/* Nine authentic seminar steps. Existing payment and chat components are retained. */
:root{--nine-ink:#123e35;--nine-teal:#08715c;--nine-paper:#faf9f5;--nine-gold:#be9141;--nine-line:#d9e4da;--nine-header-height:132px}
html{scroll-padding-top:0!important}
.one-page{background:var(--nine-paper);color:var(--nine-ink)}
.one-page main{overflow:clip}
.one-page section[id],.one-page article[id],.one-page video[id],.one-page [id^=buoc-]{scroll-margin-top:calc(var(--nine-header-height) + 20px)}
.one-page .wrap{max-width:1200px;padding-inline:32px}
.one-page header{display:block;height:auto;padding:0 max(24px,calc((100vw - 1136px)/2));background:#faf9f5f5;backdrop-filter:blur(16px);border-bottom:1px solid var(--nine-line);z-index:30;box-shadow:0 6px 25px #123e3505}
.nine-header-top{display:flex;align-items:center;justify-content:space-between;min-height:70px;gap:22px}
.one-page header .brand{font-size:25px;line-height:1.5;letter-spacing:-.6px;min-width:0}
.nine-header-cta{font-size:14px;font-weight:750;text-decoration:none;display:flex;align-items:center;gap:18px;color:#125847}
.nine-header-cta span{font-size:22px}
.nine-toc{display:flex;align-items:center;gap:22px;position:relative;border-top:1px solid var(--nine-line);min-height:62px}
.nine-toc-label{font-size:13px;font-weight:800;white-space:nowrap;line-height:1.5}
.nine-toc-label small{display:block;font-size:10px;font-weight:500;color:#597268}
.one-page header nav#nine-toc-rail{display:flex;flex:1;min-width:0;overflow-x:auto;gap:8px;padding:9px 4px;scrollbar-width:thin;scrollbar-color:#bdd1c3 transparent;overscroll-behavior-x:contain;scroll-behavior:smooth;touch-action:pan-x pan-y;-webkit-overflow-scrolling:touch;mask-image:linear-gradient(90deg,#000 96%,transparent)}
#nine-toc-rail a{white-space:nowrap;font-size:13px;font-weight:650;min-height:38px;display:flex;align-items:center;padding:7px 12px;border-radius:6px;color:#3d6154;border:1px solid transparent;text-decoration:none}
#nine-toc-rail a:hover{background:#e9f0e8;color:#124f40}
#nine-toc-rail a[aria-current=true]{background:#0c5544;color:#fff;border-color:#0c5544}
.nine-toc-next{display:grid;place-items:center;width:36px;height:40px;flex:none;border:1px solid var(--nine-line);border-radius:7px;background:#fff;color:#145543;font-size:21px;touch-action:manipulation}
.nine-reading-progress{position:absolute;bottom:-2px;left:0;width:100%;height:2px;pointer-events:none}
.nine-reading-progress i{display:block;width:0;height:100%;background:#b28a3e}
.reading-progress{display:none!important}
.nine-hero{padding:68px 0 0;border-bottom:1px solid var(--nine-line);background:#f7f6f0}
.nine-hero-inner{display:grid;grid-template-columns:1.3fr 1fr;gap:64px;align-items:center}
.nine-hero-copy{padding-bottom:28px}
.one-page .nine-hero h1{font-size:clamp(46px,5.1vw,72px);line-height:1.13;letter-spacing:-2.3px;font-weight:800;margin:0 0 22px;text-align:left;color:#123e35}
.nine-hero h1 em{color:#137e60;font-style:normal;position:relative;display:inline-block}
.nine-hero h1 em:after{content:'';height:5px;border-radius:50%;position:absolute;bottom:-8px;left:0;right:-12px;background:#ceb165;transform:rotate(-2deg);transform-origin:left}
.nine-hero-copy>p{max-width:600px;font-size:18px;line-height:1.8;color:#435f52}
.nine-hero-copy .nine-hero-subtitle{font-size:23px;font-weight:650;color:#204d3e;margin:28px 0 20px}
.nine-hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:22px;margin-top:30px}
.nine-hero .primary{font-size:17px;background:#0c624e;color:#fff;min-height:56px;border-radius:8px;box-shadow:0 6px 17px #0c624e18}
.nine-hero .primary:hover{background:#094b3c}
.nine-text-link{display:inline-flex;align-items:center;gap:12px;font-size:16px;font-weight:750;line-height:1.6;text-decoration:none;color:#08664f;min-height:44px;touch-action:manipulation}
.nine-text-link:hover{text-decoration:underline;text-underline-offset:5px}
.nine-hero-portrait{margin:0;position:relative;align-self:end}
.nine-hero-portrait img{display:block;width:100%;height:auto;border-radius:50% 50% 8px 8px;object-fit:cover;object-position:top;border:1px solid #e0e5dc}
.nine-hero-portrait figcaption{position:absolute;left:-20px;right:28px;bottom:20px;background:#0b4439;color:#fff;border-radius:9px;padding:20px 25px;box-shadow:0 10px 28px #103e3326;border-left:3px solid #d3b164}
.nine-hero-portrait figcaption strong{display:block;font-size:21px;margin-bottom:5px}
.nine-hero-portrait figcaption span{font-size:14px;line-height:1.65;color:#e1eee4}
.nine-hero-route{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-block:30px;margin-top:50px;border-top:1px solid #d8e0d5;font-size:13px;font-weight:750;color:#486356}
.nine-hero-route i{width:8%;height:1px;background:#b4c7b9;position:relative}
.nine-hero-route i:after{content:'';position:absolute;right:0;top:-2px;width:5px;height:5px;background:#ba9348;border-radius:50%}
.one-page .reading{padding-top:88px;padding-bottom:88px}
.one-page h2{font-size:clamp(30px,3.2vw,43px);line-height:1.3;letter-spacing:-1.15px;max-width:950px;margin-bottom:26px}
.one-page h2 em{font-style:normal;color:#507261}
.one-page p{font-size:18px;line-height:1.85}
.nine-section-lead{max-width:840px;color:#486354;font-size:20px!important}
.nine-needs{display:grid;grid-template-columns:1fr 1fr;gap:0 48px;margin-top:40px}
.nine-need{border-top:1px solid #c6d9c9;padding:30px 0 34px;min-width:0}
.nine-need svg{color:#0a7057;margin-bottom:18px}
.nine-need h3{font-size:27px;line-height:1.4;color:#123e35;margin:0 0 15px}
.nine-need p{color:#50695c;margin-bottom:14px}
.nine-need .nine-need-way{font-weight:600;color:#294e3b}
.nine-belief{font-size:26px;line-height:1.65;margin:36px 0;padding:28px 0 28px 28px;border-left:3px solid #bd9442;color:#355542}
.nine-belief strong{color:#134b3b;font-weight:750}
#thay-vinh-la-ai{border-top:1px solid #d4dfd2}
.one-page .teacher-profile-layout{gap:42px;grid-template-columns:1fr 1.15fr}
.one-page .profile-milestones{margin:24px 0}
.one-page .profile-milestones span{font-size:16px;line-height:1.7}
.one-page .profile-milestones strong{font-size:20px}
.one-page .profile-evidence{gap:20px;margin-top:24px}
.one-page .profile-evidence button{box-shadow:0 8px 22px #133d3308;border:1px solid #d4dfd3;border-radius:10px}
.one-page .profile-evidence figcaption{font-size:14px;line-height:1.65}
#cau-chuyen-hoc-tro{border-top:1px solid var(--nine-line)}
.one-page #cau-chuyen-hoc-tro .main-player{max-width:860px;margin:28px auto}
.one-page .feedback{padding-block:70px;background:#edf3eb;border-block:1px solid #d9e5d6}
.one-page .nine-personal-story{border-top:1px solid #d1dfd0}
.nine-story-layout{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center;margin-top:30px}
.nine-story-note h3{font-size:26px;line-height:1.45;margin:0 0 18px}
.nine-story-note .primary{margin-top:24px;min-height:54px;font-size:17px}
#bi-quyet{border-top:1px solid #d4dfd0;padding-bottom:40px}
.nine-overview{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin:42px 0 30px;border-top:1px solid #ccdcd0}
.nine-overview a{display:flex;align-items:center;gap:17px;padding:24px 18px 24px 0;min-height:95px;border-bottom:1px solid #ccdcd0;text-decoration:none;color:#1b4d3d;transition:background .2s}
.nine-overview a:nth-child(3n+2),.nine-overview a:nth-child(3n){padding-left:20px}
.nine-overview a:hover{background:#eaf2e7}
.nine-overview span{font-size:24px;color:#9b7938;font-weight:600;line-height:1}
.nine-overview strong{font-size:16px;line-height:1.6;flex:1}
.nine-overview i{font-style:normal;font-size:19px;padding-right:10px;color:#6c8f78}
.nine-overview-note{max-width:820px;color:#536b5c}
.one-page .nine-step{position:relative;padding-top:76px;padding-bottom:76px;border-bottom:1px solid #cdddcf}
.nine-step-heading{display:flex;gap:26px;align-items:flex-start;margin-bottom:28px}
.nine-step-number{font-size:60px;line-height:1;font-weight:500;letter-spacing:-3px;color:#b49351;flex:none;min-width:75px;margin-top:5px}
.nine-step-heading h2{margin:7px 0 0;max-width:860px}
.one-page .nine-step-label{font-size:11px!important;font-weight:800;letter-spacing:1.25px;color:#56795f;margin:0;line-height:1.5!important}
.nine-step-layout{display:grid;grid-template-columns:1fr 1.28fr;gap:40px;align-items:start;margin-top:32px}
.nine-step-copy h3{font-size:23px;line-height:1.5;letter-spacing:-.5px;margin:0 0 17px;color:#194e3c}
.nine-step-copy p{color:#526859}
.nine-principles{list-style:none;padding:0;margin:26px 0 0}
.nine-principles li{font-size:16px;line-height:1.8;padding:12px 0 12px 26px;border-top:1px solid #dde6d9;position:relative;color:#284d3a}
.nine-principles li:before{content:'';position:absolute;top:23px;left:1px;width:7px;height:7px;background:#b79245;border-radius:50%}
.nine-step-film{margin:0;min-width:0;position:sticky;top:calc(var(--nine-header-height) + 20px)}
.one-page .nine-step-film .main-player{max-width:none;border-radius:12px;border-color:#9ab2a0;box-shadow:0 15px 35px #103e3310}
.nine-step-film figcaption{font-size:13px;line-height:1.8;color:#58705f;display:flex;justify-content:space-between;gap:12px;margin-top:13px}
.nine-step-film figcaption span{font-size:11px;white-space:nowrap}
.nine-try{display:flex;gap:20px;align-items:flex-start;background:#eaf1e5;border-left:3px solid #b9974e;padding:22px 28px;margin-top:32px;border-radius:0 12px 12px 0}
.nine-try>span{color:#9b7831;font-size:33px;line-height:1.2}
.nine-try strong{font-size:14px;font-weight:800;color:#29543c}
.one-page .nine-try p{font-size:16px;line-height:1.8;margin:6px 0 0;color:#3b5e46}
.one-page .nine-step-transition{font-size:16px;margin:23px 0 0;max-width:900px;color:#60735f}
.nine-step .nine-text-link{margin-top:7px;font-size:14px}
.one-page #chuong-trinh{padding-top:90px}
.nine-program-map{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;width:100%;grid-column:1/-1;margin-top:32px;background:#124b3c;border-radius:12px;color:#fff;overflow:hidden}
.nine-program-map div{padding:24px;border-right:1px solid #36634d}
.nine-program-map strong{display:block;font-size:16px;line-height:1.65;color:#fff}
.nine-program-map span{font-size:12px;color:#c2d7c4}
.nine-reveal{opacity:1}
@media(prefers-reduced-motion:no-preference){.nine-hero h1 em:after{animation:nine-underline 1s ease-out both}.nine-hero-route i:after{animation:nine-travel 5s ease-in-out infinite}.nine-hero-route i:nth-of-type(2):after{animation-delay:1s}.nine-hero-route i:nth-of-type(3):after{animation-delay:2s}.nine-text-link span,.nine-header-cta span{transition:translate .2s}.nine-text-link:hover span,.nine-header-cta:hover span{translate:4px 0}.nine-hero .primary{animation:nine-invite 5s ease-in-out 3s infinite}}
@keyframes nine-underline{from{scale:0 1}to{scale:1 1}}
@keyframes nine-travel{0%,100%{translate:-40px 0;opacity:.3}50%{translate:0 0;opacity:1}}
@keyframes nine-invite{0%,84%,100%{box-shadow:0 6px 17px #0c624e18}92%{box-shadow:0 0 0 7px #0c624e12}}
@media(max-width:900px){.nine-hero-inner{gap:32px;grid-template-columns:1.2fr 1fr}.one-page .nine-hero h1{font-size:55px}.nine-hero-portrait figcaption{left:-12px;right:15px;padding:16px}.nine-hero-copy>p{font-size:17px}.one-page .teacher-profile-layout{grid-template-columns:1fr}.nine-step-layout{grid-template-columns:1fr 1.12fr;gap:28px}.nine-story-layout{grid-template-columns:1fr}.nine-program-map{grid-template-columns:1fr 1fr}}
@media(max-width:700px){
 .one-page .wrap{padding-inline:22px}.one-page header{padding:0 18px}.nine-header-top{min-height:59px;gap:12px}.one-page header .brand{font-size:21px;letter-spacing:-.6px}.nine-header-cta{font-size:11px;gap:5px;max-width:125px;line-height:1.5}.nine-header-cta span{font-size:17px}.nine-toc{gap:10px;min-height:57px}.nine-toc-label{font-size:11px;min-width:53px}.nine-toc-label small{font-size:8px;max-width:52px;white-space:normal}.one-page header nav#nine-toc-rail{gap:3px;padding-block:7px}#nine-toc-rail a{font-size:12px;padding:8px 10px;min-height:40px}.nine-toc-next{width:27px;height:38px;font-size:18px}
 .nine-hero{padding-top:36px}.nine-hero-inner{grid-template-columns:1fr;gap:24px}.one-page .nine-hero h1{font-size:45px;line-height:1.14;letter-spacing:-1.9px;margin-bottom:24px}.nine-hero-copy{padding-bottom:0}.nine-hero-copy .nine-hero-subtitle{font-size:20px;line-height:1.6;margin-top:27px}.nine-hero-copy>p{font-size:16px;line-height:1.9}.nine-hero-actions{gap:10px;margin-top:25px}.nine-hero .primary{font-size:16px;width:100%;min-height:55px}.nine-hero-actions .nine-text-link{justify-content:center;width:100%;font-size:14px}.nine-hero-portrait{max-width:295px;width:100%;margin:0 auto}.nine-hero-portrait img{max-height:300px;object-fit:cover;object-position:top}.nine-hero-portrait figcaption{left:-12px;right:-12px;bottom:10px;padding:15px 18px}.nine-hero-portrait figcaption strong{font-size:17px}.nine-hero-portrait figcaption span{font-size:12px}.nine-hero-route{gap:8px;padding-block:23px;margin-top:30px;font-size:10px;line-height:1.5}.nine-hero-route i{width:5%;flex:none}
 .one-page .reading{padding-top:55px;padding-bottom:55px}.one-page h2{font-size:30px;line-height:1.35;letter-spacing:-.8px;margin-bottom:24px}.one-page h2 br{display:none}.one-page p{font-size:17px;line-height:1.85}.nine-section-lead{font-size:18px!important}.nine-needs{grid-template-columns:1fr;gap:0;margin-top:30px}.nine-need{padding:26px 0}.nine-need svg{width:33px;height:33px;margin-bottom:12px}.nine-need h3{font-size:24px}.nine-need p{font-size:17px}.nine-text-link{font-size:15px}.nine-belief{font-size:21px;padding:20px 0 20px 19px;margin:26px 0}.nine-belief br{display:none}.one-page .profile-milestones span{font-size:16px}.one-page .profile-evidence{grid-template-columns:1fr 1fr;gap:22px 14px}.one-page .profile-evidence figure{grid-column:span 1}.one-page .profile-evidence figure:last-child{grid-column:1/-1;max-width:none}.one-page .profile-evidence figcaption{font-size:12px}.one-page .profile-evidence button span{font-size:11px;padding:8px}.one-page .feedback{padding-block:48px}.nine-story-layout{gap:25px}.nine-story-note h3{font-size:23px}.nine-overview{grid-template-columns:1fr;margin-top:28px}.nine-overview a,.nine-overview a:nth-child(3n+2),.nine-overview a:nth-child(3n){padding:16px 0;min-height:68px}.nine-overview span{font-size:25px;min-width:42px}.nine-overview strong{font-size:16px}.nine-overview-note{font-size:16px!important}
 .one-page .nine-step{padding-top:47px;padding-bottom:47px}.nine-step-heading{gap:14px;margin-bottom:22px}.nine-step-number{font-size:43px;min-width:50px;letter-spacing:-2px;margin-top:5px}.nine-step-heading h2{font-size:27px;line-height:1.4;margin-top:8px;letter-spacing:-.7px}.one-page .nine-step-label{font-size:9px!important;letter-spacing:.7px}.nine-step-layout{grid-template-columns:1fr;gap:25px;margin-top:22px}.nine-step-copy h3{font-size:21px;line-height:1.5}.nine-step-copy p{font-size:17px}.nine-principles{margin-top:21px}.nine-principles li{font-size:16px;padding-block:11px}.nine-step-film{position:static}.nine-step-film figcaption{font-size:11px;gap:7px}.nine-step-film figcaption span{font-size:9px}.nine-try{padding:20px 18px;gap:12px;margin-top:24px}.nine-try>span{font-size:27px}.one-page .nine-try p{font-size:16px}.one-page .nine-step-transition{font-size:15px}.nine-program-map{grid-template-columns:1fr 1fr;gap:0;margin-top:20px}.nine-program-map div{padding:19px 16px;border-bottom:1px solid #36634d}.nine-program-map strong{font-size:14px}.nine-program-map span{font-size:11px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.nine-hero *{animation:none!important}#nine-toc-rail{scroll-behavior:auto!important}}
/* Keep the mobile invitation clear of the inline lesson links and fixed enrollment CTA. */
@media(max-width:700px){.one-page .nine-hero h1{font-size:40px}.one-page .tv-mobile-chat-toggle{width:56px;height:56px;max-width:56px;padding:6px;right:18px;bottom:calc(92px + env(safe-area-inset-bottom));justify-content:center}.one-page .tv-mobile-chat-toggle .tv-chat-label{display:none}.one-page .tv-mobile-chat-toggle .tv-chat-portrait{width:40px;height:40px;flex:none}}