    /* =========================================
       1. BASE & VARIABLES
    ========================================= */
    :root {
        --sticky_bar_background: #FDFBF7; 
        --app_background_color: #F5EFE6; 
        --spa_text_color: #4A3B32; 
        --spa_accent: #C1A68D; 
        --font_serif: "Times New Roman", Times, serif;
        --font_sans: Arial, Helvetica, sans-serif;

        --lvi_spinner_svg_url: url('data:image/svg+xml;charset=UTF-8,<svg version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><path fill="currentColor" d="M100-0.25c-10.458,0-18.966,8.508-18.966,18.966S89.542,37.682,100,37.682s18.966-8.508,18.966-18.966S110.458-0.25,100-0.25z M42.524,45.113c0.691,0,1.342-0.27,1.831-0.758c0.489-0.489,0.759-1.14,0.759-1.832c0-0.691-0.27-1.342-0.759-1.831c-0.489-0.489-1.139-0.759-1.831-0.759c-0.692,0-1.342,0.27-1.832,0.759c-1.009,1.009-1.009,2.652,0,3.662C41.182,44.843,41.832,45.113,42.524,45.113z M18.716,95.07c-2.718,0-4.929,2.211-4.929,4.93c0,2.718,2.211,4.929,4.929,4.929c2.718,0,4.93-2.211,4.93-4.929C23.646,97.282,21.434,95.07,18.716,95.07z M42.523,150.208c-1.941,0-3.767,0.756-5.14,2.129c-2.833,2.833-2.833,7.444,0,10.279c1.373,1.373,3.198,2.129,5.14,2.129s3.767-0.756,5.14-2.129s2.129-3.199,2.129-5.141s-0.756-3.767-2.129-5.139C46.29,150.964,44.465,150.208,42.523,150.208z M100,171.676c-5.297,0-9.607,4.31-9.607,9.607s4.31,9.607,9.607,9.607c5.298,0,9.608-4.31,9.608-9.607S105.298,171.676,100,171.676z M157.477,145.528c-3.191,0-6.191,1.243-8.448,3.5c-4.658,4.658-4.658,12.238,0,16.896c2.257,2.256,5.257,3.498,8.448,3.498s6.191-1.242,8.448-3.498c4.658-4.658,4.658-12.238,0-16.896C163.668,146.771,160.668,145.528,157.477,145.528z M181.284,85.713c-7.878,0-14.287,6.409-14.287,14.287s6.409,14.287,14.287,14.287s14.287-6.409,14.287-14.287S189.162,85.713,181.284,85.713z M157.477,59.149c4.441,0,8.616-1.729,11.757-4.869c6.482-6.483,6.482-17.031,0-23.514c-3.141-3.141-7.315-4.87-11.757-4.87s-8.616,1.729-11.757,4.87c-6.482,6.483-6.482,17.031,0,23.514C148.86,57.42,153.035,59.149,157.477,59.149z"/></svg>');
        --lvi_spinner_animation: 0.8s steps(8) infinite lvi_spinner_keyframes;
    }

    @keyframes lvi_spinner_keyframes{ 100%{ transform:rotate(360deg); } }
    @-webkit-keyframes lvi_spinner_keyframes{ 100%{ transform:rotate(360deg); } }
    
    @supports(padding:env(safe-area-inset-bottom)){
        :root{ --safe-top:env(safe-area-inset-top); --safe-right:env(safe-area-inset-right); --safe-bottom:env(safe-area-inset-bottom); --safe-left:env(safe-area-inset-left); }
    }
    @supports(padding:constant(safe-area-inset-bottom)){
        :root{ --safe-top:constant(safe-area-inset-top); --safe-right:constant(safe-area-inset-right); --safe-bottom:constant(safe-area-inset-bottom); --safe-left:constant(safe-area-inset-left); }
    }

    html { margin:0;padding:0; background:var(--sticky_bar_background); }
    body { height: 100vh; height: 100dvh; display: flex; flex-direction: column; overflow: hidden; margin: 0; padding: 0; width: 100vw; overscroll-behavior: none; }

    .wrapper { width: 1200px; max-width: 100%; margin: auto; box-sizing: border-box; }


    /* =========================================
       2. FATAL ERRORS
    ========================================= */
    .fatal_error_msg {
        position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
        background: rgba(253, 251, 247, 0.85); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
        z-index: 10000; display: flex; flex-direction: column; justify-content: center; align-items: center;
        text-align: center; padding: 25px; box-sizing: border-box;
        font-family: var(--font_sans); color: var(--spa_text_color); line-height: 1.6;
    }
    .fatal_error_msg svg { margin-bottom: 25px; animation: fatalErrorPulse 2s infinite ease-in-out; }
    .fatal_error_msg strong { font-size: 18px; font-family: var(--font_serif); letter-spacing: 1px; }
    @keyframes fatalErrorPulse { 0%, 100% { transform: scale(1); opacity: 0.8; } 50% { transform: scale(1.05); opacity: 1; } }
    #screen_size_error { display: none; }
    @media (max-width: 319.98px) { #screen_size_error { display: flex; } }


    /* =========================================
       3. CSS SPRITES
    ========================================= */
    i.sprite {
        --sprite_sheet_width: 1000; --sprite_sheet_height: 1000; --x: 0; --y: 0; --sprite_width: 1; --sprite_height: 1; --width: 1; --height: 1;
        --scale_width: var(--width) / var(--sprite_width); --scale_height: var(--height) / var(--sprite_height);
        --new_sprite_sheet_width: calc(var(--sprite_sheet_width) * var(--scale_width) * 1px); --new_sprite_sheet_height: calc(var(--sprite_sheet_height) * var(--scale_height) * 1px);
        --sprite_x: calc(var(--x) * var(--scale_width) * -1px); --sprite_y: calc(var(--y) * var(--scale_height) * -1px);
        display: inline-block;
        -webkit-mask-image: url('/static/images/sprites.webp'); mask-image: url('/static/images/sprites.webp');
        -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
        -webkit-mask-size: var(--new_sprite_sheet_width) var(--new_sprite_sheet_height); mask-size: var(--new_sprite_sheet_width) var(--new_sprite_sheet_height);
        -webkit-mask-position: var(--sprite_x) var(--sprite_y); mask-position: var(--sprite_x) var(--sprite_y);
        background: var(--icon_fill, currentColor);
        width: calc(var(--width) * 1px); height: calc(var(--height) * 1px);
    }
    i.sprite.auto_width { --width: calc(var(--height) * var(--sprite_width) / var(--sprite_height))!important; }
    i.sprite.auto_height { --height: calc(var(--width) * var(--sprite_height) / var(--sprite_width))!important; }
    
    i.sprite.logo {
        --sprite_width: 560; --sprite_height: 120; --x: 0; --y: 0; --height: 48;
        background: linear-gradient(110deg, var(--spa_text_color) 0%, var(--spa_text_color) 45%, #E8D8C8 50%, var(--spa_text_color) 55%, var(--spa_text_color) 100%);
        background-size: 400% 100%; background-position: 100% 0; animation: luxuryShimmer 8s infinite linear;
    }
    @keyframes luxuryShimmer { 0% { background-position: 100% 0; } 100% { background-position: 0% 0; } }

    i.sprite.logo.footer_logo { --width: 200; background: var(--sticky_bar_background); animation: none; }
    
    i.sprite.phone,i.sprite.facebook,i.sprite.x,i.sprite.instagram,i.sprite.youtube,i.sprite.tiktok,i.sprite.contact,i.sprite.location,i.sprite.email,i.sprite.website,i.sprite.zalo{ --sprite_width: 100; --sprite_height: 100; --height: 24;}
    
    i.sprite.phone { --x: 0; --y: 120; }
    i.sprite.facebook { --x: 100; --y: 120; }
    i.sprite.x { --x: 200; --y: 120; }
    i.sprite.instagram { --x: 300; --y: 120; }
    i.sprite.youtube { --x: 400; --y: 120; }
    i.sprite.tiktok { --x: 500; --y: 120; }
    i.sprite.contact { --x: 600; --y: 120; }
    i.sprite.location { --x: 700; --y: 120; }
    i.sprite.email { --x: 800; --y: 120; }
    i.sprite.website { --x: 900; --y: 120; }
    i.sprite.zalo { --x: 0; --y: 220; }

    /* =========================================
       4. HEADER & NAV
    ========================================= */
    #header { flex-shrink: 0; position: relative; z-index: 50; touch-action: none; background: var(--sticky_bar_background); display: flex; align-items: stretch; height: 80px; box-shadow: 0 2px 15px rgba(0,0,0,0.03); user-select: none; -webkit-user-select: none; }
    #header > .wrapper { display: flex; align-items: stretch; }
    #header > .wrapper > .content_container { flex: 1; display: flex; align-items: stretch; justify-content: space-between; }
    #header .logo_container { display: flex; align-items: center; text-decoration: none; }
    #header nav { display: flex; align-items: stretch; }
    #header nav > ul { display: flex; align-items: stretch; list-style: none; margin: 0; padding: 0; gap: 5px; }
    #header nav > ul > li { position: relative; display: flex; align-items: stretch; }
    #header nav li > * { cursor: pointer; }
    #header nav > ul > li > a { display: flex; align-items: center; padding: 0 20px; font-family: var(--font_sans); font-size: 13px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--spa_text_color); text-decoration: none; position: relative; transition: color 0.3s ease; box-sizing: border-box; }
    #header nav > ul > li:has(ul) > a { padding-right: 35px; }
    #header nav > ul > li:has(ul) > a::after { content: '+'; position: absolute; right: 15px; top: 50%; transform: translateY(-50%); font-size: 16px; font-family: var(--font_sans); font-weight: normal; transition: transform 0.4s ease, color 0.3s ease; }
    #header nav > ul > li:hover:has(ul) > a::after { transform: translateY(-50%) rotate(45deg); color: var(--spa_accent); }
    #header nav > ul > li > a::before { content: ''; position: absolute; bottom: 0px; left: 0; width: 100%; height: 3px; background-color: var(--spa_accent); transform: scaleX(0); transform-origin: center; transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94); }
    #header nav > ul > li:hover > a::before { transform: scaleX(1); }
    #header nav > ul > li:hover > a { color: var(--spa_accent); }
    #header nav > ul > li > ul { position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(15px); opacity: 0; visibility: hidden; background: var(--sticky_bar_background); min-width: 220px; box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08); border-radius: 0 0 12px 12px; border: 1px solid rgba(193, 166, 141, 0.15); border-top: none; list-style: none; padding: 10px 0; margin: 0; transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); pointer-events: none; }
    #header nav > ul > li:hover > ul { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); pointer-events: auto; }
    #header nav ul li ul li { display: block; height: auto; }
    #header nav ul li ul li a { display: flex; align-items: center; padding: 12px 25px; font-family: var(--font_sans); font-size: 14px; color: var(--spa_text_color); text-decoration: none; transition: all 0.3s ease; position: relative; box-sizing: border-box; }
    #header nav ul li ul li a:hover { background: rgba(193, 166, 141, 0.06); color: var(--spa_accent); padding: 12px 18px 12px 32px; }
    #header nav ul li > a > span, #leftside_menu ul li > a > span, #leftside_menu ul li > span > span { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    #header nav > ul > li > a > span { max-width: 140px; }
    #header nav > ul > li > ul > li > a > span { max-width: 200px; }
    #leftside_menu ul li > a > span, #leftside_menu ul li > span > span { max-width: 220px; }
    #header .icon_list { display: none; align-items: center; }
    #header .icon_list .icon { cursor: pointer; color: var(--spa_text_color); transition: transform 0.3s ease, color 0.3s ease; padding: 10px; display: flex; align-items: center; }
    #header .icon_list .icon:hover { color: var(--spa_accent); transform: scale(1.1); }
    @media (max-width: 1000px) { #header nav { display: none; } #header .icon_list { display: flex; } }


    /* =========================================
       5. LEFT SIDE MENU
    ========================================= */
    .lvi-menu-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(40, 30, 25, 0.6); backdrop-filter: blur(4px); z-index: 90; opacity: 0; visibility: hidden; transition: all 0.4s ease; }
    .lvi-menu-overlay.active { opacity: 1; visibility: visible; }
    #leftside_menu { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background: var(--sticky_bar_background); z-index: 100; box-shadow: 5px 0 30px rgba(0, 0, 0, 0.15); transition: left 0.5s cubic-bezier(0.77, 0, 0.175, 1); overflow: visible; user-select: none; -webkit-user-select: none; }
    #leftside_menu.active { left: 0; }
    #leftside_menu .wrapper { height: 100%; padding: 40px 30px; overflow-y: auto; box-sizing: border-box; }
    #leftside_menu .menu_logo_container { margin-bottom: 25px; padding-bottom: 25px; border-bottom: 1px solid rgba(193, 166, 141, 0.2); }
    .lvi-close-btn { position: absolute; top: 25px; right: -32px; width: 32px; height: 32px; background: var(--sticky_bar_background); border: none; border-radius: 0 6px 6px 0; cursor: pointer; display: flex; justify-content: center; align-items: center; color: var(--spa_text_color); box-shadow: 4px 0 10px rgba(0,0,0,0.05); opacity: 0; visibility: hidden; transform: translateX(-10px); transition: all 0.3s ease; }
    #leftside_menu.active .lvi-close-btn { opacity: 1; visibility: visible; transform: translateX(0); transition-delay: 0.3s; }
    #leftside_menu ul { list-style: none; margin: 0; padding: 0; display: block; }
    #leftside_menu .wrapper > ul > li { border-bottom: 1px solid rgba(193, 166, 141, 0.15); display: block; height: auto; }
    #leftside_menu ul li > a, #leftside_menu ul li > span { display: flex; align-items: center; padding: 12px 25px 12px 0; font-family: var(--font_serif); font-size: 16px; color: var(--spa_text_color); text-decoration: none; cursor: pointer; position: relative; transition: color 0.3s ease, padding 0.3s ease; box-sizing: border-box; min-height: 44px; }
    #leftside_menu ul li > a:hover, #leftside_menu ul li > span:hover { color: var(--spa_accent); padding: 12px 17px 12px 8px; }
    #leftside_menu ul li:has(ul) > a::after, #leftside_menu ul li:has(ul) > span::after { content: '+'; position: absolute; right: 5px; top: 50%; transform: translateY(-50%); font-family: var(--font_sans); font-size: 18px; transition: transform 0.4s ease, color 0.3s ease; }
    #leftside_menu ul li.active > a::after, #leftside_menu ul li.active > span::after { transform: translateY(-50%) rotate(45deg); color: var(--spa_accent); }
    #leftside_menu ul li ul { max-height: 0; overflow: hidden; opacity: 0; transition: max-height 0.5s cubic-bezier(0, 1, 0, 1), opacity 0.4s ease, padding 0.4s ease; background: rgba(193, 166, 141, 0.04); display: block; }
    #leftside_menu ul li.active > ul { max-height: 1000px; opacity: 1; padding-bottom: 10px; transition: max-height 0.5s ease-in-out, opacity 0.4s ease 0.1s, padding 0.4s ease; }
    #leftside_menu ul li ul li { border-bottom: none; }
    #leftside_menu ul li ul li a { font-family: var(--font_sans); font-size: 14px; padding: 10px 20px; color: #665c55; }
    #leftside_menu ul li ul li a:hover { color: var(--spa_accent); padding: 10px 12px 10px 28px; }


    /* =========================================
       6. APP LAYOUT & LAZY LOAD
    ========================================= */
    #app { flex: 1; position: relative; display: flex; flex-direction: column; overflow: hidden; width: 100%; background: var(--app_background_color); }
    .app_scroller { position: absolute; top: 0; left: 0; right: 0; bottom: 0; overflow-y: auto; overflow-x: hidden; -webkit-overflow-scrolling: touch; overscroll-behavior-y: contain; }
    .app_container { width: 100%; }
    
    .lazy_image_container { display: block; position: relative; z-index: 1; width: 100%; height: 100%; pointer-events: none; -ms-user-select: none; user-select: none; }
    .lazy_image_container::before { --size: var(--spinner_size, min(50%, 100px)); content: ''; position: absolute; top: 50%; left: 50%; width: var(--size); height: var(--size); display: block; z-index: 1; margin: calc(var(--size) * -0.5) 0 0 calc(var(--size) * -0.5); background: var(--lvi_spinner_svg_url) no-repeat center center; background-size: cover; -webkit-animation: var(--lvi_spinner_animation); animation: var(--lvi_spinner_animation); }
    .lazy_image_container.white::before { filter: brightness(0) invert(1); }
    .lazy_image_container.loaded::before { display: none; }
    .lazy_image_container.error::before { display: none; }
    .lazy_image_container.error::after { content: '!'; position: absolute; z-index: 1; width: 100%; height: 100%; top: 0; left: 0; margin: 0; font-size: 5rem; display: flex; align-items: center; justify-content: center; color: red; }
    .lazy_image_container.no_spinner::before { display: none !important; }
    .lazy_image_container > img { position: relative; z-index: 2; display: block; width: 100%; height: 100%; object-fit: cover; }
    .lazy_image_container.fade_in > img { opacity: 0; transition: opacity 0.5s; }
    .lazy_image_container.fade_in.loaded > img { opacity: 1; }
    .lazy_image_container.zoom_in > img { opacity: 0; transform: scale(1.05) translate3d(0, 20px, 0); filter: blur(10px); -webkit-backface-visibility: hidden; backface-visibility: hidden; will-change: transform, opacity, filter; transition: opacity 0.8s ease, transform 1.2s cubic-bezier(0.21, 1, 0.32, 1), filter 1s ease; }
    .lazy_image_container.zoom_in.loaded > img { opacity: 1; transform: scale(1) translate3d(0, 0, 0); filter: blur(0); }

    .btn_primary { display: inline-block; padding: 16px 38px; background: #D9C5B2; color: var(--spa_text_color); border-radius: 40px; text-decoration: none; font-family: var(--font_sans); font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase; font-weight: 600; transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); box-shadow: 0 8px 20px rgba(193, 166, 141, 0.25); border: none; cursor: pointer; }
    .btn_primary:hover { background: var(--spa_accent); color: #fff; transform: translateY(-5px); box-shadow: 0 15px 30px rgba(193, 166, 141, 0.4); }
    .btn_primary::after{content:'Tìm hiểu thêm';}
    .btn_primary>span{display:block;position:absolute;opacity:0;}

/* =========================================
       7. SECTION: HERO BANNER
    ========================================= */
    .section.hero_banner { display: block; height: calc(100vh - 140px); height: calc(100dvh - 140px); position: relative; z-index: 1; }
    .section.hero_banner .background { display: block; width: 100%; height: 100%; position: absolute; top: 0; left: 0; z-index: 1; overflow: hidden; }
    .section.hero_banner .background .image, .section.hero_banner .background .image img { width: 100%; height: 100%; object-fit: cover; object-position: center; display: block; }
    
    .section.hero_banner .overlay { display: block; width: 100%; height: 100%; position: absolute; top: 0; left: 0; z-index: 2; overflow: hidden; }
    
    .section.hero_banner .overlay .wave_bottom { position: absolute; bottom: 0; left: 0; width: 100%; height: auto; transform: translateY(1px); }
    .section.hero_banner .wrapper { position: relative; z-index: 3; height: 100%; }
    
    /* Canh giua text tren Hero Banner */
    .section.hero_banner .content_container { display: flex; align-items: center; justify-content: center; height: 100%; padding-right: 0; }
    
    .section.hero_banner .hero_minimal_text {
        background: rgba(25, 20, 15, 0.45);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        padding: 25px 50px;
        border-radius: 50px;
        border: 1px solid rgba(255, 255, 255, 0.25);
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
        text-align: center;
        animation: floatPill 4s ease-in-out infinite;
    }
    
/* =========================================
   HERO TEXT ANIMATIONS & STYLING (NEW CREATIVE)
========================================= */
.section.hero_banner .hero_minimal_text {
    text-align: center;
    position: relative;
    padding: 20px;
    /* Xóa hoàn toàn bg viên thuốc, border và box-shadow cũ */
}

/* Tạo một vầng sáng ảo mờ phía sau để tôn chữ mà không cần đóng khung cứng nhắc */
.section.hero_banner .hero_minimal_text::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 350px;
    height: 200px;
    transform: translate(-50%, -50%);
    background: radial-gradient(ellipse at center, rgba(30, 25, 20, 0.65) 0%, rgba(30, 25, 20, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.section.hero_banner .hero_title {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 25px; /* Tăng khoảng cách để chèn thanh ngang */
    margin: 0;
    position: relative;
}

.section.hero_banner .hero_welcome {
    font-family: var(--font_sans);
    font-size: 16px;
    letter-spacing: 5px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
    text-shadow: 0 2px 5px rgba(0,0,0,0.5);
    opacity: 0;
    transform: translateY(15px);
    animation: lvi-fade-up 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.section.hero_banner .hero_brand {
    font-family: var(--font_serif);
    font-size: 56px; /* Tăng size để thương hiệu bệ vệ hơn */
    letter-spacing: 3px;
    text-transform: uppercase;
    font-weight: bold;
    text-shadow: 0 5px 20px rgba(0,0,0,0.6);
    background: linear-gradient(to right, #D4AF37, #FFDF73, #FFFFFF, #FFDF73, #D4AF37);
    background-size: 200% auto;
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
    opacity: 0;
    transform: translateY(15px) scale(0.95);
    animation: 
        lvi-fade-up-brand 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s forwards,
        lvi-luxury-shimmer-text 3s linear infinite 1.4s;
}

/* Keyframes */
@keyframes lvi-fade-up {
    to { opacity: 1; transform: translateY(0); }
}

@keyframes lvi-fade-up-brand {
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes lvi-luxury-shimmer-text {
    0% { background-position: -200% center; }
    100% { background-position: 200% center; }
}

@keyframes lvi-expand-line {
    to { transform: translate(-50%, -50%) scaleX(1); }
}

/* Fix lỗi nhảy layout (.content_container) trên Mobile */
@media (max-width: 992px) {
    .wrapper { padding: 0 20px; }
    
    /* Cố định height thay vì để auto, giúp flex canh giữa hoạt động chính xác */
    .section.hero_banner { height: calc(100vh - 140px); height: calc(100dvh - 140px); min-height: 500px; max-height: 700px; }
    .section.hero_banner .content_container { padding: 0; } 
    
    .section.hero_banner .hero_minimal_text::before { width: 280px; height: 160px; }
    .section.hero_banner .hero_title { gap: 15px; }
    .section.hero_banner .hero_welcome { font-size: 12px; letter-spacing: 2px; }
    .section.hero_banner .hero_brand { font-size: 32px; }
}


    /* =========================================
       8. SECTION: INTRO (CEO)
    ========================================= */
    .section.intro {
        position: relative; padding: 100px 0; background: var(--sticky_bar_background); overflow: hidden;
    }
    .section.intro .background { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; overflow: hidden; pointer-events: none; }
    .section.intro .bg_orb { position: absolute; border-radius: 50%; filter: blur(90px); animation: floatOrb 12s infinite alternate ease-in-out; }
    .section.intro .bg_orb.orb_1 { width: 400px; height: 400px; background: #D9C5B2; top: 15%; left: 10%; opacity: 0.6; }
    .section.intro .bg_orb.orb_2 { width: 350px; height: 350px; background: #C1A68D; bottom: 30%; right: 10%; opacity: 0.4; animation-delay: -5s; animation-duration: 15s;}
    @keyframes floatOrb { 0% { transform: translate(0, 0) scale(1); } 100% { transform: translate(60px, -20px) scale(1.1); } }

    .section.intro .content_container { position: relative; z-index: 2; display: flex; align-items: center; gap: 80px; }
    .section.intro .col_image, .section.intro .col_text { flex: 1; width: 100%; }

    .section.intro .ceo_art_wrapper { position: relative; width: 100%; max-width: 450px; margin: auto; aspect-ratio: 1 / 1; }
    .section.intro .ceo_art_layer { position: absolute; top: 20px; left: -20px; right: -20px; bottom: -20px; border: 2px solid var(--spa_accent); border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%; animation: morphBlob 12s ease-in-out infinite reverse; z-index: 1; }
    .section.intro .ceo_img_mask { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; animation: morphBlob 10s ease-in-out infinite; box-shadow: 0 20px 40px rgba(74, 59, 50, 0.15); overflow: hidden; z-index: 2; -webkit-mask-image: -webkit-radial-gradient(white, black); }
    .section.intro .ceo_img_mask img { width: 100%; height: 100%; object-fit: cover; }
    @keyframes morphBlob { 0% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; } 50% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; } 100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; } }

    .section.intro .text_box h4, .section.intro .text_box .intro_small_title { font-family: var(--font_sans); font-size: 14px; color: var(--spa_accent); text-transform: uppercase; letter-spacing: 2px; margin: 0 0 15px 0; font-weight: 600; }
    .section.intro .text_box h2 { font-family: var(--font_serif); font-size: 42px; color: var(--spa_text_color); margin: 0 0 25px 0; font-weight: normal; line-height: 1.2; }
    .section.intro .text_box p { font-family: var(--font_sans); font-size: 16px; color: #665c55; line-height: 1.8; margin: 0 0 20px 0; }
    .btn_primary { margin-top: 20px; }

    @media (max-width: 992px) {
        .section.intro { padding: 60px 0; }
        .section.intro .content_container { flex-direction: column; gap: 50px; text-align: center; }
        .section.intro .col_image { display: block; width: 100%; }
        .section.intro .ceo_art_wrapper { max-width: 350px; margin: 0 auto; }
        .section.intro .text_box h2 { font-size: 32px; }
    }


    /* =========================================
       9. CAROUSEL CHUNG (Cho toàn site)
    ========================================= */
    .carousel_wrapper { 
        display: flex; align-items: center; gap: 15px; position: relative; 
        user-select: none; -webkit-user-select: none;
    }
    
    .carousel_container {
        display: flex; gap: 20px; overflow-x: auto; scroll-snap-type: x mandatory;
        padding: 20px 5px; flex: 1; scroll-behavior: smooth; cursor: grab;
        -ms-overflow-style: none; scrollbar-width: none;
    }
    .carousel_container:active { cursor: grabbing; }
    .carousel_container::-webkit-scrollbar { display: none; }

    .carousel_container.dragging {
        scroll-snap-type: none; 
        scroll-behavior: auto; 
    }

    .nav_btn {
        position: absolute; top: 50%; margin-top: -22px; 
        width: 44px; height: 44px; border-radius: 50%; background: #ffffff; color: var(--spa_text_color);
        border: 1px solid rgba(193, 166, 141, 0.3); cursor: pointer; z-index: 10;
        display: flex; justify-content: center; align-items: center;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1); transition: all 0.3s ease;
    }
    .nav_btn.prev { left: -22px; }
    .nav_btn.next { right: -22px; }
    .nav_btn:hover { background: var(--spa_accent); color: #fff; border-color: var(--spa_accent); }
    .nav_btn svg { width: 20px; height: 20px; stroke-width: 2; }

    @media (max-width: 1260px) {
        .carousel_wrapper { padding: 0 40px; } 
        .nav_btn.prev { left: 0px; }
        .nav_btn.next { right: 0px; }
    }
    @media (max-width: 992px) {
        .carousel_wrapper { padding: 0 25px; }
        .nav_btn { width: 36px; height: 36px; margin-top: -18px; }
        .nav_btn svg { width: 16px; height: 16px; }
    }

    .carousel_item {
        scroll-snap-align: start; 
        background: var(--sticky_bar_background); border-radius: 20px;
        padding: 15px; box-sizing: border-box; box-shadow: 0 10px 30px rgba(0,0,0,0.04);
        transition: transform 0.4s ease, box-shadow 0.4s ease;
        display: flex; flex-direction: column; text-align: center;
        border: 1px solid rgba(255, 255, 255, 0.6); pointer-events: auto;
    }
    .carousel_item:hover { transform: translateY(-10px); box-shadow: 0 15px 40px rgba(193, 166, 141, 0.15); }
    .carousel_item .card_img_wrap { border-radius: 12px; overflow: hidden; position: relative; pointer-events: none; }
    .carousel_item .card_img_wrap img { transition: transform 0.6s ease; pointer-events: none; }
    .carousel_item:hover .card_img_wrap img { transform: scale(1.08); }

    .carousel_item .btn_explore {
        display: inline-block; padding: 10px 24px; background: var(--spa_accent); color: #fff;
        border: none; border-radius: 30px; text-decoration: none;
        font-family: var(--font_sans); font-size: 13px; font-weight: 600; text-transform: uppercase;
        transition: all 0.3s ease; margin-top: auto; box-shadow: 0 5px 15px rgba(193, 166, 141, 0.3);
    }
    .carousel_item .btn_explore::after{content:'Khám phá';}
    .carousel_item .btn_explore>span{display:block;position:absolute;opacity:0;}
    .carousel_item .btn_explore:hover { background: var(--spa_text_color); transform: translateY(-3px); box-shadow: 0 8px 20px rgba(74, 59, 50, 0.3); }


    .carousel_item .btn_explore_course {
        display: inline-block; padding: 10px 24px; background: var(--spa_accent); color: #fff;
        border: none; border-radius: 30px; text-decoration: none;
        font-family: var(--font_sans); font-size: 13px; font-weight: 600; text-transform: uppercase;
        transition: all 0.3s ease; margin-top: auto; box-shadow: 0 5px 15px rgba(193, 166, 141, 0.3);
    }
    .carousel_item .btn_explore_course::after{content:'Chi tiết khoá học';}
    .carousel_item .btn_explore_course>span{display:block;position:absolute;opacity:0;}
    .carousel_item .btn_explore_course:hover { background: var(--spa_text_color); transform: translateY(-3px); box-shadow: 0 8px 20px rgba(74, 59, 50, 0.3); }


    /* =========================================
       10. SECTION: SERVICES
    ========================================= */
    .section.services { position: relative; padding: 120px 0 80px 0; background: #EBE2D3; z-index: 1; overflow: hidden; }
    .section.services .wave_top { position: absolute; top: -1px; left: 0; width: 100%; height: auto; z-index: 2; }
    .section.services .zigzag_bottom { position: absolute; bottom: 0; left: 0; width: 100%; height: 20px; z-index: 2; }
    .section.services .bg_svg_anim { position: absolute; top: 15%; bottom: 15%; left: 50%; transform: translateX(-50%); width: 800px; height: auto; opacity: 0.04; pointer-events: none; z-index: 0; animation: slowRotate 40s linear infinite; }
    @keyframes slowRotate { 100% { transform: translateX(-50%) rotate(360deg); } }

    .section.services .wrapper { position: relative; z-index: 3; }
    .section.services .section_header { text-align: center; margin-bottom: 20px; max-width: 600px; margin-left: auto; margin-right: auto; }
    .section.services .section_header h2 { font-family: var(--font_serif); font-size: 42px; color: var(--spa_text_color); margin: 0 0 15px 0; font-weight: normal; }
    .section.services .section_header p { font-family: var(--font_sans); font-size: 16px; color: #665c55; line-height: 1.6; margin: 0; }

    .section.services .carousel_item { flex: 0 0 calc((100% - 40px) / 3); }
    .section.services .carousel_item .card_img_wrap { aspect-ratio: 4/3; margin-bottom: 25px; }

    .section.services .price_badge {
        position: absolute; bottom: 10px; right: 10px;z-index:1;
        background: rgba(253, 251, 247, 0.9); backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px);
        color: var(--spa_text_color); font-family: var(--font_sans); font-weight: 600; font-size: 14px;
        padding: 6px 12px; border-radius: 30px; box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }
    .section.services h3 { font-family: var(--font_serif); font-size: 20px; color: var(--spa_text_color); margin: 0 0 10px 0; font-weight: normal; }
    .section.services p { font-family: var(--font_sans); font-size: 14px; color: #665c55; line-height: 1.6; margin: 0 0 15px 0; }

    @media (max-width: 992px) { 
        .section.services .carousel_item { flex: 0 0 calc((100% - 20px) / 2); } 
        .section.services { padding: 80px 0 60px 0; }
        .section.services .section_header h2 { font-size: 32px; }
    }
    @media (max-width: 600px) { .section.services .carousel_item { flex: 0 0 100%; } }

    /* =========================================
       11. SECTION: PROGRESS (QUY TRÌNH)
    ========================================= */
    .section.progress { position: relative; padding: 120px 0; background: var(--sticky_bar_background); z-index: 1; }
    .section.progress .section_header { text-align: center; margin-bottom: 50px; }
    .section.progress .section_header h2 { font-family: var(--font_serif); font-size: 42px; color: var(--spa_text_color); margin: 0 0 15px 0; font-weight: normal; }
    .section.progress .section_header p { font-family: var(--font_sans); font-size: 16px; color: #665c55; line-height: 1.6; margin: 0; }

    .section.progress .carousel_item { flex: 0 0 calc((100% - 60px) / 4); }
    .section.progress .carousel_item .card_img_wrap { aspect-ratio: 1/1; border-radius: 50%; margin-bottom: 25px;}

    .section.progress .step_number {
        position: absolute; top: 10px; left: 10px;
        background: rgba(253, 251, 247, 0.9); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
        width: 45px; height: 45px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
        font-family: var(--font_serif); font-size: 20px; color: var(--spa_accent); font-weight: bold;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1); z-index: 3;
    }
    .section.progress h3 { font-family: var(--font_serif); font-size: 20px; color: var(--spa_text_color); margin: 0 0 10px 0; font-weight: normal; }
    .section.progress p { font-family: var(--font_sans); font-size: 14px; color: #665c55; line-height: 1.6; margin: 0; }

    @media (max-width: 1200px) { .section.progress .carousel_item { flex: 0 0 calc((100% - 40px) / 3); } }
    @media (max-width: 992px) { 
        .section.progress .carousel_item { flex: 0 0 calc((100% - 20px) / 2); } 
        .section.progress { padding: 80px 0; } 
        .section.progress .section_header h2 { font-size: 32px; } 
    }
    @media (max-width: 600px) { .section.progress .carousel_item { flex: 0 0 100%; } }

    /* =========================================
       12. SECTION: FEEDBACK
    ========================================= */
    .section.feedback { position: relative; padding: 120px 0; background: var(--app_background_color); z-index: 1; }
    .section.feedback .wave_top { position: absolute; top: -1px; left: 0; width: 100%; height: auto; z-index: 2; }
    .section.feedback .section_header { text-align: center; margin-bottom: 50px; }
    .section.feedback .section_header h2 { font-family: var(--font_serif); font-size: 42px; color: var(--spa_text_color); margin: 0 0 15px 0; font-weight: normal; }
    .section.feedback .section_header p { font-family: var(--font_sans); font-size: 16px; color: #665c55; line-height: 1.6; margin: 0; }

    .single_item_carousel .carousel_item { scroll-snap-align: center; flex: 0 0 100%; background: transparent; border: none; box-shadow: none; padding: 0 15px; }
    .single_item_carousel .carousel_item:hover { transform: none; box-shadow: none; }

    .feedback_card {
        max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; text-align: center;
        padding: 50px 40px; background: var(--sticky_bar_background); border-radius: 30px; box-shadow: 0 15px 40px rgba(74, 59, 50, 0.08); position: relative; border: 1px solid rgba(255, 255, 255, 0.6);
    }
    .feedback_card .quote_icon { font-family: var(--font_serif); font-size: 80px; color: var(--spa_accent); line-height: 1; opacity: 0.3; margin-top: -20px; margin-bottom: 10px; }
    .feedback_card p.review_text { font-family: var(--font_serif); font-size: 22px; font-style: italic; color: var(--spa_text_color); line-height: 1.8; margin-bottom: 40px; }
    .feedback_card .customer_info { display: flex; align-items: center; gap: 20px; }
    .feedback_card .customer_img { width: 80px; height: 80px; border-radius: 50%; overflow: hidden; border: 3px solid var(--spa_accent); padding: 3px; background: #fff; }
    .feedback_card .customer_img img { border-radius: 50%; pointer-events: none;}
    .feedback_card .customer_details { text-align: left; }
    .feedback_card .customer_details .name { font-family: var(--font_sans); font-size: 18px; color: var(--spa_text_color); margin: 0 0 5px 0; font-weight: bold;display:block; }
    .feedback_card .customer_details span { font-family: var(--font_sans); font-size: 14px; color: #888; text-transform: uppercase; letter-spacing: 1px; }

    @media (max-width: 992px) {
        .section.feedback { padding: 80px 0; }
        .section.feedback .section_header h2 { font-size: 32px; }
        .feedback_card p.review_text { font-size: 18px; }
        .feedback_card { padding: 30px 20px; }
    }

    /* =========================================
       13. SECTION: TRAINING (MỚI)
    ========================================= */
    .section.training { position: relative; padding: 120px 0; background: var(--sticky_bar_background); z-index: 1; overflow: hidden; }
    .section.training .slant_top { position: absolute; top: -1px; left: 0; width: 100%; height: 80px; z-index: 2; }
    .section.training .bg_pattern { position: absolute; top: -50px; right: -50px; width: 300px; height: 300px; background-image: radial-gradient(var(--spa_accent) 2px, transparent 2px); background-size: 20px 20px; opacity: 0.1; z-index: 0; animation: spinPattern 60s linear infinite; }
    @keyframes spinPattern { 100% { transform: rotate(360deg); } }

    .section.training .wrapper { position: relative; z-index: 3; }
    .section.training .section_header { text-align: center; margin-bottom: 50px; }
    .section.training .section_header h2 { font-family: var(--font_serif); font-size: 42px; color: var(--spa_text_color); margin: 0 0 15px 0; font-weight: normal; }
    .section.training .section_header p { font-family: var(--font_sans); font-size: 16px; color: #665c55; line-height: 1.6; margin: 0; }

    .section.training .carousel_item { flex: 0 0 calc((100% - 60px) / 4); background: #fff; }
    .section.training .carousel_item .card_img_wrap { aspect-ratio: 1/1; margin-bottom: 20px; }
    .section.training .carousel_item:hover { border-color: var(--spa_accent); }
    .section.training h3 { font-family: var(--font_serif); font-size: 20px; color: var(--spa_text_color); margin: 0 0 10px 0; font-weight: normal; }
    .section.training p { font-family: var(--font_sans); font-size: 14px; color: #665c55; line-height: 1.6; margin: 0 0 15px 0; }

    @media (max-width: 1200px) { .section.training .carousel_item { flex: 0 0 calc((100% - 40px) / 3); } }
    @media (max-width: 992px) { 
        .section.training .carousel_item { flex: 0 0 calc((100% - 20px) / 2); } 
        .section.training { padding: 80px 0; } 
        .section.training .section_header h2 { font-size: 32px; } 
    }
    @media (max-width: 600px) { .section.training .carousel_item { flex: 0 0 100%; } }

    /* =========================================
       14. SECTION: STUDENT FEEDBACK (MỚI)
    ========================================= */
    .section.student_feedback { position: relative; padding: 120px 0; background: #EBE2D3; z-index: 1; }
    .section.student_feedback .wave_top { position: absolute; top: -1px; left: 0; width: 100%; height: auto; z-index: 2; }
    
    .section.student_feedback .section_header { text-align: center; margin-bottom: 50px; }
    .section.student_feedback .section_header h2 { font-family: var(--font_serif); font-size: 42px; color: var(--spa_text_color); margin: 0 0 15px 0; font-weight: normal; }
    .section.student_feedback .section_header p { font-family: var(--font_sans); font-size: 16px; color: #665c55; line-height: 1.6; margin: 0; }

    .section.student_feedback .carousel_item { 
        flex: 0 0 calc((100% - 40px) / 3); 
        text-align: left; padding: 30px; 
    }
    .section.student_feedback .student_quote { font-family: var(--font_sans); font-size: 15px; font-style: italic; color: #665c55; line-height: 1.6; margin-bottom: 25px; }
    .section.student_feedback .student_info { display: flex; align-items: center; gap: 15px; }
    .section.student_feedback .student_img { width: 50px; height: 50px; border-radius: 50%; overflow: hidden; border: 2px solid var(--spa_accent); pointer-events: none;flex-shrink:0;}
    .section.student_feedback .student_img img { width: 100%; height: 100%; object-fit: cover; }
    .section.student_feedback .student_details .name { font-family: var(--font_sans); font-size: 16px; color: var(--spa_text_color); margin: 0 0 3px 0; font-weight: bold; display:block;}
    .section.student_feedback .student_details span { font-family: var(--font_sans); font-size: 12px; color: #888; text-transform: uppercase; }

    @media (max-width: 992px) { 
        .section.student_feedback .carousel_item { flex: 0 0 calc((100% - 20px) / 2); } 
        .section.student_feedback { padding: 80px 0; } 
        .section.student_feedback .section_header h2 { font-size: 32px; } 
    }
    @media (max-width: 600px) { .section.student_feedback .carousel_item { flex: 0 0 100%; } }

    /* =========================================
       15. SECTION: CTA (MỚI)
    ========================================= */
    @keyframes ctaBgGlow {
        0% { background: var(--spa_accent); }
        50% { background: #A68A61; }
        100% { background: var(--spa_accent); }
    }
    
    @keyframes btnPulse {
        0% { box-shadow: 0 0 0 0 rgba(253, 251, 247, 0.7); }
        70% { box-shadow: 0 0 0 20px rgba(253, 251, 247, 0); }
        100% { box-shadow: 0 0 0 0 rgba(253, 251, 247, 0); }
    }

    .section.cta {
        position: relative; padding: 100px 0; background: var(--spa_accent); color: var(--sticky_bar_background);
        text-align: center; overflow: hidden; z-index: 1;
        animation: ctaBgGlow 6s infinite alternate ease-in-out; 
    }
    
    .section.cta .wave_top {
        position: absolute; top: -1px; left: 0; width: 100%; height: auto; z-index: 2;
    }

    .section.cta .bg_svg_cta {
        position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
        width: 100%; height: 100%; min-width: 1000px; min-height: 1000px; z-index: 0; pointer-events: none;
    }
    
    .section.cta .wrapper { position: relative; z-index: 2; }
    .section.cta .cta_content { max-width: 700px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; }
    
    .section.cta h4, .section.cta .cta_small_title { font-family: var(--font_sans); font-size: 16px; font-weight: 600; text-transform: uppercase; letter-spacing: 3px; margin: 0 0 15px 0; opacity: 0.9; }
    .section.cta h2 { font-family: var(--font_serif); font-size: 48px; font-weight: normal; margin: 0 0 20px 0; line-height: 1.2; }
    .section.cta p { font-family: var(--font_sans); font-size: 18px; line-height: 1.6; margin: 0 0 40px 0; opacity: 0.9; }
    
    .btn_cta_special {
        display: inline-flex; align-items: center; justify-content: center;
        padding: 18px 45px; background: var(--sticky_bar_background); color: var(--spa_text_color);
        font-family: var(--font_sans); font-size: 15px; font-weight: bold; text-transform: uppercase; letter-spacing: 2px;
        border-radius: 50px; text-decoration: none; position: relative; overflow: hidden;
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        box-shadow: 0 10px 30px rgba(74, 59, 50, 0.2);
        animation: btnPulse 2.5s infinite cubic-bezier(0.66, 0, 0, 1);
    }
    .btn_cta_special::before {
        content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
        transition: left 0.5s ease; z-index: 1;
    }
    .btn_cta_special:hover {
        transform: translateY(-5px) scale(1.05);
        box-shadow: 0 15px 40px rgba(74, 59, 50, 0.4);
        background: var(--spa_text_color); color: var(--sticky_bar_background);
        animation: none; 
    }
    .btn_cta_special:hover::before { left: 100%; }
    
    @media (max-width: 992px) {
        .section.cta { padding: 80px 20px; }
        .section.cta h2 { font-size: 36px; }
        .section.cta p { font-size: 16px; }
    }


    /* =========================================
       16. SECTION: FOOTER MAIN
    ========================================= */
    .section.footer { 
        position: relative; z-index: 1; background: var(--spa_text_color); color: var(--sticky_bar_background); padding: 80px 0 60px 0; overflow: hidden;
    }
    .section.footer::before {
        content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
        background-image: radial-gradient(rgba(253, 251, 247, 0.08) 1.5px, transparent 1.5px);
        background-size: 25px 25px; pointer-events: none; z-index: 0;
    }
    .section.footer .content_container { position: relative; z-index: 2; display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; flex-wrap: wrap; }
    .section.footer .footer_col { display: flex; flex-direction: column; gap: 15px; }
    .section.footer .footer_col_logo { flex: 0 0 200px; }
    
    .section.footer .footer_col_contact { flex: 1; min-width: 250px; }
    .section.footer .footer_col_contact h4, .section.footer .footer_col_contact .footer_title { font-family: var(--font_serif); font-size: 24px; margin: 0 0 10px 0; color: var(--spa_accent); font-weight: normal; }
    .section.footer .footer_col_contact p { font-family: var(--font_sans); font-size: 14px; margin: 0; line-height: 1.8; opacity: 0.8; }
    .section.footer .footer_col_contact a {color:inherit;}
    
    .section.footer .footer_col_links { flex: 1; min-width: 200px; }
    .section.footer .footer_col_links h4, .section.footer .footer_col_links .footer_title { font-family: var(--font_sans); font-size: 16px; margin: 0 0 15px 0; color: var(--spa_accent); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
    .section.footer .footer_col_links ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
    .section.footer .footer_col_links a { color: rgba(253, 251, 247, 0.8); text-decoration: none; font-family: var(--font_sans); font-size: 14px; transition: color 0.3s; }
    .section.footer .footer_col_links a:hover { color: var(--spa_accent); }

    .section.footer .footer_col_social { flex: 0 0 auto; }
    .section.footer .footer_col_social h4, .section.footer .footer_col_social .footer_title { font-family: var(--font_sans); font-size: 16px; margin: 0 0 15px 0; color: var(--spa_accent); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
    .section.footer .social_icons { display: flex; gap: 10px; }
    .section.footer .social_icons a { 
        display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%;
        background: rgba(255, 255, 255, 0.1); color: var(--sticky_bar_background); text-decoration: none; transition: all 0.3s ease; 
    }
    .section.footer .social_icons a:hover { background: var(--spa_accent); color: #fff; transform: translateY(-3px); }
    
    @media (max-width: 992px) {
        .section.footer .content_container { flex-direction: column; gap: 40px; }
        .section.footer .footer_col { flex: 1 1 100%; width: 100%; text-align: center; align-items: center; }
        .section.footer .social_icons { justify-content: center; }
    }

    /* =========================================
       17. STICKY ISLAND CTA (VIÊN THUỐC NỔI)
    ========================================= */
    .sticky_cta {
        position: fixed; bottom: 80px; right: 20px; top: auto; transform: none;
        background: linear-gradient(145deg, #5A4A3E, #362A23);
        border: 2px solid rgba(255, 255, 255, 0.3);
        border-radius: 40px; padding: 5px; 
        display: flex; flex-direction: column; align-items: center;
        z-index: 999; box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3), 0 0 20px rgba(255, 255, 255, 0.1);
        cursor: move; touch-action: none;
    }
    .cta_close {
        position: absolute; top: -8px; right: -8px;
        width: 24px; height: 24px; border-radius: 50%;
        background: #fff; color: #362A23;
        display: flex; justify-content: center; align-items: center;
        font-family: var(--font_sans); font-size: 16px; font-weight: bold;
        cursor: pointer; box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        z-index: 2; line-height: 1;
    }
    .cta_close:hover { background: var(--spa_accent); color: #fff; }

    .sticky_cta .cta_item {
        position: relative; width: 44px; height: 44px; border-radius: 22px;
        display: flex; justify-content: center; align-items: center;
        color: var(--sticky_bar_background); text-decoration: none;
        transition: background 0.3s ease, color 0.3s ease;
    }
    .sticky_cta .cta_item:not(:last-child)::after {
        content: ''; position: absolute; bottom: 0; left: 10px; right: 10px;
        height: 1px; background: rgba(255, 255, 255, 0.1); pointer-events: none;
    }
    .sticky_cta .cta_item:hover {
        background: var(--spa_accent); color: #fff;
    }
    .sticky_cta .cta_item i.sprite { --width: 20; }
    
    .sticky_cta .cta_item span {
        position: absolute; right: 100%; top: 50%; transform: translateY(-50%) translateX(15px);
        background: #362A23; 
        color: #fff; padding: 10px 20px; border-radius: 30px;
        font-family: var(--font_sans); font-size: 14px; font-weight: 600; white-space: nowrap;
        opacity: 0; pointer-events: none; transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        margin-right: 15px; box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
    }
    .sticky_cta .cta_item span::after {
        content: ''; position: absolute; top: 50%; left: calc(100% - 1px); 
        transform: translateY(-50%);
        border-width: 6px; border-style: solid;
        border-color: transparent transparent transparent #362A23; 
    }
    .sticky_cta .cta_item:hover span {
        opacity: 1; transform: translateY(-50%) translateX(0);
    }

    /* =========================================
       18. BOTTOM BAR (HACK RUBBERBAND)
    ========================================= */
    #footer { 
        flex-shrink: 0; position: relative; z-index: 40; touch-action: none; 
        background: #362A23; height: 60px; 
    }
    #footer .wrapper {
        display: flex; justify-content: space-between; align-items: center; height: 100%;
        font-family: var(--font_sans); font-size: 13px; color: rgba(253, 251, 247, 0.6);
    }
    #footer .footer_bottom_right { display: flex; gap: 20px; }
    #footer .footer_bottom_right a { color: rgba(253, 251, 247, 0.6); text-decoration: none; transition: color 0.3s ease; }
    #footer .footer_bottom_right a:hover { color: var(--spa_accent); }
    @media (max-width: 600px) {
        #footer { height: auto; padding: 15px 0; }
        #footer .wrapper { flex-direction: column; justify-content: center; gap: 10px; text-align: center; }
    }

    /* =========================================
       19. SECTION: ARTICLES (1, 2, FULL)
    ========================================= */
    .section.article_1, .section.article_2, .section.article_full { position: relative; padding: 80px 0; background: var(--sticky_bar_background); z-index: 1; }
    
    .section.article_1 .content_container, .section.article_2 .content_container { display: flex; align-items: center; gap: 60px; }
    .section.article_2 .content_container { flex-direction: row-reverse; }
    
    .section.article_1 .col_image, .section.article_2 .col_image { flex: 1; width: 100%; border-radius: 20px; overflow: hidden; box-shadow: 0 15px 35px rgba(0,0,0,0.05); }
    .section.article_1 .col_image img, .section.article_2 .col_image img { width: 100%; height: auto; display: block; object-fit: cover; aspect-ratio: 4/3; }
    
    .section.article_1 .col_text, .section.article_2 .col_text, .section.article_full .col_text { flex: 1; width: 100%; }
    .section.article_full .content_container { display: block; max-width: 800px; margin: 0 auto; text-align: center; }

    .article_small_title { font-family: var(--font_sans); font-size: 14px; color: var(--spa_accent); text-transform: uppercase; letter-spacing: 2px; margin: 0 0 15px 0; font-weight: 600; }
    .article_big_title { font-family: var(--font_serif); font-size: 38px; color: var(--spa_text_color); margin: 0 0 20px 0; font-weight: normal; line-height: 1.3; }
    .article_description { font-family: var(--font_sans); font-size: 16px; color: #665c55; line-height: 1.8; margin: 0; }

    @media (max-width: 992px) {
        .section.article_1, .section.article_2, .section.article_full { padding: 60px 0; }
        .section.article_1 .content_container, .section.article_2 .content_container { flex-direction: column; gap: 40px; text-align: center; }
        .article_big_title { font-size: 30px; }
    }

    .course_page_intro{position:relative;padding:38px 0 18px;background:var(--sticky_bar_background);overflow:hidden}.course_page_intro:before{content:'';position:absolute;inset:auto -12% -90px auto;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(193,166,141,.26),rgba(193,166,141,0));pointer-events:none}.course_page_intro .content_container{max-width:920px;margin:0 auto;text-align:center;position:relative;z-index:2}.course_page_intro p{margin:0;font-family:var(--font_sans);font-size:16px;line-height:1.85;color:#665c55}.course_meta_row{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 18px}.course_badge{display:inline-flex;align-items:center;gap:8px;padding:10px 15px;border-radius:999px;background:linear-gradient(135deg,rgba(193,166,141,.17),rgba(193,166,141,.32));border:1px solid rgba(193,166,141,.34);box-shadow:0 8px 20px rgba(193,166,141,.13);font-family:var(--font_sans);font-size:14px;color:var(--spa_text_color);font-weight:700}.course_badge span:first-child{opacity:.76;font-size:12px;text-transform:uppercase;letter-spacing:1.1px;font-weight:600}.course_summary{margin:0 0 20px;font-family:var(--font_sans);font-size:16px;line-height:1.85;color:#665c55}.course_block{background:rgba(255,255,255,.55);border:1px solid rgba(193,166,141,.18);border-radius:18px;padding:22px 24px;box-shadow:0 14px 35px rgba(0,0,0,.035);margin-top:16px}.course_block_title{margin:0 0 14px;font-family:var(--font_sans);color:var(--spa_accent);font-size:13px;letter-spacing:1.4px;text-transform:uppercase;font-weight:700}.course_list{margin:0;padding-left:22px;font-family:var(--font_sans);color:#5f5148}.course_list li{margin:0 0 10px;line-height:1.75;font-size:15px}.course_list li:last-child{margin-bottom:0}.course_note{margin:16px 0 0;font-family:var(--font_sans);font-size:15px;line-height:1.75;color:#7b5d49;font-style:italic}.course_image_caption{margin-top:12px;font-family:var(--font_sans);font-size:13px;line-height:1.6;color:#88786d;text-align:center}.section.article_1 .col_image,.section.article_2 .col_image{background:#fff}@media(max-width:992px){.course_page_intro{padding:24px 0 4px}.course_meta_row{justify-content:center}.course_block{padding:18px;text-align:left}}