/* ============================================
   eb-binance.com — EDU_03 eLearning / Indigo
   ============================================ */
:root{
  --pri:#5b5fe4;--pri-dark:#4a4ed0;--pri-light:#eef0ff;--pri-bg:#f6f7ff;
  --dark:#191b3a;--text:#636585;--text2:#9496b5;--bg:#fff;
  --green:#10b981;--red:#ef4444;--orange:#f59e0b;
  --grad:linear-gradient(135deg,#5b5fe4 0%,#7b7ff0 50%,#9b9ef8 100%);
  --grad-dark:linear-gradient(135deg,#191b3a 0%,#282b52 100%);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;color:var(--dark);background:#fff;line-height:1.7;font-size:16px}
a{color:var(--pri);text-decoration:none;transition:color .2s}
a:hover{color:var(--pri-dark)}
img{max-width:100%}
.container{max-width:1120px;margin:0 auto;padding:0 24px}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;border-radius:10px;cursor:pointer;border:2px solid transparent;transition:all .25s;font-size:15px;padding:12px 28px;text-decoration:none;line-height:1.4}
.btn--pri{background:var(--pri);color:#fff;border-color:var(--pri);box-shadow:0 4px 14px rgba(91,95,228,.3)}
.btn--pri:hover{background:var(--pri-dark);border-color:var(--pri-dark);color:#fff;transform:translateY(-1px)}
.btn--outline{background:transparent;color:var(--pri);border-color:var(--pri)}
.btn--outline:hover{background:var(--pri);color:#fff}
.btn--white{background:#fff;color:var(--pri);border-color:#fff}
.btn--white:hover{background:var(--pri-light)}
.btn--outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn--outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff}
.btn--sm{padding:8px 20px;font-size:13px}
.btn--lg{padding:14px 32px;font-size:16px}
.btn--full{width:100%}
.btn--ghost{background:transparent;color:var(--dark);border-color:rgba(0,0,0,.1)}
.btn--ghost:hover{border-color:var(--pri);color:var(--pri)}

/* Section */
.sec{padding:80px 0}
.sec--alt{background:var(--pri-bg)}
.sec-badge{display:inline-block;color:var(--pri);font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:2px;margin-bottom:8px}
.sec-title{font-size:30px;font-weight:800;color:var(--dark);margin-bottom:12px;line-height:1.3}
.sec-desc{font-size:15px;color:var(--text);max-width:540px;line-height:1.7}
.sec-center{text-align:center}
.sec-center .sec-desc{margin:0 auto}

/* ===== Header (eLearning: white bg, logo+nav+2 CTA) ===== */
.hdr{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 1px 0 rgba(0,0,0,.06);transition:box-shadow .3s}
.hdr.scrolled{box-shadow:0 2px 20px rgba(91,95,228,.08)}
.hdr__inner{display:flex;align-items:center;height:68px;gap:20px}
.hdr__brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:18px;color:var(--dark);flex-shrink:0}
.hdr__brand svg{width:28px;height:28px}
.hdr__nav{display:flex;gap:4px;margin-left:auto}
.hdr__nav a{font-size:14px;color:var(--text);font-weight:500;padding:8px 14px;border-radius:8px;transition:all .2s}
.hdr__nav a:hover{color:var(--pri);background:var(--pri-light)}
.lang-switch{display:flex;gap:3px}
.lang-switch a{font-size:11px;padding:3px 7px;border-radius:4px;color:var(--text2);font-weight:600;transition:all .15s}
.lang-switch a:hover,.lang-switch a.active{color:var(--pri);background:var(--pri-light)}
.hdr__ctas{display:flex;gap:8px;align-items:center}
.hdr__cta{padding:8px 20px;border-radius:8px;font-size:13px;font-weight:700;white-space:nowrap;transition:all .2s}
.hdr__cta--outline{color:var(--pri);border:2px solid var(--pri);background:transparent}
.hdr__cta--outline:hover{background:var(--pri);color:#fff}
.hdr__cta--fill{background:var(--pri);color:#fff;border:2px solid var(--pri);box-shadow:0 2px 8px rgba(91,95,228,.25)}
.hdr__cta--fill:hover{background:var(--pri-dark);border-color:var(--pri-dark);color:#fff}
.hdr__burger{display:none;background:none;border:none;color:var(--dark);cursor:pointer}
.hdr__burger svg{width:24px;height:24px}
@media(max-width:768px){.hdr__nav,.lang-switch,.hdr__cta--outline{display:none}.hdr__burger{display:block}}

/* Mobile */
.mob{display:none;position:fixed;inset:0;background:rgba(255,255,255,.98);z-index:200;flex-direction:column;align-items:center;justify-content:center;gap:20px}
.mob--open{display:flex}
.mob__close{position:absolute;top:16px;right:16px;background:none;border:none;cursor:pointer;color:var(--dark)}
.mob__close svg{width:28px;height:28px}
.mob a{font-size:1.1rem;color:var(--dark);font-weight:500}
.mob a:hover{color:var(--pri)}
.mob__lang{display:flex;gap:8px;margin-top:12px}
.mob__lang a{font-size:.85rem;padding:6px 12px;border-radius:4px;color:var(--text)}
.mob__lang a.on{background:var(--pri-light);color:var(--pri)}

/* ===== Hero (eLearning: left text + search element, right decorative) ===== */
.hero{background:var(--grad);color:#fff;padding:80px 0 60px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:10%;right:-5%;width:380px;height:380px;background:radial-gradient(circle,rgba(255,255,255,.08) 0%,transparent 70%);border-radius:50%}
.hero::after{content:'';position:absolute;bottom:-10%;left:20%;width:260px;height:260px;background:radial-gradient(circle,rgba(255,255,255,.06) 0%,transparent 70%);border-radius:50%}
.hero .container{position:relative;z-index:1;display:flex;align-items:center;gap:48px}
.hero__left{flex:1;max-width:560px}
.hero__badge{display:inline-block;background:rgba(255,255,255,.18);color:#fff;font-size:12px;font-weight:600;padding:6px 18px;border-radius:50px;margin-bottom:20px;backdrop-filter:blur(4px)}
.hero__title{font-size:clamp(28px,5vw,44px);font-weight:800;line-height:1.15;margin-bottom:18px}
.hero__desc{font-size:16px;opacity:.9;margin-bottom:28px;line-height:1.8}
.hero__search{display:flex;background:rgba(255,255,255,.15);border-radius:14px;padding:6px;backdrop-filter:blur(6px);max-width:440px;margin-bottom:32px}
.hero__search input{flex:1;background:transparent;border:none;outline:none;color:#fff;padding:12px 16px;font-size:15px}
.hero__search input::placeholder{color:rgba(255,255,255,.6)}
.hero__search button{background:#fff;color:var(--pri);border:none;padding:12px 24px;border-radius:10px;font-weight:700;font-size:14px;cursor:pointer;white-space:nowrap;transition:all .2s}
.hero__search button:hover{background:var(--pri-light)}
.hero__btns{display:flex;gap:14px;flex-wrap:wrap}
@media(max-width:768px){.hero .container{flex-direction:column;text-align:center}.hero__left{max-width:100%}.hero__search{max-width:100%}.hero__btns{justify-content:center}}

/* Trust strip */
.trust-strip{padding:28px 0;border-bottom:1px solid #f0f0f0}
.trust-strip__inner{display:flex;align-items:center;justify-content:center;gap:36px;flex-wrap:wrap;opacity:.5}
.trust-strip__item{font-size:14px;font-weight:700;color:var(--dark);letter-spacing:1px;display:flex;align-items:center;gap:6px}
.trust-strip__item svg{width:20px;height:20px}

/* ===== 3 Course/Feature Cards (eLearning: icon + colored top bar) ===== */
.feat3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:48px}
@media(max-width:768px){.feat3{grid-template-columns:1fr;gap:20px}}
.feat3__card{background:#fff;border-radius:16px;padding:32px 28px;text-align:center;box-shadow:0 2px 20px rgba(0,0,0,.04);border-top:4px solid var(--pri);transition:all .3s}
.feat3__card:hover{box-shadow:0 12px 32px rgba(91,95,228,.12);transform:translateY(-5px)}
.feat3__icon{width:64px;height:64px;background:var(--pri-light);border-radius:16px;display:flex;align-items:center;justify-content:center;margin:0 auto 18px;color:var(--pri)}
.feat3__title{font-size:17px;font-weight:700;color:var(--dark);margin-bottom:8px}
.feat3__desc{font-size:14px;color:var(--text);line-height:1.7;margin-bottom:16px}
.feat3__link{font-size:13px;color:var(--pri);font-weight:600}
.feat3__card--link{display:block;text-decoration:none;cursor:pointer}

/* ===== Advantages (eLearning: icon-left list) ===== */
.adv-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:36px}
@media(max-width:768px){.adv-grid{grid-template-columns:1fr}}
.adv-item{display:flex;gap:18px;background:#fff;border-radius:14px;padding:24px;box-shadow:0 2px 14px rgba(0,0,0,.04);transition:all .3s;border:2px solid transparent;align-items:flex-start}
.adv-item:hover{border-color:var(--pri);box-shadow:0 8px 28px rgba(91,95,228,.1);transform:translateY(-2px)}
.adv-item__icon{width:52px;height:52px;min-width:52px;background:var(--pri-light);border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--pri)}
.adv-item__body{flex:1}
.adv-item__tag{display:inline-block;background:var(--pri);color:#fff;font-size:11px;font-weight:700;padding:2px 10px;border-radius:6px;margin-bottom:6px}
.adv-item__title{font-size:16px;font-weight:700;color:var(--dark);margin-bottom:4px}
.adv-item__desc{font-size:13px;color:var(--text);line-height:1.7}

/* ===== Stats Bar (eLearning: indigo bg, round stat items) ===== */
.stats-bar{background:var(--grad);padding:52px 0;color:#fff}
.stats-bar__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
@media(max-width:600px){.stats-bar__grid{grid-template-columns:repeat(2,1fr);gap:20px}}
.stats-bar__num{font-size:42px;font-weight:800;line-height:1}
.stats-bar__label{font-size:14px;opacity:.8;margin-top:6px}

/* ===== FAQ Accordion (eLearning: full-width, no side panel) ===== */
.faq-list{display:flex;flex-direction:column;gap:10px;max-width:720px;margin:36px auto 0}
.faq-item{background:#fff;border-radius:12px;box-shadow:0 2px 12px rgba(0,0,0,.04);overflow:hidden;border:1px solid #ededf5}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;padding:20px 24px;background:none;border:none;cursor:pointer;font-size:15px;font-weight:600;color:var(--dark);text-align:left;gap:12px}
.faq-q svg{flex-shrink:0;color:var(--pri);transition:transform .3s}
.faq-item.open .faq-q{color:var(--pri)}
.faq-item.open .faq-q svg{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{padding:0 24px 20px;font-size:14px;color:var(--text);line-height:1.8}

/* ===== Newsletter CTA (eLearning: gradient card) ===== */
.nl-cta{padding:80px 0}
.nl-card{background:var(--grad);border-radius:24px;padding:56px 48px;color:#fff;text-align:center;position:relative;overflow:hidden}
.nl-card::before{content:'';position:absolute;top:-40px;right:-40px;width:200px;height:200px;background:radial-gradient(circle,rgba(255,255,255,.1),transparent 70%);border-radius:50%}
.nl-card .container{position:relative;z-index:1}
.nl-card__title{font-size:28px;font-weight:800;margin-bottom:12px}
.nl-card__desc{font-size:15px;opacity:.9;max-width:480px;margin:0 auto 28px;line-height:1.7}
.nl-card__btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.nl-card__offer{display:inline-flex;align-items:center;gap:10px;background:rgba(255,255,255,.2);padding:8px 20px;border-radius:50px;font-size:14px;font-weight:700;margin-bottom:24px;backdrop-filter:blur(4px)}
.nl-card__offer span{font-size:22px;font-weight:800}

/* ===== Footer (eLearning: dark) ===== */
.ftr{background:#191b3a;color:#9496b5;padding:48px 0 24px}
.ftr__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
@media(max-width:768px){.ftr__grid{grid-template-columns:1fr 1fr;gap:24px}}
@media(max-width:480px){.ftr__grid{grid-template-columns:1fr}}
.ftr__brand{font-size:18px;font-weight:800;color:#fff;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.ftr__brand svg{width:24px;height:24px}
.ftr__desc{font-size:13px;line-height:1.7;color:#6e7095}
.ftr__col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px}
.ftr__col ul{list-style:none}
.ftr__col li{margin-bottom:8px}
.ftr__col a{color:#6e7095;font-size:13px;transition:color .2s}
.ftr__col a:hover{color:var(--pri)}
.ftr__lang{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.ftr__lang a{display:inline-block;padding:4px 10px;font-size:12px;color:#6e7095;border:1px solid #2a2d50;border-radius:6px;transition:all .2s}
.ftr__lang a:hover,.ftr__lang a.active{color:#fff;border-color:var(--pri);background:rgba(91,95,228,.2)}
.ftr__bottom{border-top:1px solid #2a2d50;padding-top:20px;font-size:12px;color:#4e5078}
.ftr__risk{margin-bottom:8px;line-height:1.7}
.ftr__risk strong{color:#6e7095}

/* Download page */
.dl-hero{background:var(--grad);color:#fff;padding:56px 0;text-align:center;position:relative;overflow:hidden}
.dl-hero::before{content:'';position:absolute;top:-30px;right:-30px;width:150px;height:150px;border:3px solid rgba(255,255,255,.1);border-radius:50%}
.dl-hero h1{font-size:2rem;font-weight:800;margin-bottom:12px}
.dl-hero p{font-size:1rem;opacity:.9;max-width:480px;margin:0 auto}
.dl-grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.dl-card{background:#fff;border-radius:14px;padding:28px;text-align:center;box-shadow:0 2px 16px rgba(0,0,0,.05);border-top:4px solid var(--pri);transition:all .3s}
.dl-card:hover{box-shadow:0 8px 24px rgba(91,95,228,.1)}
.dl-badge{display:inline-block;color:#fff;font-size:.75rem;font-weight:700;padding:4px 14px;border-radius:20px;margin-bottom:16px;letter-spacing:1px}
.dl-card h2{font-size:1.1rem;font-weight:700;color:var(--dark);margin-bottom:14px}
.dl-card ul{list-style:none;text-align:left;margin-bottom:20px;padding:0}
.dl-card li{padding:6px 0;font-size:.88rem;color:var(--text);border-bottom:1px solid #f5f5f5}
.dl-card li:last-child{border-bottom:none}
@media(max-width:768px){.dl-grid3{grid-template-columns:1fr}}

/* Page */
.page-content{padding:48px 0 60px}
.page-content h1{font-size:28px;font-weight:800;margin-bottom:20px;color:var(--dark)}
.page-content h2{font-size:20px;font-weight:700;margin:28px 0 12px;color:var(--dark)}
.page-content p{color:var(--text);line-height:1.85;margin-bottom:14px}

/* Back to top */
.back-top{position:fixed;bottom:24px;right:24px;width:40px;height:40px;background:var(--pri);color:#fff;border:none;border-radius:50%;cursor:pointer;opacity:0;transform:translateY(10px);transition:all .3s;box-shadow:0 2px 10px rgba(91,95,228,.3);z-index:50;display:flex;align-items:center;justify-content:center}
.back-top--show{opacity:1;transform:translateY(0)}
.back-top svg{width:20px;height:20px}