/* Website PFamily — màu, chữ, khoảng cách lấy từ app (FTreeClient lib/theme.dart):
   đỏ son #5B1A1A, kem #F4F1EA, vàng #E7D3A1, xanh lá #2E7D32, chữ #2B2B2B.
   Chế độ tối theo máy: nền nâu đậm, chữ CHỈ trắng / vàng nhạt (luật của app). */

@font-face { font-family: Roboto; font-weight: 400; font-display: swap; src: url(../fonts/Roboto-Regular.ttf) format("truetype"); }
@font-face { font-family: Roboto; font-weight: 500; font-display: swap; src: url(../fonts/Roboto-Medium.ttf) format("truetype"); }
@font-face { font-family: Roboto; font-weight: 700; font-display: swap; src: url(../fonts/Roboto-Bold.ttf) format("truetype"); }

:root {
  --maroon: #5B1A1A;
  --maroon-light: #8A1F1F;
  --maroon-soft: #A83232;
  --cream: #F4F1EA;
  --gold: #E7D3A1;
  --gold-pale: #F3E7C9;
  --green: #2E7D32;

  --page: var(--cream);
  --page-alt: #FBF6EC;
  --card: #FFFFFF;
  --ink: #2B2B2B;
  --muted: #5F564D;
  --border: #EADFC9;
  --accent: var(--maroon);
  --link: var(--maroon-light);
  --ico-bg: var(--gold-pale);
  --ico: var(--maroon);
  --btn: var(--maroon-light);
  --btn-ink: #FFFFFF;
  --hero-a: #8A1F1F;
  --hero-b: #5B1A1A;
  --shadow: 0 1px 2px rgba(91, 26, 26, .06), 0 8px 24px rgba(91, 26, 26, .07);

  --male-fill: #E8F1F5; --male-edge: #2F6F8F;
  --female-fill: #F9E8EE; --female-edge: #B0476B;
  --other-fill: #F5EFD9; --other-edge: #A98A3A;
  --tree-link: #9A8873;

  --r-sm: 8px; --r-md: 12px; --r-lg: 16px; --r-xl: 30px;
  --wrap: 1160px;
  --gutter: 16px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #1B1613;
    --page-alt: #211A17;
    --card: #29211D;
    --ink: #FFFFFF;
    --muted: rgba(255, 255, 255, .72);
    --border: #4A3D34;
    --accent: var(--gold);
    --link: var(--gold-pale);
    --ico-bg: #3B2F1E;
    --ico: var(--gold);
    --btn: var(--maroon-light);
    --hero-a: #5B1A1A;
    --hero-b: #2A0F0D;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3);
    --male-fill: #24343B; --male-edge: #7FB3C8;
    --female-fill: #3A262E; --female-edge: #E09AB2;
    --other-fill: #3A3222; --other-edge: #D8BE7A;
    --tree-link: #8F7F72;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 400 17px/1.65 Roboto, -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0; /* dấu tiếng Việt đã làm chữ thưa, không giãn thêm */
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { max-width: 100%; }
a { color: var(--link); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; color: var(--accent); font-weight: 700; }
h1 { font-size: clamp(30px, 5.2vw, 52px); }
h2 { font-size: clamp(24px, 3.4vw, 36px); }
h3 { font-size: 19px; }
p { margin: 0 0 1em; }
kbd { font: 500 .85em Roboto, sans-serif; padding: 1px 6px; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 6px; background: var(--card); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 8px; top: -60px; z-index: 100; background: var(--card); color: var(--ink); padding: 8px 14px; border-radius: var(--r-sm); }
.skip:focus { top: 8px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: max(var(--gutter), env(safe-area-inset-left));
  padding-right: max(var(--gutter), env(safe-area-inset-right));
}
.narrow { max-width: 820px; }
.center { text-align: center; margin-top: 32px; }

/* ---------- nút ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 24px;
  border-radius: var(--r-md); border: 1.5px solid transparent;
  font: 600 16px/1.2 Roboto, sans-serif; text-decoration: none; cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .2s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--btn); color: var(--btn-ink); }
.btn-primary:hover { background: var(--maroon-soft); }
.btn-outline { border-color: var(--accent); color: var(--accent); background: transparent; }
.btn-outline:hover { background: var(--accent); color: var(--page); }
.btn-gold { background: var(--gold); color: var(--maroon); }
.btn-gold:hover { background: var(--gold-pale); }
.btn-ghost-light { border-color: rgba(243, 231, 201, .6); color: #FFFFFF; background: transparent; }
.btn-ghost-light:hover { background: rgba(255, 255, 255, .1); border-color: var(--gold-pale); }

/* ---------- thanh đầu trang ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--maroon);
  color: #FFFFFF;
  padding-top: env(safe-area-inset-top);
  box-shadow: 0 1px 0 rgba(0, 0, 0, .15);
}
.topbar-in { display: flex; align-items: center; gap: 16px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #FFFFFF; text-decoration: none; font-weight: 700; font-size: 21px; }
.brand:hover { text-decoration: none; }
.brand img { display: block; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.nav ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.nav ul a { display: block; padding: 8px 12px; border-radius: var(--r-sm); color: #FFFFFF; text-decoration: none; font-weight: 500; font-size: 16px; }
.nav ul a:hover { background: rgba(255, 255, 255, .1); }
.nav ul a[aria-current="page"] { color: var(--gold-pale); box-shadow: inset 0 -2px 0 var(--gold); border-radius: 0; }
.nav-admin { min-height: 40px; padding: 8px 16px; font-size: 15px; margin-left: 8px; }
.menu-btn { display: none; }

@media (max-width: 900px) {
  .js .menu-btn {
    display: inline-flex; align-items: center; justify-content: center;
    margin-left: auto; width: 48px; height: 48px;
    background: transparent; border: 0; color: #FFFFFF; cursor: pointer; border-radius: var(--r-sm);
  }
  .menu-bars, .menu-bars::before, .menu-bars::after { display: block; width: 22px; height: 2px; background: currentColor; border-radius: 2px; position: relative; transition: transform .25s, background .25s; }
  .menu-bars::before, .menu-bars::after { content: ""; position: absolute; left: 0; }
  .menu-bars::before { top: -7px; } .menu-bars::after { top: 7px; }
  .menu-open .menu-bars { background: transparent; }
  .menu-open .menu-bars::before { transform: translateY(7px) rotate(45deg); }
  .menu-open .menu-bars::after { transform: translateY(-7px) rotate(-45deg); }

  .js .nav {
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--maroon); padding: 8px max(var(--gutter), env(safe-area-inset-left)) 20px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, .25);
    display: none;
  }
  .js .menu-open .nav { display: flex; }
  .js .nav ul { flex-direction: column; }
  .js .nav ul a { padding: 14px 8px; font-size: 18px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
  .js .nav ul a[aria-current="page"] { box-shadow: inset 3px 0 0 var(--gold); padding-left: 14px; }
  .js .nav-admin { margin: 16px 0 0; }
  /* Không có JS: menu xuống dòng, vẫn dùng được. */
  .no-js .topbar-in { flex-wrap: wrap; padding-bottom: 8px; }
  .no-js .nav { flex-wrap: wrap; margin-left: 0; }
  .no-js .nav ul { flex-wrap: wrap; }
}

/* ---------- hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(160deg, var(--hero-a), var(--hero-b));
  color: #FFFFFF;
  padding: clamp(48px, 8vw, 96px) 0 clamp(96px, 12vw, 150px);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px 300px at 85% 10%, rgba(255, 217, 122, .16), transparent 70%);
  pointer-events: none;
}
.hero-in { position: relative; z-index: 2; display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.hero h1 { color: #FFFFFF; }
.hero h1 span { color: var(--gold); display: block; }
.hero .lead { color: rgba(255, 255, 255, .88); }
.hero a:not(.btn):not(.store) { color: var(--gold-pale); }
.hero-admin { font-size: 15px; color: rgba(255, 255, 255, .8); margin-top: 20px; }
.hero-admin a { display: inline-flex; align-items: center; gap: 4px; font-weight: 500; }
.hero-admin .ico { width: 18px; height: 18px; }
.hero-hill { position: absolute; left: 0; right: 0; bottom: -2px; width: 100%; height: clamp(80px, 12vw, 150px); object-fit: cover; object-position: right bottom; z-index: 1; pointer-events: none; }
.hero-art { display: flex; justify-content: center; }
.eyebrow { text-transform: uppercase; font-weight: 700; font-size: 13px; letter-spacing: .08em; color: var(--maroon-soft); margin-bottom: 12px; }
.hero .eyebrow, .cta .eyebrow, .page-head .eyebrow { color: var(--gold); }
@media (prefers-color-scheme: dark) { .eyebrow { color: var(--gold); } }
.lead { font-size: clamp(17px, 2vw, 20px); max-width: 640px; }

@media (max-width: 900px) {
  .hero-in { grid-template-columns: 1fr; text-align: center; }
  .hero .lead { margin-left: auto; margin-right: auto; }
  .hero .store-row { justify-content: center; }
}

/* ---------- nút kho ứng dụng ---------- */
.store-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 8px; }
.store {
  display: inline-flex; align-items: center; gap: 10px;
  min-width: 176px; min-height: 56px; padding: 8px 18px;
  background: #140B0A; color: #FFFFFF; border: 1px solid rgba(255, 255, 255, .25);
  border-radius: var(--r-md); text-decoration: none; line-height: 1.15;
  font-weight: 600; font-size: 18px;
  transition: transform .2s, border-color .2s;
}
.store:hover { transform: translateY(-2px); border-color: var(--gold); text-decoration: none; }
.store svg { width: 28px; height: 28px; flex: none; }
.store small { display: block; font-size: 12px; font-weight: 400; opacity: .85; }
.store.is-soon { opacity: .7; cursor: default; }
.store.is-soon:hover { transform: none; border-color: rgba(255, 255, 255, .25); }
.store-note { font-size: 14px; color: var(--muted); margin: 0; }
.hero .store-note, .cta .store-note { color: rgba(255, 255, 255, .78); }
.section .store-row .store { border-color: transparent; }

/* ---------- điện thoại minh hoạ ---------- */
.phone {
  width: min(300px, 78vw); aspect-ratio: 9 / 19;
  border-radius: 44px; padding: 11px;
  background: #120A09;
  box-shadow: 0 0 0 2px rgba(231, 211, 161, .35), 0 30px 60px rgba(0, 0, 0, .45);
  transform: rotate(2deg);
}
.phone-screen {
  height: 100%; border-radius: 34px; overflow: hidden;
  background: #F4F1EA; color: #2B2B2B;
  display: flex; flex-direction: column; font-size: 11px; line-height: 1.35; text-align: left;
}
.ph-hero { position: relative; background: linear-gradient(160deg, #8A1F1F, #5B1A1A); color: #FFFFFF; padding: 10px 16px 46px; overflow: hidden; }
.ph-status { display: flex; justify-content: space-between; font-weight: 600; font-size: 10px; margin-bottom: 14px; }
.ph-dots { width: 40px; height: 8px; border-radius: 4px; background: rgba(255, 255, 255, .7); }
.ph-title { font-size: 17px; font-weight: 700; }
.ph-sub { opacity: .85; font-size: 10px; }
.ph-hill { position: absolute; left: 0; right: 0; bottom: 0; width: 100%; height: 44px; object-fit: cover; object-position: right bottom; }
.ph-body { flex: 1; padding: 12px; display: flex; flex-direction: column; gap: 10px; }
.ph-search { background: #FFFFFF; border: 1px solid #EADFC9; border-radius: 10px; padding: 8px 10px; color: #6F6459; }
.ph-card { background: #FFFFFF; border: 1px solid #EADFC9; border-radius: 12px; padding: 10px; }
.ph-anni { display: flex; gap: 10px; align-items: center; }
.ph-anni b { display: block; color: #5B1A1A; }
.ph-anni small { color: #5F564D; }
.ph-date { flex: none; width: 46px; text-align: center; background: #F3E7C9; border-radius: 10px; padding: 5px 0; }
.ph-date b { font-size: 17px; line-height: 1; }
.ph-date small { font-size: 8px; }
.ph-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.ph-grid span { background: #FFFFFF; border: 1px solid #EADFC9; border-radius: 12px; padding: 10px 4px 8px; text-align: center; font-size: 9.5px; font-weight: 500; }
.ph-grid i { display: block; width: 22px; height: 22px; margin: 0 auto 5px; border-radius: 7px; background: #F3E7C9; position: relative; }
.ph-grid i::after { content: ""; position: absolute; inset: 6px; border-radius: 3px; background: #8A1F1F; }
.ph-grid .i-cal::after { background: #6A1B9A; } .ph-grid .i-map::after { background: #2E7D32; border-radius: 50% 50% 50% 0; }
.ph-grid .i-doc::after { background: #00838F; } .ph-grid .i-img::after { background: #C2185B; } .ph-grid .i-news::after { background: #1565C0; }
.ph-tabs { display: flex; justify-content: space-around; background: #FFFFFF; border-top: 1px solid #EADFC9; padding: 8px 4px 14px; font-size: 8.5px; color: #5F564D; }
.ph-tabs .on { color: #5B1A1A; font-weight: 700; }

/* ---------- dải nổi bật ---------- */
.strip { background: var(--card); border-bottom: 1px solid var(--border); }
.strip-in { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; padding-top: 22px; padding-bottom: 22px; }
.strip-in > div { display: flex; align-items: center; gap: 12px; }
.strip-in .ico { width: 40px; height: 40px; padding: 9px; flex: none; border-radius: var(--r-md); background: var(--ico-bg); color: var(--ico); }
.strip-in b { display: block; font-size: 16px; line-height: 1.3; }
.strip-in small { color: var(--muted); font-size: 14px; }
@media (max-width: 900px) { .strip-in { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .strip-in { grid-template-columns: 1fr; } }

/* ---------- mục ---------- */
.section { padding: clamp(56px, 8vw, 96px) 0; }
.section-alt { background: var(--page-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.sec-head { max-width: 720px; margin: 0 auto 40px; text-align: center; }
.sec-head.left { margin-left: 0; text-align: left; margin-bottom: 24px; }
.sec-head p:last-child { color: var(--muted); }

.cards { display: grid; gap: 20px; }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .cards-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .cards-3, .cards-2 { grid-template-columns: 1fr; } }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 24px; box-shadow: var(--shadow);
  transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-2px); }
.card p { color: var(--muted); margin: 0; font-size: 16px; }
.card h3 { margin-top: 16px; }
.card .ico { width: 48px; height: 48px; padding: 11px; border-radius: var(--r-md); background: var(--ico-bg); color: var(--ico); }
.cards.mini .card { padding: 18px; }
.cards.mini h3 { font-size: 17px; margin: 10px 0 4px; }
.cards.mini p { font-size: 15px; }
.cards.mini .ico { width: 40px; height: 40px; padding: 9px; }
@media (max-width: 600px) { .cards.mini { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 380px) { .cards.mini { grid-template-columns: 1fr; } }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split-art { display: flex; justify-content: center; }
.split-art > .ico { width: min(240px, 60%); height: auto; padding: 40px; border-radius: 40px; background: var(--ico-bg); color: var(--ico); stroke-width: 1.2; }
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; gap: 32px; }
  .split-rev > :first-child { order: 2; }
}

.ticks { list-style: none; padding: 0; margin: 20px 0; display: grid; gap: 10px; }
/* Không dùng flex: chữ có <b>, <kbd>, <a> sẽ bị tách thành nhiều cột. */
.ticks li { position: relative; padding-left: 32px; }
.ticks .ico { position: absolute; left: 0; top: 3px; width: 22px; height: 22px; color: var(--green); stroke-width: 2.4; }
@media (prefers-color-scheme: dark) { .ticks .ico { color: var(--gold); } }
.ticks.big li { font-size: 18px; }

/* cây minh hoạ */
.treeart { width: 100%; max-width: 520px; height: auto; }
.treeart .tl { stroke: var(--tree-link); }
.treeart rect { stroke-width: 2; }
.treeart .o { fill: var(--other-fill); stroke: var(--other-edge); }
.treeart .m { fill: var(--male-fill); stroke: var(--male-edge); }
.treeart .f { fill: var(--female-fill); stroke: var(--female-edge); }
.treeart text { fill: var(--ink); font: 500 15px Roboto, sans-serif; text-anchor: middle; }

/* các bước */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.steps li { background: var(--card); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 24px; position: relative; }
.steps p { color: var(--muted); margin: 0; font-size: 16px; }
.steps h3 { margin-top: 14px; }
.step-n {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--maroon-light); color: #FFFFFF; font-weight: 700; font-size: 18px; flex: none;
}
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

.timeline { list-style: none; padding: 0; margin: 0; }
.timeline > li { display: grid; grid-template-columns: 40px 1fr; gap: 20px; padding-bottom: 36px; position: relative; }
.timeline > li:not(:last-child)::before { content: ""; position: absolute; left: 19px; top: 44px; bottom: 4px; width: 2px; background: var(--border); }
.timeline h2 { font-size: clamp(21px, 2.6vw, 26px); margin-top: 4px; }
.note { font-size: 15px; color: var(--muted); background: var(--card); border-left: 3px solid var(--gold); padding: 10px 14px; border-radius: 0 var(--r-sm) var(--r-sm) 0; }
@media (max-width: 480px) { .timeline > li { grid-template-columns: 1fr; gap: 8px; } .timeline > li::before { display: none; } }

/* đầu trang con */
.page-head {
  background: linear-gradient(160deg, var(--hero-a), var(--hero-b));
  color: #FFFFFF; padding: clamp(48px, 7vw, 80px) 0;
}
.page-head h1 { color: #FFFFFF; }
.page-head .lead { color: rgba(255, 255, 255, .88); margin: 0; }
.notfound { min-height: 50vh; display: flex; align-items: center; }

/* hỏi đáp */
.faq h2 { margin: 40px 0 16px; font-size: 24px; }
.faq h2:first-child { margin-top: 0; }
.faq details { background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md); margin-bottom: 10px; }
.faq summary {
  cursor: pointer; list-style: none; padding: 16px 48px 16px 20px; font-weight: 600; position: relative; min-height: 48px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%); font-size: 24px; font-weight: 400; color: var(--accent); }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 20px 16px; margin: 0; color: var(--muted); }
.faq-more { margin-top: 32px; text-align: center; }

.contact-card { display: flex; flex-direction: column; }
.contact-card p { flex: 1; margin-bottom: 20px; }
.contact-card .btn { align-self: flex-start; }
.contact-mail { font-size: 18px; }

/* lời kêu gọi cuối trang */
.cta { background: linear-gradient(160deg, var(--hero-a), var(--hero-b)); color: #FFFFFF; padding: clamp(56px, 8vw, 88px) 0; text-align: center; }
.cta h2 { color: #FFFFFF; max-width: 760px; margin-left: auto; margin-right: auto; }
.cta p { color: rgba(255, 255, 255, .88); }
.cta .store-row { justify-content: center; }
.cta .btn { margin: 6px; }

/* chân trang */
.footer { background: #2A0F0D; color: rgba(255, 255, 255, .8); padding: 56px 0 calc(24px + env(safe-area-inset-bottom)); font-size: 15px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; }
.footer h2 { color: var(--gold); font-size: 14px; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 12px; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.footer a { color: rgba(255, 255, 255, .85); text-decoration: none; display: inline-block; padding: 3px 0; }
.footer a:hover { color: var(--gold-pale); text-decoration: underline; }
.footer-brand p { max-width: 320px; margin-top: 12px; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .12); color: rgba(255, 255, 255, .6); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }
@media (max-width: 380px) { .footer-grid { grid-template-columns: 1fr; } }

.ico { display: inline-block; vertical-align: middle; }

/* ---------- đổi ngôn ngữ ---------- */
.nav ul.langs { gap: 0; margin-left: 4px; padding-left: 8px; border-left: 1px solid rgba(255, 255, 255, .2); }
.nav ul.langs a { padding: 6px 8px; font-size: 14px; color: rgba(255, 255, 255, .78); }
.nav ul.langs a[aria-current="true"] { color: var(--gold-pale); font-weight: 700; box-shadow: none; }
@media (max-width: 900px) {
  .js .nav ul.langs { flex-direction: row; flex-wrap: wrap; margin: 12px 0 0; padding: 0; border: 0; gap: 8px; }
  .js .nav ul.langs a { border: 1px solid rgba(255, 255, 255, .25); border-radius: var(--r-sm); padding: 8px 14px; font-size: 16px; }
  .js .nav ul.langs a[aria-current="true"] { border-color: var(--gold); padding-left: 14px; box-shadow: none; }
}
.langs-foot { list-style: none; margin: 0; padding: 0; display: flex; gap: 14px; }
.langs-foot a[aria-current="true"] { color: var(--gold-pale); font-weight: 700; }

/* Chữ Hoa: Roboto không có chữ Hán, dùng font hệ thống; không viết hoa / giãn chữ. */
:lang(zh) body { font-family: Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans SC", sans-serif; }
:lang(zh) .eyebrow { letter-spacing: .04em; }

/* ---------- trang văn bản: chính sách, điều khoản, hỗ trợ ---------- */
.doc { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 48px; align-items: start; }
.doc-toc { position: sticky; top: 88px; font-size: 15px; }
.doc-toc b { display: block; color: var(--accent); margin-bottom: 8px; font-size: 13px; text-transform: uppercase; letter-spacing: .06em; }
.doc-toc ol { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.doc-toc a { color: var(--muted); text-decoration: none; }
.doc-toc a:hover { color: var(--link); text-decoration: underline; }
.doc-body { max-width: 760px; }
.doc-body h2 { font-size: clamp(21px, 2.4vw, 25px); margin: 40px 0 12px; scroll-margin-top: 88px; }
.doc-body h2:first-child { margin-top: 0; }
.doc-body h3 { font-size: 18px; margin: 20px 0 6px; color: var(--ink); }
.doc-body p, .doc-body li { color: var(--ink); }
.doc-body ul { padding-left: 22px; margin: 0 0 1em; display: grid; gap: 6px; }
.doc-body table { width: 100%; border-collapse: collapse; margin: 8px 0 20px; font-size: 15px; background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md); overflow: hidden; display: block; overflow-x: auto; }
.doc-body th, .doc-body td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--border); }
.doc-body th { background: var(--page-alt); color: var(--accent); font-weight: 600; white-space: nowrap; }
.doc-body tr:last-child td { border-bottom: 0; }
.doc-meta { color: var(--muted); font-size: 15px; margin-top: 8px; }
.page-head .doc-meta { color: rgba(255, 255, 255, .78); }
.callout { background: var(--highlight, #FFF6E0); border: 1px solid var(--border); border-left: 4px solid var(--gold); border-radius: var(--r-md); padding: 16px 20px; margin: 0 0 24px; }
@media (prefers-color-scheme: dark) { .callout { background: #3B2F1E; } }
.callout p:last-child { margin: 0; }
@media (max-width: 900px) {
  .doc { grid-template-columns: 1fr; gap: 24px; }
  .doc-toc { position: static; background: var(--card); border: 1px solid var(--border); border-radius: var(--r-md); padding: 16px 20px; }
}