/* =====================================================================
   Nếp Sao — header, footer, trang chủ, bảng giá.
   Bảng màu theo thiết kế Bảng giá (ngọc bích + vàng hoàng kim, nền giấy).
   ===================================================================== */
:root {
  --ns-parchment: #fbf9f6;
  --ns-paper: #f5f3f0;
  --ns-paper2: #f7f4ee;
  --ns-jade: #1b4332;
  --ns-jade-dark: #012d1d;
  --ns-jade-deep: #163b2c;
  --ns-gold: #c59b27;
  --ns-gold-soft: #b28d57;
  --ns-gold-light: #fef3c7;
  --ns-gold-dark: #7a582f;
  --ns-cinnabar: #b91c1c;
  --ns-cinnabar-bg: #fef2f2;
  --ns-ink: #1c1917;
  --ns-ink-light: #57534e;
  --ns-muted: #68706b;
  --ns-border: #e7e5e4;
  --ns-border-light: #f0ece6;
  --ns-border-warm: #eae6de;
  --ns-border-dark: #d9d2c5;
  --ns-serif: "Noto Serif", Georgia, "Times New Roman", serif;
  --ns-sans: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --ns-shadow-card: 0 2px 12px -2px rgba(27, 67, 50, .05);
  --ns-shadow-hover: 0 12px 28px -6px rgba(27, 67, 50, .09);
  --ns-shadow-featured: 0 16px 36px -8px rgba(197, 155, 39, .16), 0 0 0 1.5px rgba(197, 155, 39, .4);
  --ns-wrap: 1200px;
}

/* ---------- Nền chung ---------- */
body {
  background-color: var(--ns-parchment);
  color: var(--ns-ink);
  font-family: var(--ns-sans);
  -webkit-font-smoothing: antialiased;
}
body.ns-page {
  background-image:
    radial-gradient(1.5px 1.5px at 60px 80px, rgba(27, 67, 50, .08), transparent),
    radial-gradient(2px 2px at 160px 220px, rgba(197, 155, 39, .12), transparent),
    radial-gradient(1.5px 1.5px at 320px 140px, rgba(27, 67, 50, .06), transparent),
    radial-gradient(2px 2px at 520px 360px, rgba(197, 155, 39, .09), transparent),
    radial-gradient(1.5px 1.5px at 720px 90px, rgba(27, 67, 50, .07), transparent),
    radial-gradient(2px 2px at 920px 280px, rgba(197, 155, 39, .11), transparent),
    radial-gradient(1.5px 1.5px at 1120px 180px, rgba(27, 67, 50, .08), transparent),
    radial-gradient(2px 2px at 1340px 320px, rgba(197, 155, 39, .1), transparent);
  background-size: 1400px 480px;
}
::selection { background: #d1fae5; color: var(--ns-jade-dark); }
.ns-site { min-height: 100vh; display: flex; flex-direction: column; }
.ns-main { flex: 1 0 auto; outline: none; }
.ns-skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: #fff; padding: 8px 14px; border-radius: 8px; color: var(--ns-jade); }
.ns-skip:focus { left: 12px; }
.ns-wrap { max-width: var(--ns-wrap); margin: 0 auto; padding: 0 16px; }
@media (min-width: 640px) { .ns-wrap { padding: 0 24px; } }
.ns-site a:focus-visible, .ns-site button:focus-visible, .ns-site summary:focus-visible { outline: 2px solid var(--ns-gold); outline-offset: 3px; border-radius: 6px; }
.ns-site svg { display: block; }

/* ---------- Nút ---------- */
.ns-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-family: var(--ns-sans); font-weight: 600; font-size: 14px; line-height: 1.2; border-radius: 10px; padding: 14px 24px; text-decoration: none !important; transition: background-color .2s, border-color .2s, color .2s, box-shadow .2s, transform .2s; cursor: pointer; }
.ns-btn--jade { background: var(--ns-jade-deep); color: #fff !important; box-shadow: 0 4px 10px -2px rgba(22, 59, 44, .3); }
.ns-btn--jade:hover { background: #0f291f; color: #fff !important; }
.ns-btn--ghost { background: #fff; color: var(--ns-ink) !important; border: 1px solid var(--ns-border-dark); }
.ns-btn--ghost:hover { border-color: var(--ns-gold-soft); background: var(--ns-paper2); }
.ns-btn .ns-arrow { transition: transform .2s; }
.ns-btn:hover .ns-arrow { transform: translateX(4px); }

/* ---------- Logo ---------- */
.ns-brand { display: inline-flex; align-items: center; gap: 14px; text-decoration: none !important; color: inherit; }
.ns-brand__logo { width: 40px; height: 40px; border-radius: 8px; border: 1px solid rgba(27, 67, 50, .2); background: rgba(236, 253, 245, .8); display: flex; align-items: center; justify-content: center; color: var(--ns-jade); box-shadow: 0 1px 2px rgba(0, 0, 0, .05); transition: border-color .3s, background-color .3s; flex: none; }
.ns-brand__logo svg { width: 20px; height: 20px; transition: transform .5s; }
.ns-brand:hover .ns-brand__logo { border-color: rgba(27, 67, 50, .6); background: rgba(209, 250, 229, .6); }
.ns-brand:hover .ns-brand__logo svg { transform: rotate(45deg); }
.ns-brand__logo--img { background: #fff; overflow: hidden; padding: 2px; }
.ns-brand__img { width: 100%; height: 100%; object-fit: contain; }
.ns-brand__text { display: flex; flex-direction: column; }
.ns-brand__name { font-family: var(--ns-serif); font-weight: 700; font-size: 18px; letter-spacing: .1em; color: var(--ns-jade-dark); line-height: 1.25; }
.ns-brand__tag { font-size: 10px; letter-spacing: .25em; text-transform: uppercase; color: var(--ns-ink-light); font-weight: 500; }
.ns-brand--footer .ns-brand__logo { width: 32px; height: 32px; background: #ecfdf5; }
.ns-brand--footer .ns-brand__logo svg { width: 16px; height: 16px; }
.ns-brand--footer .ns-brand__name { font-size: 16px; }

/* ---------- Header ---------- */
.ns-header { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .9); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); border-bottom: 1px solid var(--ns-border); }
.admin-bar .ns-header { top: 32px; }
@media (max-width: 782px) { .admin-bar .ns-header { top: 0; } }
.ns-header__inner { max-width: 1280px; margin: 0 auto; padding: 0 16px; height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
@media (min-width: 640px) { .ns-header__inner { padding: 0 24px; } }
@media (min-width: 1024px) { .ns-header__inner { padding: 0 32px; } }
.ns-nav ul { list-style: none; margin: 0; padding: 0; }
.ns-nav > ul { display: flex; align-items: center; gap: 32px; }
.ns-nav li { position: relative; margin: 0; }
.ns-nav a { font-size: 14px; font-weight: 500; color: var(--ns-ink-light); text-decoration: none !important; transition: color .2s; }
.ns-nav a:hover { color: var(--ns-jade); }
.ns-nav .current-menu-item > a, .ns-nav .current_page_item > a, .ns-nav .current-menu-ancestor > a { color: var(--ns-jade); font-weight: 600; position: relative; }
.ns-nav > ul > .current-menu-item > a::after, .ns-nav > ul > .current_page_item > a::after, .ns-nav > ul > .current-menu-ancestor > a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -8px; height: 2px; background: var(--ns-jade); }
.ns-nav .sub-menu { position: absolute; top: 100%; left: -14px; min-width: 220px; padding: 8px !important; margin-top: 14px !important; background: #fff; border: 1px solid var(--ns-border); border-radius: 12px; box-shadow: var(--ns-shadow-hover); opacity: 0; visibility: hidden; transform: translateY(6px); transition: opacity .2s, transform .2s, visibility .2s; }
.ns-nav .sub-menu::before { content: ""; position: absolute; left: 0; right: 0; top: -16px; height: 16px; }
.ns-nav li:hover > .sub-menu, .ns-nav li:focus-within > .sub-menu { opacity: 1; visibility: visible; transform: none; }
.ns-nav .sub-menu a { display: block; padding: 8px 12px; border-radius: 8px; }
.ns-nav .sub-menu a:hover { background: var(--ns-paper); }
.ns-nav .menu-item-has-children > a::before { content: "▾"; order: 2; float: right; margin-left: 6px; font-size: 10px; opacity: .6; }
.ns-nav__mobile-actions { display: none; }
.ns-header__actions { display: flex; align-items: center; gap: 16px; }
.ns-header__login { font-size: 14px; font-weight: 500; color: var(--ns-ink-light); padding: 6px 8px; text-decoration: none !important; transition: color .2s; }
.ns-header__login:hover { color: var(--ns-jade); }
.ns-header__cta { display: none; align-items: center; padding: 8px 16px; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: #fff !important; background: var(--ns-jade); border-radius: 999px; text-decoration: none !important; box-shadow: 0 1px 2px rgba(0, 0, 0, .05); transition: background-color .3s, box-shadow .3s; white-space: nowrap; }
.ns-header__cta:hover { background: var(--ns-jade-dark); box-shadow: 0 2px 6px rgba(0, 0, 0, .12); }
@media (min-width: 640px) { .ns-header__cta { display: inline-flex; } }
.ns-header__toggle { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--ns-border); background: #fff; padding: 0; flex-direction: column; align-items: center; justify-content: center; gap: 4px; cursor: pointer; }
.ns-header__toggle span { width: 18px; height: 2px; border-radius: 2px; background: var(--ns-jade); transition: transform .25s, opacity .25s; }
.ns-header__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.ns-header__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.ns-header__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 899px) {
  .ns-header__toggle { display: inline-flex; }
  .ns-header__login { display: none; }
  .ns-nav { position: fixed; left: 0; right: 0; top: 80px; bottom: 0; background: var(--ns-parchment); padding: 20px 20px 32px; overflow-y: auto; transform: translateX(100%); visibility: hidden; transition: transform .3s ease, visibility .3s; border-top: 1px solid var(--ns-border); }
  .admin-bar .ns-nav { top: 126px; }
  .ns-nav.is-open { transform: none; visibility: visible; }
  .ns-nav > ul { flex-direction: column; align-items: stretch; gap: 0; }
  .ns-nav > ul > li { border-bottom: 1px solid var(--ns-border-light); }
  .ns-nav a { display: block; padding: 14px 4px; font-size: 16px; }
  .ns-nav > ul > .current-menu-item > a::after, .ns-nav > ul > .current_page_item > a::after, .ns-nav > ul > .current-menu-ancestor > a::after { display: none; }
  .ns-nav .sub-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; margin: 0 0 8px !important; padding: 0 0 0 14px !important; background: transparent; min-width: 0; }
  .ns-nav .sub-menu a { padding: 10px 4px; font-size: 15px; }
  .ns-nav .menu-item-has-children > a::before { display: none; }
  .ns-nav__mobile-actions { display: flex; flex-direction: column; gap: 10px; margin-top: 24px; }
  .ns-nav__mobile-actions .ns-btn { width: 100%; }
  html.ns-menu-open { overflow: hidden; }
}
@media (max-width: 782px) { .admin-bar .ns-nav { top: 80px; } }
@media (max-width: 639px) { .ns-header__actions { gap: 8px; } }

/* ---------- Footer ---------- */
.ns-footer { position: relative; z-index: 2; border-top: 1px solid var(--ns-border); background: var(--ns-paper); color: var(--ns-ink-light); font-size: 12px; padding: 56px 0; margin-top: auto; }
.ns-footer__inner { max-width: 1280px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 640px) { .ns-footer__inner { padding: 0 24px; } }
@media (min-width: 1024px) { .ns-footer__inner { padding: 0 32px; } }
.ns-footer__grid { display: grid; grid-template-columns: 1fr; gap: 32px; margin-bottom: 48px; }
@media (min-width: 768px) { .ns-footer__grid { grid-template-columns: repeat(4, 1fr); } }
.ns-footer__brand .ns-brand { margin-bottom: 12px; }
.ns-footer__motto { font-family: var(--ns-serif); font-style: italic; font-size: 12px; color: #57534e; line-height: 1.6; margin: 0 0 12px; }
.ns-footer__note { font-size: 11px; color: #78716c; line-height: 1.5; margin: 0; }
.ns-footer__col h4 { font-family: var(--ns-serif); font-weight: 600; font-size: 14px; color: var(--ns-jade-dark); margin: 0 0 12px; }
.ns-footer__links { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.ns-footer__links li { margin: 0; }
.ns-footer__links a { color: var(--ns-ink-light); text-decoration: none !important; transition: color .2s; }
.ns-footer__links a:hover { color: var(--ns-jade); }
.ns-footer__bottom { padding-top: 32px; border-top: 1px solid var(--ns-border); display: flex; flex-direction: column; align-items: center; justify-content: space-between; gap: 16px; font-size: 11px; color: #78716c; }
.ns-footer__bottom p { margin: 0; }
@media (min-width: 640px) { .ns-footer__bottom { flex-direction: row; } }
.ns-footer__status { display: flex; align-items: center; gap: 8px; }
.ns-footer__status span { width: 6px; height: 6px; border-radius: 50%; background: #059669; }

/* ---------- Thành phần chung của trang ---------- */
.ns-eyebrow { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: .05em; text-transform: uppercase; color: var(--ns-gold-soft); }
.ns-h2 { font-family: var(--ns-serif); font-weight: 700; font-size: 30px; line-height: 1.2; color: var(--ns-ink); margin: 4px 0 0; }
@media (min-width: 640px) { .ns-h2 { font-size: 36px; } }
.ns-section { margin-bottom: 96px; }
.ns-page-content { max-width: 960px; margin: 0 auto 80px; padding: 0 20px; }

/* =====================================================================
   TRANG CHỦ
   ===================================================================== */
.ns-home { font-family: var(--ns-sans); }
.ns-home h1, .ns-home h2, .ns-home h3, .ns-home h4 { letter-spacing: normal; }

/* Hero */
.ns-hero { position: relative; overflow: hidden; padding: 40px 0 64px; }
@media (min-width: 768px) { .ns-hero { padding: 64px 0 96px; } }
.ns-hero__ink { position: absolute; right: 0; top: 0; width: 50%; height: 100%; opacity: .2; pointer-events: none; z-index: 0; }
.ns-hero__ink svg { width: 100%; height: 100%; }
.ns-hero__grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr; gap: 48px; align-items: center; }
@media (min-width: 1024px) { .ns-hero__grid { grid-template-columns: 7fr 5fr; } }
.ns-hero__copy { display: flex; flex-direction: column; align-items: flex-start; gap: 24px; }
.ns-pill { display: inline-flex; align-items: center; padding: 6px 14px; border-radius: 999px; background: rgba(234, 222, 203, .4); border: 1px solid rgba(178, 141, 87, .3); font-size: 12px; font-weight: 500; letter-spacing: .03em; color: var(--ns-jade-deep); }
.ns-hero h1 { font-family: var(--ns-serif); font-weight: 700; font-size: 36px; line-height: 1.18; letter-spacing: -.01em; color: #1d211e; margin: 0; }
.ns-hero h1 span { color: var(--ns-jade-deep); }
@media (min-width: 640px) { .ns-hero h1 { font-size: 48px; } }
@media (min-width: 1024px) { .ns-hero h1 { font-size: 60px; } }
.ns-hero__lead { font-size: 16px; line-height: 1.7; color: var(--ns-muted); max-width: 36rem; margin: 0; }
@media (min-width: 640px) { .ns-hero__lead { font-size: 18px; } }
.ns-hero__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; padding-top: 8px; }
.ns-link-underline { font-weight: 500; color: #1d211e !important; text-decoration: underline !important; text-underline-offset: 8px; text-decoration-color: var(--ns-border-dark) !important; transition: color .2s, text-decoration-color .2s; }
.ns-link-underline:hover { color: var(--ns-jade-deep) !important; text-decoration-color: var(--ns-jade-deep) !important; }
.ns-trust { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ns-muted); }
.ns-trust svg { width: 16px; height: 16px; color: #059669; }

.ns-astro-wrap { display: flex; justify-content: center; align-items: center; }
.ns-astro { position: relative; width: 288px; height: 288px; }
@media (min-width: 640px) { .ns-astro { width: 352px; height: 352px; } }
@media (min-width: 768px) { .ns-astro { width: 384px; height: 384px; } }
.ns-astro__glow { position: absolute; inset: 0; border-radius: 50%; background: linear-gradient(to top right, rgba(209, 250, 229, .4), rgba(255, 251, 235, .5), rgba(236, 253, 245, .3)); filter: blur(40px); z-index: -1; }
.ns-astro__orbit { position: absolute; inset: 16px; border-radius: 50%; border: 1px dashed rgba(178, 141, 87, .4); }
.ns-astro__orbit2 { position: absolute; inset: 48px; border-radius: 50%; border: 1px solid rgba(178, 141, 87, .2); }
.ns-astro__disc { position: relative; width: 100%; height: 100%; border-radius: 50%; border: 1px solid rgba(178, 141, 87, .4); padding: 24px; background: rgba(255, 255, 255, .4); -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); box-shadow: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .1); overflow: hidden; display: flex; align-items: center; justify-content: center; }
.ns-astro__disc > svg { width: 100%; height: 100%; }
.ns-astro__bamboo { position: absolute; right: -16px; top: -24px; width: 144px; height: 192px; opacity: .85; pointer-events: none; }
.ns-astro__badge { position: absolute; left: 20px; bottom: 20px; display: flex; align-items: center; gap: 6px; background: rgba(255, 255, 255, .9); border: 1px solid var(--ns-border-warm); padding: 6px 12px; border-radius: 999px; box-shadow: 0 1px 2px rgba(0, 0, 0, .05); font-family: var(--ns-serif); font-size: 11px; color: var(--ns-jade-deep); }
.ns-astro__badge b { color: var(--ns-gold-soft); font-weight: 400; }

/* Dải giá trị */
.ns-values { background: #fff; border: 1px solid var(--ns-border-warm); border-radius: 12px; padding: 16px; box-shadow: 0 1px 2px rgba(0, 0, 0, .05); display: grid; grid-template-columns: 1fr; }
@media (min-width: 640px) { .ns-values { padding: 24px; } }
@media (min-width: 768px) { .ns-values { grid-template-columns: repeat(3, 1fr); } }
.ns-value { display: flex; align-items: center; gap: 16px; padding: 16px 0; border-top: 1px solid var(--ns-border-warm); }
.ns-value:first-child { border-top: 0; padding-top: 0; }
@media (min-width: 768px) {
  .ns-value { padding: 0 16px; border-top: 0; border-left: 1px solid var(--ns-border-warm); }
  .ns-value:first-child { border-left: 0; padding-left: 0; }
}
.ns-value__icon { width: 48px; height: 48px; border-radius: 50%; background: var(--ns-paper2); border: 1px solid var(--ns-border-warm); display: flex; align-items: center; justify-content: center; color: var(--ns-jade-deep); flex: none; }
.ns-value__icon svg { width: 20px; height: 20px; }
.ns-value h4 { font-family: var(--ns-serif); font-weight: 700; font-size: 14px; color: #1d211e; margin: 0; }
.ns-value p { font-size: 12px; color: var(--ns-muted); margin: 2px 0 0; }

/* 3 hướng khám phá */
.ns-tracks__head { margin-bottom: 40px; }
.ns-tracks { display: grid; grid-template-columns: 1fr; gap: 24px; }
@media (min-width: 768px) { .ns-tracks { grid-template-columns: repeat(3, 1fr); } }
.ns-track { position: relative; overflow: hidden; display: flex; flex-direction: column; justify-content: space-between; min-height: 220px; background: #fff; border: 1px solid var(--ns-border-warm); border-radius: 12px; padding: 24px; text-decoration: none !important; color: inherit; transition: border-color .3s, box-shadow .3s; }
.ns-track:hover { border-color: rgba(178, 141, 87, .7); box-shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1); }
.ns-track__body, .ns-track__go { position: relative; z-index: 1; }
.ns-track__num { font-family: var(--ns-serif); font-size: 12px; font-weight: 600; color: var(--ns-gold-soft); }
.ns-track h3 { font-family: var(--ns-serif); font-size: 24px; font-weight: 700; color: #1d211e; margin: 4px 0 0; transition: color .2s; }
.ns-track:hover h3 { color: var(--ns-jade-deep); }
.ns-track p { font-size: 14px; color: var(--ns-muted); margin: 4px 0 0; }
.ns-track__go { padding-top: 32px; color: var(--ns-jade-deep); font-weight: 500; font-size: 14px; }
.ns-track__go span { display: inline-block; transition: transform .2s; }
.ns-track:hover .ns-track__go span { transform: translateX(6px); }
.ns-track__art { position: absolute; right: 0; bottom: 0; width: 144px; height: 144px; opacity: .35; pointer-events: none; transition: opacity .3s; }
.ns-track:hover .ns-track__art { opacity: .6; }
.ns-track__art svg { width: 100%; height: 100%; }

/* Hai cách đọc */
.ns-how { background: rgba(247, 244, 238, .7); border: 1px solid var(--ns-border-warm); border-radius: 16px; padding: 24px; display: grid; grid-template-columns: 1fr; gap: 40px; align-items: center; }
@media (min-width: 640px) { .ns-how { padding: 40px; } }
@media (min-width: 1024px) { .ns-how { padding: 48px; grid-template-columns: 7fr 5fr; } }
.ns-mock { background: #fff; border: 1px solid var(--ns-border-warm); border-radius: 12px; box-shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1); overflow: hidden; }
.ns-mock__tabs { display: flex; border-bottom: 1px solid var(--ns-border-warm); background: rgba(247, 244, 238, .4); }
.ns-mock__tab { display: flex; align-items: center; gap: 8px; padding: 12px 20px; font-size: 12px; font-weight: 500; color: var(--ns-muted); background: none; border: 0; border-bottom: 2px solid transparent; cursor: pointer; font-family: inherit; }
@media (min-width: 640px) { .ns-mock__tab { font-size: 14px; } }
.ns-mock__tab svg { width: 16px; height: 16px; }
.ns-mock__tab.is-active { color: var(--ns-jade-deep); border-bottom-color: var(--ns-jade-deep); background: #fff; }
.ns-mock__tab:hover { color: #1d211e; }
.ns-mock__body { padding: 20px; display: grid; grid-template-columns: 4fr 8fr; gap: 16px; }
@media (min-width: 640px) { .ns-mock__body { padding: 24px; } }
.ns-mock__side { border-right: 1px solid var(--ns-border-warm); padding-right: 12px; font-size: 12px; display: grid; align-content: start; gap: 6px; }
.ns-mock__side b { display: flex; align-items: center; gap: 6px; color: var(--ns-jade-deep); padding-bottom: 4px; }
.ns-mock__side b::before { content: ""; width: 4px; height: 14px; border-radius: 4px; background: var(--ns-jade-deep); }
.ns-mock__side span { color: var(--ns-muted); padding: 4px 0 4px 8px; }
.ns-mock__title { font-size: 12px; font-weight: 600; color: #1d211e; margin-bottom: 8px; }
.ns-mock__lines { display: grid; gap: 6px; margin-bottom: 16px; }
.ns-mock__lines i { display: block; height: 8px; border-radius: 999px; background: var(--ns-paper2); }
.ns-mock__lines i:nth-child(2) { width: 80%; }
.ns-mock__lines i:nth-child(3) { width: 66%; }
/* Chỉ áp dụng cho hình minh hoạ ở trang chủ (.ns-mock), tránh đè lên lưới 12 cung
   của trang kết quả (cũng dùng class .ns-board). */
.ns-mock .ns-board { aspect-ratio: 1; border: 1px solid var(--ns-border-warm); border-radius: 4px; background: rgba(247, 244, 238, .3); padding: 8px; display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(4, 1fr); gap: 4px; font-size: 9px; text-align: center; }
.ns-mock .ns-board span { display: flex; align-items: center; justify-content: center; background: #fff; border: 1px solid rgba(234, 230, 222, .7); border-radius: 4px; color: var(--ns-muted); }
.ns-mock .ns-board .ns-board__center { grid-column: 2 / 4; grid-row: 2 / 4; flex-direction: column; background: rgba(255, 251, 235, .5); border-color: rgba(178, 141, 87, .3); }
.ns-mock .ns-board__center b { color: var(--ns-gold-soft); font-size: 12px; font-weight: 400; }
.ns-mock .ns-board__center em { font-style: normal; font-family: var(--ns-serif); font-weight: 700; font-size: 10px; color: var(--ns-jade-deep); margin-top: 2px; }
.ns-mock__note { margin: 0 20px 20px; padding: 12px; border-radius: 8px; background: rgba(236, 253, 245, .7); border: 1px solid rgba(167, 243, 208, .5); display: flex; align-items: flex-start; gap: 10px; font-size: 12px; line-height: 1.6; color: var(--ns-jade-deep); }
.ns-mock__note svg { width: 16px; height: 16px; color: var(--ns-gold-soft); flex: none; margin-top: 2px; }
.ns-how__copy { display: flex; flex-direction: column; justify-content: center; gap: 24px; }
.ns-how__copy > div > p { font-size: 14px; color: var(--ns-muted); margin: 8px 0 0; line-height: 1.7; }
.ns-steps { display: grid; gap: 20px; padding-top: 8px; }
.ns-step { display: flex; align-items: flex-start; gap: 16px; }
.ns-step__num { width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--ns-border-dark); background: #fff; color: var(--ns-gold-soft); font-family: var(--ns-serif); font-weight: 700; font-size: 12px; display: flex; align-items: center; justify-content: center; flex: none; box-shadow: 0 1px 2px rgba(0, 0, 0, .05); }
.ns-step h4 { font-family: var(--ns-serif); font-weight: 700; font-size: 16px; color: #1d211e; margin: 0; }
.ns-step p { font-size: 12px; color: var(--ns-muted); margin: 2px 0 0; }
.ns-textlink { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 500; color: var(--ns-jade-deep) !important; text-decoration: none !important; transition: color .2s; }
.ns-textlink u { text-underline-offset: 4px; }
.ns-textlink:hover { color: var(--ns-gold-soft) !important; }
.ns-textlink span { transition: transform .2s; }
.ns-textlink:hover span { transform: translateX(4px); }

/* Thư viện */
.ns-lib__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 32px; padding-bottom: 12px; border-bottom: 1px solid var(--ns-border-warm); }
.ns-lib__head h2 { font-family: var(--ns-serif); font-weight: 700; font-size: 24px; color: #1d211e; margin: 0; }
@media (min-width: 640px) { .ns-lib__head h2 { font-size: 30px; } }
.ns-lib__all { display: inline-flex; gap: 4px; font-size: 14px; font-weight: 500; color: #1d211e !important; text-decoration: none !important; white-space: nowrap; }
.ns-lib__all:hover { color: var(--ns-jade-deep) !important; }
.ns-lib__all span { transition: transform .2s; }
.ns-lib__all:hover span { transform: translateX(4px); }
.ns-lib { display: grid; grid-template-columns: 1fr; gap: 24px; }
@media (min-width: 768px) { .ns-lib { grid-template-columns: repeat(3, 1fr); } }
.ns-article { display: flex; flex-direction: column; justify-content: space-between; background: #fff; border: 1px solid var(--ns-border-warm); border-radius: 12px; overflow: hidden; box-shadow: 0 1px 2px rgba(0, 0, 0, .05); transition: box-shadow .3s; text-decoration: none !important; color: inherit; }
.ns-article:hover { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1); }
.ns-article__media { height: 176px; overflow: hidden; display: flex; align-items: center; justify-content: center; border-bottom: 1px solid var(--ns-border-warm); background: #f4f1ea; }
.ns-article__media.is-dark { background: #143026; }
.ns-article__media.is-brass { background: #f1ede4; }
.ns-article__media svg, .ns-article__media img { width: 100%; height: 100%; object-fit: cover; opacity: .85; transition: transform .5s; }
.ns-article__media img { opacity: 1; }
.ns-article:hover .ns-article__media svg, .ns-article:hover .ns-article__media img { transform: scale(1.05); }
.ns-article__body { padding: 20px; }
.ns-article__cat { font-size: 11px; font-weight: 600; letter-spacing: .05em; text-transform: uppercase; color: var(--ns-gold-soft); }
.ns-article h3 { font-family: var(--ns-serif); font-weight: 700; font-size: 18px; color: #1d211e; margin: 4px 0 0; transition: color .2s; }
.ns-article:hover h3 { color: var(--ns-jade-deep); }
.ns-article p { font-size: 14px; line-height: 1.7; color: var(--ns-muted); margin: 8px 0 0; }
.ns-article__go { padding: 4px 20px 20px; color: var(--ns-jade-deep); font-weight: 500; font-size: 14px; }
.ns-article__go span { display: inline-block; transition: transform .2s; }
.ns-article:hover .ns-article__go span { transform: translateX(4px); }

/* CTA gói luận giải */
.ns-cta { position: relative; overflow: hidden; background: #f5f2ea; border: 1px solid var(--ns-border-warm); border-radius: 12px; padding: 32px; display: flex; flex-direction: column; align-items: flex-start; justify-content: space-between; gap: 24px; box-shadow: 0 1px 2px rgba(0, 0, 0, .05); }
@media (min-width: 640px) { .ns-cta { padding: 40px; } }
@media (min-width: 768px) { .ns-cta { flex-direction: row; align-items: center; } }
.ns-cta__ink { position: absolute; left: 0; top: 0; bottom: 0; width: 256px; opacity: .2; pointer-events: none; }
.ns-cta__ink svg { height: 100%; width: auto; }
.ns-cta__copy, .ns-cta__action { position: relative; z-index: 1; }
.ns-cta__copy { max-width: 36rem; }
.ns-cta h3 { font-family: var(--ns-serif); font-weight: 700; font-size: 24px; line-height: 1.35; color: #1d211e; margin: 0; }
@media (min-width: 640px) { .ns-cta h3 { font-size: 30px; } }
.ns-cta p { font-size: 14px; color: var(--ns-muted); margin: 6px 0 0; }
.ns-cta__action { flex: none; }

/* FAQ */
.ns-faq { max-width: 896px; margin: 0 auto 96px; padding: 0 16px; }
@media (min-width: 640px) { .ns-faq { padding: 0 24px; } }
.ns-faq__head { margin-bottom: 32px; }
.ns-faq__list { display: grid; gap: 12px; }
.ns-faq details { background: #fff; border: 1px solid var(--ns-border-warm); border-radius: 12px; }
.ns-faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px; cursor: pointer; list-style: none; user-select: none; color: #1d211e; }
.ns-faq summary::-webkit-details-marker { display: none; }
.ns-faq summary:hover { color: var(--ns-jade-deep); }
.ns-faq summary span:first-child { font-family: var(--ns-serif); font-weight: 600; font-size: 14px; }
@media (min-width: 640px) { .ns-faq summary span:first-child { font-size: 16px; } }
.ns-faq summary span:last-child { font-size: 20px; font-weight: 300; color: var(--ns-muted); transition: transform .2s; flex: none; }
.ns-faq details[open] summary span:last-child { transform: rotate(45deg); }
.ns-faq__answer { padding: 4px 20px 20px; margin-top: 4px; border-top: 1px solid rgba(234, 230, 222, .4); font-size: 14px; line-height: 1.7; color: var(--ns-muted); }
.ns-faq__answer p { margin: 12px 0 0; }

/* =====================================================================
   BẢNG GIÁ
   ===================================================================== */
.ns-pricing { position: relative; padding: 56px 16px 80px; }
@media (min-width: 640px) { .ns-pricing { padding-left: 24px; padding-right: 24px; } }
@media (min-width: 1024px) { .ns-pricing { padding-left: 32px; padding-right: 32px; } }
.ns-pricing__aura1, .ns-pricing__aura2 { position: absolute; border-radius: 50%; pointer-events: none; z-index: 0; }
.ns-pricing__aura1 { top: 40px; left: 50%; transform: translateX(-50%); width: min(720px, 100%); height: 360px; background: rgba(209, 250, 229, .4); filter: blur(120px); }
.ns-pricing__aura2 { top: 480px; right: 40px; width: min(500px, 70%); height: 320px; background: rgba(254, 243, 199, .4); filter: blur(140px); }
.ns-pricing__inner { position: relative; z-index: 1; max-width: 1480px; margin: 0 auto; }
.ns-pricing__head { text-align: center; max-width: 768px; margin: 0 auto 56px; }
.ns-pricing__pill { display: inline-flex; align-items: center; gap: 8px; padding: 4px 12px; border-radius: 999px; background: #ecfdf5; border: 1px solid rgba(27, 67, 50, .15); font-size: 11px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--ns-jade); margin-bottom: 14px; }
.ns-pricing__pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--ns-jade); }
.ns-pricing__head h1 { font-family: var(--ns-serif); font-weight: 600; font-size: 30px; line-height: 1.25; letter-spacing: -.01em; color: var(--ns-jade-dark); margin: 0 0 16px; }
@media (min-width: 640px) { .ns-pricing__head h1 { font-size: 36px; } }
@media (min-width: 1024px) { .ns-pricing__head h1 { font-size: 46px; } }
.ns-pricing__head p { font-size: 14px; line-height: 1.7; color: var(--ns-ink-light); margin: 0; }
@media (min-width: 640px) { .ns-pricing__head p { font-size: 16px; } }

.ns-plans { display: grid; grid-template-columns: 1fr; gap: 24px; align-items: stretch; }
@media (min-width: 768px) { .ns-plans { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1280px) { .ns-plans { grid-template-columns: repeat(var(--ns-cols, 4), 1fr); } }
.ns-plan { position: relative; display: flex; flex-direction: column; justify-content: space-between; border-radius: 16px; background: #fff; border: 1px solid var(--ns-border); padding: 28px; box-shadow: var(--ns-shadow-card); transition: box-shadow .3s, border-color .3s; }
@media (min-width: 1024px) { .ns-plan { padding: 32px; } }
.ns-plan:hover { box-shadow: var(--ns-shadow-hover); border-color: rgba(27, 67, 50, .3); }
.ns-plan.is-featured { background: #fafaf7; border: 2px solid rgba(197, 155, 39, .7); box-shadow: var(--ns-shadow-featured); transform: translateY(-10px); z-index: 2; }
@media (min-width: 1280px) { .ns-plan.is-featured { transform: translateY(-12px); } }
.ns-plan__flag { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); white-space: nowrap; background: var(--ns-jade); color: var(--ns-gold-light); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; font-weight: 700; padding: 4px 16px; border-radius: 999px; border: 1px solid rgba(197, 155, 39, .4); box-shadow: 0 4px 6px -1px rgba(0, 0, 0, .1); }
.ns-plan__head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.ns-plan.is-featured .ns-plan__head { margin-top: 4px; }
.ns-plan h3 { font-family: var(--ns-serif); font-weight: 700; font-size: 24px; color: var(--ns-jade-dark); margin: 0; line-height: 1.3; }
.ns-plan__badge { font-size: 11px; font-weight: 500; padding: 2px 8px; border-radius: 4px; background: #f5f5f4; color: #57534e; white-space: nowrap; }
.ns-plan__badge.is-jade { background: #ecfdf5; color: var(--ns-jade); }
.ns-plan__badge.is-gold { background: #fef3c7; color: var(--ns-gold-dark); border: 1px solid #fde68a; font-weight: 700; }
.ns-plan__badge.is-purple { background: #faf5ff; color: #6b21a8; }
.ns-plan__desc { font-size: 12px; line-height: 1.65; color: var(--ns-ink-light); min-height: 52px; margin: 0; }
.ns-plan__desc p { margin: 0; }
.ns-plan__free { margin: 28px 0; padding-bottom: 24px; border-bottom: 1px solid var(--ns-border-light); }
.ns-plan__free strong { font-family: var(--ns-serif); font-weight: 600; font-size: 30px; letter-spacing: -.01em; color: var(--ns-jade); }
@media (min-width: 1024px) { .ns-plan__free strong { font-size: 36px; } }
.ns-plan__free small { display: block; font-size: 11px; color: #a8a29e; margin-top: 4px; }
.ns-plan__price { margin: 24px 0 12px; }
.ns-plan__old { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.ns-plan__old s { font-family: var(--ns-serif); font-size: 12px; color: #a8a29e; }
.ns-plan__off { font-size: 10px; font-weight: 700; color: var(--ns-cinnabar); background: var(--ns-cinnabar-bg); border: 1px solid #fecaca; padding: 2px 6px; border-radius: 4px; }
.ns-plan__now { display: flex; align-items: baseline; }
.ns-plan__now strong { font-family: var(--ns-serif); font-weight: 700; font-size: 30px; color: var(--ns-jade-dark); }
@media (min-width: 1024px) { .ns-plan__now strong { font-size: 36px; } }
.ns-plan__now span { font-family: var(--ns-serif); font-weight: 600; font-size: 12px; color: var(--ns-gold-dark); margin-left: 4px; }
.ns-plan__quota { display: flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 500; color: var(--ns-jade); margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--ns-border-light); }
.ns-plan.is-featured .ns-plan__quota { color: var(--ns-jade-dark); font-weight: 600; border-bottom-color: rgba(253, 230, 138, .6); }
.ns-star { color: var(--ns-gold); font-family: var(--ns-serif); flex: none; }
.ns-plan__features { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; font-size: 12px; line-height: 1.4; color: #44403c; }
.ns-plan.is-featured .ns-plan__features { color: #292524; }
.ns-plan__features li { display: flex; align-items: flex-start; gap: 10px; margin: 0; }
.ns-plan__features .ns-star { font-size: 14px; margin-top: 1px; }
.ns-plan__features li.is-strong { font-weight: 500; color: var(--ns-jade-dark); }
.ns-plan__features li.is-highlight { font-weight: 500; color: var(--ns-jade-dark); background: rgba(255, 251, 235, .7); padding: 6px; margin: 0 -6px; border-radius: 4px; }
.ns-plan__foot { margin-top: 36px; padding-top: 12px; }
.ns-plan__btn { display: flex; align-items: center; justify-content: center; gap: 6px; width: 100%; padding: 12px 16px; border-radius: 999px; font-size: 12px; font-weight: 600; text-decoration: none !important; transition: background-color .2s, border-color .2s, color .2s, box-shadow .2s; line-height: 1.3; text-align: center; }
.ns-plan__btn span { font-family: var(--ns-serif); font-size: 14px; }
.ns-plan__btn.is-ghost { border: 1px solid #d6d3d1; color: #44403c !important; background: transparent; }
.ns-plan__btn.is-ghost:hover { border-color: var(--ns-jade); color: var(--ns-jade) !important; background: #fafaf9; }
.ns-plan__btn.is-amber { color: var(--ns-jade-dark) !important; background: #fffbeb; border: 1px solid #fcd34d; box-shadow: 0 1px 2px rgba(0, 0, 0, .05); }
.ns-plan__btn.is-amber:hover { background: rgba(254, 243, 199, .8); }
.ns-plan__btn.is-jade { padding: 14px 16px; color: #fff !important; background: var(--ns-jade); box-shadow: 0 4px 6px -1px rgba(0, 0, 0, .1); }
.ns-plan__btn.is-jade:hover { background: var(--ns-jade-dark); box-shadow: 0 10px 15px -3px rgba(0, 0, 0, .1); }
.ns-plan__btn.is-disabled { opacity: .55; pointer-events: none; }
.ns-plan__own, .ns-plan__note { font-size: 11px; text-align: center; margin: 10px 0 0; line-height: 1.5; }
.ns-plan__own { color: #047857; }
.ns-plan__own a { color: inherit !important; text-decoration: underline !important; }
.ns-plan__note { color: #78716c; }
.ns-plan__admin { font-size: 11px; color: var(--ns-cinnabar); text-align: center; margin: 10px 0 0; }
.ns-plans-empty { text-align: center; padding: 32px; background: #fff; border: 1px dashed var(--ns-border-dark); border-radius: 16px; color: var(--ns-ink-light); font-size: 14px; }

.ns-guarantees { margin-top: 80px; padding-top: 40px; border-top: 1px solid var(--ns-border); display: grid; grid-template-columns: 1fr; gap: 24px; text-align: center; font-size: 12px; color: var(--ns-ink-light); }
@media (min-width: 768px) { .ns-guarantees { grid-template-columns: repeat(3, 1fr); } }
.ns-guarantee { display: flex; flex-direction: column; align-items: center; padding: 24px; border-radius: 16px; background: #fff; border: 1px solid var(--ns-border); box-shadow: 0 1px 2px rgba(0, 0, 0, .05); }
.ns-guarantee__icon { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; background: #ecfdf5; color: var(--ns-jade); border: 1px solid #d1fae5; }
.ns-guarantee__icon.is-gold { background: #fffbeb; color: var(--ns-gold-dark); border-color: #fef3c7; }
.ns-guarantee__icon svg { width: 20px; height: 20px; }
.ns-guarantee b { font-family: var(--ns-serif); font-weight: 700; font-size: 14px; color: var(--ns-jade-dark); margin-bottom: 4px; }
.ns-guarantee span { line-height: 1.65; }

.ns-compare { margin-top: 64px; }
.ns-compare h2 { font-family: var(--ns-serif); font-weight: 600; font-size: 26px; color: var(--ns-jade-dark); text-align: center; margin: 0 0 20px; }
.ns-compare__scroll { overflow-x: auto; background: #fff; border: 1px solid var(--ns-border); border-radius: 16px; box-shadow: var(--ns-shadow-card); }
.ns-compare table { width: 100%; min-width: 720px; border-collapse: collapse; font-size: 13px; margin: 0; }
.ns-compare th, .ns-compare td { padding: 12px 16px; text-align: left; vertical-align: top; border: 0; border-bottom: 1px solid var(--ns-border-light); line-height: 1.5; }
.ns-compare thead th { background: var(--ns-paper); font-family: var(--ns-serif); font-weight: 600; color: var(--ns-jade-dark); font-size: 14px; }
.ns-compare tbody th { font-weight: 500; color: var(--ns-ink); width: 34%; }
.ns-compare td { color: var(--ns-ink-light); }
.ns-compare tbody tr:last-child > * { border-bottom: 0; }
.ns-compare .is-yes { color: #047857; font-weight: 700; }
.ns-compare .is-no { color: #d6d3d1; }
.ns-compare__note { text-align: center; font-size: 12px; color: #78716c; margin: 12px 0 0; }
.ns-pricing__disclaimer { max-width: 760px; margin: 40px auto 0; text-align: center; font-size: 12px; line-height: 1.7; color: #78716c; }