/* Giao diện trang giới thiệu duhocgct.com theo nhận diện hoavan-gct.com:
   đỏ GCT trên thanh điều hướng, nút xanh lá bo tròn, chữ Roboto.
   Khu vực hồ sơ (#portal-app) giữ nguyên kiểu của portal.css. */
:root{
  --g-red:#c72128;--g-red-dark:#a3161d;--g-red-soft:#fdeeee;
  --g-green:#20a83c;--g-green-dark:#157d43;--g-green-soft:#eaf6ee;
  --g-ink:#203d31;--g-text:#2b2f2d;--g-muted:#5d6a63;
  --g-bg:#ffffff;--g-bg-soft:#f5faf7;--g-line:#e2ebe5;
  --g-shadow:0 10px 30px rgba(32,61,49,.08);--g-radius:14px;
}
body.gct{background:var(--g-bg);color:var(--g-text);font-family:Roboto,"Be Vietnam Pro",Arial,sans-serif;font-size:16px}
.gct h1,.gct h2,.gct h3{font-family:Roboto,"Be Vietnam Pro",Arial,sans-serif;letter-spacing:-.01em}
.g-wrap{max-width:1175px;margin:0 auto;padding:0 24px}
.gct [id]{scroll-margin-top:140px}

/* Thanh trên cùng + đầu trang */
.g-topbar{background:var(--g-red);color:#fff;font-size:13px}
.g-topbar .g-wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:36px}
.g-topbar a{color:#fff;text-decoration:none}
.g-topbar a:hover{text-decoration:underline}
.g-topbar-links{display:flex;gap:20px;align-items:center}
.g-topbar-links>span{opacity:.85}
.g-header{background:#fff;position:sticky;top:0;z-index:30;box-shadow:0 2px 10px rgba(0,0,0,.06)}
.g-header-row{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:84px}
.g-brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.g-brand img{width:108px;height:63px;object-fit:contain}
.g-brand b{display:block;color:var(--g-green-dark);font-size:17px;font-weight:900;letter-spacing:.04em;line-height:1.1}
.g-brand small{display:block;color:var(--g-red);font-size:12px;font-weight:700;letter-spacing:.12em;margin-top:3px}
.g-header-actions{display:flex;align-items:center;gap:12px}
.g-pill{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 22px;border-radius:99px;font:700 14px/1 Roboto,Arial,sans-serif;text-transform:uppercase;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:background .2s,color .2s,transform .2s}
.g-pill-green{background:var(--g-green);color:#fff}
.g-pill-green:hover{background:var(--g-green-dark)}
.g-pill-outline{background:#fff;color:var(--g-green-dark);border-color:var(--g-green)}
.g-pill-outline:hover{background:var(--g-green-soft)}
.g-header .menu-toggle{color:var(--g-red);font-size:28px;padding:4px 6px}
.g-nav{background:var(--g-red)}
.g-nav .g-wrap{display:flex;flex-wrap:wrap}
.g-nav a{color:#fff;text-decoration:none;font-size:14px;font-weight:700;text-transform:uppercase;padding:14px 15px;white-space:nowrap}
.g-nav a:first-child{padding-left:0}
.g-nav a:hover{background:var(--g-red-dark)}

/* Nút chung */
.g-btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:0 26px;border-radius:10px;font:700 15px/1 Roboto,Arial,sans-serif;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:background .2s,color .2s,transform .2s,box-shadow .2s}
.g-btn:hover{transform:translateY(-2px)}
.g-btn-red{background:var(--g-red);color:#fff;box-shadow:0 8px 18px rgba(199,33,40,.25)}
.g-btn-red:hover{background:var(--g-red-dark)}
.g-btn-line{background:#fff;color:var(--g-green-dark);border-color:var(--g-green)}
.g-btn-line:hover{background:var(--g-green-soft)}
.g-btn-white{background:#fff;color:var(--g-red)}
.g-btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.g-btn-ghost-light:hover{background:rgba(255,255,255,.12)}
.gct a:focus-visible,.gct button:focus-visible,.gct summary:focus-visible{outline:3px solid #f2b51b;outline-offset:3px}

/* Hero */
.g-hero{background:linear-gradient(180deg,#fff 0%,var(--g-bg-soft) 100%);overflow:hidden}
.g-hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;padding-top:64px;padding-bottom:72px}
.g-chip{display:inline-block;margin:0 0 18px;padding:7px 14px;border-radius:99px;background:var(--g-red-soft);color:var(--g-red);font-size:12px;font-weight:700;letter-spacing:.08em}
.g-hero h1{margin:0;color:var(--g-ink);font-size:clamp(34px,4.2vw,54px);font-weight:900;line-height:1.12}
.g-hero h1 span{color:var(--g-red)}
.g-lede{margin:20px 0 0;color:var(--g-muted);font-size:18px;line-height:1.65;max-width:560px}
.g-ticks{list-style:none;margin:24px 0 0;padding:0;display:grid;gap:10px}
.g-ticks li{position:relative;padding-left:32px;color:var(--g-text);font-size:15px;line-height:1.5}
.g-ticks li:before{content:"✓";position:absolute;left:0;top:0;width:22px;height:22px;border-radius:50%;background:var(--g-green);color:#fff;font-size:12px;font-weight:900;display:grid;place-items:center}
.g-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.g-hero-visual{position:relative;padding:24px 0 40px 24px}
.g-hero-photo{margin:0;border-radius:22px;overflow:hidden;box-shadow:0 24px 50px rgba(32,61,49,.18);border:6px solid #fff;position:relative}
.g-hero-photo img{display:block;width:100%;height:auto;aspect-ratio:4/3;object-fit:cover}
.g-hero-photo figcaption{position:absolute;left:0;right:0;bottom:0;padding:24px 16px 10px;color:#fff;font-size:12px;background:linear-gradient(transparent,rgba(0,0,0,.55))}
.g-hero-visual:before{content:"";position:absolute;right:-40px;top:-10px;width:220px;height:220px;border-radius:50%;background:var(--g-red);opacity:.1}
.g-float{position:absolute;background:#fff;border-radius:14px;box-shadow:var(--g-shadow);padding:14px 18px;font-size:13px;color:var(--g-muted)}
.g-float b{display:block;color:var(--g-ink);font-size:15px}
.g-float-top{left:0;top:0;border-left:5px solid var(--g-red)}
.g-float-bottom{right:12px;bottom:4px;display:flex;gap:12px;align-items:center;max-width:280px}
.g-float-bottom i{flex:none;width:36px;height:36px;border-radius:50%;background:var(--g-green);color:#fff;display:grid;place-items:center;font-style:normal;font-weight:900}

/* Dải điểm nổi bật */
.g-facts{background:var(--g-green-dark);color:#fff}
.g-facts-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.g-facts-grid>div{padding:26px 18px;border-left:1px solid rgba(255,255,255,.18)}
.g-facts-grid>div:first-child{border-left:0;padding-left:0}
.g-facts b{display:block;font-size:28px;font-weight:900;color:#ffe27a;line-height:1.1}
.g-facts span{display:block;margin-top:6px;font-size:13px;line-height:1.5;color:#e6f4ea}

/* Khung mục */
.g-section{padding:80px 0}
.g-soft{background:var(--g-bg-soft)}
.g-heading{text-align:center;max-width:720px;margin:0 auto 40px}
.g-heading h2{margin:0;color:var(--g-ink);font-size:clamp(28px,3vw,36px);font-weight:900;line-height:1.2}
.g-heading>p:last-child{margin:14px 0 0;color:var(--g-muted);font-size:16px;line-height:1.65}
.g-heading:after{content:"";display:block;width:64px;height:4px;border-radius:4px;background:var(--g-red);margin:22px auto 0}
.g-heading-left{text-align:left;margin-left:0}
.g-heading-left:after{margin-left:0}
.g-heading a{color:var(--g-red);font-weight:700}
.g-kicker{margin:0 0 10px;color:var(--g-red);font-size:13px;font-weight:700;letter-spacing:.12em}
.g-kicker-light{color:#ffe27a}

/* Công cụ */
.g-tools{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.g-tool{display:flex;flex-direction:column;gap:10px;padding:26px;border-radius:var(--g-radius);background:#fff;border:1px solid var(--g-line);border-top:5px solid var(--g-green);text-decoration:none;box-shadow:var(--g-shadow);transition:transform .2s,box-shadow .2s}
.g-tool-red{border-top-color:var(--g-red)}
.g-tool:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(32,61,49,.14)}
.g-tool-tag{color:var(--g-red);font-size:12px;font-weight:700;letter-spacing:.06em}
.g-tool-green .g-tool-tag{color:var(--g-green-dark)}
.g-tool strong{color:var(--g-ink);font-size:20px;line-height:1.35}
.g-tool small{color:var(--g-muted);font-size:15px;line-height:1.6}
.g-tool em{margin-top:auto;padding-top:8px;align-self:flex-start;font-style:normal;font-weight:700;font-size:14px;color:#fff;background:var(--g-green-dark);padding:10px 16px;border-radius:8px}

/* Điểm đến */
.g-dest{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.g-dest-card{display:flex;flex-direction:column;background:#fff;border-radius:var(--g-radius);overflow:hidden;border:1px solid var(--g-line);box-shadow:var(--g-shadow)}
.g-dest-art{height:170px;position:relative;overflow:hidden}
.g-dest-art img{width:100%;height:100%;object-fit:cover;display:block}
.g-art-cn{background:radial-gradient(circle at 78% 30%,#ffd84d 0 34px,transparent 35px),linear-gradient(135deg,#d7262e,#9d1218);display:flex;align-items:flex-end;padding:18px 22px}
.g-art-cn span{color:rgba(255,255,255,.92);font-size:56px;font-weight:900;letter-spacing:.08em;line-height:1}
.g-dest-body{padding:24px;display:flex;flex-direction:column;flex:1}
.g-dest-body h3{margin:4px 0 10px;color:var(--g-ink);font-size:21px}
.g-dest-body>p:not(.g-tag){margin:0 0 18px;color:var(--g-muted);font-size:15px;line-height:1.6}
.g-dest-body a{margin-top:auto;color:var(--g-red);font-weight:700;font-size:15px;text-decoration:none}
.g-dest-body a:hover{text-decoration:underline}
.g-tag{margin:0;display:inline-block;align-self:flex-start;padding:4px 10px;border-radius:6px;background:var(--g-green-soft);color:var(--g-green-dark);font-size:12px;font-weight:700;letter-spacing:.06em}
.g-scholar{background:linear-gradient(160deg,var(--g-green-dark),#0d5c31);border:0}
.g-scholar h3{color:#fff}
.g-scholar .g-dest-body>p:not(.g-tag){color:#dcefe2}
.g-scholar .g-dest-body a{color:#ffe27a}
.g-tag-light{background:rgba(255,255,255,.15);color:#fff}
.g-chips{list-style:none;margin:0 0 22px;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.g-chips li{padding:7px 12px;border-radius:99px;background:#fff;color:var(--g-green-dark);font-size:13px;font-weight:700}

/* Tìm trường: dùng lại markup của public-catalog.js */
.gct .public-catalog{max-width:1175px;padding:80px 24px}
.gct .public-search{background:#fff;border:1px solid var(--g-line);border-radius:var(--g-radius);box-shadow:var(--g-shadow);padding:22px}
.gct .public-search label{color:var(--g-ink);font-size:13px}
.gct .public-search input,.gct .public-search select{border-radius:8px;border-color:#cfdcd3;font-family:inherit;font-size:15px}
.gct .public-search .btn-primary{background:var(--g-red);border-radius:8px;font-size:15px}
.gct .public-search .btn-primary:hover{background:var(--g-red-dark)}
.gct #public-results>p{color:var(--g-muted)}
.gct .public-school{border-radius:12px;border-top-color:var(--g-green);box-shadow:var(--g-shadow)}
.gct .public-school h3{color:var(--g-ink)}
.gct .public-school a{color:var(--g-red)}
.gct .public-catalog-note,.gct .public-empty{font-size:13px}

/* Về GCT */
.g-about{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:center}
.g-about-photo{margin:0;border-radius:20px;overflow:hidden;box-shadow:0 20px 44px rgba(32,61,49,.16);background:#fff}
.g-about-photo img{display:block;width:100%;height:auto}
.g-about-photo figcaption{padding:12px 16px;font-size:13px;color:var(--g-muted)}
.g-about-copy h2{margin:0;color:var(--g-ink);font-size:clamp(28px,3vw,36px);font-weight:900;line-height:1.2}
.g-about-copy h2 span{color:var(--g-red)}
.g-about-copy>p:not(.g-kicker){margin:16px 0 26px;color:var(--g-muted);line-height:1.7}
.g-reasons{display:grid;gap:14px}
.g-reasons article{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--g-line);border-radius:12px;padding:16px 18px}
.g-reasons span{flex:none;width:42px;height:42px;border-radius:10px;background:var(--g-red);color:#fff;font-weight:900;display:grid;place-items:center}
.g-reasons h3{margin:0 0 4px;color:var(--g-ink);font-size:17px}
.g-reasons p{margin:0;color:var(--g-muted);font-size:14px;line-height:1.6}

/* Lộ trình */
.g-steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:none;position:relative}
.g-steps:before{content:"";position:absolute;left:12%;right:12%;top:30px;height:3px;background:repeating-linear-gradient(90deg,var(--g-green) 0 10px,transparent 10px 18px)}
.g-steps li{position:relative;text-align:center;padding:0 8px}
.g-steps span{position:relative;display:grid;place-items:center;margin:0 auto 16px;width:62px;height:62px;border-radius:50%;background:#fff;border:3px solid var(--g-green);color:var(--g-green-dark);font-size:20px;font-weight:900}
.g-steps li:nth-child(even) span{border-color:var(--g-red);color:var(--g-red)}
.g-steps h3{margin:0 0 8px;color:var(--g-ink);font-size:18px}
.g-steps p{margin:0;color:var(--g-muted);font-size:14px;line-height:1.6}

/* Khu vực hồ sơ học viên */
.gct .portal{background:var(--g-bg-soft);padding-top:88px;padding-bottom:88px}
.gct .portal .eyebrow{color:var(--g-red);font-family:Roboto,Arial,sans-serif;font-weight:700;letter-spacing:.12em}
.gct .portal-title h2{color:var(--g-ink);font-family:Roboto,Arial,sans-serif;font-weight:900}
.gct .portal-title h2 em{color:var(--g-red)}
.gct .portal-title .demo-tag{background:var(--g-green);color:#fff;border-radius:99px;padding:8px 14px;font-weight:700}
.gct #portal-app{background:#fff;border-radius:var(--g-radius);box-shadow:var(--g-shadow)}
.gct .portal-empty .btn-primary{background:var(--g-red);border-radius:99px;padding:13px 28px;font-size:15px}

/* Hỏi đáp */
.g-faq-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px;align-items:start}
.g-faq{display:grid;gap:12px}
.g-faq details{background:#fff;border:1px solid var(--g-line);border-radius:12px;padding:0 20px;box-shadow:0 4px 14px rgba(32,61,49,.04)}
.g-faq details[open]{border-color:#bfe0c9}
.g-faq summary{cursor:pointer;list-style:none;padding:18px 32px 18px 0;color:var(--g-ink);font-weight:700;font-size:16px;position:relative}
.g-faq summary::-webkit-details-marker{display:none}
.g-faq summary:after{content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);width:26px;height:26px;border-radius:50%;background:var(--g-green-soft);color:var(--g-green-dark);display:grid;place-items:center;font-size:18px}
.g-faq details[open] summary:after{content:"−";background:var(--g-red);color:#fff}
.g-faq details p{margin:0 0 18px;color:var(--g-muted);line-height:1.7}
.g-faq a{color:var(--g-red);font-weight:700}

/* Kêu gọi hành động */
.g-cta{background:linear-gradient(120deg,var(--g-red),#9e141b);color:#fff;padding:64px 0}
.g-cta-row{display:flex;justify-content:space-between;align-items:center;gap:32px}
.g-cta h2{margin:0;font-size:clamp(24px,2.6vw,32px);font-weight:900;line-height:1.25;max-width:640px}
.g-cta p:not(.g-kicker){margin:12px 0 0;color:#ffe4e4}
.g-cta-actions{display:flex;flex-wrap:wrap;gap:12px;flex:none}

/* Chân trang */
.g-footer{display:block;max-width:none;margin:0;background:#2b2f2d;color:#d7dbd8;padding:56px 0 0}
.g-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}
.g-brand-light{background:#fff;border-radius:12px;padding:6px 14px 6px 6px;display:inline-flex}
.g-footer p{margin:16px 0 0;font-size:14px;line-height:1.9;color:#c9cfcb}
.g-footer h3{margin:0;color:#fff;font-size:14px;letter-spacing:.08em}
.g-footer a{color:#e8ece9;text-decoration:none}
.g-footer p a:hover{color:#fff;text-decoration:underline}
.g-footer-copy{margin-top:40px;padding-top:18px;padding-bottom:22px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#a9b0ab}

/* Nút liên hệ nổi */
.g-floating{position:fixed;right:18px;bottom:18px;z-index:35;display:grid;gap:10px;justify-items:end}
.g-fab{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:54px;height:54px;padding:0 16px;border-radius:99px;color:#fff;font-weight:900;font-size:14px;text-decoration:none;box-shadow:0 8px 20px rgba(0,0,0,.22);transition:transform .2s}
.g-fab:hover{transform:scale(1.05)}
.g-fab-zalo{background:#0068ff}
.g-fab-call{background:var(--g-green)}
.g-fab-call span{font-size:14px}

/* Hộp đăng ký tư vấn */
.gct .modal-card{border-radius:18px;border-top:6px solid var(--g-red);background:#fff}
.gct .modal-card h2{font-family:Roboto,Arial,sans-serif;font-weight:900;color:var(--g-ink);font-size:28px}
.gct .modal .btn-primary{background:var(--g-green);border-radius:99px;font-size:15px}
.gct .modal .btn-primary:hover{background:var(--g-green-dark)}

@media (max-width:1000px){
  .g-hero-grid,.g-about,.g-faq-wrap{grid-template-columns:1fr}
  .g-hero-grid{gap:36px;padding-top:44px}
  .g-hero-visual{max-width:620px}
  .g-tools,.g-dest{grid-template-columns:1fr 1fr}
  .g-scholar{grid-column:1/-1}
  .g-steps{grid-template-columns:1fr 1fr;row-gap:34px}
  .g-steps:before{display:none}
  .g-cta-row{flex-direction:column;align-items:flex-start}
}
@media (max-width:800px){
  .g-topbar .g-wrap>span:first-child,.g-topbar-links>span,.g-topbar-links a[href^="mailto"]{display:none}
  .g-topbar .g-wrap{justify-content:center}
  .g-header-row{min-height:68px;gap:10px}
  .g-brand img{width:70px;height:44px}
  .g-brand b{font-size:14px}.g-brand small{font-size:10px}
  .g-header-actions .g-pill{display:none}
  .g-nav{display:none}
  .g-nav.open{display:block}
  .g-nav .g-wrap{flex-direction:column;padding-top:6px;padding-bottom:10px}
  .g-nav a,.g-nav a:first-child{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.15)}
  .g-section,.gct .public-catalog{padding-top:60px;padding-bottom:60px}
  .g-facts-grid{grid-template-columns:1fr 1fr}
  .g-facts-grid>div{padding:20px 14px;border-left:0;border-top:1px solid rgba(255,255,255,.18)}
  .g-facts-grid>div:nth-child(-n+2){border-top:0}
  .g-facts-grid>div:nth-child(odd){padding-left:0}
  .g-tools,.g-dest{grid-template-columns:1fr}
  .g-footer-grid{grid-template-columns:1fr;gap:28px}
  .g-fab-call span{display:none}
  .g-floating{right:12px;bottom:12px;gap:8px}
  .g-fab{min-width:46px;height:46px;padding:0 12px;font-size:13px}
}
@media (max-width:480px){
  .g-wrap{padding:0 16px}
  .gct .public-catalog{padding-left:16px;padding-right:16px}
  .g-hero-visual{padding:16px 0 56px}
  .g-float-top{position:relative;display:inline-block;margin-bottom:12px}
  .g-hero-visual:before{display:none}
  .g-float-bottom{left:12px;right:12px;max-width:none}
  .g-hero-actions .g-btn{width:100%}
  .g-steps{grid-template-columns:1fr}
  .g-cta-actions,.g-cta-actions .g-btn{width:100%}
  .g-facts b{font-size:22px}
}
.gct .case-admin{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap;margin:12px 0}
.gct .case-admin label{flex:1;min-width:180px}
.gct .detail-head{flex-wrap:wrap}
.gct .detail-head .case-admin{flex-basis:100%}