/* Trang gioi thieu kholive.com (22/10/2026): SaaS gon, nen trang / xam rat nhat, xanh KhoLive chu dao, navy cho chu, do chi diem nhan. */
:root { --b: #1d6bf3; --b2: #e8f0fe; --navy: #0f1f3d; --tx: #334155; --mu: #64748b; --ln: #e5ebf3; --bg2: #f5f8fc; --red: #e5484d; --r: 16px; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; color: var(--tx); background: #fff; }
a { color: var(--b); text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { color: var(--navy); line-height: 1.22; margin: 0 0 12px; letter-spacing: -.01em; }
h1 { font-size: clamp(30px, 4.4vw, 50px); font-weight: 800; }
h1 em { font-style: normal; color: var(--b); }
h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; }
h3 { font-size: 20px; }
p { margin: 0 0 14px; }
.wrap { width: min(1180px, 100% - 32px); margin: 0 auto; }
.narrow { width: min(820px, 100% - 32px); }
.kicker { display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--b); background: var(--b2); border-radius: 999px; padding: 4px 12px; margin-bottom: 14px; }

/* nut */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1.5px solid var(--b); background: var(--b); color: #fff; font-weight: 700; font-size: 15px; border-radius: 12px; padding: 10px 18px; white-space: nowrap; transition: transform .15s, box-shadow .15s; }
.btn:hover { box-shadow: 0 8px 22px rgba(29, 107, 243, .28); transform: translateY(-1px); }
.btn.ghost { background: #fff; color: var(--b); }
.btn.white { background: #fff; color: var(--b); border-color: #fff; }
.btn.big { font-size: 16.5px; padding: 14px 24px; border-radius: 14px; }

/* dau trang */
.hd { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .94); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--ln); padding-top: env(safe-area-inset-top); }
.hd .row { display: flex; align-items: center; gap: 20px; height: 68px; }
.logo { display: inline-flex; align-items: center; gap: 9px; color: var(--navy); }
.logo img { border-radius: 9px; }
.logo b { font-size: 23px; font-weight: 800; letter-spacing: -.02em; }
.nav { display: flex; gap: 26px; margin-left: 24px; flex: 1; }
.nav a { color: var(--navy); font-weight: 600; font-size: 15px; }
.nav a:hover { color: var(--b); }
.nav .m { display: none; }
.hdbtn { display: flex; gap: 10px; }
.burger { display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--ln); background: #fff; border-radius: 12px; padding: 12px 11px; flex-direction: column; justify-content: space-between; cursor: pointer; }
.burger span { display: block; height: 2px; background: var(--navy); border-radius: 2px; }

/* 1. gioi thieu */
.hero { background: linear-gradient(180deg, #f3f7fe 0%, #fff 100%); padding: 56px 0 48px; overflow: hidden; }
.hrow { display: grid; grid-template-columns: .9fr 1.4fr; gap: 40px; align-items: center; }
.hshot { margin-right: calc((100vw - min(1180px, 100vw - 32px)) / -2 + 16px); }   /* anh tran ra mep phai, to ro hon */
.lead { font-size: 18px; color: var(--tx); max-width: 560px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 26px 0 20px; }
.ticks { list-style: none; margin: 0; padding: 0; display: flex; gap: 20px; flex-wrap: wrap; }
.ticks li { position: relative; padding-left: 28px; font-weight: 600; color: var(--navy); font-size: 14.5px; }
.ticks li::before { content: ''; position: absolute; left: 0; top: 2px; width: 20px; height: 20px; border-radius: 50%; background: var(--b) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-6.5' fill='none' stroke='%23fff' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/100% no-repeat; }
.ticks.col { flex-direction: column; gap: 10px; margin: 16px 0 20px; }
.ticks.col li { font-weight: 500; color: var(--tx); font-size: 15.5px; }
.ticks.big li { font-size: 16.5px; }
.hshot img.desk { border-radius: 14px; border: 1px solid var(--ln); box-shadow: 0 30px 60px -20px rgba(15, 31, 61, .35); }
.hshot img.mob { display: none; }

/* sections */
.sec { padding: 72px 0; }
.sec.alt { background: var(--bg2); }
.feats { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.f { text-align: center; padding: 8px 6px; }
.f b { display: block; color: var(--navy); font-size: 16px; margin: 12px 0 6px; }
.f span { display: block; font-size: 14px; color: var(--mu); line-height: 1.5; }
.ic { display: inline-grid; place-items: center; width: 58px; height: 58px; border-radius: 16px; }
.ic svg { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.ic.red { background: #fde8e9; color: var(--red); } .ic.blue { background: var(--b2); color: var(--b); } .ic.violet { background: #efe9fe; color: #7c3aed; }
.ic.navy { background: #e6ecf5; color: var(--navy); } .ic.green { background: #e3f7ec; color: #16a34a; } .ic.orange { background: #fff0e0; color: #ea7a0c; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.card { background: #fff; border: 1px solid var(--ln); border-radius: 22px; padding: 30px; box-shadow: 0 1px 2px rgba(15, 31, 61, .04); }
.card .shot { border-radius: 12px; border: 1px solid var(--ln); margin-top: 6px; }
.shots2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 6px; }
.shots2 img, .need .shot { border-radius: 16px; border: 1px solid var(--ln); box-shadow: 0 14px 30px -18px rgba(15, 31, 61, .4); }
.need .shot { max-width: 210px; margin: 10px auto 0; }
.steps { list-style: none; counter-reset: s; padding: 0; margin: 24px 0 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.steps li { counter-increment: s; position: relative; background: #fff; border: 1px solid var(--ln); border-radius: 18px; padding: 50px 18px 20px; }
.steps li::before { content: counter(s); position: absolute; top: 16px; left: 18px; width: 26px; height: 26px; border-radius: 50%; background: var(--b); color: #fff; font-weight: 800; font-size: 14px; display: grid; place-items: center; }
.steps b { display: block; color: var(--navy); margin-bottom: 4px; }
.steps span { font-size: 14px; color: var(--mu); }
.dl { display: flex; align-items: center; justify-content: space-between; gap: 28px; background: var(--navy); color: #cdd8ea; border-radius: 24px; padding: 34px 38px; }
.dl h2 { color: #fff; } .dl p { margin: 0; } .dl .kicker { background: rgba(255, 255, 255, .12); color: #fff; }
.stores { display: flex; gap: 12px; flex-wrap: wrap; }
.store { display: inline-flex; align-items: center; gap: 10px; background: #000; color: #fff; border-radius: 12px; padding: 9px 18px 9px 14px; border: 1px solid rgba(255, 255, 255, .25); min-width: 186px; }
.store svg { width: 26px; height: 26px; }
.store span { display: flex; flex-direction: column; font-weight: 700; font-size: 17px; line-height: 1.1; }
.store small { font-weight: 500; font-size: 11px; opacity: .8; }
.store.soon { opacity: .55; cursor: default; }
.hrow2 { display: flex; align-items: end; justify-content: space-between; gap: 16px; }
.more { font-weight: 700; white-space: nowrap; margin-bottom: 14px; }
.guides { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 10px; }
.g { display: flex; flex-direction: column; gap: 6px; background: #fff; border: 1px solid var(--ln); border-radius: 16px; padding: 18px; color: var(--tx); transition: border-color .15s, transform .15s; }
.g:hover { border-color: var(--b); transform: translateY(-2px); }
.g small { color: var(--b); font-weight: 700; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
.g b { color: var(--navy); line-height: 1.35; } .g span { font-size: 14px; color: var(--mu); line-height: 1.5; }
.news { margin-top: 20px; display: flex; flex-direction: column; gap: 4px; font-size: 14.5px; color: var(--mu); }
.news b { color: var(--navy); }
.empty { color: var(--mu); }
details { border: 1px solid var(--ln); border-radius: 14px; padding: 14px 18px; margin-bottom: 10px; background: #fff; }
summary { cursor: pointer; font-weight: 700; color: var(--navy); list-style: none; position: relative; padding-right: 26px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; position: absolute; right: 0; top: -2px; font-size: 22px; color: var(--b); }
details[open] summary::after { content: '−'; }
details p { margin: 10px 0 2px; }
.band { background: linear-gradient(120deg, #1d6bf3, #1453c7); color: #dbe7ff; padding: 44px 0; }
.band h2 { color: #fff; } .band p { margin: 0; }
.brow { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

/* chan trang */
.ft { background: #fff; border-top: 1px solid var(--ln); padding: 40px 0 calc(24px + env(safe-area-inset-bottom)); font-size: 14.5px; color: var(--mu); }
.frow { display: flex; justify-content: space-between; gap: 30px; }
.fco p { margin: 8px 0 0; } .fco b { color: var(--navy); }
.flinks { display: grid; grid-template-columns: repeat(3, auto); gap: 10px 30px; align-content: start; }
.flinks a { color: var(--tx); } .flinks a:hover { color: var(--b); }
.copy { margin-top: 26px; padding-top: 16px; border-top: 1px solid var(--ln); font-size: 13px; }

/* may tinh nho / tablet */
@media (max-width: 1080px) {
  .feats { grid-template-columns: repeat(3, 1fr); row-gap: 30px; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .guides { grid-template-columns: repeat(2, 1fr); }
  .nav { gap: 18px; margin-left: 10px; }
}
/* dien thoai: thiet ke rieng (logo + menu), anh dien thoai that */
@media (max-width: 860px) {
  .hdbtn { display: none; }
  .burger { display: flex; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; margin: 0; flex-direction: column; gap: 0; background: #fff; border-bottom: 1px solid var(--ln); padding: 8px 16px 18px; box-shadow: 0 18px 30px -18px rgba(15, 31, 61, .25); }
  .nav.open { display: flex; }
  .nav a { padding: 12px 4px; border-bottom: 1px solid #f0f3f8; }
  .nav .m { display: flex; margin-top: 12px; border: 1.5px solid var(--b); padding: 12px; }
  .nav .btn.ghost.m { margin-top: 14px; }
  .hd .row { height: 60px; }
  .hero { padding: 30px 0 36px; }
  .hrow, .two { grid-template-columns: 1fr; gap: 26px; }
  .lead { font-size: 16.5px; }
  .cta .btn { flex: 1 1 100%; }
  .ticks { gap: 10px 16px; }
  .hshot img.desk { display: none; }
  .hshot img.mob { display: block; width: min(300px, 82%); margin: 0 auto; border-radius: 26px; border: 1px solid var(--ln); box-shadow: 0 26px 50px -20px rgba(15, 31, 61, .45); }
  .sec { padding: 48px 0; }
  .feats { grid-template-columns: 1fr 1fr; gap: 22px 12px; }
  .card { padding: 22px 18px; border-radius: 18px; }
  .steps { grid-template-columns: 1fr; gap: 10px; }
  .steps li { padding: 16px 16px 16px 58px; }
  .steps li::before { top: 16px; }
  .dl, .brow { flex-direction: column; align-items: flex-start; }
  .dl { padding: 26px 22px; border-radius: 20px; }
  .stores { width: 100%; } .store { flex: 1 1 100%; }
  .guides { grid-template-columns: 1fr; }
  .band .btn { width: 100%; }
  .frow { flex-direction: column; }
  .flinks { grid-template-columns: 1fr 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn, .g { transition: none; } }