body.tutorial-page{padding-top:64px}.tutorial-hero{position:relative;overflow:hidden;background-image:url(/images/tutorial/banner.webp);background-size:cover;background-position:center;padding:32px 0 28px}@media (max-width:768px){.tutorial-hero{background-image:none;background:radial-gradient(ellipse at 80% 10%,rgba(75,150,255,.25)0,rgba(148,191,255,.12) 30%,transparent 60%),radial-gradient(ellipse at 20% 50%,rgba(75,150,255,.15)0,rgba(148,191,255,.08) 30%,transparent 55%),linear-gradient(180deg,#eaf0fa 0,#f0f4fb 40%,#fff 100%)}}.tutorial-hero-inner{position:relative;z-index:1;text-align:center;max-width:640px;margin:0 auto}.tutorial-hero-title{font-size:clamp(26px,4vw,34px);font-weight:700;color:var(--text-primary);letter-spacing:-.02em;margin-bottom:10px;line-height:1.25}.tutorial-hero-desc{font-size:15px;color:var(--text-tertiary);line-height:1.65}.tutorial-featured{position:relative;z-index:2;margin-top:32px;padding-bottom:24px}.featured-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.featured-video-card-small{display:flex;flex-direction:column;background:rgba(255,255,255,.8);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.9);border-radius:24px;padding:8px;overflow:hidden;cursor:pointer;transition:all .4s cubic-bezier(.4,0,.2,1);box-shadow:0 8px 30px rgba(0,0,0,.04),inset 0 1px 0#fff}.featured-video-card-small:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(37,99,235,.08),inset 0 1px 0#fff;background:rgba(255,255,255,.95);border-color:rgba(37,99,235,.15)}.featured-card-heading{font-size:15px;font-weight:600;color:var(--text-secondary);text-align:center;margin:0 0 2px;padding:10px 12px 0;line-height:1.3}.featured-video-player-small{aspect-ratio:16/9;border-radius:18px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(255,255,255,.1)}.featured-video-player-small::before{content:"";position:absolute;inset:0}.video-placeholder-large{width:34px;height:34px;position:absolute;bottom:10px;right:10px;transition:transform .4s cubic-bezier(.4,0,.2,1),background .4s}.featured-video-card-small:hover .video-placeholder-large{transform:scale(1.15)}.featured-video-info-small{padding:10px;display:flex;flex-direction:column;align-items:center;justify-content:center}@media (max-width:768px){.featured-video-info-small{order:2}.featured-video-player-small{order:1}.video-placeholder-large{width:20px;height:20px;right:5px;bottom:5px}}.featured-badge{display:inline-flex;align-items:center;align-self:flex-start;background:rgba(239,68,68,.08);color:#ef4444;padding:4px 10px;border-radius:8px;font-size:12px;font-weight:600;margin-bottom:10px;border:1px solid rgba(239,68,68,.15)}.featured-title-small{font-size:16px;font-weight:700;color:#4b5563;line-height:1.3;margin:0}@media (max-width:768px){.featured-grid{grid-template-columns:1fr;gap:16px}.featured-video-card-small{flex-direction:row;align-items:center;padding:8px;border-radius:16px;box-shadow:0 6px 18px rgba(64,158,254,.15)}.featured-video-player-small{width:176px;height:99px;flex-shrink:0;border-radius:12px;aspect-ratio:auto}.featured-video-info-small{padding:8px 12px;flex:1}.featured-badge{font-size:11px;padding:3px 8px;margin-bottom:6px}.featured-title-small{font-size:14px;font-weight:700;color:#111827}}.tutorial-tabs-wrap{position:sticky;top:64px;z-index:800;background:#fcfdff;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid #f3f4f6;margin-bottom:0}.tutorial-tabs{display:flex;gap:8px;padding:0;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;scroll-snap-type:x proximity}.tutorial-tabs::-webkit-scrollbar{display:none}.tutorial-tab{flex:0 0 auto;scroll-snap-align:start;padding:27px 16px 21px;border-radius:0;font-size:14px;font-weight:500;color:#4b5563;background:0 0;border:0;border-bottom:2px solid transparent;transition:color .2s,border-color .2s;white-space:nowrap;cursor:pointer}.tutorial-tab:hover{color:var(--primary)}.tutorial-tab.active{color:var(--primary);font-weight:700;position:relative}.tutorial-tab.active::after{content:"";position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);width:24px;height:4px;background-color:var(--primary, #3a78ff);border-radius:2px}.tutorial-main{padding:16px 0 64px;background:var(--bg-secondary)}.tutorial-grid{display:grid;grid-template-columns:1fr;gap:16px}@media (min-width:640px){.tutorial-grid{grid-template-columns:repeat(2,1fr);gap:20px}}@media (min-width:1024px){.tutorial-grid{grid-template-columns:repeat(3,1fr)}}.tutorial-list-card{background:var(--bg-primary);border-radius:var(--radius-lg);border:1px solid rgba(0,0,0,.06);box-shadow:0 4px 20px rgba(15,23,42,.06),inset 0 1px 0 rgba(255,255,255,.92);transition:border-color .2s,box-shadow .25s var(--ease-out),transform .25s var(--ease-out);cursor:pointer}.tutorial-list-card:hover{border-color:rgba(37,99,235,.2);box-shadow:0 12px 36px rgba(15,23,42,.1),0 4px 12px rgba(37,99,235,.06),inset 0 1px 0#fff;transform:translateY(-2px)}.tutorial-list-card:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.tutorial-list-card.hidden{display:none}.tutorial-card-header{padding:20px;text-align:left;display:flex;flex-direction:column;gap:12px;width:100%;font-family:inherit;color:inherit}.tutorial-card-meta{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.tutorial-badge-cat{display:inline-flex;align-items:center;padding:4px 10px;border-radius:var(--radius-sm);font-size:12px;font-weight:600;gap:5.15px}.tcat-beginner{background:#6b9fdc1a;color:#6b9fdc}.tcat-account::before,.tcat-anti-fraud::before,.tcat-beginner::before,.tcat-buy::before,.tcat-payment::before,.tcat-recharge::before,.tcat-sell::before{content:"";display:inline-block;width:16px;height:16px;background-image:url(/images/tutorial/tcat-beginner.webp);background-size:contain;background-repeat:no-repeat;background-position:center;flex-shrink:0}.tcat-payment{background:#5a9e6f1a;color:#5a9e6f}.tcat-account::before,.tcat-anti-fraud::before,.tcat-buy::before,.tcat-payment::before,.tcat-recharge::before,.tcat-sell::before{background-image:url(/images/tutorial/tcat-payment.webp)}.tcat-buy{background:#8b6bbf1a;color:#8b6bbf}.tcat-account::before,.tcat-anti-fraud::before,.tcat-buy::before,.tcat-recharge::before,.tcat-sell::before{background-image:url(/images/tutorial/tcat-buy.webp)}.tcat-sell{background:#b8883a1a;color:#b8883a}.tcat-account::before,.tcat-anti-fraud::before,.tcat-recharge::before,.tcat-sell::before{background-image:url(/images/tutorial/tcat-sell.webp)}.tcat-recharge{background:#79bfb91a;color:#5a9e97}.tcat-account::before,.tcat-anti-fraud::before,.tcat-recharge::before{background-image:url(/images/tutorial/tcat-recharge.webp)}.tcat-account{background:#747b871a;color:#747b87}.tcat-account::before,.tcat-anti-fraud::before{background-image:url(/images/tutorial/tcat-account.webp)}.tcat-anti-fraud{background:#c75c5c1a;color:#c75c5c}.tcat-anti-fraud::before{background-image:url(/images/tutorial/tcat-anti-fraud.webp)}.tutorial-type-badges{display:flex;gap:6px;flex-wrap:wrap}.tutorial-type-badge{font-size:11px;font-weight:600;padding:3px 8px;border-radius:var(--radius-sm);background:var(--gray-100);color:var(--text-tertiary)}.tutorial-type-badge.video{background:#fef3c7;color:#b45309}.tutorial-card-title{font-size:17px;font-weight:700;color:var(--text-primary);line-height:1.35;margin:0}.tutorial-card-desc{font-size:14px;color:var(--text-tertiary);line-height:1.5;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;margin:0;flex:1}.tutorial-card-footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--gray-100);margin-top:auto;padding:12px 20px}.back-to-top,.tutorial-card-arrow{color:var(--primary);align-items:center}.tutorial-card-arrow{display:inline-flex;gap:4px;font-size:14px;font-weight:600}.tutorial-card-arrow svg{width:16px;height:16px}.back-to-top{position:fixed;bottom:96px;right:24px;z-index:890;width:44px;height:44px;border-radius:50%;background:var(--bg-primary);border:1px solid rgba(0,0,0,.06);box-shadow:0 8px 24px rgba(15,23,42,.1),inset 0 1px 0 rgba(255,255,255,.95);display:flex;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .25s,visibility .25s,transform .25s var(--ease-out),border-color .2s}.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}.back-to-top:hover{border-color:var(--primary-light);box-shadow:0 12px 32px rgba(37,99,235,.18),inset 0 1px 0#fff}@media (max-width:480px){.back-to-top{right:16px;bottom:88px}}.tutorial-modal-overlay{position:fixed;inset:0;z-index:1100;background:rgba(17,24,39,.55);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s;display:flex;align-items:flex-end;justify-content:center;padding:0}.tutorial-modal-overlay.open{opacity:1;visibility:visible}.tutorial-modal{background:var(--bg-primary);border-radius:var(--radius-2xl) var(--radius-2xl)0 0;width:100%;max-width:720px;max-height:min(92vh,900px);overflow:hidden;display:flex;flex-direction:column;border:1px solid rgba(0,0,0,.06);box-shadow:0 24px 48px rgba(15,23,42,.18),inset 0 1px 0 rgba(255,255,255,.9);transform:translateY(100%);transition:transform .35s var(--ease-out)}.tutorial-modal-overlay.open .tutorial-modal{transform:translateY(0)}@media (min-width:768px){.tutorial-modal-overlay{align-items:center;padding:24px}.tutorial-modal{border-radius:var(--radius-xl);max-height:min(88vh,820px)}}.tutorial-modal-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:20px 20px 16px;border-bottom:1px solid var(--gray-100);flex-shrink:0}.tutorial-modal-title-wrap{min-width:0}.tutorial-modal-cat{display:inline-block;font-size:12px;font-weight:600;color:var(--primary);margin-bottom:6px}.tutorial-modal-title{font-size:20px;font-weight:700;line-height:1.3;color:var(--text-primary);margin:0}.tutorial-modal-close{flex-shrink:0;width:40px;height:40px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:var(--text-tertiary);transition:background .2s,color .2s}.tutorial-modal-close:hover{background:var(--gray-100);color:var(--text-primary)}.tutorial-modal-body{overflow-y:auto;padding:20px;flex:1;-webkit-overflow-scrolling:touch}.tutorial-step-indicator{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:8px}.tutorial-step-label{font-size:14px;font-weight:600;color:var(--primary)}.tutorial-step-dots{display:flex;gap:6px;flex-wrap:wrap}.tutorial-step-dot{width:8px;height:8px;border-radius:50%;background:var(--gray-200);transition:background .2s,transform .2s}.tutorial-step-dot.active{background:var(--primary);transform:scale(1.15)}.tutorial-section-tabs{display:flex;gap:0;margin-bottom:16px;border-radius:10px;background:var(--gray-100);padding:3px}.tutorial-section-tab{flex:1;padding:8px 16px;border:0;background:0 0;font-size:14px;font-weight:600;color:var(--text-secondary);border-radius:8px;cursor:pointer;transition:all .2s}.tutorial-section-tab.active{background:#fff;color:var(--primary);box-shadow:0 1px 3px rgba(0,0,0,.1)}.tutorial-section-tab:hover:not(.active){color:var(--text-primary)}.tutorial-step-screenshot{border-radius:var(--radius-md);margin-bottom:14px;overflow:hidden}.tutorial-screenshot-placeholder{aspect-ratio:9/14;max-height:340px;background:var(--gray-100);border-radius:var(--radius-md);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;border:1.5px dashed var(--gray-300)}.tutorial-screenshot-placeholder span{font-size:14px;font-weight:600;color:var(--gray-400)}.tutorial-step-text{font-size:15px;line-height:1.65;color:var(--text-secondary);margin-bottom:12px}.tutorial-step-tip{display:flex;align-items:flex-start;gap:8px;padding:10px 14px;background:#eff6ff;border-radius:8px;margin-bottom:16px;font-size:13px;line-height:1.5;color:#2563eb}.tutorial-step-tip svg{flex-shrink:0;margin-top:1px}.tutorial-video-placeholder{border-radius:var(--radius-md);background:linear-gradient(135deg,var(--gray-800) 0%,var(--gray-700) 100%);aspect-ratio:16/9;max-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:rgba(255,255,255,.85);margin-top:8px}.tutorial-video-placeholder svg{opacity:.9}.tutorial-video-placeholder p{font-size:13px;font-weight:500;margin:0}.tutorial-modal-nav{display:flex;gap:12px;padding:16px 20px 20px;border-top:1px solid var(--gray-100);background:var(--bg-primary);flex-shrink:0}.tutorial-modal-nav .btn-primary,.tutorial-modal-nav .btn-secondary{flex:1;justify-content:center}.tutorial-modal-nav .btn-primary:disabled,.tutorial-modal-nav .btn-secondary:disabled{opacity:.45;pointer-events:none;transform:none}.tutorial-related{margin-top:24px;padding-top:20px;border-top:1px solid var(--gray-100)}.tutorial-related h3{font-size:15px;font-weight:700;color:var(--text-primary);margin-bottom:12px}.tutorial-related-list{display:flex;flex-direction:column;gap:8px}.tutorial-related-link{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-radius:var(--radius-md);background:var(--gray-50);font-size:14px;font-weight:500;color:var(--text-secondary);transition:background .2s,color .2s;border:1px solid transparent;width:100%;text-align:left;font-family:inherit;cursor:pointer}.tutorial-related-link:hover{background:var(--primary-bg);color:var(--primary);border-color:rgba(37,99,235,.15)}body.modal-open{overflow:hidden}@media (max-width:480px){.tutorial-tabs{margin:0-8px;padding-left:8px;padding-right:8px;gap:4px}.tutorial-tab{padding:10px 12px;font-size:13px}}.tutorial-detail-page{padding:24px 0 60px;min-height:60vh}.td-breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-tertiary);margin-bottom:24px}.td-breadcrumb a{color:var(--primary);text-decoration:none}.td-breadcrumb a:hover{text-decoration:underline}.td-breadcrumb svg{flex-shrink:0}.td-header{margin-bottom:32px}.td-header .tutorial-badge-cat{margin-bottom:12px}.td-title{font-size:28px;font-weight:700;color:var(--text-primary);margin-top:12px;line-height:1.3}.td-section-tabs{display:flex;gap:0;margin-bottom:32px;border-radius:12px;background:var(--gray-100);padding:4px;max-width:320px}.td-section-tab{flex:1;padding:10px 20px;border:0;background:0 0;font-size:15px;font-weight:600;color:var(--text-secondary);border-radius:10px;cursor:pointer;transition:all .2s}.td-section-tab.active{background:#fff;color:var(--primary);box-shadow:0 1px 4px rgba(0,0,0,.1)}.td-steps{display:flex;flex-direction:column;gap:0}.td-step{display:flex;gap:20px;position:relative;padding-bottom:32px}.td-step:last-child{padding-bottom:0}.td-step:not(:last-child)::before{content:"";position:absolute;left:19px;top:40px;bottom:0;width:2px;background:var(--gray-200)}.td-step-number{width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;flex-shrink:0;position:relative;z-index:1}.td-step-content{flex:1;min-width:0}.td-step-text{font-size:16px;line-height:1.7;color:var(--text-primary);margin-bottom:12px;font-weight:500}.td-step-tip{display:flex;align-items:flex-start;gap:8px;padding:10px 14px;background:#eff6ff;border-radius:8px;margin-bottom:12px;font-size:13px;line-height:1.5;color:#2563eb}.td-step-tip svg{flex-shrink:0;margin-top:2px}.td-screenshot-placeholder{aspect-ratio:9/12;max-width:280px;background:var(--gray-100);border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;border:1.5px dashed var(--gray-300)}.td-screenshot-placeholder span{font-size:13px;font-weight:600;color:var(--gray-400)}.td-video{margin-top:48px;padding-top:32px;border-top:1px solid var(--gray-200)}.td-related h2,.td-video h2{font-size:20px;font-weight:700;margin-bottom:16px;color:var(--text-primary)}.td-video-placeholder{border-radius:16px;background:linear-gradient(135deg,var(--gray-800) 0%,var(--gray-700) 100%);aspect-ratio:16/9;max-height:320px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;color:rgba(255,255,255,.85)}.td-related{margin-top:48px;padding-top:32px;border-top:1px solid var(--gray-200)}.td-related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}.td-related-card{display:block;padding:16px 20px;background:var(--gray-50);border-radius:12px;border:1px solid var(--gray-200);text-decoration:none;color:var(--text-primary);font-weight:600;font-size:15px;transition:all .2s}.td-related-card:hover{background:#fff;border-color:var(--primary);color:var(--primary);box-shadow:0 2px 8px rgba(58,120,255,.1)}@media (max-width:768px){.td-title{font-size:22px}.td-step{gap:14px}.td-step-number{width:32px;height:32px;font-size:14px}.td-step:not(:last-child)::before{left:15px;top:34px}.td-step-text{font-size:15px}.td-screenshot-placeholder,.td-section-tabs{max-width:100%}}

/* Screenshot improvements */
.td-step-screenshot {
  display: flex;
  justify-content: center;
  margin-top: 16px;
}

.td-step-screenshot img {
  max-width: 320px;
  width: 100%;
  border-radius: 16px;
  border: 1px solid #e5e7eb;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.td-screenshot-placeholder {
  max-width: 320px;
  width: 100%;
  margin: 0 auto;
}

/* Prev/Next navigation */
.td-nav-pager {
  display: flex;
  gap: 16px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid #e5e7eb;
}

.td-nav-link {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px;
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

.td-nav-link:hover {
  background: #f0f6ff;
  border-color: #3a78ff;
}

.td-nav-link--next {
  text-align: right;
}

.td-nav-label {
  font-size: 12px;
  color: #9ca3af;
  font-weight: 500;
}

.td-nav-title {
  font-size: 15px;
  font-weight: 600;
  color: #354465;
}

@media screen and (max-width: 600px) {
  .td-nav-pager {
    flex-direction: column;
    gap: 12px;
  }
  .td-nav-link--next {
    text-align: left;
  }
}

/* Tutorial search */
.tutorial-search-wrap {
  padding: 0 0 16px;
}

.tutorial-search {
  position: relative;
  max-width: 480px;
  margin: 0 auto;
}

.tutorial-search-input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  border: 1px solid #e0e7ff;
  border-radius: 12px;
  font-size: 15px;
  color: #354465;
  background: #f8fafc;
  transition: all 0.2s ease;
  outline: none;
  font-family: inherit;
  box-sizing: border-box;
}

.tutorial-search-input:focus {
  border-color: #3a78ff;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(58, 120, 255, 0.1);
}

.tutorial-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: #9ca3af;
  pointer-events: none;
}

.tutorial-no-result {
  text-align: center;
  padding: 48px 20px;
  color: #9ca3af;
  font-size: 15px;
}

/* Video section - hide when no real video */
.td-video-coming-soon {
  text-align: center;
  padding: 32px;
  background: #f8fafc;
  border-radius: 16px;
  border: 1px dashed #e0e7ff;
  color: #9ca3af;
  font-size: 14px;
}

.td-video-coming-soon svg {
  display: block;
  margin: 0 auto 12px;
  opacity: 0.5;
}