:root{
  --ink:#12203a;--muted:#56657f;--bg:#f6f9ff;--card:#fff;--line:#e2e9f6;
  --blue:#2f6bff;--blue2:#5b8cff;--sky:#e7efff;--sun:#ffc53d;--coral:#ff6b5e;--mint:#2fd6a3;--violet:#7b61ff;
  --r:22px;--sh:0 12px 32px rgba(47,107,255,.13);--max:1120px;color-scheme:light
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;-webkit-text-size-adjust:100%}
svg{display:block;max-width:100%}
a{color:inherit}
h1,h2,h3,p{margin:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.grad{color:var(--blue);background:linear-gradient(90deg,var(--blue),var(--violet) 55%,var(--coral));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* nút */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:999px;font-weight:700;text-decoration:none;border:2px solid transparent;transition:transform .15s,box-shadow .15s;cursor:pointer}
.btn:hover{transform:translateY(-2px)}
.btn-main{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(47,107,255,.35)}
.btn-zalo{background:#0068ff;color:#fff;box-shadow:0 8px 20px rgba(0,104,255,.3)}
.btn-line{background:#fff;color:var(--blue);border-color:var(--blue)}
.btn-sm{padding:9px 16px;font-size:15px}
.btn svg{width:20px;height:20px}

/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(246,249,255,.88);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:20px;height:64px}
.logo{display:flex;align-items:center;gap:9px;font-weight:800;font-size:21px;text-decoration:none;letter-spacing:-.02em}
.logo svg{width:34px;height:34px}
.logo b{color:var(--blue)}
.nav{display:flex;gap:22px;margin-left:auto;font-weight:600;font-size:15px}
.nav a{text-decoration:none;color:var(--muted)}
.nav a:hover{color:var(--blue)}
.top .btn{margin-left:8px}

/* hero */
.hero{position:relative;overflow:hidden;padding:56px 0 72px}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(2px);z-index:0}
.hero:before{width:520px;height:520px;right:-140px;top:-160px;background:radial-gradient(circle at 30% 30%,#c9dbff,#e9f0ff 60%,transparent 70%)}
.hero:after{width:380px;height:380px;left:-160px;bottom:-200px;background:radial-gradient(circle at 60% 40%,#ffe6a8,#fff3d1 55%,transparent 70%)}
.hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.pill{display:inline-block;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:14px;font-weight:600;color:var(--muted);box-shadow:0 4px 14px rgba(47,107,255,.08)}
.pill i{display:inline-block;width:8px;height:8px;background:var(--mint);border-radius:50%;margin-right:8px}
.hero h1{font-size:clamp(38px,6vw,64px);line-height:1.05;letter-spacing:-.035em;font-weight:900;margin:18px 0}
.hero p.lead{font-size:18px;color:var(--muted);max-width:34em}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 22px}
.ticks{display:flex;flex-wrap:wrap;gap:8px 18px;list-style:none;padding:0;margin:0;font-size:14px;font-weight:600;color:var(--muted)}
.ticks li:before{content:"";display:inline-block;width:16px;height:16px;margin:0 6px -3px 0;border-radius:50%;background:var(--mint) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 8.3l2.3 2.3 4.7-4.9' fill='none' stroke='%23fff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat}

/* hình minh họa hero */
.art{position:relative;min-height:400px}
.win{position:absolute;inset:20px 34px 60px 26px;background:#fff;border-radius:24px;box-shadow:var(--sh),0 2px 0 var(--line);overflow:hidden;transform:rotate(-2deg)}
.win .bar{display:flex;gap:6px;padding:12px 16px;background:#f0f4fd}
.win .bar i{width:11px;height:11px;border-radius:50%;background:#ff6b5e}
.win .bar i:nth-child(2){background:var(--sun)}
.win .bar i:nth-child(3){background:var(--mint)}
.win .url{margin-left:10px;flex:1;background:#fff;border-radius:999px;font-size:12px;color:var(--muted);padding:1px 12px}
.win .body{padding:18px}
.win .shop{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.win .shop span{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,var(--blue),var(--violet))}
.win .shop b{display:block;font-size:16px}
.win .shop small{color:var(--muted)}
.win .row{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px}
.win .row b{color:var(--blue)}
.win .btns{display:flex;gap:8px;margin-top:14px}
.win .btns span{flex:1;text-align:center;padding:9px;border-radius:12px;font-weight:700;font-size:14px;color:#fff;background:var(--blue)}
.win .btns span+span{background:#0068ff}
.st{position:absolute;background:#fff;border-radius:16px;padding:10px 14px;font-weight:700;font-size:14px;box-shadow:var(--sh);display:flex;align-items:center;gap:8px;animation:fl 5s ease-in-out infinite}
.st svg{width:22px;height:22px;fill:none;stroke:var(--blue);stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.st.a{right:0;top:38px;animation-delay:-1s}
.st.b{left:0;bottom:6px;animation-delay:-2.5s}
.st.c{right:8px;bottom:0;background:var(--sun);animation-delay:-3.5s}
@keyframes fl{0%,100%{transform:translateY(0) rotate(var(--rot,0deg))}50%{transform:translateY(-10px) rotate(var(--rot,0deg))}}
.st.a{--rot:3deg}.st.b{--rot:-3deg}.st.c{--rot:2deg}

/* khối chung */
section{padding:72px 0}
.sec-h{max-width:660px;margin-bottom:36px}
.sec-h .kicker{font-weight:800;font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue)}
.sec-h h2{font-size:clamp(28px,4vw,40px);line-height:1.15;letter-spacing:-.03em;font-weight:900;margin:8px 0 10px}
.sec-h p{color:var(--muted);font-size:17px}
.grid{display:grid;gap:18px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:0 4px 14px rgba(20,40,90,.04)}

/* vì sao */
.why .card h3{font-size:19px;margin:14px 0 6px}
.why .card p{color:var(--muted);font-size:15px}
.ic{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;color:#fff}
.ic svg{width:28px;height:28px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.why .card:nth-child(1) .ic{background:linear-gradient(135deg,#5b8cff,#7b61ff)}
.why .card:nth-child(2) .ic{background:linear-gradient(135deg,#ffc53d,#ff9d3d)}
.why .card:nth-child(3) .ic{background:linear-gradient(135deg,#2fd6a3,#19b6c9)}
.why .card:nth-child(4) .ic{background:linear-gradient(135deg,#ff6b5e,#ff4f8b)}

/* mẫu */
.mau{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.ng{display:block;text-decoration:none;border-radius:var(--r);overflow:hidden;background:#fff;border:1px solid var(--line);transition:transform .18s,box-shadow .18s}
.ng:hover{transform:translateY(-5px);box-shadow:var(--sh)}
.ng .cv{height:132px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--c1),var(--c2));position:relative}
.ng .cv svg{width:62px;height:62px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.ng .cv:after{content:"";position:absolute;right:-30px;top:-30px;width:110px;height:110px;border-radius:50%;background:rgba(255,255,255,.16)}
.ng .tx{padding:16px 18px 18px}
.ng h3{font-size:18px}
.ng p{font-size:14px;color:var(--muted);margin:2px 0 8px}
.ng .go{font-weight:700;font-size:14px;color:var(--c1)}
.ng.more{border:2px dashed #b9c9ee;background:transparent;display:grid;place-items:center;text-align:center;padding:24px;min-height:230px}
.ng.more b{font-size:18px;display:block;margin-bottom:6px}
.ng.more span{color:var(--muted);font-size:14px;display:block;margin-bottom:14px}
.ng.more span.btn{display:inline-flex;color:#fff;margin:0;font-size:15px}

/* quy trình */
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.steps li{counter-increment:s;position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px 22px 22px}
.steps li:before{content:counter(s);position:absolute;top:-16px;left:20px;width:38px;height:38px;border-radius:50%;background:var(--blue);color:#fff;font-weight:900;display:grid;place-items:center;box-shadow:0 6px 14px rgba(47,107,255,.35)}
.steps li:nth-child(2):before{background:var(--violet)}
.steps li:nth-child(3):before{background:var(--coral)}
.steps li:nth-child(4):before{background:var(--mint)}
.steps h3{font-size:17px;margin-bottom:4px}
.steps p{font-size:14.5px;color:var(--muted)}

/* giá */
.gia{background:linear-gradient(180deg,#eef3ff,#f6f9ff)}
.pk{position:relative;display:flex;flex-direction:column}
.pk.hot{border:2px solid var(--blue);box-shadow:var(--sh)}
.pk .tag{position:absolute;top:-13px;right:22px;background:var(--sun);color:#5a3d00;font-weight:800;font-size:12px;padding:4px 12px;border-radius:999px}
.pk h3{font-size:22px}
.pk .sub{color:var(--muted);font-size:14.5px}
.pk .price{font-size:30px;font-weight:900;letter-spacing:-.03em;margin:14px 0 2px;color:var(--blue)}
.pk .price small{font-size:15px;font-weight:600;color:var(--muted);letter-spacing:0}
.pk .note{font-size:13.5px;color:var(--muted);margin-bottom:14px}
.pk ul{list-style:none;padding:0;margin:0 0 18px;display:grid;gap:8px;font-size:15px}
.pk li{padding-left:26px;position:relative}
.pk li:before{content:"";position:absolute;left:0;top:5px;width:16px;height:16px;border-radius:50%;background:var(--mint) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 8.3l2.3 2.3 4.7-4.9' fill='none' stroke='%23fff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat}
.pk .btn{margin-top:auto}
.sub-h{font-size:22px;font-weight:800;letter-spacing:-.02em;margin:44px 0 6px}
.sub-p{color:var(--muted);margin-bottom:18px;max-width:640px}
.dm{display:flex;flex-direction:column;gap:4px}
.dm b{font-size:24px;letter-spacing:-.02em}
.dm em{font-style:normal;font-size:12px;font-weight:800;color:#0c7a5b;background:#d7f7ea;border-radius:999px;padding:2px 10px;width:max-content}
.dm p{font-size:14.5px;color:var(--muted)}
.mini{display:grid;gap:4px}
.mini b{font-size:16px}
.mini .p{font-size:20px;font-weight:800;color:var(--blue);letter-spacing:-.02em}
.mini small{color:var(--muted);font-size:13.5px}
.extras{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.extras li{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 18px;display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:15px}
.extras b{white-space:nowrap;color:var(--blue)}
.fine{margin-top:16px;font-size:13.5px;color:var(--muted)}

/* hỏi đáp */
.faq{display:grid;gap:12px;max-width:820px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 20px}
.faq summary{cursor:pointer;list-style:none;font-weight:700;padding:16px 28px 16px 0;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";position:absolute;right:0;top:12px;font-size:26px;color:var(--blue);line-height:1}
.faq details[open] summary:after{content:"−"}
.faq details p{padding:0 0 18px;color:var(--muted)}

/* kêu gọi */
.ends{padding:24px 0 84px}
.band{border-radius:32px;padding:48px 32px;text-align:center;color:#fff;background:linear-gradient(120deg,#2f6bff,#7b61ff 60%,#ff6b5e);position:relative;overflow:hidden}
.band:before{content:"";position:absolute;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,.12);left:-70px;top:-90px}
.band h2{font-size:clamp(28px,4vw,42px);letter-spacing:-.03em;line-height:1.15;font-weight:900;position:relative}
.band p{max-width:540px;margin:12px auto 24px;opacity:.94;position:relative}
.band .btn{background:#fff;color:var(--blue);position:relative;box-shadow:0 10px 24px rgba(0,0,0,.18)}

/* chân trang */
footer{background:#0f1b33;color:#c4cee3;padding:44px 0 90px;font-size:15px}
footer .wrap{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:28px}
footer b{color:#fff;display:block;margin-bottom:6px}
footer .logo{color:#fff;margin-bottom:10px}
footer .logo b{display:inline;margin:0}
footer a{text-decoration:none;color:#fff}
footer .copy{grid-column:1/-1;border-top:1px solid #23335a;padding-top:18px;font-size:13.5px;color:#8fa0c4}

/* thanh gọi nhanh trên điện thoại */
.fab{display:none}

@media (max-width:900px){
  .hero .wrap{grid-template-columns:1fr}
  .art{min-height:330px;max-width:460px;width:100%;margin:0 auto}
  .g4,.steps{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:1fr}
  .nav{display:none}
  .top .btn{margin-left:auto}
  footer .wrap{grid-template-columns:1fr}
}
@media (max-width:600px){
  section{padding:52px 0}
  .g4,.steps,.g2,.extras{grid-template-columns:1fr}
  .hero{padding:36px 0 52px}
  .ng .cv{height:110px}
  .fab{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;gap:10px;padding:10px 14px;background:rgba(255,255,255,.94);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-top:1px solid var(--line)}
  .fab a{flex:1}
  .grid.mauge{grid-template-columns:repeat(2,1fr)}
  .mauge .ng .tx{padding:12px 12px 14px}
  .mauge .ng h3{font-size:16px}
  .mauge .ng p{display:none}
  .mauge .ng.more{min-height:0}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}