@font-face {
    font-family: 'TNH Xuong';
    src: url('fonts/tnh-xuong.otf') format('opentype');
    font-weight: 900;
    font-style: normal;
}

:root {
    --color-bg: #0d2c51;
    --color-text: #ffffff;
    --color-primary: #ffc107;
    --color-accent-blue: #4da6ff;
    --font-body: 'Montserrat', sans-serif;
    --font-display: 'TNH Xuong', 'Montserrat', serif;
    --width-content: 720px;
    --mod-primary: #ffc107;
    --mod-blue: #0062cc;
    --mod-light-blue: rgba(230, 240, 255, 0.5);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
    width: 100%; overflow-x: hidden; margin: 0; padding: 0;
    background-color: var(--color-bg); color: var(--color-text);
}
body { font-family: var(--font-body); font-size: 19px; line-height: 1.5; margin-top: 45px; }

.img-desktop { display: block !important; width: 100%; height: auto; object-fit: cover; }
.img-mobile { display: none !important; }

@media (max-width: 768px) {
    .img-desktop { display: none !important; }
    .img-mobile { 
        display: block !important; width: 100vw; max-width: none; height: auto;
        position: relative; left: 50%; transform: translateX(-50%); object-fit: cover;
    }
}

.sp-sticky-header {
    position: fixed; top: 0; left: 0; width: 100%; height: 45px;
    background-color: #000; display: flex; align-items: center; justify-content: space-between;
    z-index: 99999; box-shadow: 0 2px 5px rgba(0,0,0,0.5);
}
.left-group, .right-group { display: flex; align-items: center; }

.sp-back-to-k14 {
    display: flex; align-items: center; justify-content: center; width: 45px; height: 45px;
    background-color: #007f74; color: white; text-decoration: none; font-size: 18px;
}

.header-soha-logo img { height: 22px; width: auto; display: block; margin-left: 15px; }
.center-logo img { height: 26px; width: auto; display: block; filter: brightness(0) invert(1); }
.fb-custom-btn {
    display: flex; align-items: center; gap: 6px; color: white; text-decoration: none;
    font-size: 13px; font-family: Helvetica, Arial, sans-serif; font-weight: bold; margin-right: 15px;
}

.mobile-emag-logo { display: none; height: 24px; width: auto; margin-right: 15px; filter: brightness(0) invert(1); }

@media (max-width: 768px) {
    .center-logo, .fb-custom-btn { display: none !important; }
    .mobile-emag-logo { display: block !important; }
}

.article-body { 
    width: 100%; max-width: var(--width-content); margin: 0 auto; padding: 0 15px; 
    position: relative; z-index: 10; background: transparent; 
}
.content-bg { background-color: var(--color-bg); position: relative; z-index: 10; }
h2 { font-family: var(--font-display); font-size: 2.5rem; color: var(--color-primary); font-weight: 900; margin: 4px 0 30px 0; line-height: 1.2; }
p { margin-bottom: 28px; text-align: justify; color: #e0e0e0; }
.sapo { font-weight: 700; font-size: 25px; margin-bottom: 50px; color: #fff; line-height: 1.3; }
.sapo p { color: #fff; }

.full-width-media { width: 100vw; position: relative; left: 50%; transform: translateX(-50%); margin: 60px 0; }
.full-width-media img { width: 100%; height: auto; display: block; object-fit: cover; }
.wide-media { width: 100%; max-width: 1000px; margin: 60px auto; display: block; position: relative; }
.wide-media img { width: 100%; height: auto; display: block; object-fit: cover; }
.z-high { position: relative; z-index: 10 !important; }

@media(max-width: 768px) {
    .scrolly-quote-fix { width: 100% !important; max-width: 100% !important; }
}

.cover-section {
    position: relative; width: 100%; min-height: 170vh; height: auto;
    overflow: hidden; display: flex; align-items: flex-end; justify-content: center;
    background: #000; z-index: 1;
}
.cover-img { position: absolute; top: 0; left: 0; width: 100%; height: 100% !important; object-fit: cover; z-index: 0; }

@media (max-width: 768px) {
    .cover-section { min-height: auto; height: auto; display: block; padding: 0; margin: 0; width: 100%; }
    .cover-img.img-mobile {
        position: relative !important;
        width: 100% !important;
        height: auto !important;
        max-width: 100% !important;
        left: 0 !important; 
        right: 0 !important;
        margin: 0 !important;
        transform: none !important;
        object-fit: contain;
        display: block !important;
    }
}

.scrolly-container {
    position: relative; width: 100%;
    background-image: url('https://sohanews.sohacdn.com/160588918557773824/2025/12/31/nhon-trach-3-420240829142454-1767170875877204718074.jpg');
    background-attachment: fixed; background-position: center center; background-size: cover;
    padding-top: 100px; padding-bottom: 0px; z-index: 20; overflow: hidden;
}
.scrolly-fade-top, .scrolly-fade-bottom {
    position: absolute; left: 0; width: 100%; height: 200px; z-index: 2; pointer-events: none;
}
.scrolly-fade-top { top: 0; background: linear-gradient(to bottom, var(--color-bg) 0%, rgba(13, 44, 81, 0) 100%); }
.scrolly-fade-bottom { bottom: 0; background: linear-gradient(to top, var(--color-bg) 0%, rgba(13, 44, 81, 0) 100%); }
.scrolly-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(13, 44, 81, 0.7); z-index: 1; }
.scrolly-content { position: relative; z-index: 5; width: 100%; margin: 0 auto; }

.text-overlay-plain {
    background: transparent; border: none; padding: 40px 0; margin-bottom: 40px;
    max-width: var(--width-content); width: 100%; margin-left: auto; margin-right: auto;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.9);
}
.text-overlay-plain p { color: #fff; margin-bottom: 20px; font-size: 20px; }
@media (max-width: 768px) { .text-overlay-plain { padding-left: 15px; padding-right: 15px; } }
.scroll-anim-item { opacity: 0; transform: translateY(50px); }

.mask-edge {
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 15%, black 85%, transparent 100%);
    mask-image: linear-gradient(to bottom, transparent 0%, black 15%, black 85%, transparent 100%);
}

.info-pin-wrapper {
    position: relative; width: 100%; height: 200vh; 
    background: transparent !important; margin: 60px 0 0 0; z-index: 5;
}
.info-pin-container { position: relative; top: 0; width: 100%; height: calc(100vh - 45px); overflow: hidden; }

.pinned-main-title {
    position: absolute; top: 20%; left: 0; width: 100%; text-align: center; z-index: 20; padding: 0 20px; opacity: 0;
}
.pinned-main-title h2 { color: var(--color-primary); text-shadow: 0 4px 10px rgba(0,0,0,0.8); margin: 0; }

.info-layer {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    padding: 180px 40px 40px 40px; opacity: 0; transition: opacity 0.6s ease;
    background: transparent !important; 
}
.info-layer::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(13, 44, 81, 0.4); z-index: 0; border-radius: 20px; backdrop-filter: blur(5px);
}
.info-content { position: relative; z-index: 1; max-width: 900px; width: 100%; }
.info-title { 
    font-family: var(--font-display); font-weight: 900; font-size: 2.5rem; 
    color: var(--color-primary); margin-bottom: 40px; text-align: center; 
    text-shadow: 0 4px 10px rgba(0,0,0,0.8); line-height: 1.3;
}
.info-list-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.info-group h4 { color: #fff; font-family: var(--font-body); text-transform: uppercase; border-bottom: 1px solid #fff; padding-bottom: 15px; margin-bottom: 20px; font-size: 1.2rem; font-weight: 700; text-shadow: 0 2px 4px rgba(0,0,0,0.8); }
.info-group ul { list-style: none !important; padding-left: 0; }
.info-group li { margin-bottom: 15px; font-size: 17px; padding-left: 20px; position: relative; color: #fff; text-shadow: 0 2px 4px rgba(0,0,0,0.8); list-style-type: none; }
.info-group li::before { content: '✦'; color: var(--color-primary); position: absolute; left: 0; }

@media(max-width: 768px) {
    .info-pin-wrapper { height: auto; }
    .info-pin-container { height: auto; overflow: visible; }
    .pinned-main-title { display: none !important; }

    .info-layer {
        position: relative; top: auto; left: auto; height: auto; opacity: 1 !important; 
        padding: 40px 20px; margin-bottom: 40px; display: block;
    }
    .info-layer::before { content: none !important; display: none !important; }
    .info-list-grid { grid-template-columns: 1fr; gap: 20px; }
    .info-title { font-size: 1.8rem; margin-bottom: 20px; }
}

#lng-placeholder-zone { width: 100vw; position: relative; left: 50%; transform: translateX(-50%); background-color: transparent; min-height: 600px; display: block; z-index: 15; padding: 60px 0; }
.lng-container { max-width: 1000px; margin: 0 auto; background: transparent; padding: 0 15px; font-family: 'Roboto', sans-serif; color: #fff; }
.lng-container h1, .lng-container h2, .lng-container h3, .lng-container h4 { font-family: 'Merriweather', serif; }

.lng-header { text-align: center; border-bottom: 2px solid var(--mod-primary); padding-bottom: 20px; margin-bottom: 30px; }
.lng-header h1 { color: var(--mod-primary); font-size: 2.5rem; text-transform: uppercase; }
.lng-header .subtitle { color: #e0e0e0; font-style: normal; text-align: center; margin-top: 5px; font-size: 18px; }

.lng-tabs { display: flex; background: transparent; border-bottom: 1px solid var(--mod-primary); overflow-x: auto; white-space: nowrap; margin-bottom: 30px; scrollbar-width: none; }
.lng-tabs::-webkit-scrollbar { display: none; }
.lng-tab-btn { flex: 1; padding: 15px 20px; border: 1px solid transparent; background: rgba(255,255,255,0.1); color: #bbb; font-family: 'Merriweather', serif; font-weight: 700; cursor: pointer; transition: 0.3s; text-align: center; }
.lng-tab-btn.active { background: var(--mod-primary); color: #000; font-weight: 900; }

.lng-content-section { display: none; animation: fadeIn 0.5s; }
.lng-content-section.active { display: block; }

.process-step { 
    background: rgba(13, 44, 81, 0.6); 
    border: 1px solid var(--mod-primary); 
    padding: 20px; display: flex; align-items: center; gap: 20px; margin-bottom: 15px; color: #fff; 
}
.process-step h4 { color: var(--mod-primary); margin-bottom: 5px; }
.process-step p { color: #e0e0e0; margin-bottom: 0; text-align: left; }

.icon-box { font-size: 2rem; width: 60px; height: 60px; display: flex; align-items: center; justify-content: center; background: rgba(255, 255, 255, 0.1); color: var(--mod-primary); font-weight: bold; flex-shrink: 0; border: 1px solid var(--mod-primary); }

.volume-visual {
    display: flex; justify-content: space-around; align-items: flex-end;
    height: 250px; margin-top: 40px; padding-top: 50px; 
    border-bottom: 2px solid #fff; width: 100%; padding-bottom: 10px;
}
.gas-state {
    width: 150px; border: 2px dashed var(--mod-primary);
    display: flex; align-items: center; justify-content: center;
    color: var(--mod-primary); font-weight: bold;
    position: relative; overflow: hidden; transition: height 1s;
}
.liquid-state { width: 60px; background-color: var(--mod-blue); display: flex; align-items: flex-end; justify-content: center; color: white; transition: height 1s; }
.particle { position: absolute; width: 6px; height: 6px; background-color: rgba(255, 193, 7, 0.8); border-radius: 50%; animation: floatGas 3s infinite linear; }
@keyframes floatGas {
    0% { transform: translate(0, 0); opacity: 0; } 20% { opacity: 1; } 80% { opacity: 1; } 100% { transform: translate(var(--mx, 20px), var(--my, -30px)); opacity: 0; }
}

.tech-analogy { display: flex; gap: 20px; margin: 30px 0; }
.tech-box { flex: 1; background: rgba(13, 44, 81, 0.6); border: 1px solid var(--mod-primary); padding: 20px; text-align: center; color: #fff; }
.tech-box h4 { color: var(--mod-primary); }
.tech-box p { color: #e0e0e0; text-align: center; font-size: 16px; }

.tech-visual { 
    height: 150px; margin-bottom: 15px; 
    display: flex; flex-direction: column; justify-content: flex-end; align-items: center; 
    background: rgba(255,255,255,0.1); border: 1px dashed rgba(255,255,255,0.3); position: relative; 
}
.cycle-heat { width: 80%; position: absolute; bottom: 0; transition: height 1s; }

.chart-container { width: 100%; height: 400px; margin-top: 20px; }
.info-card { background: rgba(255,255,255,0.1); border-left: 8px solid var(--mod-primary); padding: 20px; margin-bottom: 20px; color: #fff; }
.info-card b { color: var(--mod-primary); }

@media (max-width: 600px) {
    .tech-analogy { flex-direction: column; }
    .process-step { flex-direction: column; text-align: center; }
    .process-step p { text-align: center; }
    .volume-visual { height: 200px; }
}

.last-section-wrapper { padding-bottom: 0 !important; }

.footer-credits {
    text-align: center; padding: 20px 20px 60px 20px; margin-top: 30px; 
    background: var(--color-bg); font-family: var(--font-body); color: #888; 
    font-size: 13px; text-transform: uppercase; letter-spacing: 2px;
    position: relative; z-index: 20;
}

.video-container {
    width: 100%; max-width: 1920px; margin: 40px auto 0 auto;
    position: relative; z-index: 15; background: #000;
}
.VCSortableInPreviewMode { width: 100%; }
.VideoCMS_Caption p { color: #ccc; font-size: 14px; margin-top: 10px; text-align: center; font-style: normal; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }