/* =============================================================
   QUYỀN CHẠY BỘ — style.css
   Tổ chức: 1.Tokens 2.Reset 3.Base 4.Layout 5.Components
            6.Header/Nav 7.Sections 8.Footer 9.Utilities
            10.Animations 11.Responsive
============================================================= */

/* Font MONTSERRAT (giống long.vn) — nạp cho MỌI trang dùng style.css, kể cả các bài blog */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800&display=swap');

/* ============ 1. DESIGN TOKENS ============ */
:root {
  /* Màu thương hiệu */
  --c-orange: #FF5A1F;
  --c-orange-dark: #E64A12;
  --c-orange-soft: #FFF1EB;
  --c-ink: #0F0F12;
  --c-ink-2: #1A1A1F;
  --c-white: #FFFFFF;
  --c-grey-50: #FAFAFA;
  --c-grey-100: #F1F1F3;
  --c-grey-200: #E5E5E9;
  --c-grey-500: #6B6B73;
  --c-grey-700: #3A3A40;

  /* Typography */
  --font: "Montserrat", "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* Bo góc */
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  /* Bóng */
  --shadow-sm: 0 4px 14px -6px rgba(15, 15, 18, .12);
  --shadow: 0 20px 50px -20px rgba(15, 15, 18, .18);
  --shadow-orange: 0 12px 30px -8px rgba(255, 90, 31, .45);

  /* Layout */
  --container: 1200px;
  --gutter: clamp(20px, 5vw, 40px);
  --section-y: clamp(64px, 10vw, 130px);

  /* Motion */
  --ease: cubic-bezier(.22, 1, .36, 1);
  --t-fast: .2s;
  --t: .4s;
}

/* ============ 2. RESET ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
/* Header cố định không che đầu section khi nhảy tới anchor (#about, #journeys...) */
section[id], [id].section, .anchor-offset { scroll-margin-top: 84px; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input { font: inherit; }
:focus-visible { outline: 3px solid var(--c-orange); outline-offset: 2px; border-radius: 4px; }

/* ============ 3. BASE ============ */
body {
  font-family: var(--font);
  color: var(--c-ink);
  background: var(--c-white);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
h1, h2, h3 { line-height: 1.15; font-weight: 800; letter-spacing: -0.02em; }
/* IN HOA TẤT CẢ TIÊU ĐỀ */
h1, h2, h3 { text-transform: uppercase; letter-spacing: 0; }

/* ============ 4. LAYOUT ============ */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section-y); position: relative; border-top: 1px solid rgba(255, 255, 255, .07); }
.section--soft { background: var(--c-grey-50); }
.section--dark { background: var(--c-ink); color: var(--c-white); }

.section__head { max-width: 680px; margin: 0 auto clamp(36px, 6vw, 64px); text-align: center; }
.section__title { font-size: clamp(1.9rem, 4.5vw, 3rem); }
.section__title--light { color: var(--c-white); }
.section__lead { margin-top: 14px; color: var(--c-grey-500); font-size: 1.075rem; }
.section__lead--light { color: rgba(255, 255, 255, .72); }

.eyebrow {
  display: inline-block; font-size: .82rem; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--c-orange); margin-bottom: 14px;
}
.eyebrow--light { color: var(--c-orange); }

.grid { display: grid; gap: clamp(18px, 2.5vw, 28px); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.text-orange { color: var(--c-orange); }
.anchor-offset { position: absolute; top: -90px; }

/* ============ 5. BUTTONS ============ */
.btn {
  --btn-bg: var(--c-orange); --btn-fg: #fff;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--btn-bg); color: var(--btn-fg);
  font-weight: 700; padding: 14px 26px; border-radius: 4px;
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t) var(--ease), background var(--t-fast);
  will-change: transform;
}
.btn--primary { box-shadow: var(--shadow-orange); }
.btn--primary:hover { background: var(--c-orange-dark); transform: translateY(-3px); }
.btn--dark { --btn-bg: var(--c-ink); }
.btn--dark:hover { transform: translateY(-3px); background: #000; }
.btn--ghost { --btn-bg: transparent; --btn-fg: #fff; border: 2px solid rgba(255, 255, 255, .55); }
.btn--ghost:hover { background: rgba(255, 255, 255, .12); border-color: #fff; transform: translateY(-3px); }
.btn--lg { padding: 17px 34px; font-size: 1.05rem; }
.btn--sm { padding: 11px 20px; font-size: .92rem; }
.btn--block { width: 100%; }

/* ============ 6. HEADER / NAV (STICKY) ============ */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background var(--t), box-shadow var(--t), padding var(--t);
  padding-block: 16px;
}
.header__inner { display: flex; align-items: center; justify-content: center; gap: 20px; }
.header.is-scrolled {
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(12px);
  box-shadow: var(--shadow-sm); padding-block: 10px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; color: #fff; }
.header.is-scrolled .brand { color: var(--c-ink); }
.brand__mark {
  display: grid; place-items: center; width: 38px; height: 38px;
  background: var(--c-orange); color: #fff; border-radius: 12px; box-shadow: var(--shadow-orange);
}
.brand--light { color: #fff; }

.nav { margin-left: 44px; }
.nav__list { display: flex; gap: 30px; }
.nav__link {
  position: relative; font-weight: 600; text-transform: uppercase; letter-spacing: .09em; color: rgba(255, 255, 255, .9); font-size: .82rem; padding: 4px 0;
}
.header.is-scrolled .nav__link { color: var(--c-grey-700); }
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--c-orange); transition: width var(--t) var(--ease);
}
.nav__link:hover::after, .nav__link.is-active::after { width: 100%; }
.nav__link:hover { color: var(--c-orange); }

.header__cta { flex-shrink: 0; }
.header.is-scrolled .header__cta { box-shadow: var(--shadow-orange); }

/* Nút hamburger */
.nav-toggle { display: none; width: 44px; height: 44px; flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
.nav-toggle span { width: 24px; height: 2.5px; background: #fff; border-radius: 2px; transition: transform var(--t), opacity var(--t); }
.header.is-scrolled .nav-toggle span { background: var(--c-ink); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ============ 7a. HERO ============ */
.hero {
  position: relative; min-height: 100svh; display: flex; align-items: center;
  color: #fff; overflow: hidden; isolation: isolate;
}
.hero__video {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: -2;
}
.hero__overlay {
  position: absolute; inset: 0; z-index: -1;
  background:
    /* Tối đậm bên trái (vùng chữ) → nhạt dần sang phải để chữ nổi rõ */
    linear-gradient(90deg, rgba(8, 8, 10, .9) 0%, rgba(8, 8, 10, .7) 42%, rgba(8, 8, 10, .3) 100%),
    /* Lớp tối theo chiều dọc */
    linear-gradient(180deg, rgba(12, 12, 15, .55) 0%, rgba(12, 12, 15, .4) 45%, rgba(12, 12, 15, .85) 100%),
    /* Vệt sáng cam dời sang PHẢI (sau lưng runner), không nằm dưới chữ */
    radial-gradient(60% 55% at 88% 32%, rgba(255, 90, 31, .28), transparent 62%);
}
.hero__content { max-width: 820px; padding-top: 80px; }
.hero__eyebrow {
  display: inline-block; padding: 8px 16px; border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, .12); backdrop-filter: blur(6px);
  font-size: .85rem; font-weight: 600; letter-spacing: .04em; margin-bottom: 22px;
  border: 1px solid rgba(255, 255, 255, .18);
}
.hero__title { font-size: clamp(2rem, 5.4vw, 3.9rem); font-weight: 800; text-shadow: 0 2px 28px rgba(0, 0, 0, .55); }
/* Ép tựa đúng 2 dòng: mỗi cụm 1 dòng, không rớt chữ lẻ */
.hero__title-line { display: block; white-space: nowrap; }
/* Tương phản kiểu long.vn: tiêu đề đậm 800 cạnh mô tả mảnh 300 → sang, dứt khoát */
.hero__desc { font-weight: 300; }
.section__lead { font-weight: 300; }
.hero__title .text-orange { text-shadow: 0 2px 22px rgba(0, 0, 0, .7); } /* chữ cam nổi rõ trên nền tối */
.hero__desc { margin-top: 22px; font-size: clamp(1.05rem, 2vw, 1.3rem); max-width: 620px; color: rgba(255, 255, 255, .92); text-shadow: 0 1px 14px rgba(0, 0, 0, .6); }
.hero__actions { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 16px; }

.hero__scroll {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 2;
  width: 26px; height: 42px; border: 2px solid rgba(255, 255, 255, .6); border-radius: 14px;
  display: grid; place-items: start center; padding-top: 7px;
}
.hero__scroll span { width: 4px; height: 8px; background: #fff; border-radius: 2px; animation: scrollDot 1.6s infinite; }
@keyframes scrollDot { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 80%, 100% { opacity: 0; transform: translateY(12px); } }

/* ============ 7b. ABOUT ============ */
.about__grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
.about__media { position: relative; }
.about__media img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow); object-fit: cover; }
.about__badge {
  position: absolute; right: -14px; bottom: 28px;
  background: var(--c-orange); color: #fff; padding: 16px 22px; border-radius: var(--radius);
  box-shadow: var(--shadow-orange); display: grid; line-height: 1.2;
}
.about__badge strong { font-size: 1.5rem; }
.about__badge span { font-size: .8rem; opacity: .9; }
.about__body p { color: var(--c-grey-700); margin-top: 8px; }
.about__points { margin: 24px 0 30px; display: grid; gap: 14px; }
.about__points li { display: flex; gap: 12px; align-items: flex-start; color: var(--c-grey-700); }
.dot { flex-shrink: 0; width: 10px; height: 10px; margin-top: 9px; border-radius: 50%; background: var(--c-orange); }

/* ============ 7c. CARDS (chung) ============ */
.card {
  background: #fff; border: 1px solid var(--c-grey-200); border-radius: var(--radius-lg);
  padding: 30px; transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease), border-color var(--t);
  will-change: transform;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.card__title { font-size: 1.2rem; font-weight: 700; }
.card__icon {
  display: grid; place-items: center; width: 56px; height: 56px; margin-bottom: 18px;
  background: var(--c-orange-soft); color: var(--c-orange); border-radius: 16px;
}
.card__icon svg { width: 28px; height: 28px; }
.card--benefit p { margin-top: 10px; color: var(--c-grey-500); font-size: .96rem; }

/* Journey cards */
.card--journey { position: relative; overflow: hidden; padding-top: 34px; }
.card--journey::before { content: ""; position: absolute; inset: 0 auto auto 0; width: 100%; height: 6px; background: var(--accent, var(--c-orange)); }
.card__tag {
  display: inline-block; font-size: .76rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent, var(--c-orange)); background: color-mix(in srgb, var(--accent, var(--c-orange)) 12%, #fff);
  padding: 5px 12px; border-radius: var(--radius-pill); margin-bottom: 14px;
}
.card--journey p { margin: 8px 0 20px; color: var(--c-grey-500); font-size: .96rem; }
.card__link { font-weight: 700; color: var(--c-orange); display: inline-flex; gap: 6px; align-items: center; }
.card__link span { transition: transform var(--t-fast) var(--ease); }
.card__link:hover span { transform: translateX(5px); }

.card--cta-journey { background: var(--c-ink); color: #fff; border-color: transparent; display: flex; flex-direction: column; justify-content: center; }
.card--cta-journey p { color: rgba(255, 255, 255, .7); margin: 10px 0 20px; font-size: .96rem; }

/* Blog cards */
.card--post { padding: 0; overflow: hidden; border: 1px solid rgba(255,255,255,.1); border-radius: 16px; }
.card__thumb { position: relative; display: block; aspect-ratio: 4/3; overflow: hidden; }
.card__thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.card--post:hover .card__thumb img { transform: scale(1.06); }
.card__cat {
  position: absolute; top: 14px; left: 14px; background: rgba(15, 15, 18, .78); color: #fff;
  font-size: .74rem; font-weight: 600; padding: 5px 12px; border-radius: var(--radius-pill); backdrop-filter: blur(4px);
}
.card__content { padding: 22px 24px 26px; }
.card__content p { margin: 8px 0 16px; color: var(--c-grey-500); font-size: .94rem; }

/* ---- Blog section: tiêu đề trái + nút "Xem tất cả" phải (mẫu long.vn) ---- */
.blog__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px 32px; flex-wrap: wrap; margin-bottom: clamp(30px, 5vw, 52px); }
.blog__head-text { text-align: left; }
.blog__head-text .eyebrow { display: block; }
.blog__head-text .section__title { text-align: left; margin: 4px 0 0; }
.blog__viewall {
  flex: none; display: inline-flex; align-items: center; gap: 8px;
  font-size: .78rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase;
  color: var(--c-text); border: 1.5px solid var(--c-line); border-radius: 4px;
  padding: 12px 22px; transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.blog__viewall span { transition: transform var(--t-fast) var(--ease); }
.blog__viewall:hover { background: var(--c-orange); border-color: var(--c-orange); color: #fff; transform: translateY(-2px); }
.blog__viewall:hover span { transform: translateX(4px); }

/* ---- Thẻ blog: KHUNG VIỀN như "Bài viết liên quan" (anh chọn mẫu này) ---- */
.blog__grid .card--post {
  background: #131318;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 4px;
  box-shadow: none;
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.blog__grid .card--post:hover { border-color: rgba(255, 90, 31, .5); transform: translateY(-4px); box-shadow: none; }
.blog__grid .card__thumb { aspect-ratio: 16 / 10; }
.blog__grid .card__content { text-align: center; padding: 22px 20px 26px; }
.card__meta { font-size: .74rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--c-orange); margin-bottom: 12px; }
.card__meta span { color: var(--c-orange); margin: 0 4px; }
.blog__grid .card__title { font-size: 1.02rem; line-height: 1.4; text-transform: uppercase; font-weight: 800; text-wrap: balance; }
.blog__grid .card__title a { color: #F2F2F5; }
.blog__grid .card--post:hover .card__title a { color: var(--c-orange); }
.blog__grid .card__link { margin-top: 16px; justify-content: center; color: rgba(255, 255, 255, .5); font-size: .76rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; }
.blog__grid .card--post:hover .card__link { color: var(--c-orange); }

/* ============ 7d. ACHIEVEMENTS (timeline) ============ */
.achievements__grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 72px); align-items: start; }
@keyframes pulse { 0% { transform: scale(1); opacity: 1; } 100% { transform: scale(1.5); opacity: 0; } }

.timeline { position: relative; padding-left: 8px; display: grid; gap: 8px; }
.timeline__item { position: relative; display: flex; gap: 18px; padding: 18px 0 18px 28px; border-left: 2px solid rgba(255, 255, 255, .14); }
.timeline__item:last-child { border-left-color: transparent; }
.timeline__medal {
  position: absolute; left: -19px; top: 16px; width: 36px; height: 36px; display: grid; place-items: center;
  background: var(--c-ink-2); border: 2px solid var(--c-orange); border-radius: 50%; font-size: 1rem;
}
.timeline__year { display: inline-block; color: var(--c-orange); font-weight: 700; font-size: .85rem; letter-spacing: .06em; }
.timeline__body h3 { font-size: 1.12rem; margin-top: 2px; }
.timeline__body p { color: rgba(255, 255, 255, .65); font-size: .92rem; margin-top: 4px; }

/* ============ 7e. LEAD MAGNET ============ */
.lead { background: linear-gradient(135deg, var(--c-orange-soft), #fff 70%); }
.lead__grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px, 6vw, 72px); align-items: center; }
.lead__list { margin-top: 22px; display: grid; gap: 14px; }
.lead__list li { display: flex; gap: 12px; align-items: center; font-weight: 500; }
.check { flex-shrink: 0; width: 26px; height: 26px; display: grid; place-items: center; background: var(--c-orange); color: #fff; border-radius: 50%; font-size: .8rem; font-weight: 700; }

.lead__form { background: #fff; padding: clamp(26px, 4vw, 40px); border-radius: var(--radius-lg); box-shadow: var(--shadow); border: 1px solid var(--c-grey-200); }
.lead__form-title { font-size: 1.25rem; margin-bottom: 20px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 7px; }
.field input {
  width: 100%; padding: 14px 16px; border: 1.5px solid var(--c-grey-200); border-radius: var(--radius-sm);
  background: var(--c-grey-50); transition: border-color var(--t-fast), background var(--t-fast);
}
.field input:focus { border-color: var(--c-orange); background: #fff; outline: none; }
.field input.is-invalid { border-color: #E03131; background: #fff5f5; }
.field__error { display: block; color: #E03131; font-size: .82rem; margin-top: 5px; min-height: 1em; }
.lead__note { text-align: center; font-size: .84rem; color: var(--c-grey-500); margin-top: 14px; }
.lead__success { margin-top: 14px; text-align: center; font-weight: 600; color: var(--c-orange); background: var(--c-orange-soft); padding: 12px; border-radius: var(--radius-sm); }
.lead__error { margin-top: 14px; text-align: center; font-weight: 600; color: #C92A2A; background: #FFF0F0; padding: 12px; border-radius: var(--radius-sm); }

/* ============ 7f. SOCIAL ============ */
.social__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(16px, 2.5vw, 24px); }
.social__card {
  display: flex; flex-direction: column; align-items: center; gap: 14px; padding: 34px 20px;
  background: #fff; border: 1px solid var(--c-grey-200); border-radius: var(--radius-lg); font-weight: 700;
  transition: transform var(--t) var(--ease), box-shadow var(--t), color var(--t);
}
.social__card svg { width: 38px; height: 38px; color: var(--c-grey-700); transition: color var(--t); }
.social__card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.social__card--fb:hover { color: #1877F2; } .social__card--fb:hover svg { color: #1877F2; }
.social__card--tt:hover { color: #000; } .social__card--tt:hover svg { color: #000; }
.social__card--ig:hover { color: #E1306C; } .social__card--ig:hover svg { color: #E1306C; }
.social__card--yt:hover { color: #FF0000; } .social__card--yt:hover svg { color: #FF0000; }

/* ============ 7g. FINAL CTA ============ */
.final-cta { background: var(--c-ink); color: #fff; text-align: center; overflow: hidden; }
.final-cta::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(60% 80% at 50% 0%, rgba(255, 90, 31, .35), transparent 60%);
}
.final-cta__inner { position: relative; z-index: 1; max-width: 720px; margin-inline: auto; }
.final-cta__title { font-size: clamp(2rem, 5vw, 3.4rem); }
.final-cta__desc { margin: 18px 0 32px; color: rgba(255, 255, 255, .75); font-size: 1.1rem; }

/* ============ 8. FOOTER ============ */
.footer { background: #08080A; color: rgba(255, 255, 255, .7); padding-top: clamp(50px, 8vw, 80px); }
.footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 44px; }
.footer__tagline { margin-top: 14px; max-width: 260px; font-size: .95rem; }
.footer__heading { color: #fff; font-size: 1rem; margin-bottom: 16px; }
.footer__col ul { display: grid; gap: 10px; }
.footer__col a { font-size: .94rem; transition: color var(--t-fast); }
.footer__col a:hover { color: var(--c-orange); }
.footer__social { display: flex; gap: 12px; }
.footer__social a { width: 40px; height: 40px; display: grid; place-items: center; background: rgba(255, 255, 255, .08); border-radius: 50%; transition: background var(--t-fast), transform var(--t-fast); }
.footer__social svg { width: 18px; height: 18px; }
.footer__social a:hover { background: var(--c-orange); transform: translateY(-3px); }
.footer__bottom { border-top: 1px solid rgba(255, 255, 255, .1); padding-block: 22px; }
.footer__bottom-inner { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: .86rem; }

/* ============ 9. PRELOADER / BACK TO TOP / SKIP LINK ============ */
.preloader { position: fixed; inset: 0; z-index: 9999; background: var(--c-ink); display: grid; place-items: center; transition: opacity .5s var(--ease), visibility .5s; }
.preloader.is-hidden { opacity: 0; visibility: hidden; }
.preloader__logo { display: flex; align-items: center; gap: 12px; color: #fff; font-weight: 800; font-size: 1.3rem; }
.preloader__dot { width: 16px; height: 16px; border-radius: 50%; background: var(--c-orange); animation: bounce .9s infinite var(--ease); }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

.back-to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 90; width: 50px; height: 50px;
  background: var(--c-orange); color: #fff; border-radius: 50%; display: grid; place-items: center;
  box-shadow: var(--shadow-orange); opacity: 0; visibility: hidden; transform: translateY(16px);
  transition: opacity var(--t), visibility var(--t), transform var(--t) var(--ease), background var(--t-fast);
}
.back-to-top svg { width: 22px; height: 22px; }
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--c-orange-dark); transform: translateY(-3px); }

/* Nút chat Zalo nổi (góc phải, trên nút back-to-top) */
.zalo-btn {
  position: fixed; right: 22px; bottom: 84px; z-index: 95;
  width: 56px; height: 56px; border-radius: 50%;
  background: #0068FF; color: #fff;
  display: grid; place-items: center; text-align: center;
  font-weight: 800; font-size: .82rem; letter-spacing: .01em;
  box-shadow: 0 10px 24px -6px rgba(0, 104, 255, .55);
  transition: transform var(--t-fast) var(--ease);
}
.zalo-btn:hover { transform: scale(1.08); color: #fff; }
.zalo-btn::after {
  content: ""; position: absolute; inset: -6px; border-radius: 50%;
  border: 2px solid rgba(0, 104, 255, .45); animation: pulse 2s infinite;
}
@media (max-width: 560px) { .zalo-btn { width: 50px; height: 50px; bottom: 78px; font-size: .76rem; } }

.skip-link { position: absolute; left: -999px; top: 8px; z-index: 9999; background: #fff; color: var(--c-ink); padding: 10px 18px; border-radius: var(--radius-sm); font-weight: 700; }
.skip-link:focus { left: 8px; }

/* ============ 10. ANIMATIONS (reveal on scroll) ============ */
/* Chỉ ẩn để animate KHI có JS (.js thêm bởi inline script trong <head>).
   Không có JS → .reveal vẫn hiển thị bình thường, trang không bao giờ trắng. */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }

/* ============ 11. RESPONSIVE ============ */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .about__grid { grid-template-columns: 1fr; }
  .about__media { max-width: 460px; }
  .achievements__grid, .lead__grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .header__inner { justify-content: space-between; }
  .header__cta { display: none; }
  .nav-toggle { display: flex; }

  /* Menu mobile dạng panel trượt */
  .nav {
    position: fixed; inset: 0 0 0 auto; width: min(82vw, 340px);
    background: #fff; box-shadow: -10px 0 40px rgba(0, 0, 0, .15);
    transform: translateX(100%); transition: transform var(--t) var(--ease);
    padding: 90px 30px 30px; margin: 0;
  }
  .nav.is-open { transform: translateX(0); }
  .nav__list { flex-direction: column; gap: 4px; }
  .nav__link { display: block; color: var(--c-ink); font-size: 1.1rem; padding: 12px 0; border-bottom: 1px solid var(--c-grey-100); }
  body.nav-open { overflow: hidden; }
  body.nav-open::after { content: ""; position: fixed; inset: 0; background: rgba(0, 0, 0, .45); z-index: 99; }
}

@media (max-width: 560px) {
  .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .social__grid { grid-template-columns: repeat(2, 1fr); }
  .hero__actions .btn { width: 100%; }
  .about__badge { right: 12px; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

/* ============ 12. REDUCED MOTION ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

/* =============================================================
   13. TRANG BÀI VIẾT BLOG (article)
============================================================= */
.post-hero {
  position: relative; padding-top: clamp(120px, 16vw, 170px); padding-bottom: clamp(40px, 6vw, 70px);
  background: var(--c-ink); color: #fff; overflow: hidden;
}
.post-hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(70% 90% at 80% 0%, rgba(255,90,31,.3), transparent 60%); }
.post-hero__inner { position: relative; z-index: 1; max-width: 800px; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; font-size: .86rem; color: rgba(255,255,255,.6); margin-bottom: 18px; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: rgba(255,255,255,.35); }
.post-cat { display: inline-block; background: var(--c-orange); color: #fff; font-size: .78rem; font-weight: 700; padding: 5px 14px; border-radius: var(--radius-pill); margin-bottom: 16px; }
.post-hero__title { font-size: clamp(1.9rem, 4.5vw, 3rem); }
.post-meta { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 16px; color: rgba(255,255,255,.7); font-size: .9rem; }
.post-meta strong { color: #fff; }

.post-body { max-width: 760px; margin-inline: auto; padding-block: clamp(40px, 7vw, 72px); }
.post-cover { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow); margin-bottom: clamp(28px, 5vw, 44px); }
.post-content { font-size: 1.075rem; color: var(--c-grey-700); }
.post-content > p { margin-bottom: 22px; }
.post-content h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); color: var(--c-ink); margin: 38px 0 16px; }
.post-content h3 { font-size: 1.2rem; color: var(--c-ink); margin: 28px 0 12px; }
.post-content ul, .post-content ol { margin: 0 0 22px 0; padding-left: 22px; }
.post-content li { margin-bottom: 10px; }
.post-content ul li { list-style: none; position: relative; padding-left: 26px; }
.post-content ul li::before { content: ""; position: absolute; left: 0; top: 10px; width: 9px; height: 9px; border-radius: 50%; background: var(--c-orange); }
.post-content ol { list-style: decimal; padding-left: 24px; }
.post-content strong { color: var(--c-ink); }
.post-content a { color: var(--c-orange); text-decoration: underline; text-underline-offset: 3px; }
.post-content blockquote {
  margin: 28px 0; padding: 18px 24px; border-left: 4px solid var(--c-orange);
  background: var(--c-orange-soft); border-radius: 0 var(--radius) var(--radius) 0; font-weight: 500; color: var(--c-ink);
}
.post-callout { background: var(--c-grey-50); border: 1px solid var(--c-grey-200); border-radius: var(--radius); padding: 22px 24px; margin: 28px 0; }
.post-callout h3 { margin-top: 0; }

/* CTA cuối bài → đẩy về lead magnet */
.post-cta { margin-top: 44px; padding: clamp(28px, 5vw, 44px); text-align: center; background: var(--c-ink); color: #fff; border-radius: var(--radius-lg); }
.post-cta h2 { color: #fff; font-size: clamp(1.4rem, 3vw, 1.9rem); margin-bottom: 10px; }
.post-cta p { color: rgba(255,255,255,.72); margin-bottom: 22px; }

/* Điều hướng cuối bài + bài liên quan */
.post-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 36px; flex-wrap: wrap; }
.post-related { padding-bottom: clamp(50px, 8vw, 90px); }
.post-related h2 { text-align: center; margin-bottom: 30px; font-size: clamp(1.5rem, 3vw, 2rem); }

/* =============================================================
   14. MODAL CHÚC MỪNG (success popup)
============================================================= */
.modal { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 20px; }
.modal[hidden] { display: none; }
.modal__overlay { position: absolute; inset: 0; background: rgba(15, 15, 18, .72); backdrop-filter: blur(4px); animation: modalFade .3s var(--ease); }
.modal__card {
  position: relative; z-index: 1; width: 100%; max-width: 460px; max-height: 92vh; overflow-y: auto;
  background: #fff; border-radius: var(--radius-lg); padding: clamp(28px, 5vw, 44px) clamp(22px, 4vw, 38px);
  text-align: center; box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .5);
  border-top: 6px solid var(--c-orange);
  animation: modalPop .45s var(--ease);
}
@keyframes modalFade { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalPop { from { opacity: 0; transform: translateY(20px) scale(.96); } to { opacity: 1; transform: none; } }

.modal__close { position: absolute; top: 14px; right: 16px; width: 36px; height: 36px; border-radius: 50%; font-size: 1.6rem; line-height: 1; color: var(--c-grey-500); transition: background var(--t-fast), color var(--t-fast); }
.modal__close:hover { background: var(--c-grey-100); color: var(--c-ink); }

.modal__icon { display: grid; place-items: center; width: 84px; height: 84px; margin: 4px auto 18px; border-radius: 50%; background: var(--c-orange); color: #fff; box-shadow: var(--shadow-orange); }
.modal__icon svg { width: 40px; height: 40px; }

.modal__eyebrow { text-transform: uppercase; letter-spacing: .22em; font-weight: 700; font-size: .82rem; color: var(--c-orange); margin-bottom: 6px; }
.modal__title { font-size: clamp(1.5rem, 4vw, 2rem); margin-bottom: 10px; }
.modal__sub { color: var(--c-grey-700); margin-bottom: 20px; }

.modal__note { background: var(--c-orange-soft); border-left: 4px solid var(--c-orange); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 14px 16px; text-align: left; font-size: .95rem; color: var(--c-ink); margin-bottom: 18px; }
.modal__hint { font-size: .9rem; color: var(--c-grey-500); margin-bottom: 14px; line-height: 1.6; }
.modal__hint a { color: var(--c-orange); font-weight: 700; }
.modal__hint a:hover { text-decoration: underline; }

.modal__card .btn { margin-top: 8px; }
.modal__mail { display: block; margin-top: 12px; font-size: .9rem; font-weight: 600; color: var(--c-orange); }
.modal__mail:hover { text-decoration: underline; }
.modal__later { display: block; width: 100%; margin-top: 10px; padding: 8px; color: var(--c-grey-500); font-weight: 600; transition: color var(--t-fast); }
.modal__later:hover { color: var(--c-ink); }

body.modal-open { overflow: hidden; }

/* =============================================================
   15. DARK THEME — ĐỒNG NHẤT TOÀN TRANG (nền tối như Hero)
============================================================= */
:root {
  --c-bg: #08080A;          /* nền chính — đen tuyền như long.vn */
  --c-bg-2: #08080A;        /* section KHÔNG xen kẽ nữa → đồng bộ 1 tông */
  --c-card: #121217;        /* nền card/form/modal — nhỉnh hơn 1 chút để thấy viền */
  --c-line: rgba(255, 255, 255, .1);
  --c-text: #F5F5F7;
  --c-text-muted: rgba(255, 255, 255, .68);
}
body { background: var(--c-bg); color: var(--c-text); }
h1, h2, h3, .section__title { color: var(--c-text); }

/* Section: ĐEN ĐỒNG BỘ TOÀN TRANG — mọi mục cùng 1 nền đen (như long.vn) */
.section--soft { background: var(--c-bg); }
.section--dark, .final-cta, .post-hero { background: var(--c-bg); }
.section__lead { color: var(--c-text-muted); }

/* Header khi cuộn: nền tối mờ thay vì trắng */
.header.is-scrolled { background: rgba(15, 15, 18, .92); box-shadow: 0 4px 24px rgba(0, 0, 0, .45); }
.header.is-scrolled .brand { color: #fff; }
.header.is-scrolled .nav__link { color: rgba(255, 255, 255, .85); }
.header.is-scrolled .nav-toggle span { background: #fff; }

/* Card tối */
.card { background: var(--c-card); border-color: var(--c-line); }
.card:hover { box-shadow: 0 20px 50px -20px rgba(0, 0, 0, .65); border-color: rgba(255, 90, 31, .35); }
.card__icon { background: rgba(255, 90, 31, .14); }
.card--benefit p, .card--journey p, .card__content p { color: var(--c-text-muted); }
.card__tag { background: rgba(255, 90, 31, .16); }
.card__cat { background: rgba(0, 0, 0, .6); }

/* About */
.about__body p, .about__points li { color: var(--c-text-muted); }
/* Nút phụ kiểu long.vn: CHỮ NHẬT + viền mảnh + ruột trong suốt (outline) */
.btn--dark { --btn-bg: transparent; --btn-fg: #fff; border: 1.5px solid rgba(255, 255, 255, .32); }
.btn--dark:hover { background: rgba(255, 255, 255, .08); border-color: rgba(255, 255, 255, .6); }

/* Lead magnet + form tối */
.lead { background: var(--c-bg); }
.lead__form { background: var(--c-card); border-color: var(--c-line); }
.field label { color: var(--c-text); }
.field input { background: #101014; border-color: rgba(255, 255, 255, .14); color: var(--c-text); }
.field input:focus { background: #14141A; border-color: var(--c-orange); }
.field input.is-invalid { background: rgba(224, 49, 49, .1); }
.lead__note { color: var(--c-text-muted); }
.lead__success { background: rgba(255, 90, 31, .14); }
.lead__error { background: rgba(224, 49, 49, .14); }

/* Social card tối */
.social__card { background: var(--c-card); border-color: var(--c-line); color: var(--c-text); }
.social__card svg { color: rgba(255, 255, 255, .82); }
.social__card:hover { box-shadow: 0 20px 50px -20px rgba(0, 0, 0, .65); }
.social__card--tt:hover { color: #fff; } .social__card--tt:hover svg { color: #fff; }

/* Menu mobile tối */
@media (max-width: 820px) {
  .nav { background: #15151A; box-shadow: -10px 0 40px rgba(0, 0, 0, .55); }
  .nav__link { color: var(--c-text); border-bottom-color: rgba(255, 255, 255, .08); }
}

/* Popup chúc mừng tối */
.modal__card { background: var(--c-card); color: var(--c-text); }
.modal__sub { color: var(--c-text-muted); }
.modal__note { background: rgba(255, 90, 31, .14); color: var(--c-text); }
.modal__hint { color: var(--c-text-muted); }
.modal__close:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.modal__later:hover { color: #fff; }

/* Trang bài viết blog tối */
.post-content { color: var(--c-text-muted); }
.post-content h2, .post-content h3, .post-content strong { color: var(--c-text); }
.post-content blockquote { background: rgba(255, 90, 31, .12); color: var(--c-text); }
.post-callout { background: var(--c-bg-2); border-color: var(--c-line); }
.post-callout h3 { color: var(--c-text); }
.post-nav .btn--ghost { --btn-fg: var(--c-text) !important; border-color: rgba(255, 255, 255, .25) !important; }

/* Ảnh mục Giới thiệu: khung VUÔNG 1:1 cho cân đối với cột chữ bên cạnh */
.about__media { margin-inline: auto; }
.about__media img { aspect-ratio: 1 / 1; object-fit: cover; object-position: 54% center; }

/* Mục Thành tích: đã bỏ ô video placeholder → tiêu đề lên trên, 4 cột mốc dàn 2 cột cho kín bề ngang */
.achievements__grid { grid-template-columns: 1fr; gap: clamp(28px, 4vw, 44px); }
.achievements__intro { max-width: 760px; margin-inline: auto; text-align: center; }
.achievements__intro .section__lead { text-wrap: balance; }
.timeline { grid-template-columns: repeat(2, 1fr); column-gap: clamp(28px, 5vw, 64px); padding-left: 20px; }
.timeline__item:last-child { border-left-color: rgba(255, 255, 255, .14); }

@media (max-width: 700px) {
  .timeline { grid-template-columns: 1fr; }
  .timeline__item:last-child { border-left-color: transparent; }
}

/* CTA cuối: 2 nút cạnh nhau (nhận tài liệu + xem sản phẩm), tự xuống dòng trên mobile */
.final-cta__actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.final-cta__shop { --btn-fg: #fff; border-color: rgba(255, 255, 255, .45); }
.final-cta__shop:hover { background: rgba(255, 255, 255, .12); border-color: #fff; }

/* Tiêu đề section nằm gọn 1 HÀNG trên desktop:
   nới khung tiêu đề (680 → 880px) nhưng giữ đoạn mô tả hẹp cho dễ đọc.
   text-wrap: balance → khi màn hẹp buộc phải xuống dòng thì chia đều,
   không để rớt 1 chữ lẻ loi ("BỘ") xuống hàng dưới. */
.section__head { max-width: 880px; }
.section__lead { max-width: 620px; margin-inline: auto; }
.section__title,
.about__title,
.lead__title,
.final-cta__title { text-wrap: balance; }

/* =============================================================
   16. TRANG BÀI VIẾT — SIDEBAR "BÀI VIẾT GẦN ĐÂY"
   (do blog.js tự sinh, dùng chung cho mọi bài)
============================================================= */

/* Bố cục 2 cột: nội dung bài | sidebar. Nới khung để đủ chỗ cho cột phải */
.post-body.has-side, .wrap.has-side {
  max-width: 1160px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}
.post-main { min-width: 0; }


/* ---------- SIDEBAR ---------- */
.post-side { position: sticky; top: 96px; }
.post-side__box {
  background: var(--c-card, #1C1C23);
  border: 1px solid var(--c-line, rgba(255,255,255,.1));
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 26px);
}
.post-side__title {
  font-size: .95rem !important; letter-spacing: .1em; text-transform: uppercase;
  color: var(--c-orange); margin: 0 0 18px !important; font-weight: 800;
}
.post-side__list { list-style: none; padding: 0; margin: 0; }
.post-side__item + .post-side__item { border-top: 1px solid var(--c-line, rgba(255,255,255,.1)); margin-top: 14px; padding-top: 14px; }
.post-side__link { display: flex; gap: 13px; align-items: flex-start; text-decoration: none; }
.post-side__thumb {
  width: 80px; height: 60px; flex-shrink: 0;
  object-fit: cover; border-radius: 10px;
  transition: transform var(--t) var(--ease);
}
.post-side__link:hover .post-side__thumb { transform: scale(1.06); }
.post-side__meta { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.post-side__date { font-size: .78rem; color: var(--c-orange); font-weight: 700; }
.post-side__name {
  font-size: .93rem; font-weight: 600; line-height: 1.45;
  color: var(--c-text, #F5F5F7); transition: color var(--t-fast);
}
.post-side__link:hover .post-side__name { color: var(--c-orange); }
.post-side__all {
  display: inline-block; margin-top: 18px; font-size: .9rem; font-weight: 700;
  color: var(--c-orange); text-decoration: none;
}
.post-side__all:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- MOBILE / TABLET: sidebar xuống dưới bài ---------- */
@media (max-width: 940px) {
  .post-body.has-side, .wrap.has-side { grid-template-columns: 1fr; max-width: 760px; }
  .post-side { position: static; margin-top: 8px; }
}

/* =============================================================
   17. ĐẦU BÀI VIẾT — TIÊU ĐỀ CANH GIỮA, TRANG TRỌNG
   Thứ tự hiển thị: chuyên mục → TIÊU ĐỀ LỚN → ngày & tác giả → breadcrumb
============================================================= */
.post-hero {
  padding-top: clamp(130px, 17vw, 200px);
  padding-bottom: clamp(50px, 8vw, 90px);
  text-align: center;
}
/* Vệt sáng cam dịu, toả từ giữa lên — không chói như bản cũ lệch góc phải */
.post-hero::before {
  background: radial-gradient(70% 100% at 50% -10%, rgba(255, 90, 31, .22), transparent 65%);
}
.post-hero__inner {
  max-width: 940px;
  display: flex; flex-direction: column; align-items: center;
}

/* Chuyên mục: chữ cam nhỏ, giãn ly, có 2 gạch ngang 2 bên */
.post-cat {
  background: none; color: var(--c-orange);
  font-size: .8rem; font-weight: 800; letter-spacing: .22em; text-transform: uppercase;
  padding: 0; border-radius: 0; margin-bottom: 26px;
  display: inline-flex; align-items: center; gap: 16px;
}
.post-cat::before, .post-cat::after {
  content: ""; width: 34px; height: 1px; background: rgba(255, 90, 31, .55);
}

/* Tiêu đề bài: TO, in hoa, canh giữa */
.post-hero__title {
  font-size: clamp(2rem, 5.2vw, 3.6rem);
  line-height: 1.16;
  text-wrap: balance;
}

/* Ngày & tác giả: nhỏ, in hoa, giãn ly */
.post-meta {
  margin-top: 26px; justify-content: center;
  gap: 28px; font-size: .8rem; letter-spacing: .12em; text-transform: uppercase;
  color: rgba(255, 255, 255, .62);
}
.post-meta strong { font-weight: 700; }

/* Breadcrumb xuống DƯỚI CÙNG (như trang mẫu), chữ nhỏ mờ */
.post-hero__inner .breadcrumb {
  order: 5; margin: 26px 0 0; justify-content: center;
  font-size: .74rem; letter-spacing: .1em; text-transform: uppercase;
  color: rgba(255, 255, 255, .42);
}
.post-hero__inner .breadcrumb a:hover { color: var(--c-orange); }
.post-hero__inner .breadcrumb span { color: rgba(255, 255, 255, .25); }

@media (max-width: 640px) {
  .post-meta { gap: 14px; font-size: .72rem; }
  .post-cat::before, .post-cat::after { width: 20px; }
}

/* Ảnh chèn giữa bài viết + chú thích */
.post-figure { margin: 32px 0; }
.post-figure img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }
.post-figure figcaption {
  margin-top: 12px; text-align: center; font-size: .9rem; font-style: italic;
  color: var(--c-text-muted, rgba(255, 255, 255, .68));
}

/* =============================================================
   19. CHÂN TRANG — thiết kế lại: khối thương hiệu + 3 cột + đáy
============================================================= */
.footer__grid { align-items: start; }

/* --- Khối thương hiệu bên trái --- */
.footer__logo { display: inline-flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.footer__logo-mark {
  width: 52px; height: 52px; flex-shrink: 0;
  display: grid; place-items: center;
  border: 1px solid rgba(255, 90, 31, .55); border-radius: 8px;
  color: var(--c-orange); font-size: 1.35rem; font-weight: 800;
  background: rgba(255, 90, 31, .07);
}
.footer__logo-text { display: flex; flex-direction: column; gap: 5px; }
.footer__logo-name {
  font-size: 1.12rem; font-weight: 800; letter-spacing: .16em;
  text-transform: uppercase; color: #fff; line-height: 1.1;
}
.footer__logo-sub {
  font-size: .68rem; font-weight: 600; letter-spacing: .2em;
  text-transform: uppercase; color: var(--c-orange); line-height: 1.2;
}
.footer__slogan {
  font-size: clamp(1.25rem, 2.4vw, 1.7rem); font-weight: 800;
  letter-spacing: .04em; text-transform: uppercase;
  color: var(--c-orange); margin-bottom: 16px; line-height: 1.2;
}
.footer__desc {
  color: rgba(255, 255, 255, .68); font-size: .95rem;
  line-height: 1.75; max-width: 380px;
}

/* --- Tiêu đề cột: chữ cam nhỏ, giãn ly --- */
.footer__heading {
  font-size: .76rem !important; font-weight: 800; letter-spacing: .2em;
  text-transform: uppercase; color: var(--c-orange); margin-bottom: 20px;
}
.footer__col ul { display: flex; flex-direction: column; gap: 13px; }
.footer__col a { color: rgba(255, 255, 255, .78); font-size: .96rem; transition: color var(--t-fast); }
.footer__col a:hover { color: var(--c-orange); }

/* --- Cột kết nối --- */
.footer__connect-desc {
  color: rgba(255, 255, 255, .68); font-size: .95rem;
  line-height: 1.7; margin-bottom: 20px; max-width: 270px;
}
.footer__social { display: flex; gap: 10px; flex-wrap: wrap; }
.footer__social a {
  width: 44px; height: 44px; display: grid; place-items: center;
  border: 1px solid rgba(255, 255, 255, .16); border-radius: 8px;
  color: rgba(255, 255, 255, .8); background: transparent;
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
}
.footer__social a svg { width: 18px; height: 18px; }
.footer__social a:hover {
  color: var(--c-orange); border-color: rgba(255, 90, 31, .6);
  background: rgba(255, 90, 31, .1); transform: translateY(-2px);
}

/* --- Đáy trang: 1 đường kẻ mảnh + dòng bản quyền --- */
.footer__bottom { border-top: 1px solid rgba(255, 255, 255, .09); margin-top: clamp(36px, 5vw, 56px); }
.footer__bottom-inner { padding-block: 26px; }
.footer__bottom-inner p { color: rgba(255, 255, 255, .5); font-size: .88rem; }

@media (max-width: 860px) {
  .footer__slogan { font-size: 1.2rem; }
  .footer__desc, .footer__connect-desc { max-width: none; }
}

/* =============================================================
   20. ⚡ CÔNG TẮC: TẠM ẨN PHỄU "BỘ KHỞI ĐẦU" (form điền thông tin)
   -------------------------------------------------------------
   Anh Long tạm ẩn form thu thông tin (23/07/2026) để đổi sang tặng sách.
   👉 MUỐN BẬT LẠI: XOÁ NGUYÊN KHỐI SỐ 20 NÀY. Không cần sửa file HTML.
   Ẩn luôn mọi nút trỏ tới #lead để khách không bấm vào chỗ trống.
============================================================= */
#lead,                              /* nguyên mục "Nhận bộ khởi đầu" */
.header__cta,                       /* nút cam trên thanh menu */
.nav__list li:has(a[href="#lead"]), /* mục "Tài nguyên" trong menu */
.hero__actions .btn--primary,       /* nút chính ở màn hình đầu */
.final-cta__actions .btn--primary,  /* nút "Bắt đầu ngay" cuối trang */
.post-cta                           /* khối mời nhận tài liệu trong bài blog */
{ display: none !important; }

/* =============================================================
   21. TRANG BÀI VIẾT — THIẾT KẾ LẠI theo mẫu longpt.vn
   Tinh thần: bình thản, chữ to thoáng, ít trang trí
============================================================= */

/* --- 21a. TIÊU ĐỀ BÀI: to hơn, đậm hơn, nổi bật --- */
.post-hero__title {
  font-size: clamp(2.1rem, 5.6vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-inline: auto;
  color: #F7F5F0;                 /* trắng ngà, dịu mắt hơn trắng gắt */
}

/* --- 21b. CHỮ TRONG BÀI: to, thoáng, dễ đọc --- */
.post-content {
  font-size: 1.16rem;             /* ~18.5px */
  line-height: 1.95;              /* thoáng như mẫu */
  color: #D6D7DC;
  letter-spacing: .005em;
}
.post-content > p { margin-bottom: 26px; }
.post-content h2 {
  font-size: clamp(1.45rem, 3vw, 1.95rem);
  margin: 52px 0 20px;
  line-height: 1.3;
  color: #F7F5F0;
}
.post-content h3 { margin: 34px 0 14px; color: #F7F5F0; }
.post-content strong { color: #F2F2F5; font-weight: 700; }
.post-content li { margin-bottom: 12px; }

/* --- 21c. MỤC LỤC: bỏ khung, chữ vàng gạch chân (như mẫu) --- */
.post-anchor { scroll-margin-top: 100px; }

.post-toc {
  margin: 34px 0 44px;
  padding: 0;
  border: 0;
  background: none;
}
.post-toc__title {
  font-size: 1.12rem;
  font-weight: 500;               /* KHÔNG in đậm — như mẫu */
  color: #E6E7EB;
  margin-bottom: 10px;
  text-transform: none;
  letter-spacing: 0;
}
.post-toc__tools { display: flex; gap: 6px; margin-bottom: 18px; }
.post-toc__btn {
  width: 26px; height: 26px; display: grid; place-items: center;
  color: rgba(255, 255, 255, .45); border-radius: 4px;
  transition: color var(--t-fast), background var(--t-fast);
}
.post-toc__btn svg { width: 17px; height: 17px; }
.post-toc__btn:hover { color: var(--c-orange); background: rgba(255, 255, 255, .06); }

/* Danh sách phân cấp: • chấm đặc → ○ chấm rỗng → ▪ vuông */
.post-toc__list { list-style: disc; padding-left: 20px; margin: 0; }
.post-toc__list ul { list-style: circle; padding-left: 26px; margin: 10px 0 4px; }
.post-toc__list ul ul { list-style: square; }
.post-toc__list li { margin-bottom: 12px; line-height: 1.55; color: rgba(255, 255, 255, .3); }

/* Link vàng đồng, gạch chân — điểm nhận diện của mẫu */
.post-toc__list a {
  color: var(--c-orange);
  font-size: 1.05rem;
  font-weight: 400;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
  text-decoration-color: rgba(255, 90, 31, .45);
  transition: color var(--t-fast), text-decoration-color var(--t-fast);
}
.post-toc__list a:hover { color: #FF7A45; text-decoration-color: #FF7A45; }
.post-toc__list ul a { font-size: 1rem; }

/* Kiểu đánh số (bấm nút danh sách để đổi) */
.post-toc.is-numbered .post-toc__list { list-style: decimal; }
.post-toc.is-numbered .post-toc__list ul { list-style: lower-alpha; }

/* Thu gọn */
.post-toc.is-collapsed .post-toc__list { display: none; }

/* --- 21d. CỘT BÀI VIẾT GẦN ĐÂY: ảnh VUÔNG, có đường kẻ --- */
.post-side__box {
  background: #131318;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 4px;             /* góc vuông vức như mẫu */
  padding: 30px 28px;
}
.post-side__title {
  font-size: .82rem !important;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-orange);
  padding-bottom: 18px;
  margin: 0 0 6px !important;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.post-side__item + .post-side__item { border-top: 1px solid rgba(255, 255, 255, .1); }
.post-side__item { padding: 20px 0; margin: 0 !important; border-top: 0; }
.post-side__link { gap: 16px; align-items: flex-start; }
.post-side__thumb {
  width: 72px; height: 72px;      /* VUÔNG */
  border-radius: 2px;
}
.post-side__date {
  font-size: .82rem; font-weight: 400; letter-spacing: .06em;
  color: var(--c-orange); margin-bottom: 6px;
}
.post-side__name {
  font-size: 1.02rem; font-weight: 600; line-height: 1.5;
  color: #EDEEF2;
}
.post-side__link:hover .post-side__name { color: var(--c-orange); }
.post-side__all {
  margin-top: 20px; padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  color: var(--c-orange); font-weight: 600; font-size: .92rem;
}

@media (max-width: 640px) {
  .post-content { font-size: 1.08rem; line-height: 1.85; }
  .post-toc__list a { font-size: 1rem; }
}

/* =============================================================
   22. BÀI VIẾT LIÊN QUAN — cuối bài, ngay trước chân trang
============================================================= */
.post-related {
  padding-block: clamp(56px, 8vw, 96px);
  border-top: 1px solid rgba(255, 255, 255, .07);
  text-align: center;
}
.post-related__eyebrow {
  display: inline-flex; align-items: center; gap: 16px;
  font-size: .78rem; font-weight: 700; letter-spacing: .24em;
  text-transform: uppercase; color: var(--c-orange); margin-bottom: 18px;
}
.post-related__eyebrow::before, .post-related__eyebrow::after {
  content: ""; width: 34px; height: 1px; background: rgba(255, 90, 31, .55);
}
.post-related__title {
  font-size: clamp(1.8rem, 4.4vw, 3rem);
  font-weight: 900; color: #F7F5F0;
  margin-bottom: clamp(34px, 5vw, 56px);
}
.post-related__grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: clamp(16px, 2vw, 26px);
}

.rel-card {
  display: flex; flex-direction: column;
  background: #131318;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 4px;
  overflow: hidden;
  transition: border-color var(--t), transform var(--t) var(--ease);
}
.rel-card:hover { border-color: rgba(255, 90, 31, .5); transform: translateY(-4px); }
.rel-card__thumb { display: block; aspect-ratio: 16 / 10; overflow: hidden; }
.rel-card__thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--t) var(--ease); }
.rel-card:hover .rel-card__thumb img { transform: scale(1.05); }

.rel-card__body { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 22px 20px 26px; }
.rel-card__meta {
  font-size: .74rem; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase; color: var(--c-orange);
}
.rel-card__title {
  font-size: 1.02rem; font-weight: 800; line-height: 1.4;
  text-transform: uppercase; color: #F2F2F5; text-wrap: balance;
}
.rel-card:hover .rel-card__title { color: var(--c-orange); }
.rel-card__more {
  margin-top: auto; font-size: .76rem; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: rgba(255, 255, 255, .5);
}
.rel-card:hover .rel-card__more { color: var(--c-orange); }

@media (max-width: 1024px) { .post-related__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px)  { .post-related__grid { grid-template-columns: 1fr; } }

/* =============================================================
   23. TINH CHỈNH THEO GÓP Ý — bỏ dáng "AI", bám khung, ảnh vuông
============================================================= */

/* --- 23a. Nút chuyển bài cuối bài: bỏ viên thuốc + chữ cam gạch chân --- */
.post-nav {
  border-top: 1px solid rgba(255, 255, 255, .09);
  padding-top: 28px;
  margin-top: 44px;
}
.post-content .post-nav .btn {
  background: none !important;
  border: 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  padding: 0 !important;
  font-size: .98rem;
  font-weight: 600;
  color: rgba(255, 255, 255, .72) !important;
  text-decoration: none;
  transition: color var(--t-fast);
}
.post-content .post-nav .btn:hover {
  background: none !important;
  transform: none !important;
  color: var(--c-orange) !important;
}

/* --- 23b. Tiêu đề bài bám khung, không bó cụm giữa trang --- */
.post-hero__inner { max-width: 1000px; }
.post-hero__title { max-width: none; }

/* --- 23c. Ảnh trong bài: khung VUÔNG như mẫu --- */
.post-cover,
.post-figure img {
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 2px;
}

/* --- 23d. Thẻ "Bài viết liên quan": ảnh vuông, bỏ hiệu ứng nhấc lên --- */
.rel-card__thumb { aspect-ratio: 1 / 1; }
.rel-card { border-radius: 2px; }
.rel-card:hover { transform: none; }

/* --- 23e. Ô kinh nghiệm: bỏ khung hộp, chỉ 1 vạch cam bên trái --- */
.post-callout {
  background: none;
  border: 0;
  border-left: 3px solid var(--c-orange);
  border-radius: 0;
  padding: 4px 0 4px 24px;
  margin: 34px 0;
}
.post-callout h3 {
  font-size: 1.15rem;
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 12px;
}

/* SỬA: ảnh TRONG BÀI giữ nguyên khung gốc — cắt vuông làm mất
   số liệu Strava (quãng đường / pace / thời gian) ở mép ảnh.
   Chỉ ảnh thumbnail nhỏ mới cắt vuông cho đều hàng. */
.post-cover,
.post-figure img {
  aspect-ratio: auto;
  object-fit: contain;
  height: auto;
}

/* =============================================================
   24. MENU THẢ XUỐNG Ở "BLOG" — rê chuột hiện chủ đề bài viết
============================================================= */
.nav__item--drop { position: relative; }

.nav-drop {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: min(720px, 90vw);
  padding-top: 14px;                 /* khoảng đệm để rê chuột không bị hụt */
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t) var(--ease), transform var(--t) var(--ease);
  z-index: 120;
}
.nav__item--drop:hover .nav-drop,
.nav__item--drop:focus-within .nav-drop {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-drop__inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px 34px;
  padding: 30px 34px;
  background: #16161C;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 4px;
  box-shadow: 0 26px 60px -20px rgba(0, 0, 0, .8);
}

.nav-drop__head {
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-orange);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.nav-drop__col ul { display: flex; flex-direction: column; gap: 12px; }
.nav-drop__col a {
  display: block;
  font-size: .8rem;
  font-weight: 400;
  letter-spacing: .06em;
  text-transform: uppercase;
  line-height: 1.5;
  color: rgba(255, 255, 255, .72);
  transition: color var(--t-fast);
}
.nav-drop__col a:hover { color: var(--c-orange); }

.nav-drop__col--all {
  grid-column: 1 / -1;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  text-align: center;
}
.nav-drop__all { font-size: .9rem; font-weight: 700; color: var(--c-orange) !important; }

/* --- Điện thoại / tablet: menu trượt ngang, hiện dạng danh sách --- */
@media (max-width: 820px) {
  .nav-drop {
    position: static;
    transform: none;
    min-width: 0;
    padding-top: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 1;
    visibility: visible;
    transition: max-height var(--t) var(--ease);
  }
  .nav__item--drop.is-open .nav-drop { max-height: 1200px; }
  .nav-drop__inner {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 16px 0 6px;
    background: none;
    border: 0;
    box-shadow: none;
  }
  .nav-drop__col--all { text-align: left; }
}

/* SỬA: "Blog" nằm gần mép phải nên menu căn giữa bị tràn khỏi màn hình.
   → Neo menu theo mép PHẢI của mục Blog để luôn nằm trọn trong khung. */
@media (min-width: 821px) {
  .nav-drop {
    left: auto;
    right: 0;
    transform: translateY(8px);
    max-width: calc(100vw - 48px);
  }
  .nav__item--drop:hover .nav-drop,
  .nav__item--drop:focus-within .nav-drop { transform: translateY(0); }
}

/* =============================================================
   25. 3 TRỤ CỘT GIÁ TRỊ (điều chạy bộ mang lại)
============================================================= */
.pillars {
  background: var(--c-ink, #0F0F12);
  position: relative;
  overflow: hidden;
}
.pillars::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(60% 60% at 50% 0%, rgba(255, 90, 31, .12), transparent 65%);
  pointer-events: none;
}
.pillars .container { position: relative; z-index: 1; }

.pillars__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(30px, 4vw, 44px);
}

.pillar {
  position: relative;
  padding: clamp(32px, 4vw, 44px) clamp(26px, 3vw, 36px) clamp(34px, 4vw, 46px);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .02);
  text-align: center;
  transition: border-color var(--t), transform var(--t) var(--ease), background var(--t);
}
.pillar:hover {
  border-color: rgba(255, 90, 31, .5);
  background: rgba(255, 90, 31, .05);
  transform: translateY(-6px);
}

/* Số thứ tự lớn, mờ, làm nền */
.pillar__num {
  display: block;
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1;
  color: rgba(255, 90, 31, .22);
  margin-bottom: 8px;
}

/* Vòng tròn icon cam */
.pillar__icon {
  display: grid; place-items: center;
  width: 68px; height: 68px;
  margin: 0 auto 22px;
  border-radius: 50%;
  background: rgba(255, 90, 31, .14);
  color: var(--c-orange);
}
.pillar__icon svg { width: 30px; height: 30px; }

.pillar__title {
  font-size: clamp(1.4rem, 2.6vw, 1.8rem);
  color: #fff;
  margin-bottom: 14px;
}
.pillar__desc {
  color: rgba(255, 255, 255, .68);
  font-size: 1rem;
  line-height: 1.75;
  max-width: 32ch;
  margin: 0 auto;
}

@media (max-width: 820px) {
  .pillars__grid { grid-template-columns: 1fr; max-width: 460px; margin-inline: auto; }
}

/* =============================================================
   20. DẢI CHẠY THÀNH TÍCH (MARQUEE) — tự chạy phải→trái, lặp vô tận
============================================================= */
.marquee {
  overflow: hidden;
  background: var(--c-bg);
  border-top: 1px solid rgba(255, 255, 255, .09);
  border-bottom: 1px solid rgba(255, 255, 255, .09);
  padding: 15px 0;
}
.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee-scroll 32s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; } /* rê chuột vào thì dừng cho dễ đọc */
.marquee__group {
  display: flex;
  align-items: center;
  flex: none;
}
.marquee__item {
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .82);
  white-space: nowrap;
  padding: 0 30px;
}
.marquee__sep {
  color: var(--c-orange);
  font-size: .58rem;
  line-height: 1;
}
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); } /* dịch đúng 1 nhóm → lặp liền mạch không giật */
}
@media (max-width: 640px) {
  .marquee__item { font-size: .74rem; padding: 0 20px; letter-spacing: .12em; }
}
@media (prefers-reduced-motion: reduce) {
  .marquee__track { animation: none; }
}

/* =============================================================
   21. HERO nâng cấp — eyebrow gạch vàng + cột số liệu bên phải (mẫu long.vn)
============================================================= */
.hero__eyebrow--line {
  background: none !important; border: none !important; backdrop-filter: none !important;
  padding: 0; color: var(--c-orange); font-weight: 600;
  letter-spacing: .2em; text-transform: uppercase; font-size: clamp(.7rem, 1vw, .78rem);
  display: inline-flex; align-items: center; gap: 14px;
}
.hero__eyebrow--line::before { content: ""; width: 40px; height: 1px; background: currentColor; opacity: .7; }

.hero__stats {
  position: absolute; right: clamp(18px, 4vw, 60px); top: 50%; transform: translateY(-40%);
  z-index: 2; display: grid; gap: clamp(20px, 4vh, 38px); text-align: right;
}
/* Đổ bóng nhẹ cho cả cụm số → nổi trên ảnh nền sáng (dùng filter để hợp với chữ gradient) */
.hero__stat { filter: drop-shadow(0 2px 12px rgba(0, 0, 0, .6)); }
.hero__stat strong {
  display: block; font-size: clamp(1.7rem, 3vw, 2.7rem); font-weight: 800;
  line-height: 1; letter-spacing: -.02em;
  /* Vàng gradient kim loại như mẫu long.vn */
  background: linear-gradient(175deg, #F8ECB8 0%, #EBCB6D 42%, #C89A3A 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero__stat strong span { font-size: .46em; margin-left: 4px; font-weight: 700; }
.hero__stat em {
  display: block; margin-top: 7px; font-style: normal;
  font-size: .68rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase;
  color: rgba(226, 202, 140, .82);
}
/* Màn hẹp: ẩn cột số liệu cho gọn (như long.vn trên mobile) */
@media (max-width: 900px) { .hero__stats { display: none; } }

/* =============================================================
   22. MỤC GIỚI THIỆU — khung ảnh viền lệch + ô nhãn tối + 3 ô số liệu (mẫu long.vn)
============================================================= */
/* Eyebrow có gạch ngang đầu dòng */
.eyebrow--line { display: inline-flex; align-items: center; gap: 12px; }
.eyebrow--line::before { content: ""; width: 30px; height: 1px; background: currentColor; opacity: .7; }

/* Khung ảnh: đường viền mảnh nhô lệch ra góc trên-phải sau ảnh */
.about__media--framed { position: relative; isolation: isolate; margin: 0; max-width: none; }
.about__media--framed img {
  position: relative; z-index: 1; width: 100%; aspect-ratio: 4 / 5;
  object-fit: cover; object-position: center; border-radius: 0;
  border: 1px solid rgba(255, 255, 255, .16); box-shadow: 0 30px 60px -30px rgba(0,0,0,.7);
}
/* Bỏ khung viền lệch (offset) — luật anh: chữ nhật nhọn, không bo tròn */
.about__media--framed::before { display: none; }

/* Khung dọc TRỐNG — góc vuông sắc, chỉ hiện khi chưa có ảnh (anh tự thêm ảnh sau) */
.about__media--framed .about__media__hint { display: none; }
.about__media--framed.is-empty img { display: none; }
.about__media--framed.is-empty .about__media__hint {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  position: relative; z-index: 1; aspect-ratio: 4 / 5; border-radius: 0;
  background: #15151a; border: 1.5px dashed rgba(255, 255, 255, .22);
  color: rgba(255, 255, 255, .45); box-shadow: 0 30px 60px -30px rgba(0,0,0,.7);
}
.about__media--framed.is-empty .about__media__hint em {
  font-style: normal; font-size: .86rem; font-weight: 600; letter-spacing: .05em;
}

/* Ô nhãn tối đè góc dưới-trái ảnh */
.about__badge--dark {
  position: absolute; left: 18px; bottom: 18px; right: auto; top: auto; z-index: 2;
  background: rgba(8, 8, 10, .82); backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, .14); box-shadow: none;
  padding: 12px 18px; border-radius: 12px; color: #fff; display: block; text-align: left; line-height: 1.15;
}
.about__badge--dark strong { display: block; font-size: 1.35rem; font-weight: 800; letter-spacing: .04em; }
.about__badge--dark .about__badge-sub {
  display: block; margin-top: 3px; font-size: .66rem; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: rgba(255, 255, 255, .62);
}

/* Dòng triết lý in nghiêng */
.about__quote { margin-top: 16px; color: rgba(255, 255, 255, .72); }
.about__quote em { color: var(--c-orange); font-style: italic; font-weight: 500; }

/* Hàng 3 ô số liệu có viền chia */
.about__stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border: 1px solid rgba(255, 255, 255, .12); border-radius: 12px;
  margin: 26px 0 30px; overflow: hidden;
}
.about__stat { padding: 18px 16px; border-left: 1px solid rgba(255, 255, 255, .1); }
.about__stat:first-child { border-left: none; }
.about__stat strong {
  display: block; font-size: 1.5rem; font-weight: 800; line-height: 1; letter-spacing: -.01em;
  background: linear-gradient(175deg, #F8ECB8 0%, #EBCB6D 42%, #C89A3A 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent;
}
.about__stat strong span { font-size: .5em; margin-left: 3px; }
.about__stat em {
  display: block; margin-top: 6px; font-style: normal; font-size: .66rem; font-weight: 600;
  letter-spacing: .06em; text-transform: uppercase; color: rgba(255, 255, 255, .6);
}
@media (max-width: 560px) {
  .about__stats { grid-template-columns: 1fr; }
  .about__stat { border-left: none; border-top: 1px solid rgba(255, 255, 255, .1); }
  .about__stat:first-child { border-top: none; }
  .about__media--framed { margin-right: 0; }
}

/* =============================================================
   23. MỤC ĐĂNG KÝ EMAIL (newsletter) — mẫu long.vn: nền đen, nút vàng
============================================================= */
.newsletter { text-align: center; background: var(--c-bg); }
.newsletter__inner { max-width: 760px; margin-inline: auto; }
.newsletter__eyebrow { display: inline-block; color: var(--c-orange); letter-spacing: .22em; }
.newsletter__title {
  font-size: clamp(1.8rem, 4.5vw, 3rem); font-weight: 800;
  text-transform: uppercase; letter-spacing: 0; line-height: 1.15;
  color: var(--c-text); text-wrap: balance; margin-bottom: 16px;
}
.newsletter__desc {
  max-width: 620px; margin: 0 auto 30px; font-weight: 300;
  color: var(--c-text-muted); text-wrap: balance;
}
.newsletter__fields { display: flex; gap: 12px; max-width: 560px; margin: 0 auto 14px; }
.newsletter__fields input {
  flex: 1; min-width: 0; padding: 14px 16px; border-radius: 4px;
  background: #131318; border: 1px solid rgba(255, 255, 255, .14);
  color: #fff; font: inherit; transition: border-color var(--t-fast);
}
.newsletter__fields input::placeholder { color: rgba(255, 255, 255, .4); }
.newsletter__fields input:focus { outline: none; border-color: var(--c-orange); }
.newsletter__btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 4px; cursor: pointer;
  font-weight: 800; letter-spacing: .04em; text-transform: uppercase; font-size: .88rem;
  color: #fff; background: var(--c-orange);
  box-shadow: var(--shadow-orange);
  transition: transform var(--t-fast) var(--ease), filter var(--t-fast);
}
.newsletter__btn:hover { transform: translateY(-2px); background: var(--c-orange-dark); }
.newsletter__btn:disabled { opacity: .7; cursor: default; transform: none; }
.newsletter__note { margin-top: 14px; font-size: .8rem; color: rgba(255, 255, 255, .45); }
.newsletter__msg { margin-top: 12px; font-weight: 600; }
.newsletter__msg--ok { color: var(--c-orange); }
.newsletter__msg--err { color: #E8705A; }
@media (max-width: 560px) { .newsletter__fields { flex-direction: column; } }

/* =============================================================
   24. MỤC TRIẾT LÝ CHẠY BỘ — câu trích lớn + 3 cột (mẫu long.vn, màu cam)
============================================================= */
.philosophy { text-align: center; background: var(--c-bg); }
.philosophy__inner { max-width: 900px; margin-inline: auto; }
.philosophy__eyebrow {
  display: inline-flex; align-items: center; gap: 14px;
  color: var(--c-orange); letter-spacing: .22em;
}
.philosophy__eyebrow::before, .philosophy__eyebrow::after {
  content: ""; width: 30px; height: 1px; background: currentColor; opacity: .55;
}
.philosophy__quote {
  font-size: clamp(1.5rem, 3.6vw, 2.7rem); font-style: italic; font-weight: 300;
  line-height: 1.4; color: var(--c-text); text-wrap: balance;
  max-width: 800px; margin: 24px auto 48px; letter-spacing: -.01em;
}
.philosophy__pillars {
  display: grid; grid-template-columns: repeat(3, 1fr); text-align: left;
  border: 1px solid rgba(255, 255, 255, .1); border-radius: 12px; overflow: hidden;
}
.philosophy__pillar { padding: 26px 24px; border-left: 1px solid rgba(255, 255, 255, .08); }
.philosophy__pillar:first-child { border-left: none; }
.philosophy__num {
  display: block; font-size: .78rem; font-weight: 700; letter-spacing: .2em;
  color: rgba(255, 255, 255, .32); margin-bottom: 12px;
}
.philosophy__ptitle {
  font-size: 1.12rem; font-weight: 800; text-transform: uppercase;
  color: var(--c-orange); margin-bottom: 10px; letter-spacing: .01em;
}
.philosophy__pillar p { color: var(--c-text-muted); font-size: .94rem; font-weight: 300; }
@media (max-width: 700px) {
  .philosophy__pillars { grid-template-columns: 1fr; }
  .philosophy__pillar { border-left: none; border-top: 1px solid rgba(255, 255, 255, .08); }
  .philosophy__pillar:first-child { border-top: none; }
}

/* =============================================================
   25. BANNER THỬ THÁCH 30 NGÀY — ảnh nền + phủ tối + CTA (mẫu sự kiện long.vn)
============================================================= */
.challenge { position: relative; overflow: hidden; background: #0a0a0c; padding-block: clamp(96px, 14vw, 160px); }
.challenge__bg {
  position: absolute; inset: 0; z-index: 0;
  background: url('assets/images/blog/quyen-group.jpg') right 75% / cover no-repeat;
}
.challenge__bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(8,8,10,.95) 0%, rgba(8,8,10,.72) 45%, rgba(8,8,10,.15) 100%);
}
.challenge__inner { position: relative; z-index: 1; }
.challenge__badge {
  display: inline-block; border: 1px solid rgba(255, 90, 31, .55); color: var(--c-orange);
  padding: 8px 16px; border-radius: 4px; font-size: .74rem; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; margin-bottom: 22px;
}
.challenge__title {
  font-size: clamp(2rem, 5.2vw, 3.4rem); font-weight: 800; text-transform: uppercase;
  color: #fff; line-height: 1.08; margin-bottom: 18px; text-wrap: balance; max-width: 620px;
}
.challenge__desc { color: rgba(255, 255, 255, .82); font-weight: 300; max-width: 540px; margin-bottom: 30px; }
.challenge__actions { display: flex; flex-wrap: wrap; gap: 14px; }