/* intro.skillseed.org: trang giới thiệu công ty. Inter, một màu nhấn (xanh Skillseed), không phụ thuộc gì ngoài tệp này. */

@font-face { font-family: "Inter"; font-style: normal; font-weight: 100 900; font-display: swap; src: url(/fonts/inter-vi.woff2) format("woff2"); unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB; }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 100 900; font-display: swap; src: url(/fonts/inter-latin-ext.woff2) format("woff2"); unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 100 900; font-display: swap; src: url(/fonts/inter-latin.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }

:root {
	--ink: #0b1220;
	--ink-2: #36404f;
	--muted: #5b6676;
	--line: #e4e7ec;
	--line-strong: #cfd4dc;
	--bg: #ffffff;
	--tint: #f6f7f9;
	--green: #00ad5a;
	--green-press: #009a50;
	--green-ink: #007a3d;
	--green-soft: #e6f6ed;
	--dark: #0a101c;
	--dark-2: #131b2b;
	--dark-line: #232d40;
	--radius: 14px;
	--shadow: 0 1px 2px rgb(11 18 32 / 0.05), 0 12px 32px -12px rgb(11 18 32 / 0.18);
	--wrap: 1160px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; font-size: 16px; line-height: 1.6; font-feature-settings: "cv11", "ss03"; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, h4, p, dl, dd, ol, ul, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 6px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: 16px; top: -60px; z-index: 100; background: var(--ink); color: #fff; padding: 10px 14px; border-radius: 8px; text-decoration: none; font-weight: 600; }
.skip:focus { top: 12px; }

/* ── Nút */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 40px; padding: 0 16px; border-radius: 10px; border: 1px solid transparent; font: inherit; font-size: 0.9375rem; font-weight: 600; letter-spacing: -0.005em; text-decoration: none; white-space: nowrap; cursor: pointer; transition: background-color .15s, border-color .15s, color .15s, transform .15s; }
.btn-lg { height: 50px; padding: 0 22px; font-size: 1rem; border-radius: 12px; }
.btn svg { transition: transform .15s; }
.btn:hover svg { transform: translateX(3px); }
.btn-primary { background: #00843f; color: #fff; }
.btn-primary:hover { background: #006f35; }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #1c2637; }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--ink); }

/* ── Đầu trang */
.site-header { position: sticky; top: 0; z-index: 50; background: rgb(255 255 255 / 0.86); backdrop-filter: saturate(1.4) blur(12px); -webkit-backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.site-header.scrolled { border-bottom-color: var(--line); }
.header-row { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; font-size: 1.125rem; letter-spacing: -0.02em; color: var(--ink); }
.brand img { border-radius: 8px; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav > a:not(.btn) { padding: 8px 12px; border-radius: 8px; text-decoration: none; font-size: 0.9375rem; font-weight: 500; color: var(--ink-2); transition: color .15s, background-color .15s; }
.nav > a:not(.btn):hover { color: var(--ink); background: var(--tint); }
.nav-cta { margin-left: 10px; }
.menu-btn { display: none; width: 44px; height: 44px; margin-right: -10px; border: 0; background: none; border-radius: 10px; cursor: pointer; position: relative; }
.menu-btn span { position: absolute; left: 11px; right: 11px; height: 2px; border-radius: 2px; background: var(--ink); transition: transform .2s, top .2s; }
.menu-btn span:first-child { top: 17px; }
.menu-btn span:last-child { top: 25px; }
.menu-btn[aria-expanded="true"] span:first-child { top: 21px; transform: rotate(45deg); }
.menu-btn[aria-expanded="true"] span:last-child { top: 21px; transform: rotate(-45deg); }

/* ── Mở đầu */
.hero { position: relative; overflow: hidden; padding: 56px 0 0; }
.hero-row { position: relative; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr); gap: 56px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; padding: 6px 12px 6px 10px; border: 1px solid var(--line); border-radius: 999px; background: #fff; font-size: 0.8125rem; font-weight: 600; color: var(--ink-2); }
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px var(--green-soft); }
h1 { margin-top: 22px; font-size: clamp(2.2rem, 4.4vw, 3.5rem); line-height: 1.12; letter-spacing: -0.035em; font-weight: 700; text-wrap: balance; }
.lead { margin-top: 22px; max-width: 35rem; font-size: clamp(1.0625rem, 1.3vw, 1.1875rem); line-height: 1.65; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

.hero-visual { position: relative; padding: 0 0 44px 44px; }
.frame { background: #fff; border: 1px solid var(--line-strong); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.frame-bar { display: flex; gap: 6px; align-items: center; height: 30px; padding: 0 12px; background: var(--tint); border-bottom: 1px solid var(--line); }
.frame-bar i { width: 8px; height: 8px; border-radius: 50%; background: var(--line-strong); }
.frame img { width: 100%; }
.frame-main img { aspect-ratio: 16 / 10.4; object-fit: cover; object-position: left top; }
.frame-side { position: absolute; left: 0; bottom: 0; width: 46%; box-shadow: 0 2px 4px rgb(11 18 32 / 0.06), 0 24px 48px -16px rgb(11 18 32 / 0.32); }
.frame-side .frame-bar { height: 22px; padding: 0 9px; gap: 4px; }
.frame-side .frame-bar i { width: 6px; height: 6px; }
.frame-side img { aspect-ratio: 5 / 4; object-fit: cover; object-position: right 22%; }

.stats { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 72px; border-top: 1px solid var(--line); }
.stats > div { padding: 28px 24px 36px 0; }
.stats > div + div { padding-left: 24px; border-left: 1px solid var(--line); }
.stats dt { font-size: clamp(1.9rem, 3vw, 2.6rem); font-weight: 700; letter-spacing: -0.04em; line-height: 1.1; font-variant-numeric: tabular-nums; }
.stats dd { margin-top: 8px; font-size: 0.9375rem; line-height: 1.5; color: var(--muted); max-width: 15rem; }

/* ── Khối chung */
.section { padding: 104px 0; border-top: 1px solid var(--line); }
.section-tint { background: var(--tint); }
.section-head { max-width: 46rem; margin-bottom: 52px; }
.kicker { font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--green-ink); }
h2 { margin-top: 14px; font-size: clamp(1.75rem, 3.2vw, 2.6rem); line-height: 1.18; letter-spacing: -0.03em; font-weight: 700; text-wrap: balance; }
.section-lead { margin-top: 18px; font-size: 1.0625rem; line-height: 1.65; color: var(--muted); max-width: 40rem; }
.section-lead a { color: var(--green-ink); font-weight: 600; text-underline-offset: 3px; }
h3 { font-size: 1.125rem; line-height: 1.35; letter-spacing: -0.015em; font-weight: 650; }

/* ── Dịch vụ */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.card { background: #fff; padding: 32px 30px 36px; transition: background-color .2s; }
.card:hover { background: #fbfcfd; }
.icon { width: 40px; height: 40px; padding: 8px; border-radius: 10px; background: var(--green-soft); fill: none; stroke: var(--green-ink); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.card h3 { margin-top: 22px; }
.card p { margin-top: 10px; font-size: 0.9688rem; color: var(--muted); }
.beyond { margin-top: 28px; padding: 22px 26px; border: 1px dashed var(--line-strong); border-radius: var(--radius); font-size: 1rem; color: var(--ink-2); }
.beyond strong { color: var(--ink); font-weight: 650; }
.beyond a { color: var(--green-ink); font-weight: 600; text-underline-offset: 3px; white-space: nowrap; }

/* ── Sản phẩm đã làm */
.case { display: grid; grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr); gap: 56px; align-items: center; padding: 44px; background: #fff; border: 1px solid var(--line); border-radius: 20px; }
.case + .case { margin-top: 24px; }
.case-flip .case-copy { order: 2; }
.case-flip { grid-template-columns: minmax(0, 1.14fr) minmax(0, 0.86fr); }
.tag { font-size: 0.8125rem; font-weight: 600; color: var(--green-ink); }
.case h3 { margin-top: 10px; font-size: clamp(1.4rem, 2.2vw, 1.75rem); letter-spacing: -0.025em; line-height: 1.22; font-weight: 700; }
.case-copy > p:not(.tag) { margin-top: 14px; color: var(--muted); }
.ticks { margin-top: 20px; display: grid; gap: 10px; }
.ticks li { position: relative; padding-left: 28px; font-size: 0.9688rem; color: var(--ink-2); }
.ticks li::before { content: ""; position: absolute; left: 0; top: 0.2em; width: 18px; height: 18px; border-radius: 50%; background: var(--green-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath d='M5 9.4l2.6 2.6L13 6.4' fill='none' stroke='%23007a3d' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 18px no-repeat; }
.more { display: inline-block; margin-top: 24px; font-size: 0.9375rem; font-weight: 600; color: var(--ink); text-decoration: underline; text-decoration-color: var(--line-strong); text-underline-offset: 5px; transition: text-decoration-color .15s; }
.more:hover { text-decoration-color: var(--green); }
.more::after { content: " ↗"; color: var(--muted); }
.case-shot img { aspect-ratio: 16 / 10.6; object-fit: cover; object-position: left top; }
.case-shot .frame-bar { position: relative; z-index: 1; }
.case-shot.zoom img { transform: scale(1.5); transform-origin: 50% 0; }
br.wide { display: none; }
@media (min-width: 1041px) { br.wide { display: inline; } }

.case-app { background: var(--dark); border-color: var(--dark); color: #fff; align-items: stretch; }
.case-app .tag { color: #4ade97; }
.case-app .case-copy > p:not(.tag) { color: #a9b3c4; }
.case-app .ticks li { color: #d5dbe6; }
.case-app .ticks li::before { background-color: rgb(74 222 151 / 0.14); background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 18 18'%3E%3Cpath d='M5 9.4l2.6 2.6L13 6.4' fill='none' stroke='%234ade97' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); }
.case-app .more { color: #fff; text-decoration-color: #46536b; }
.case-app .more::after { color: #8a96aa; }
.case-figures { display: grid; grid-template-rows: repeat(3, 1fr); border: 1px solid var(--dark-line); border-radius: var(--radius); background: var(--dark-2); }
.case-figures > div { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; padding: 26px 30px; }
.case-figures > div + div { border-top: 1px solid var(--dark-line); }
.case-figures dt { white-space: nowrap; font-size: clamp(2.1rem, 4vw, 3.4rem); font-weight: 700; letter-spacing: -0.045em; line-height: 1.1; font-variant-numeric: tabular-nums; }
.case-figures dd { font-size: 0.9688rem; color: #a9b3c4; text-align: right; }

/* ── Vì sao */
.section-dark { background: var(--dark); color: #fff; border-top: 0; }
.section-dark .kicker { color: #4ade97; }
.section-dark .section-head { max-width: 54rem; }
.reasons { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--dark-line); }
.reason { padding: 32px 28px 8px 0; }
.reason + .reason { padding-left: 28px; border-left: 1px solid var(--dark-line); }
.reason h3 { margin-top: 0; }
.reason p { margin-top: 10px; font-size: 0.9688rem; color: #a9b3c4; }
.stack { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 24px; margin-top: 64px; padding-top: 28px; border-top: 1px solid var(--dark-line); }
.stack p { font-size: 0.875rem; color: #8a96aa; }
.stack ul { display: flex; flex-wrap: wrap; gap: 8px; }
.stack li { padding: 6px 12px; border: 1px solid var(--dark-line); border-radius: 999px; font-size: 0.8438rem; font-weight: 500; color: #d5dbe6; background: var(--dark-2); }

/* ── Hợp tác */
.models { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.model { display: flex; flex-direction: column; padding: 32px 30px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.model:nth-child(2) { border-color: var(--ink); box-shadow: var(--shadow); }
.model h3 { font-size: 1.25rem; letter-spacing: -0.02em; }
.model p { margin-top: 12px; color: var(--muted); font-size: 0.9688rem; }
.model .fit { margin-top: auto; padding-top: 22px; color: var(--ink-2); font-size: 0.9063rem; font-weight: 500; }
.model .fit::before { content: ""; display: block; height: 1px; background: var(--line); margin-bottom: 18px; }

/* ── Quy trình */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; counter-reset: none; }
.steps li { position: relative; padding-top: 4px; }
.steps li::before { content: ""; position: absolute; top: 21px; left: 52px; right: -22px; height: 1px; background: var(--line-strong); }
.steps li:last-child::before { display: none; }
.step-n { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: var(--ink); color: #fff; font-size: 0.9375rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.steps h3 { margin-top: 22px; }
.steps p { margin-top: 8px; font-size: 0.9688rem; color: var(--muted); }

/* ── Hỏi đáp */
.faq-row { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 64px; align-items: start; }
.faq-row .section-head { margin-bottom: 0; position: sticky; top: 100px; }
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 0; font-size: 1.0625rem; font-weight: 600; letter-spacing: -0.01em; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; flex: none; width: 12px; height: 12px; margin-right: 4px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: translateY(-3px) rotate(45deg); transition: transform .2s; }
.faq details[open] summary::after { transform: translateY(3px) rotate(-135deg); }
.faq summary:hover { color: var(--green-ink); }
.faq details p { padding: 0 40px 24px 0; color: var(--muted); }

/* ── Liên hệ */
.contact { background: var(--dark); color: #fff; padding: 96px 0; }
.contact-row { display: grid; grid-template-columns: minmax(0, 1.3fr) auto; gap: 48px; align-items: center; }
.contact h2 { margin-top: 0; font-size: clamp(2rem, 4vw, 3.1rem); }
.contact p { margin-top: 18px; max-width: 36rem; font-size: 1.0625rem; color: #a9b3c4; }
.contact-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; }
.contact-mail { font-size: 1.0625rem; font-weight: 500; color: #d5dbe6; text-underline-offset: 4px; text-decoration-color: #46536b; }
.contact-mail:hover { text-decoration-color: #4ade97; }

/* ── Chân trang */
.site-footer { background: var(--dark); color: #a9b3c4; border-top: 1px solid var(--dark-line); padding: 56px 0 32px; font-size: 0.9375rem; }
.footer-row { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
.site-footer .brand { color: #fff; }
.footer-brand p { margin-top: 14px; max-width: 22rem; }
.site-footer h4 { font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: #8a96aa; margin-bottom: 14px; }
.site-footer nav a { display: block; padding: 5px 0; text-decoration: none; color: #d5dbe6; }
.site-footer nav a:hover { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.footer-legal { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--dark-line); font-size: 0.875rem; color: #8a96aa; }
.footer-legal.wrap { padding-left: 24px; padding-right: 24px; }

/* ── Màn hình hẹp */
@media (max-width: 1040px) {
	.hero-row { grid-template-columns: 1fr; gap: 48px; }
	.hero-visual { max-width: 640px; }
	.cards { grid-template-columns: repeat(2, 1fr); }
	.reasons { grid-template-columns: repeat(2, 1fr); }
	.reason:nth-child(odd) { padding-left: 0; border-left: 0; }
	.reason:nth-child(n+3) { border-top: 1px solid var(--dark-line); }
	.reason { padding-bottom: 32px; }
	.case, .case-flip { grid-template-columns: 1fr; gap: 36px; padding: 36px; }
	.case-flip .case-copy { order: 0; }
	.case-figures { grid-template-rows: none; grid-template-columns: repeat(3, 1fr); }
	.case-figures > div { flex-direction: column; align-items: flex-start; gap: 6px; padding: 22px 24px; }
	.case-figures > div + div { border-top: 0; border-left: 1px solid var(--dark-line); }
	.case-figures dd { text-align: left; }
	.steps { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
	.steps li:nth-child(2)::before { display: none; }
	.faq-row { grid-template-columns: 1fr; gap: 40px; }
	.faq-row .section-head { position: static; }
	.contact-row { grid-template-columns: 1fr; }
	.footer-row { grid-template-columns: 1fr 1fr 1fr; }
	.footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
	.menu-btn { display: block; }
	.nav { position: absolute; top: 68px; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 8px 16px 20px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 24px 32px -24px rgb(11 18 32 / 0.25); }
	.nav.open { display: flex; }
	.nav > a:not(.btn) { padding: 14px 8px; font-size: 1.0625rem; border-bottom: 1px solid var(--line); border-radius: 0; }
	.nav-cta { margin: 16px 0 0; height: 48px; }
	.models { grid-template-columns: 1fr; }
	.stats { grid-template-columns: repeat(2, 1fr); }
	.stats > div:nth-child(3) { padding-left: 0; border-left: 0; }
	.stats > div:nth-child(n+3) { border-top: 1px solid var(--line); }
}

@media (max-width: 640px) {
	.wrap, .footer-legal.wrap { padding-left: 16px; padding-right: 16px; }
	.hero { padding-top: 32px; }
	.hero-visual { padding: 0 0 32px 24px; }
	.actions .btn { flex: 1 1 100%; }
	.stats { margin-top: 48px; }
	.stats > div { padding: 22px 12px 26px 0; }
	.stats > div + div { padding-left: 16px; }
	.stats > div:nth-child(3) { padding-left: 0; }
	.section { padding: 72px 0; }
	.section-head { margin-bottom: 36px; }
	.cards { grid-template-columns: 1fr; }
	.card { padding: 26px 22px 28px; }
	.beyond { padding: 20px; }
	.beyond a { white-space: normal; }
	.case, .case-flip { padding: 24px 20px; border-radius: 16px; }
	.case-figures { grid-template-columns: 1fr; }
	.case-shot img { transform: scale(1.45); transform-origin: 0 0; }
	.case-shot.zoom img { transform: scale(2); transform-origin: 50% 0; }
	.case-figures > div { flex-direction: row; align-items: baseline; padding: 18px 20px; }
	.case-figures > div + div { border-left: 0; border-top: 1px solid var(--dark-line); }
	.case-figures dd { text-align: right; }
	.reasons { grid-template-columns: 1fr; }
	.reason, .reason + .reason { padding: 26px 0; border-left: 0; }
	.reason + .reason { border-top: 1px solid var(--dark-line); }
	.stack { margin-top: 32px; }
	.steps { grid-template-columns: 1fr; row-gap: 0; }
	.steps li { display: grid; grid-template-columns: 36px 1fr; column-gap: 16px; padding-bottom: 32px; }
	.steps li::before { display: block !important; top: 44px; bottom: 4px; left: 17.5px; right: auto; width: 1px; height: auto; }
	.steps li:last-child { padding-bottom: 0; }
	.steps li:last-child::before { display: none !important; }
	.steps h3 { margin-top: 6px; grid-column: 2; }
	.steps p { grid-column: 2; }
	.faq details p { padding-right: 0; }
	.contact { padding: 72px 0; }
	.contact-actions .btn { width: 100%; }
	.contact-actions { align-items: stretch; }
	.footer-row { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
}

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after { transition: none !important; }
}