/* Lạc Long Quân: Trừ Yêu — trang giới thiệu.
   Bảng màu lấy đúng tools/sinh_hinh/kg_mau.py (Khắc gỗ & Mực): giấy, mực, ba màu nhấn chàm / son / nghệ, nhũ vàng.
   Không có script theo dõi; phông Be Vietnam Pro qua Google Fonts. */

:root {
  --giay: #EEE3C8;      /* giấy dó quét điệp */
  --giay-toi: #D9C9A3;  /* giấy ố */
  --trang: #FAF4E4;     /* trắng điệp */
  --muc: #1C1814;       /* mực than */
  --muc-2: #2A241E;     /* mực in mỏng (bảng tối) */
  --muc-3: #3A322A;
  --cham: #24506A;      /* xanh chàm: nước, Long Quân */
  --cham-nhat: #7FA3AD;
  --son: #BE3A26;       /* đỏ son: yêu, nguy hiểm */
  --son-dam: #9E2E1D;
  --nghe: #E7A321;      /* vàng nghệ: đồng, ánh sáng */
  --nghe-nhat: #F0D9A0;
  --nhu: #C8A251;       /* nhũ vàng */
  --tho: #A9782F;       /* đồng xỉn */
  --go: #6B4A2E;
  --reu: #4A7038;
  --chu-phu: #5B5045;   /* chữ phụ trên giấy (≥ 7:1 trên --giay) */

  --font: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --wrap: 1120px;
  --r: 6px;
  --in: 4px 4px 0 var(--muc);  /* bóng in lệch bản khắc */
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--muc);
  background-color: var(--giay);
  /* thớ giấy dó: nhiễu rất nhẹ */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .11 0 0 0 0 .09 0 0 0 0 .07 0 0 0 .07 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  overflow-x: hidden;
}

/* ---------- song ngữ: html[data-lang] ẩn bản còn lại ---------- */
html[data-lang="vi"] .en, html[data-lang="en"] .vi { display: none !important; }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--cham); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--son); }
:focus-visible { outline: 3px solid var(--nghe); outline-offset: 3px; border-radius: 2px; }
strong { font-weight: 700; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--nghe); color: var(--muc); padding: 8px 14px; font-weight: 700; }
.skip:focus { left: 12px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- thanh điều hướng ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--muc);
  color: var(--giay);
  border-bottom: 3px solid var(--nghe);
}
.nav .wrap { display: flex; align-items: center; gap: 16px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--giay); text-decoration: none; font-weight: 800; letter-spacing: .01em; white-space: nowrap; }
.brand img { width: 36px; height: 36px; border-radius: 8px; border: 2px solid var(--nghe); }
.brand:hover { color: var(--nghe); }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a { color: var(--giay); text-decoration: none; font-size: 15px; font-weight: 500; padding: 8px 10px; border-radius: 4px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--nghe); }
.nav-links .opt { display: inline; }
@media (max-width: 860px) { .nav-links .opt { display: none; } }
@media (max-width: 420px) { .nav .brand span { display: none; } }

.lang { display: inline-flex; border: 2px solid var(--nghe); border-radius: 4px; overflow: hidden; margin-left: 6px; flex: none; }
.lang button {
  font: 700 13px/1 var(--font); letter-spacing: .06em;
  background: transparent; color: var(--giay); border: 0; padding: 8px 10px; min-width: 40px; min-height: 36px; cursor: pointer;
}
.lang button[aria-pressed="true"] { background: var(--nghe); color: var(--muc); }

/* ---------- dải hoa văn Đông Sơn (vòng tròn đồng tâm nối tiếp tuyến) ---------- */
.frieze {
  height: 46px;
  background-color: var(--giay-toi);
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='92' height='46' viewBox='0 0 92 46'%3E%3Cg fill='none' stroke='%231C1814' stroke-width='2.2'%3E%3Cpath d='M0 4h92M0 42h92'/%3E%3Cpath d='M0 10l4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4M0 36l4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4' stroke-width='1.6'/%3E%3Ccircle cx='46' cy='23' r='9'/%3E%3Ccircle cx='46' cy='23' r='5'/%3E%3Ccircle cx='46' cy='23' r='1.6' fill='%231C1814'/%3E%3Cpath d='M37 27C24 31 14 15 0 19M55 19c13-4 23 12 37 8'/%3E%3C/g%3E%3C/svg%3E");
  background-repeat: repeat-x;
  background-position: center;
  border-top: 3px solid var(--muc);
  border-bottom: 3px solid var(--muc);
}
.frieze.dark { background-color: var(--muc-2); filter: invert(0); }
.frieze.dark { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='92' height='46' viewBox='0 0 92 46'%3E%3Cg fill='none' stroke='%23C8A251' stroke-width='2.2'%3E%3Cpath d='M0 4h92M0 42h92'/%3E%3Cpath d='M0 10l4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4M0 36l4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4 4-4 4 4' stroke-width='1.6'/%3E%3Ccircle cx='46' cy='23' r='9'/%3E%3Ccircle cx='46' cy='23' r='5'/%3E%3Ccircle cx='46' cy='23' r='1.6' fill='%23C8A251'/%3E%3Cpath d='M37 27C24 31 14 15 0 19M55 19c13-4 23 12 37 8'/%3E%3C/g%3E%3C/svg%3E"); border-color: var(--nhu); }

/* ---------- hero ---------- */
.hero {
  position: relative;
  color: var(--giay);
  background: var(--cham);
  background-image:
    radial-gradient(ellipse at 75% 40%, rgba(231,163,33,.18), transparent 55%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='40' viewBox='0 0 120 40'%3E%3Cg fill='none' stroke='%23FAF4E4' stroke-opacity='.10' stroke-width='2'%3E%3Cpath d='M0 20c10-10 20-10 30 0s20 10 30 0 20-10 30 0 20 10 30 0'/%3E%3Cpath d='M-15 36c10-10 20-10 30 0s20 10 30 0 20-10 30 0 20 10 30 0 20-10 30 0'/%3E%3C/g%3E%3C/svg%3E");
  overflow: hidden;
}
.hero .wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center; padding-top: 56px; padding-bottom: 64px; }
.hero-drum { position: absolute; right: -180px; top: -120px; width: 760px; height: 760px; opacity: .16; pointer-events: none; }
.kicker { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--nghe); margin: 0 0 14px; }
.kicker::before { content: ""; width: 28px; height: 3px; background: currentColor; }
.hero h1 { margin: 0; font-size: clamp(40px, 7vw, 76px); line-height: 1.02; font-weight: 900; letter-spacing: -.01em; text-transform: uppercase; color: var(--trang); text-shadow: 4px 4px 0 var(--muc); }
.hero h1 .sub { display: block; font-size: .5em; letter-spacing: .02em; color: var(--nghe); margin-top: 10px; text-shadow: 3px 3px 0 var(--muc); }
.hero .kicker { color: var(--nghe-nhat); }
.hero .lead { font-size: clamp(18px, 2.2vw, 21px); max-width: 34em; margin: 22px 0 0; color: var(--giay); }
.hero .lead strong { color: var(--trang); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; font: 700 16px/1 var(--font); text-decoration: none;
  padding: 15px 22px; border: 3px solid var(--muc); border-radius: var(--r); background: var(--nghe); color: var(--muc); box-shadow: var(--in);
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { color: var(--muc); transform: translate(-2px,-2px); box-shadow: 6px 6px 0 var(--muc); }
.btn.ghost { background: var(--giay); }
.soon { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 600; color: var(--giay); border: 2px dashed rgba(240,217,160,.6); border-radius: var(--r); padding: 10px 14px; }
.soon svg { flex: none; }

.facts { list-style: none; padding: 0; margin: 34px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.facts li { background: rgba(28,24,20,.55); border: 1px solid rgba(240,217,160,.35); border-radius: 999px; padding: 6px 14px; font-size: 14px; font-weight: 600; color: var(--nghe-nhat); }

/* khung điện thoại */
.phone {
  position: relative; margin: 0; width: 100%; max-width: 300px; aspect-ratio: 9 / 16;
  border: 10px solid var(--muc); border-radius: 30px; background: var(--muc); overflow: hidden;
  box-shadow: 10px 10px 0 rgba(28,24,20,.55);
}
.phone img { width: 100%; height: 100%; object-fit: cover; }
.hero .phone { justify-self: center; transform: rotate(2.5deg); max-width: 320px; }
.hero .phone-2 { position: absolute; width: 46%; max-width: 170px; left: -18%; bottom: -6%; transform: rotate(-6deg); border-width: 7px; border-radius: 20px; }
.hero-art { position: relative; justify-self: center; width: 100%; max-width: 330px; }

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: 1fr; padding-top: 36px; padding-bottom: 48px; }
  .hero-art { max-width: 270px; margin-top: 8px; }
  .hero .phone-2 { left: -10%; width: 42%; }
}

/* ---------- khối chung ---------- */
section { position: relative; }
.sec { padding: 80px 0; }
.sec-head { max-width: 760px; margin-bottom: 40px; }
.sec-head h2, .h2 { font-size: clamp(30px, 4.6vw, 46px); line-height: 1.12; font-weight: 900; margin: 0 0 14px; text-transform: uppercase; letter-spacing: -.005em; }
.sec-head p { margin: 0; font-size: 18px; color: var(--chu-phu); }
.ink { background: var(--muc-2); color: var(--giay); }
.ink .sec-head p { color: var(--giay-toi); }
.ink a { color: var(--nghe); }
.ink a:hover { color: var(--trang); }

/* ---------- nhãn Thư Tịch ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
  padding: 4px 10px 4px 8px; border-radius: 3px; color: var(--trang); background: var(--cham); border: 2px solid var(--muc); line-height: 1.3;
}
.tag::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; opacity: .85; }
.tag.kc { background: #8A5F1E; color: var(--trang); }  /* đồng xỉn in đậm: 5,1:1 với chữ trắng điệp */
.tag.st { background: var(--son); }

/* ---------- truyền thuyết ---------- */
.legend-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.legend-intro .drop::first-letter { float: left; font-size: 64px; line-height: .9; font-weight: 900; padding: 6px 10px 0 0; color: var(--son); }
.legend-intro p { margin: 0 0 16px; }
.parents { background: var(--trang); border: 3px solid var(--muc); border-radius: var(--r); box-shadow: var(--in); padding: 22px 24px; }
.parents h3 { margin: 0 0 8px; font-size: 18px; font-weight: 800; text-transform: uppercase; letter-spacing: .04em; }
.parents p { margin: 0 0 10px; font-size: 16px; }
.parents .src { font-size: 13px; color: var(--chu-phu); margin: 12px 0 0; }
@media (max-width: 860px) { .legend-intro { grid-template-columns: 1fr; } }

.chapter { padding: 72px 0 80px; border-top: 3px solid var(--muc); }
.chapter.c1 { --c-giay: #EEE3C8; --c-nen: #24506A; --c-nhan: #E7A321; }
.chapter.c2 { --c-giay: #D7CDB8; --c-nen: #2B2540; --c-nhan: #BE3A26; }
.chapter.c3 { --c-giay: #E4E0C2; --c-nen: #2F4A2A; --c-nhan: #E7A321; }
.chapter.ep  { --c-giay: #EEE3C8; --c-nen: #1C1814; --c-nhan: #C8A251; }
.chapter { background-color: var(--c-giay); }
.ch-head { display: grid; grid-template-columns: auto 1fr; gap: 24px; align-items: center; margin-bottom: 36px; }
.ch-num {
  width: 104px; height: 104px; display: grid; place-items: center; border-radius: 50%;
  background: var(--c-nen); color: var(--c-nhan); font-weight: 900; font-size: 40px; letter-spacing: .02em;
  border: 4px solid var(--muc); box-shadow: 0 0 0 5px var(--c-giay), 0 0 0 8px var(--muc);
}
.ch-head .where { margin: 0 0 4px; font-size: 14px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--c-nen); }
.ch-head h3 { margin: 0; font-size: clamp(28px, 4vw, 40px); font-weight: 900; line-height: 1.1; text-transform: uppercase; }
.ch-head .foe { color: var(--c-nen); }
.c2 .ch-head .foe { color: var(--son-dam); }

.panels { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.panel { margin: 0; background: var(--trang); border: 3px solid var(--muc); border-radius: var(--r); box-shadow: 6px 6px 0 var(--muc); overflow: hidden; display: flex; flex-direction: column; }
.panel img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-bottom: 3px solid var(--muc); background: var(--giay-toi); }
.panel figcaption { padding: 18px 20px 20px; }
.panel .ttl { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 8px; }
.panel .ttl b { font-size: 19px; font-weight: 800; }
.panel p { margin: 0; font-size: 16px; }
@media (max-width: 760px) { .panels { grid-template-columns: 1fr; } .ch-head { grid-template-columns: 1fr; gap: 14px; } .ch-num { width: 78px; height: 78px; font-size: 30px; } }

.ingame { margin-top: 32px; display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: center; background: var(--c-nen); color: var(--giay); border: 3px solid var(--muc); border-radius: var(--r); padding: 26px 28px; box-shadow: 6px 6px 0 var(--muc); }
.ingame h4 { margin: 0 0 8px; font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--c-nhan); }
.c2 .ingame h4 { color: #F0A08A; }
.ingame p { margin: 0 0 10px; font-size: 17px; }
.ingame .note { font-size: 14.5px; color: var(--giay-toi); border-left: 3px solid var(--c-nhan); padding-left: 12px; margin-top: 14px; }
.c2 .ingame .note { border-color: #F0A08A; }
.ingame .phone { width: 190px; border-width: 7px; border-radius: 20px; box-shadow: 6px 6px 0 rgba(0,0,0,.45); }
@media (max-width: 760px) { .ingame { grid-template-columns: 1fr; } .ingame .phone { justify-self: center; } }

.epilogue { text-align: center; max-width: 720px; margin: 40px auto 0; }
.epilogue blockquote { margin: 0; font-size: clamp(20px, 2.6vw, 25px); line-height: 1.5; font-weight: 600; }
.epilogue .tag { margin-bottom: 14px; }
.epilogue .disclaim { margin-top: 18px; font-size: 14px; color: var(--chu-phu); }

/* ---------- lối chơi ---------- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feat { background: var(--giay); color: var(--muc); border: 3px solid var(--muc); border-radius: var(--r); padding: 22px 22px 20px; box-shadow: 5px 5px 0 var(--nghe); }
.feat .ico { width: 52px; height: 52px; border-radius: 50%; background: var(--muc); display: grid; place-items: center; margin-bottom: 14px; }
.feat h3 { margin: 0 0 6px; font-size: 19px; font-weight: 800; line-height: 1.3; }
.feat p { margin: 0; font-size: 15.5px; color: var(--muc-3); }
@media (max-width: 960px) { .features { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .features { grid-template-columns: 1fr; } }

/* ---------- ảnh màn hình ---------- */
.gallery { display: grid; grid-auto-flow: column; grid-auto-columns: 230px; gap: 22px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 6px 4px 24px; margin: 0 -4px; overscroll-behavior-x: contain; scrollbar-color: var(--nghe) transparent; }
.gallery figure { margin: 0; scroll-snap-align: start; }
.gallery .phone { max-width: none; border-width: 7px; border-radius: 22px; box-shadow: 6px 6px 0 rgba(0,0,0,.5); }
.gallery figcaption { margin-top: 12px; font-size: 14px; font-weight: 600; color: var(--giay-toi); text-align: center; }
.gallery-hint { font-size: 13px; color: var(--giay-toi); margin: 4px 0 0; }

/* ---------- Thư Tịch ---------- */
.codex { display: grid; grid-template-columns: 1fr 280px; gap: 44px; align-items: start; }
.codex-cards { display: grid; gap: 22px; }
.page { background: var(--trang); border: 3px solid var(--muc); border-radius: var(--r); padding: 20px 22px; box-shadow: var(--in); }
.page header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 14px; margin-bottom: 10px; }
.page h3 { margin: 0; font-size: 20px; font-weight: 800; }
.page p { margin: 0; font-size: 15.5px; }
.page .count { font-size: 13px; color: var(--chu-phu); margin-top: 10px; }
.codex .phone { max-width: 280px; }
.label-key { display: flex; flex-wrap: wrap; gap: 10px 18px; margin: 18px 0 0; padding: 0; list-style: none; font-size: 15px; }
.label-key li { display: flex; align-items: center; gap: 8px; }
@media (max-width: 860px) { .codex { grid-template-columns: 1fr; } .codex .phone { justify-self: center; } }

/* ---------- Khắc gỗ ---------- */
.art { display: grid; grid-template-columns: 1fr 1.1fr; gap: 44px; align-items: center; }
.swatches { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; list-style: none; padding: 0; margin: 22px 0 0; }
.swatches li { border: 3px solid var(--muc); border-radius: var(--r); overflow: hidden; background: var(--trang); font-size: 13px; }
.swatches i { display: block; height: 54px; border-bottom: 3px solid var(--muc); }
.swatches span { display: block; padding: 6px 8px; font-weight: 700; line-height: 1.3; }
.swatches small { display: block; font-weight: 500; color: var(--chu-phu); font-family: ui-monospace, Menlo, monospace; font-size: 11.5px; }
.strip { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.strip img { border: 3px solid var(--muc); border-radius: 4px; aspect-ratio: 4/3; object-fit: cover; }
@media (max-width: 860px) { .art { grid-template-columns: 1fr; } }

/* ---------- cam kết ---------- */
.promise { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 3px solid var(--nghe); border-radius: var(--r); overflow: hidden; }
.promise div { padding: 26px 24px; border-right: 3px solid var(--nghe); }
.promise div:last-child { border-right: 0; }
.promise b { display: block; font-size: 22px; font-weight: 900; text-transform: uppercase; color: var(--nghe); margin-bottom: 6px; line-height: 1.2; }
.promise p { margin: 0; color: var(--giay); font-size: 15.5px; }
.v1 { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: center; justify-content: space-between; background: var(--giay); color: var(--muc); border: 3px solid var(--muc); border-radius: var(--r); padding: 20px 24px; box-shadow: 5px 5px 0 var(--nghe); }
.v1 p { margin: 0; max-width: 46em; }
.v1 a { color: var(--cham); font-weight: 700; }
@media (max-width: 760px) { .promise { grid-template-columns: 1fr; } .promise div { border-right: 0; border-bottom: 3px solid var(--nghe); } .promise div:last-child { border-bottom: 0; } }

/* ---------- kêu gọi ---------- */
.cta { text-align: center; }
.cta img { width: 120px; height: 120px; border-radius: 26px; border: 4px solid var(--muc); box-shadow: var(--in); margin: 0 auto 22px; }
.cta p { max-width: 36em; margin: 0 auto 24px; color: var(--chu-phu); font-size: 18px; }
.cta .hero-cta { justify-content: center; }
.cta .soon { color: var(--muc); border-color: var(--muc); }

/* ---------- chân trang ---------- */
.foot { background: var(--muc); color: var(--giay-toi); padding: 40px 0 46px; font-size: 14.5px; }
.foot .wrap { display: grid; grid-template-columns: 1fr auto; gap: 18px 32px; align-items: start; }
.foot .brand { color: var(--giay); }
.foot nav { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.foot nav a { color: var(--giay); text-decoration: none; font-weight: 600; }
.foot nav a:hover { color: var(--nghe); }
.foot .fine { grid-column: 1 / -1; margin: 0; color: #B5A887; font-size: 13.5px; line-height: 1.6; }
.foot .fine a { color: var(--nghe-nhat); }
@media (max-width: 700px) { .foot .wrap { grid-template-columns: 1fr; } }

/* ---------- trang văn bản (privacy, support) ---------- */
.doc-hero { background: var(--cham); color: var(--giay); padding: 52px 0 46px; border-bottom: 3px solid var(--muc); }
.doc-hero h1 { margin: 0 0 8px; font-size: clamp(32px, 5vw, 50px); font-weight: 900; text-transform: uppercase; line-height: 1.08; color: var(--trang); text-shadow: 3px 3px 0 var(--muc); }
.doc-hero p { margin: 0; color: var(--nghe-nhat); font-weight: 600; }
.doc { max-width: 780px; padding-top: 44px; padding-bottom: 72px; }
.doc h2 { font-size: 23px; font-weight: 800; margin: 40px 0 10px; line-height: 1.3; }
.doc h2 .n { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--muc); color: var(--nghe); font-size: 15px; margin-right: 10px; vertical-align: 2px; }
.doc p, .doc li { font-size: 16.5px; }
.doc ul { padding-left: 1.3em; }
.doc li { margin-bottom: 6px; }
.summary { background: var(--trang); border: 3px solid var(--muc); border-radius: var(--r); box-shadow: 5px 5px 0 var(--nghe); padding: 20px 24px; }
.summary ul { list-style: none; padding: 0; margin: 12px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px 18px; }
.summary li { display: flex; gap: 8px; align-items: flex-start; margin: 0; font-weight: 600; font-size: 15.5px; }
.summary li::before { content: "✕"; color: var(--son); font-weight: 900; flex: none; }
.summary li.ok::before { content: "✓"; color: var(--reu); }
@media (max-width: 600px) { .summary ul { grid-template-columns: 1fr; } }
.contact-box { margin-top: 30px; background: var(--muc-2); color: var(--giay); border-radius: var(--r); border: 3px solid var(--muc); padding: 22px 24px; }
.contact-box a { color: var(--nghe); font-weight: 700; font-size: 18px; }
.meta-line { font-size: 14px; color: var(--chu-phu); }

details.faq { background: var(--trang); border: 3px solid var(--muc); border-radius: var(--r); margin: 0 0 14px; box-shadow: 4px 4px 0 var(--muc); }
details.faq summary { cursor: pointer; list-style: none; padding: 16px 52px 16px 20px; font-weight: 800; font-size: 17px; position: relative; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); width: 26px; height: 26px; border-radius: 50%; background: var(--muc); color: var(--nghe); display: grid; place-items: center; font-size: 20px; line-height: 1; }
details.faq[open] summary::after { content: "−"; }
details.faq[open] summary { border-bottom: 2px dashed var(--giay-toi); }
details.faq .a { padding: 14px 20px 16px; }
details.faq .a p { margin: 0 0 10px; }
details.faq .a p:last-child { margin-bottom: 0; }
.mail-card { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: center; background: var(--trang); border: 3px solid var(--muc); border-radius: var(--r); padding: 22px 24px; box-shadow: 5px 5px 0 var(--nghe); margin-bottom: 36px; }
.mail-card .ico { width: 56px; height: 56px; border-radius: 50%; background: var(--muc); display: grid; place-items: center; }
.mail-card p { margin: 0; }
.mail-card a.big { font-size: 20px; font-weight: 800; word-break: break-all; }
@media (max-width: 520px) { .mail-card { grid-template-columns: 1fr; } }

/* điện thoại hẹp (≤ 400 px): thu khoảng cách menu để "Quyền riêng tư" + VI/EN vừa một hàng */
@media (max-width: 400px) {
  .nav .wrap { gap: 8px; padding: 0 12px; }
  .nav-links a { padding: 8px 6px; font-size: 14px; }
  .lang button { min-width: 34px; padding: 8px 7px; }
}

/* ---------- nút "Tôi muốn chơi" (đếm quan tâm, không dữ liệu cá nhân) ---------- */
.quan-tam { margin-top: 22px; max-width: 520px; }
.quan-tam p { margin: 10px 0 0; font-size: 15px; color: var(--giay); }
.quan-tam .qt-ghi-chu { font-size: 13px; opacity: .8; }
.quan-tam .qt-chon { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 12px; }
.quan-tam .qt-chon .btn { padding: 11px 18px; font-size: 15px; }
.quan-tam .qt-nut svg { color: var(--son); }
.quan-tam.qt-sang { margin-left: auto; margin-right: auto; }
.quan-tam.qt-sang p { color: var(--muc); }
.cta .quan-tam .qt-chon { justify-content: center; }
.sr-live { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }