transform:translateY(-1px);box-shadow:0 10px 25px rgba(227,188,100,.45);}
.btn-gold::after{content:'';position:absolute;top:-50%;left:-75%;width:30%;height:200%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.45),transparent);transform:skewX(-25deg);transition:left 0.6s ease;z-index:2;pointer-events:none;}
.btn-gold:hover::after{left:125%;}
.btn-gold .btn-sub{color:var(--teal-deep);opacity:.85;}
.nav-cta.btn-gold{box-shadow:0 0 12px rgba(227,188,100,.35);}
.btn-light{background:#fff;color:var(--teal-deep);padding:12px 22px;box-shadow:0 6px 16px rgba(0,0,0,.22)}
.btn-light:hover{background:#EFF6FF;transform:translateY(-1px)}
html[lang="en"] body{line-height:1.65}
html[lang="en"] h1{font-size:42px;line-height:1.22;letter-spacing:0}
html[lang="en"] h2{line-height:1.25;letter-spacing:0}
html[lang="en"] h3{line-height:1.35;letter-spacing:0}
html[lang="en"] .kicker{letter-spacing:3px}
html[lang="en"] .card p,html[lang="en"] .lead{text-wrap:pretty}
section[id]{scroll-margin-top:84px}
/* ===== 顶栏（旧版链接样式保留给 login/dashboard 等页） ===== */
.topbar{background:var(--teal-deep);color:rgba(255,255,255,.9);font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;padding:7px 20px;flex-wrap:wrap;gap:2px 14px}
.topbar a{color:rgba(255,255,255,.9);text-decoration:none;margin-left:14px;cursor:pointer;white-space:nowrap}
.topbar a:hover{color:#fff}
.tb-tab.active{color:#fff;background:rgba(255,255,255,.12);}
.topbar-links{white-space:nowrap}
/* ===== 顶栏四受众入口标签（不吸顶） ===== */
.tb-tabs{display:flex;justify-content:center;align-items:stretch;height:38px;width:100%;}
.tb-tab{position:relative;display:inline-flex;align-items:center;margin:0;padding:0 26px;color:rgba(255,255,255,.72);font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;text-decoration:none;transition:color .2s;}
.tb-tab + .tb-tab::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:1px;height:14px;background:rgba(255,255,255,.22);}
.tb-tab:hover{color:#fff;}
.tb-tab.active{color:#fcfcfc; background:rgba(250, 250, 250, 0.35);}
header.nav{position:sticky;top:0;background:var(--nav-bg);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:50}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:66px;gap:12px}
.logo{display:inline-flex;align-items:center;flex:none}
.logo-img{height:40px;width:auto;display:block}
nav.links{display:flex;align-items:center;min-width:0}
nav.links a{color:var(--teal);text-decoration:none;margin:0 20px;font-size:15px;white-space:nowrap}
nav.links a:hover{color:var(--orange)}
.nav-actions{display:flex;align-items:center;gap:10px;flex:none}
.lang-menu{position:relative;display:inline-block;flex:none}
.lang-hamb{border:1.5px solid var(--teal);background:var(--card);color:var(--teal);height:40px;padding:0 13px;border-radius:999px;font-size:13px;font-weight:700;transition:.2s;cursor:pointer;white-space:nowrap;font-family:inherit;display:inline-flex;align-items:center;gap:6px}
.lang-hamb:hover{background:var(--teal);color:#fff}
.lang-hamb .caret{font-size:10px;opacity:.7}
.lang-dropdown{position:absolute;right:0;top:calc(100% + 8px);z-index:80;min-width:150px;background:var(--card);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:6px;display:flex;flex-direction:column;gap:2px}
.lang-dropdown button{border:none;background:transparent;color:var(--ink);text-align:left;padding:10px 14px;border-radius:8px;font-size:13.5px;font-weight:700;cursor:pointer;transition:.15s;font-family:inherit}
.lang-dropdown button:hover{background:var(--teal-soft);color:var(--teal-deep)}
.lang-dropdown button.active{background:var(--teal);color:#fff}
.lang-dropdown[hidden]{display:none}
.nav-cta{height:40px;display:inline-flex;align-items:center;justify-content:center;padding:0 20px;font-size:14px;line-height:1;white-space:nowrap;flex:none;align-self:center;transform:translateY(-1px)}
.nav-actions .lang-hamb,.nav-actions .nav-cta{height:40px;min-height:40px;max-height:40px;padding-top:0;padding-bottom:0;display:inline-flex;align-items:center;align-self:center;line-height:1;box-sizing:border-box}
.nav-cta:hover{transform:translateY(-2px)}
html[lang="bn"] .nav-actions .lang-hamb,html[lang="bn"] .nav-actions .nav-cta{height:42px;min-height:42px;max-height:42px}
.hero{position:relative;overflow:hidden;padding:64px 0 56px;background:var(--teal-deep)}
.hero .wrap{position:relative;z-index:1}
.hero h1{color:#fff;margin:0 0 12px;line-height:1.35;text-wrap:balance}
.hero .sub{color:var(--hero-sub);font-size:17px;line-height:2.05;text-wrap:pretty}
.hero .kicker{color:var(--gold)}
.hero-kicker{margin-bottom:16px}
.hero-in{display: grid;grid-template-columns:1fr 1.2fr;gap:40px;align-items:stretch}
.hero-left{display:flex;flex-direction:column;min-width:0}
.hero-right{display:flex;flex-direction:column;min-width:0;padding-top:6px}
.kicker{display:flex;align-items:center;gap:10px;color:var(--teal);font-size:13px;font-weight:700;letter-spacing:2px}
.kicker::before{content:'';width:26px;height:3px;background:var(--gold)}
.sec .kicker{justify-content:center;margin-bottom:6px}
h1{font-size:38px;line-height:1.45;color:var(--teal-deep);margin:14px 0 12px}
.sub{color:var(--muted);font-size:16.5px;max-width:560px}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin:14px 0 20px}
.chip2{border:1px solid rgba(255,255,255,.35);background:rgba(255,255,255,.12);color:#fff;border-radius:999px;padding:4px 12px;font-size:13.5px;font-weight:700;backdrop-filter:blur(4px)}
.promise{border-left:4px solid var(--gold);background:rgba(251,191,36,.14);color:#FDE68A;font-family:'Noto Serif SC',serif;font-size:17px;font-weight:700;padding:10px 16px;margin:16px 0 6px;border-radius:0 10px 10px 0;line-height:1.9;text-wrap:pretty}
.hero-left .promise{margin-top:auto;margin-bottom:8px}
.hero-left .stats{margin-top:auto;padding-top:0}
.stats{display:grid;grid-template-columns:1fr 1fr;margin-top:22px}
.stat{padding-right:22px;min-width:0}
.stat+.stat{border-left:1px solid rgba(255,255,255,.25);padding-left:22px}
.stat b{font-family:'Noto Serif SC',serif;font-size:30px;color:var(--hero-stat)}
.stat span{display:block;font-size:14px;font-weight:700;color:rgba(255,255,255,.92);margin-top:2px}
.stat em{display:block;font-style:normal;font-size:13px;color:var(--hero-sub);margin-top:2px}
html[lang="en"] .stat span,html[lang="bn"] .stat span{font-size:13px}
html[lang="en"] .stat em,html[lang="bn"] .stat em{font-size:12px}
.video-ph{position:relative;flex:1;min-height:300px;width:100%;overflow:hidden;border-radius:var(--r);border:1px solid rgba(255,255,255,.22);background:rgba(0,0,0,.22)}
.video-ph video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.right-bottom{margin-top:20px;padding-top:0;display:flex;flex-direction:column}
.cta-row-hero{display:flex;justify-content:center}
.cta-row-hero .btn{width:min(420px,100%);min-height:64px;border-radius:999px;padding:10px 24px;font-size:15px;line-height:1.35;display:inline-flex;flex-direction:column;align-items:center;justify-content:center}
.btn-main{display:block;text-wrap:balance;overflow-wrap:break-word}
.btn-sub{display:block;font-size:11.5px;font-weight:700;color:#B45309;margin-top:3px;letter-spacing:.02em;text-wrap:balance;overflow-wrap:break-word}
.btn-orange .btn-sub{color:rgba(255,255,255,.88)}
html[lang="en"] .cta-row-hero .btn{font-size:16px}
html[lang="en"] .btn-sub{font-size:11px}
html[lang="bn"] .cta-row-hero .btn{font-size:14.5px;line-height:1.5}
html[lang="bn"] .btn-sub{font-size:11.5px}
/* ===== 合作伙伴滚动横幅 ===== */
.marquee-section{padding:56px 0;background:var(--bg);overflow:hidden;position:relative;}
.marquee-section::before,.marquee-section::after{content:'';position:absolute;top:0;width:120px;height:100%;z-index:2;pointer-events:none;}
.marquee-section::before{left:0;background:linear-gradient(90deg,var(--bg) 0%,transparent 100%);}
.marquee-section::after{right:0;background:linear-gradient(90deg,transparent 0%,var(--bg) 100%);}
.marquee-title{font-size:34px;color:var(--teal-deep);text-align:center;margin:0 0 34px;line-height:1.25;letter-spacing:0}
.marquee-title::before,.marquee-title::after{content:'';display:inline-block;width:32px;height:3px;background:var(--gold);vertical-align:middle;margin:0 14px}
.marquee-track{display:flex;align-items:center;width:max-content;animation:marqueeScroll 31s linear infinite;}
.marquee-track:hover{animation-play-state:paused;}
@keyframes marqueeScroll{0%{transform:translateX(0);}100%{transform:translateX(-25%);}}
.partner-tile{flex:0 0 auto;width:240px;padding:0 20px;display:flex;flex-direction:column;align-items:center;gap:16px;opacity:.9;transition:opacity .25s ease,transform .25s ease;}
.partner-tile:hover{opacity:1;transform:translateY(-3px);}
.partner-logo-box{display:flex;align-items:center;justify-content:center;height:72px;width:100%}
.partner-logo{display:block;height:48px;width:auto;max-width:200px;object-fit:contain}
.partner-logo.mid{height:56px;max-width:120px}
.partner-logo.tall{height:64px;max-width:110px}
.partner-rel{font-size:12px;color:var(--muted);text-align:center;line-height:1.45;min-height:2.9em;}
@media(max-width:768px){.partner-tile{width:200px;padding:0 14px;gap:14px}.partner-logo-box{height:56px}.partner-logo{height:38px;max-width:170px}.partner-logo.mid{height:44px;max-width:100px}.partner-logo.tall{height:52px;max-width:90px}.marquee-section::before,.marquee-section::after{width:60px;}.marquee-title{font-size:26px;margin-bottom:24px}.marquee-title::before,.marquee-title::after{width:22px;margin:0 10px}}
.sec{padding:52px 0}
.sec h2{font-size:34px;color:var(--teal-deep);text-align:center}
/* 板块主标题两侧金色横杠 */
.sec h2::before,.sec h2::after{content:'';display:inline-block;width:32px;height:3px;background:var(--gold);vertical-align:middle;margin:0 14px}
.lead{text-align:center;color:var(--muted);max-width:660px;margin:10px auto 32px;text-wrap:balance;font-size:18px;}
#features,#professional,#events,#why-us{background:var(--card);border-block:1px solid var(--line)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px 24px 20px;box-shadow:var(--shadow);overflow:hidden}
.card h3{color:var(--teal-deep);font-size:17px;margin-bottom:6px}
.card p{font-size:14px;color:var(--muted)}
/* 产品特性媒体区：单图铺满 */
.feat-media{position:relative;overflow:hidden;aspect-ratio:4/3;margin:-24px -24px 14px;border-radius:0}
.tint-orange{background:var(--orange-soft)}
.tint-teal{background:var(--teal-soft)}
.tint-gold{background:var(--gold-soft)}
.tint-red{background:var(--red-soft)}
.feat-photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.tag{display:inline-block;border-radius:8px;padding:2px 10px;font-size:12px;font-weight:700;margin-bottom:8px}
.tag.orange{background:var(--orange-soft);color:var(--orange-d)}
.tag.gold{background:var(--gold-soft);color:#8A6A00}
.tag.teal{background:var(--teal-soft);color:var(--teal)}
.tag.red{background:var(--red-soft);color:var(--red)}
.phil-ed{display:grid;grid-template-columns:repeat(3,1fr);margin:34px 0 40px;align-items:stretch}
.phil-col{padding:4px 28px;display:flex;flex-direction:column}
.phil-col:first-child{padding-left:0}
.phil-col+.phil-col{border-left:1px solid var(--line)}
.phil-col .no{display:block;font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--orange-d);margin-bottom:8px}
.phil-col b{display:block;font-family:'Noto Serif SC',serif;font-size:24px;font-weight:800;color:var(--teal-deep);margin-bottom:10px;line-height:1.3;text-wrap:balance}
.phil-col i{font-style:normal;font-size:13px;color:var(--muted)}
html[lang="en"] .phil-col b,html[lang="bn"] .phil-col b{font-size:22px;min-height:2.6em}
.split-card{display:grid;grid-template-columns:.9fr 1.1fr;background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);margin-bottom:8px}
.split-card.rev{grid-template-columns:1.1fr .9fr}
.split-card.rev .split-body{order:1}
.split-card.rev .split-img{order:2}
.split-img{position:relative;min-height:360px;background:var(--teal-soft)}
.car{position:absolute;inset:0;overflow:hidden}
.car-track{display:flex;height:100%;transition:transform .5s ease}
.car-slide{flex:0 0 100%;position:relative;display:flex;align-items:center;justify-content:center}
.car-slide img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.car-slide img ~ .slide-label{display:none}
.slide-label{font-family:'Noto Serif SC',serif;font-size:22px;font-weight:800;color:var(--teal-deep);opacity:.4}
.img-cap{position:absolute;left:14px;bottom:14px;background:rgba(15,23,42,.45);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;backdrop-filter:blur(4px)}
.car-btn{position:absolute;top:50%;transform:translateY(-50%);width:32px;height:32px;border-radius:50%;border:none;background:rgba(255,255,255,.85);color:var(--teal-deep);font-size:18px;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.12);z-index:2}
.car-btn.prev{left:10px}
.car-btn.next{right:10px}
.car-dots{position:absolute;bottom:14px;right:14px;display:flex;gap:6px;z-index:2}
.car-dots button{width:8px;height:8px;border-radius:50%;border:none;background:rgba(15,23,42,.22);cursor:pointer;padding:0}
.car-dots button.on{background:var(--teal);width:18px;border-radius:99px}
.split-body{padding:30px 34px}
.loop-h{font-family:'Noto Serif SC',serif;font-size:16px;font-weight:800;color:var(--teal-deep);display:flex;align-items:center;gap:8px;margin:0 0 12px}
.loop-h::before{content:'';width:26px;height:3px;background:var(--gold)}
.m-row{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line2);align-items:flex-start}
.m-row:last-of-type{border-bottom:none}
.m-row .no{font-size:12px;font-weight:800;color:var(--orange-d);letter-spacing:.08em;padding-top:3px;flex:none}
.m-row b{display:block;font-size:15px;color:var(--teal-deep)}
.m-row span.d{display:block;font-size:12.5px;color:var(--muted);text-wrap:pretty}
.flag{padding:0 0 18px;border-bottom:1px solid var(--line2);margin-bottom:18px}
.flag-k{display:flex;align-items:center;gap:8px;font-size:12.5px;font-weight:800;letter-spacing:.1em;color:var(--orange-d)}
.flag-k::before{content:'';width:18px;height:3px;background:var(--gold)}
.flag-t{display:block;font-family:'Noto Serif SC',serif;font-size:22px;font-weight:800;color:var(--teal-deep);margin:6px 0}
.flag-d{font-size:13px;color:var(--muted);text-wrap:pretty}
.aud-pill{display:inline-block;border-radius:8px;padding:2px 10px;font-size:11px;font-weight:800;letter-spacing:.02em;margin-top:8px}
.aud-pill.biz{background:var(--red-soft);color:var(--red)}
.aud-pill.stu{background:var(--teal-soft);color:var(--teal)}
.aud-pill.gold{background:var(--gold-soft);color:#8A6A00}
.aud-pill.vio{background:#EDE9FE;color:#6D28D9}
.subh{text-align:center;font-family:'Noto Serif SC',serif;font-size:20px;font-weight:800;color:var(--teal-deep);margin:40px 0 12px}
.subh::before,.subh::after{content:'';display:inline-block;width:26px;height:3px;background:var(--gold);vertical-align:middle;margin:0 12px}
.subh-left{text-align:left;margin:24px 0 12px}
.subh-left::before,.subh-left::after{display:none}
.t-photo{width:100%;height:210px;object-fit:cover;object-position:top center;border-radius:12px;margin-bottom:14px;background:var(--teal-soft)}
.t-card{position:relative;padding-bottom:44px;}
.t-card .role{font-size:12.5px;color:var(--orange-d);font-weight:700}
/* 教师卡 more 链接：放大至 16px，取消下划线 */
.t-more{position:absolute;right:18px;bottom:14px;font-size:16px;font-weight:700;color:var(--teal);text-decoration:none;transition:color .2s;cursor:pointer;}
.t-more:hover{color:var(--orange-d);}
/* 教师详情弹窗 */
.teacher-mask{position:fixed;inset:0;z-index:210;display:flex;align-items:center;justify-content:center;padding:24px;background:rgba(2,8,23,.45);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);}
.teacher-mask[hidden]{display:none;}
.teacher-card{position:relative;width:100%;max-width:560px;max-height:82vh;overflow:auto;background:#fff;border-radius:var(--r);padding:32px 32px 26px;box-shadow:0 24px 60px rgba(2,8,23,.35);}
.teacher-card h3{color:var(--teal-deep);font-size:22px;}
.teacher-card .role{font-size:12.5px;color:var(--orange-d);font-weight:700;margin:2px 0 6px;}
.t-sec{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:800;color:var(--teal-deep);margin:16px 0 8px;font-family:'Noto Serif SC',serif;}
.t-sec::before{content:'';width:18px;height:3px;background:var(--gold);}
.teacher-card ul{list-style:none;}
.teacher-card li{position:relative;padding-left:16px;margin:6px 0;font-size:13.5px;color:var(--muted);line-height:1.75;}
.teacher-card li::before{content:'';position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--gold);}
.t-close{position:absolute;top:14px;right:14px;width:32px;height:32px;border-radius:8px;border:none;background:transparent;color:var(--muted);font-size:16px;cursor:pointer;transition:.2s;}
.t-close:hover{background:var(--red-soft);color:var(--red);}
.t-pane[hidden]{display:none;}
/* ===== 为什么选择我们（方案A 抽屉） ===== */
#why-us{background:var(--card);border-block:1px solid var(--line)}
.acc-a{max-width:820px;margin:0 auto}
.acc-a .acc-item{background:var(--bg);border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:border-color .3s,box-shadow .3s,background .3s}
.acc-a .acc-item.open{background:#fff;border-color:rgba(227,188,100,.55);box-shadow:0 12px 32px rgba(15,23,42,.07)}
.acc-a .acc-head{display:flex;align-items:center;gap:18px;width:100%;text-align:left;border:none;background:transparent;cursor:pointer;font-family:inherit;padding:22px 26px}
.acc-a .acc-num{font-family:'Noto Serif SC',serif;font-weight:800;font-size:22px;color:#D4A745;flex:none;width:46px;line-height:1}
.acc-a .acc-title{font-family:'Noto Serif SC',serif;font-size:19px;font-weight:800;color:var(--teal-deep);flex:1;line-height:1.5;transition:color .25s}
.acc-a .acc-head:hover .acc-title{color:var(--teal)}
.acc-a .acc-icon{position:relative;width:18px;height:18px;flex:none}
.acc-a .acc-icon::before,.acc-a .acc-icon::after{content:'';position:absolute;background:var(--teal);border-radius:2px;transition:transform .4s ease}
.acc-a .acc-icon::before{left:50%;top:0;width:2px;height:100%;transform:translateX(-50%)}
.acc-a .acc-icon::after{top:50%;left:0;height:2px;width:100%;transform:translateY(-50%)}
.acc-a .acc-item.open .acc-icon::before{transform:translateX(-50%) scaleY(0)}
.acc-a .acc-body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .5s cubic-bezier(.25,.8,.25,1)}
.acc-a .acc-item.open .acc-body{grid-template-rows:1fr}
.acc-a .acc-body-inner{overflow:hidden}
.acc-a .acc-desc{color:var(--muted);font-size:15px;line-height:1.9;padding:0 26px 26px 90px}
/* ===== 最终 CTA（无卡片，暗金胶囊按钮） ===== */
#final.final-modern{position:relative;background:var(--bg);padding:96px 0;overflow:hidden;min-height:480px;display:flex;align-items:center;}
.final-image-layer{position:absolute;right:0;top:0;width:55%;height:100%;z-index:1;}
.final-image-layer img{width:100%;height:100%;object-fit:cover;object-position:center right;display:block;}
.final-gradient-overlay{position:absolute;inset:0;z-index:2;background:linear-gradient(90deg,var(--bg) 0%,var(--bg) 50%,rgba(248,250,252,0) 100%);pointer-events:none;}
.final-content-wrap{position:relative;z-index:3;width:100%;}
.final-title{font-family:'Noto Serif SC',serif;font-size:40px;font-weight:800;color:var(--ink);line-height:1.3;margin-bottom:16px;letter-spacing:-0.02em;max-width:520px;}
.final-desc{font-size:18px;color:var(--muted);line-height:1.7;margin-bottom:32px;max-width:460px;}
.btn-final.btn-gold{display:inline-flex;align-items:center;gap:10px;padding:16px 36px;font-size:16px;border-radius:999px;white-space:nowrap;}
.btn-final.btn-gold svg{width:18px;height:18px;flex:none;transition:transform .3s ease;}
.btn-final.btn-gold:hover svg{transform:translateX(4px);}
footer{background:var(--teal-deep);color:rgba(255,255,255,.75);padding:44px 0;font-size:14px}
.f-in{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.f-in h4{color:#fff;margin-bottom:10px;font-family:'Noto Serif SC',serif}
.f-in a{display:block;color:rgba(255,255,255,.75);text-decoration:none;margin:4px 0}
.f-in a:hover{color:#fff}
.f-in a[data-fl]{cursor:pointer}
.f-in a.active { color: var(--gold); }
/* 页脚品牌两行（字号稍大） */
.f-brand-name{font-size:17px;font-weight:800;color:#fff;font-family:'Noto Serif SC',serif;margin-bottom:6px;}
.f-brand-pow{font-size:13.5px;color:rgba(255,255,255,.65);}
.f-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:30px;padding-top:18px;font-size:12.5px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
.f-bottom .footer-social{display:flex;gap:10px;align-items:center}
.f-bottom .footer-social a{width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.1);border-radius:50%;color:rgba(255,255,255,.8);transition:.2s}
.f-bottom .footer-social a:hover{background:var(--gold);color:var(--teal-deep)}
.f-bottom .footer-social svg{width:14px;height:14px}
html[lang="bn"] body{font-family:'Noto Sans Bengali','Noto Sans SC',sans-serif;line-height:1.9;font-size:16px}
html[lang="bn"] h1,html[lang="bn"] h2,html[lang="bn"] h3,html[lang="bn"] .phil-col b,html[lang="bn"] .slide-label,html[lang="bn"] .loop-h,html[lang="bn"] .subh,html[lang="bn"] .flag-t,html[lang="bn"] .acc-title,html[lang="bn"] .final-title{font-family:'Noto Serif Bengali','Noto Sans SC',serif;letter-spacing:0}
html[lang="bn"] h1{font-size:32px;line-height:1.55}
html[lang="bn"] h2{font-size:34px;line-height:1.5}
html[lang="bn"] h3{line-height:1.6;font-size:18px}
html[lang="bn"] .kicker{letter-spacing:0;font-size:14px}
html[lang="bn"] .topbar{font-size:14px}
html[lang="bn"] nav.links a{font-size:16px}
html[lang="bn"] .lang-hamb{font-size:14px;padding:0 14px}
html[lang="bn"] .nav-cta{font-size:14px;padding:0 18px}
html[lang="bn"] .lead{font-size:19px}
html[lang="bn"] .sub{font-size:17px}
html[lang="bn"] .promise{font-size:17px}
html[lang="bn"] .phil-col i,html[lang="bn"] .m-row span.d,html[lang="bn"] .flag-d,html[lang="bn"] .acc-desc{font-size:13.5px}
html[lang="bn"] .btn{padding:14px 26px;font-size:16px}
html[lang="bn"] .card h3{font-size:18px}
html[lang="bn"] .card p{overflow-wrap:anywhere;font-size:15px}
html[lang="bn"] .chip2{font-size:13.5px}
html[lang="bn"] .tag{line-height:1.7;font-size:13px}
html[lang="bn"] .stat b{font-size:30px}
html[lang="bn"] .stat span{font-size:14px}
html[lang="bn"] .stat em{font-size:13px}
html[lang="bn"] footer{font-size:15px}
html[lang="en"] .phil-col b{letter-spacing:0}
html[lang="en"] .subh{font-size:19px}
/* =========================================================
板块二 · FEATURE（明星课程＋游学）
========================================================= */
/* ----- 明星课程卡 ----- */
.g3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.g4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;align-items:stretch}
.sc-card{position:relative;overflow:visible;background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column;padding:0;--band:#F1F5F9;--bandline:var(--gold)}
.sc-card:hover{transform:translateY(-5px);box-shadow:0 18px 38px rgba(30,58,138,.15)}
.sc-card.hot{--band:#0f2a6b;--bandline:var(--gold);background:var(--teal-deep);border-color:var(--teal-deep);transform:translateY(-4px);box-shadow:0 18px 40px rgba(30,58,138,.35)}
.sc-card.hot:hover{transform:translateY(-8px);box-shadow:0 22px 46px rgba(30,58,138,.4)}
/* 头部区域：因删除 tag，padding-top 微调 */
.sc-head{background:var(--band);border-bottom:2px solid var(--bandline);border-radius:15px 15px 0 0;padding:26px 18px 12px}
.sc-hot-pill{
    position:absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    top: -16px !important;          /* 改为 -26px，让标签完全在卡片上方 */
    left:50%;
    transform:translateX(-50%);
    
    /* 其他样式保持不变 */
}

.sc-card{
    margin-top: 14px;    /* 给卡片顶部留出空间 */
}
/* 标题：确保没有 tag 时对齐正常 */
.sc-name{font-size:22px;color:var(--teal-deep);line-height:1.3;margin-top:0}
.sc-sub{font-size:12.5px;color:var(--muted);margin-top:2px}
.sc-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.sc-pitch{font-size:13.5px;color:var(--ink);margin-bottom:10px}
.sc-list{list-style:none;display:flex;flex-direction:column;gap:7px;margin-bottom:16px;flex:1}
.sc-list li{position:relative;padding-left:20px;font-size:12.5px;color:var(--muted)}
.sc-list li::before{content:'';position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:var(--gold)}
.sc-bignum{border-top:1px dashed var(--line2);padding-top:14px;text-align:center;margin-bottom:14px}
/* 课时：<b> 放大成主视觉；耗时：<span> 降为下方小字 */
.sc-bignum b{display:block;font-family:inherit;font-size:20px;font-weight:800;color:var(--teal-deep);line-height:1.3;letter-spacing:0}
.sc-bignum span{display:block;font-size:12.5px;color:var(--muted);margin-top:5px}
/* 第 4 张卡（自主课程）：两句已互换，「1000+ 课程」在上方，
   字号/颜色完全跟随前三张的课时设定（20px · var(--teal-deep)），不再单独覆盖 */
/* 价格按钮：显式取消下划线 */
.sc-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 48px;
    box-sizing: border-box;
    background: var(--gold-btn);
    color: var(--teal-deep);
    border-radius: 999px;
    padding: 12px 18px;
    font-family: 'Noto Serif SC', serif;
    font-size: 16px;
    font-weight: 900;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-decoration: none;
    transition: .2s;
}
.sc-cta:hover{background:var(--gold);transform:translateY(-1px);text-decoration:none}
.sc-card.hot .sc-name{color:#fff}
.sc-card.hot .sc-sub{color:rgba(255,255,255,.65)}
.sc-card.hot .sc-pitch{color:#E7EEFF}
.sc-card.hot .sc-list li{color:rgba(255,255,255,.78)}
.sc-card.hot .sc-bignum{border-top-color:rgba(255,255,255,.2)}
.sc-card.hot .sc-bignum b{color:#fff}
.sc-card.hot .sc-bignum span{color:rgba(255,255,255,.7)}
/* 第 4 张卡（自主课程）：pv_c4s 三语已统一精简为「1000+ 课程 / 1,000+ lessons /
   ১,০০০+ লেসন」，20px 最宽仅 ~143px，远低于卡片净宽 215.5px，无需单独降级字号，
   直接跟随 .sc-bignum b 基础规则（EN/zh 20px；bn 走下方 html[lang="bn"] 全局 18px，
   与前三张卡同规则），四张卡内部完全一致。 */

/* =========================================
   核心修改：右上角宽胶囊标签
   ========================================= */
.sc-hot-pill {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--gold);
    color: var(--teal-deep);
    padding: 6px 16px; /* 加宽内边距 */
    border-radius: 999px; /* 保持胶囊形状 */
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    z-index: 10;
    white-space: nowrap;
    line-height: 1.4;
}

/* 针对孟加拉语的特殊微调：因为字符较高，稍微增加上下内边距 */
html[lang="bn"] .sc-hot-pill {
    font-size: 11px;
    padding: 7px 16px;
}

/* ----- 录播课卡片：绿色调区分 ----- */
.sc-card.rec{--band:#ECFDF5;--bandline:#16A34A}
.sc-card.rec .sc-name{color:#166534}
.sc-card.rec .sc-pill{
  position:absolute;top:12px;right:12px;
  background:#16A34A;color:#fff;
  padding:6px 16px;border-radius:999px;
  font-size:12px;font-weight:800;letter-spacing:.5px;
  box-shadow:0 2px 8px rgba(22,163,74,.25);z-index:10;white-space:nowrap;line-height:1.4;
}

/* ----- 游学横幅（无下划线＋hover 浮起） ----- */
.tour{margin-top:24px;border-radius:var(--r);overflow:hidden;display:grid;grid-template-columns:1.15fr .85fr;background:linear-gradient(120deg,var(--teal-deep),#274a9c 60%,#3a5fb0);box-shadow:0 16px 34px rgba(30,58,138,.2);transition:transform .25s ease,box-shadow .25s ease}
.tour:hover{transform:translateY(-4px);box-shadow:0 22px 46px rgba(30,58,138,.32)}
.tour-text{padding:40px;color:#fff;display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.tour-title{font-size:24px;line-height:1.4;color:#fff}
.tour-desc{font-size:14px;color:#E7EEFF;line-height:1.7}
.tour-tracks p{font-size:13px;color:#E7EEFF;line-height:1.9}
.tour-tracks b{color:var(--gold);font-weight:800;margin-right:2px}
.tour-tags{display:flex;gap:8px;flex-wrap:wrap}
.tour-tags span{background:rgba(255,255,255,.14);border-radius:8px;padding:4px 12px;font-size:11.5px;font-weight:700;color:rgba(255,255,255,.92)}
.tour-cta{display:inline-block;background:var(--gold-btn);color:var(--teal-deep);border:none;border-radius:999px;padding:12px 30px;font-size:15px;font-weight:800;margin-top:4px;font-family:inherit;cursor:pointer;transition:.2s;text-decoration:none}
.tour-cta:hover{background:var(--gold);transform:translateY(-1px);text-decoration:none}

/* ============ 游学介绍弹窗 ============ */
.tour-intro-mask{position:fixed;inset:0;z-index:190;display:flex;align-items:center;justify-content:center;padding:24px;background:rgba(15,23,42,.5);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.tour-intro-mask[hidden]{display:none}
.tour-intro-card{position:relative;width:100%;max-width:680px;background:#fff;color:var(--ink);border-radius:20px;padding:74px 48px 40px;text-align:center;box-shadow:0 28px 70px rgba(2,8,23,.4);animation:popIn .25s ease}
@keyframes popIn{from{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:none}}
.tour-intro-close{position:absolute;top:20px;right:20px;width:40px;height:40px;border:none;background:rgba(15,23,42,.5);color:#fff;font-size:18px;line-height:1;cursor:pointer;border-radius:50%;display:flex;align-items:center;justify-content:center;z-index:6;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px);transition:.2s}
.tour-intro-close:hover{background:rgba(15,23,42,.78)}
.tour-intro-media{position:relative;width:100%;aspect-ratio:16/9;margin-bottom:20px;border-radius:14px;overflow:hidden;background:#0e7490}
.tour-intro-video{width:100%;height:100%;object-fit:cover;display:block}
.tour-intro-brand{font-size:20px;font-weight:800;color:var(--teal-deep);margin:0 0 12px}
.tour-intro-text{font-size:15px;line-height:1.8;color:var(--muted);margin:0 0 22px}
.tour-intro-cta{display:block;width:100%;border:none;border-radius:99px;background:var(--teal);color:#fff;font-size:16px;font-weight:800;padding:14px 24px;cursor:pointer;font-family:inherit;transition:.2s}
.tour-intro-cta:hover{background:var(--teal-deep);transform:translateY(-1px)}
.tour-intro-later{display:block;margin:18px auto 0;background:none;border:none;color:var(--muted);font-size:14.5px;padding:6px 0;cursor:pointer;font-family:inherit;text-decoration:underline;text-underline-offset:3px}
.tour-intro-later:hover{color:var(--teal-deep)}
.tour-visual{position:relative;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 70% 30%,rgba(251,191,36,.28),rgba(251,191,36,0) 60%)}
.tour-visual b{font-family:'Noto Serif SC',serif;font-weight:900;font-size:140px;color:rgba(251,191,36,.32);line-height:1;user-select:none}
/* ----- i18n 防破（长文案可换行） ----- */
.lead,.tour-desc,.tour-tracks p,.sc-pitch,.sc-list li,.tour-tags span{overflow-wrap:break-word;min-width:0}
/* ----- 明星课程 en/bn 适配 ----- */
html[lang="en"] .sc-name,html[lang="bn"] .sc-name{font-size:20px}
html[lang="bn"] .sc-bignum b{font-size:18px;line-height:1.4}
html[lang="bn"] .sc-bignum span{font-size:13px;line-height:1.5}
html[lang="bn"] .tour-title{font-size:22px;line-height:1.6}
html[lang="en"] .sc-cta{font-size:16px}
html[lang="bn"] .sc-cta{font-size:14px}
@media(max-width:900px){
.hero-in{grid-template-columns:1fr}
.hero-right{padding-top:0}
.video-ph{flex:none;aspect-ratio:16/9;min-height:0}
.right-bottom{margin-top:24px}
.grid3,.g3{grid-template-columns:1fr}
.grid4,.g4{grid-template-columns:repeat(2,1fr)}
nav.links{display:none}
.logo-img{height:32px}
h1{font-size:30px}
html[lang="en"] h1{font-size:32px}
html[lang="bn"] h1{font-size:28px}
.stat{padding-right:24px}
.stat+.stat{padding-left:24px}
.phil-ed{grid-template-columns:1fr;gap:22px}
.phil-col{padding:0}
.phil-col+.phil-col{border-left:none;border-top:1px solid var(--line);padding-top:20px}
html[lang="en"] .phil-col b,html[lang="bn"] .phil-col b{min-height:0}
.split-card,.split-card.rev{grid-template-columns:1fr}
.split-card.rev .split-img{order:-1}
.split-img{min-height:240px}
.sc-card.hot{transform:none}
.tour{grid-template-columns:1fr}
.tour-visual{min-height:160px}
.tour-text{padding:32px 24px}
#final.final-modern{flex-direction:column;min-height:auto;padding:64px 0;}
.final-image-layer{position:relative;width:100%;height:240px;order:2;margin-top:40px;}
.final-gradient-overlay{background:linear-gradient(180deg,var(--bg) 0%,var(--bg) 20%,rgba(248,250,252,0) 100%);}
.final-content-wrap{padding:0 20px;text-align:center;}
.final-title{font-size:32px;margin-left:auto;margin-right:auto;}
.final-desc{font-size:16px;margin-left:auto;margin-right:auto;}
}
/* ============ 登录弹窗（白卡 + 灰色模糊遮罩） ============ */
.auth-mask{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:24px;background:rgba(15,23,42,.45);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);}
.auth-mask[hidden]{display:none}
.auth-card{position:relative;width:100%;max-width:440px;max-height:86vh;overflow:auto;background:#fff;color:var(--ink);border-radius:var(--r);padding:34px 32px 28px;box-shadow:0 24px 60px rgba(2,8,23,.35);}
.auth-close{position:absolute;top:14px;right:14px;width:32px;height:32px;border-radius:8px;border:none;background:transparent;color:var(--muted);font-size:16px;cursor:pointer;transition:.2s;}
.auth-close:hover{background:var(--red-soft);color:var(--red)}
.auth-logo{display:block;height:46px;width:auto;margin:0 auto 22px;}
.auth-tabs{display:flex;gap:4px;background:var(--bg);border:1px solid var(--line);border-radius:99px;padding:4px;margin-bottom:22px;}
.auth-tab{flex:1;border:none;background:transparent;color:var(--muted);font-size:13.5px;font-weight:700;padding:9px 12px;border-radius:99px;cursor:pointer;transition:.2s;}
.auth-tab:hover{color:var(--teal-deep);background:var(--teal-soft)}
.auth-tab.on{background:var(--teal);color:#fff;box-shadow:0 4px 10px rgba(2,8,23,.18)}
.auth-pane{display:flex;flex-direction:column;gap:14px}
.auth-pane[hidden]{display:none}
.auth-pane .f{display:flex;flex-direction:column;gap:6px}
.auth-pane .f label{font-size:12.5px;font-weight:700;color:var(--ink)}
.auth-pane .f input{border:1.5px solid var(--line);border-radius:10px;padding:11px 14px;font-size:14px;font-family:inherit;color:var(--ink);background:var(--card);transition:.2s;}
.auth-pane .f input:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 4px var(--teal-soft)}
.f-row{display:flex;gap:8px}
.f-row input{flex:1;min-width:0}
.code-btn{flex:none;border:1px solid var(--teal);background:var(--teal-soft);color:var(--teal-deep);border-radius:10px;padding:0 14px;font-size:12.5px;font-weight:700;cursor:pointer;white-space:nowrap;transition:.2s;}
.code-btn:hover:not(:disabled){background:var(--teal);color:#fff}
.code-btn:disabled{opacity:.5;cursor:not-allowed}
.auth-err{background:var(--red-soft);color:var(--red);border:1px solid var(--red);border-radius:10px;padding:10px 14px;font-size:13px;font-weight:600;}
.auth-err[hidden]{display:none}
.auth-submit{width:100%;margin-top:18px;padding:13px;font-size:15px}
.auth-submit:disabled{opacity:.6;cursor:not-allowed}
.auth-alt{display:flex;justify-content:space-between;gap:10px;margin-top:16px;flex-wrap:wrap}
.auth-alt a{font-size:12.5px;color:var(--teal);text-decoration:none;font-weight:600}
.auth-alt a:hover{color:var(--orange-d);text-decoration:underline}
body.no-scroll{overflow:hidden}
/* 精准定位 data-i18n="idx_more" 的元素并添加下划线 */
[data-i18n="idx_more"] {
    text-decoration: underline;
    text-underline-offset: 4px; /* 让下划线稍微往下移一点，视觉上更透气、更现代 */
    text-decoration-thickness: 1.5px; /* 稍微加粗下划线，使其更清晰 */
    text-decoration-color: var(--blue); /* 可选：将下划线颜色改为品牌橙色，增加设计感 */
}

/* 如果你希望鼠标悬停时效果有变化，可以加上 hover 状态 */
[data-i18n="idx_more"]:hover {
    text-decoration-color: var(--teal); /* 悬停时变成深蓝色 */
}