@font-face {
  font-family: "Roboto";
  src:
    url("/assets/fonts/roboto/roboto-vietnamese.woff2") format("woff2"),
    url("/assets/fonts/roboto/roboto-400.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  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: "Roboto";
  src:
    url("/assets/fonts/roboto/roboto-latin-ext.woff2") format("woff2"),
    url("/assets/fonts/roboto/roboto-400.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  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-20C0,
    U+2113,
    U+2C60-2C7F,
    U+A720-A7FF;
}

@font-face {
  font-family: "Roboto";
  src:
    url("/assets/fonts/roboto/roboto-latin.woff2") format("woff2"),
    url("/assets/fonts/roboto/roboto-400.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  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;
}

@font-face {
  font-family: "Roboto";
  src:
    url("/assets/fonts/roboto/roboto-vietnamese.woff2") format("woff2"),
    url("/assets/fonts/roboto/roboto-500.ttf") format("truetype");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  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: "Roboto";
  src:
    url("/assets/fonts/roboto/roboto-latin-ext.woff2") format("woff2"),
    url("/assets/fonts/roboto/roboto-500.ttf") format("truetype");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  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-20C0,
    U+2113,
    U+2C60-2C7F,
    U+A720-A7FF;
}

@font-face {
  font-family: "Roboto";
  src:
    url("/assets/fonts/roboto/roboto-latin.woff2") format("woff2"),
    url("/assets/fonts/roboto/roboto-500.ttf") format("truetype");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  unicode-range:
    U+0000-00FF,
    U+0131,
    U+0152-0153,
    U+02BB-02BC,
    U+02C6,
    U+02DA,
    U+02DC,
    U+0304,
    U+0308,
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    U+2122,
    U+2191,
    U+2193,
    U+2212,
    U+2215,
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}

@font-face {
  font-family: "Roboto";
  src:
    url("/assets/fonts/roboto/roboto-vietnamese.woff2") format("woff2"),
    url("/assets/fonts/roboto/roboto-700.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  unicode-range:
    U+0102-0103,
    U+0110-0111,
    U+0128-0129,
    U+0168-0169,
    U+01A0-01A1,
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    U+0308-0309,
    U+0323,
    U+0329,
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}

@font-face {
  font-family: "Roboto";
  src:
    url("/assets/fonts/roboto/roboto-latin-ext.woff2") format("woff2"),
    url("/assets/fonts/roboto/roboto-700.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  unicode-range:
    U+0100-02BA,
    U+02BD-02C5,
    U+02C7-02CC,
    U+02CE-02D7,
    U+02DD-02FF,
    U+0304,
    U+0308,
    U+0329,
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}

@font-face {
  font-family: "Roboto";
  src:
    url("/assets/fonts/roboto/roboto-latin.woff2") format("woff2"),
    url("/assets/fonts/roboto/roboto-700.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  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 {
  --color-primary: #09203f;
  --color-primary-strong: #06172e;
  --color-accent: #fc6702;
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-surface-alt: #eef3fa;
  --color-text: #0f2139;
  --color-text-muted: #4a5f79;
  --color-border: #d2dbe8;
  --color-link: #0b376d;
  --color-focus: #fc6702;
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --shadow-soft: 0 8px 24px rgba(8, 25, 48, 0.08);
  --maxw: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  color: var(--color-text);
  background:
    radial-gradient(960px 580px at 95% -10%, #e1e9f6 0, transparent 62%),
    radial-gradient(780px 420px at -12% 22%, #eaf0f8 0, transparent 60%),
    var(--color-bg);
  font-family: "Roboto", "Segoe UI", Arial, sans-serif;
  line-height: 1.64;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
  z-index: 999;
  color: #fff;
  background: var(--color-primary);
  border-radius: var(--radius-xs);
  padding: 8px 10px;
}

.container {
  width: min(100% - 32px, var(--maxw));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(8px);
  background: rgba(247, 248, 250, 0.94);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 80px;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand:hover {
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: clamp(160px, 25vw, 210px);
  height: auto;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: #fff;
  color: var(--color-primary);
  padding: 8px 12px;
  font: inherit;
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 6px;
}

.nav-links a {
  border-radius: var(--radius-xs);
  padding: 7px 10px;
  color: #3e5574;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.2;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  text-decoration: none;
  background: #e8eef8;
  color: var(--color-primary);
}

.nav-links a[aria-current="page"] {
  color: var(--color-primary);
  background: #e4ecf9;
  border: 1px solid #c5d4ea;
}

.lang-switch {
  color: var(--color-primary) !important;
  border: 1px solid #cad6e7;
  background: #fff;
  font-weight: 700;
}

.page-main {
  padding: 24px 0 56px;
}

.breadcrumb {
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.breadcrumb a {
  color: var(--color-text-muted);
}

.hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: clamp(24px, 3.5vw, 44px);
  box-shadow: var(--shadow-soft);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("/assets/visual/hero-grid.svg");
  background-repeat: no-repeat;
  background-position: right -80px top -46px;
  background-size: 75%;
  opacity: 0.52;
  pointer-events: none;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero.hero-has-media {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  align-items: center;
  gap: clamp(16px, 2.8vw, 30px);
}

.hero-copy {
  min-width: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border: 1px solid #ccd9eb;
  border-radius: 999px;
  color: var(--color-primary);
  background: #eef3fb;
  font-size: 0.85rem;
  font-weight: 500;
}

.hero h1 {
  margin: 14px 0 10px;
  line-height: 1.2;
  font-size: clamp(1.8rem, 4vw, 2.62rem);
}

.hero p {
  margin: 0;
  max-width: 780px;
  color: var(--color-text-muted);
}

.hero-meta {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid #d2deef;
  color: #2f4663;
  background: #f4f8ff;
  font-size: 0.83rem;
}

.hero-media {
  margin: 0;
  border: 1px solid #d2dced;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #edf4ff;
  box-shadow: 0 12px 28px rgba(8, 29, 57, 0.12);
}

.hero-media img {
  display: block;
  width: 100%;
  height: auto;
}

.section {
  margin-top: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: clamp(20px, 3vw, 32px);
}

.section:nth-of-type(2n) {
  background:
    linear-gradient(0deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.96)),
    url("/assets/visual/section-mesh.svg") right top / 60% no-repeat;
}

.section:nth-of-type(3n) {
  background:
    linear-gradient(0deg, rgba(255, 255, 255, 0.97), rgba(255, 255, 255, 0.97)),
    url("/assets/visual/section-flow.svg") right top / 58% no-repeat;
}

.section h2 {
  margin: 0 0 10px;
  line-height: 1.24;
  font-size: clamp(1.32rem, 2.4vw, 1.78rem);
}

.section > p {
  margin: 0;
  color: var(--color-text-muted);
}

.section > p + p {
  margin-top: 10px;
}

.section-visual {
  margin: 16px 0 0;
  border: 1px solid #d4ddec;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #f0f5fd;
}

.section-visual img {
  display: block;
  width: 100%;
  height: auto;
}

.grid {
  margin-top: var(--space-4);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.card {
  border: 1px solid #d7dfea;
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  padding: 14px;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.card-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.card h3 {
  margin: 0;
  line-height: 1.34;
  font-size: 1rem;
}

.card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

.bullet-list {
  margin: 14px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.bullet-list li {
  color: var(--color-text-muted);
}

.related-links {
  margin-top: 14px;
  border-top: 1px dashed #d4ddeb;
  padding-top: 12px;
}

.related-links h3 {
  margin: 0 0 8px;
  font-size: 0.95rem;
  color: #32485f;
}

.related-links ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}

.timeline {
  margin: 14px 0 0;
  padding-left: 22px;
  display: grid;
  gap: 10px;
}

.timeline li {
  color: var(--color-text-muted);
}

.timeline h3 {
  margin: 0 0 4px;
  color: var(--color-primary);
  font-size: 1rem;
}

.timeline p {
  margin: 0;
}

.faq-list {
  margin-top: 12px;
  display: grid;
  gap: 10px;
}

.faq-item {
  border: 1px solid #d4ddea;
  border-radius: var(--radius-xs);
  background: #f8fbff;
  padding: 10px 12px;
}

.faq-item summary {
  cursor: pointer;
  color: #233855;
  font-weight: 500;
}

.faq-item p {
  margin: 10px 0 0;
  color: var(--color-text-muted);
}

.resource-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.resource-item {
  border: 1px solid #d2dce9;
  border-radius: var(--radius-sm);
  background: #f9fbff;
  padding: 12px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.resource-main {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.resource-thumb {
  display: block;
  width: min(100%, 320px);
  height: auto;
  border-radius: 10px;
  border: 1px solid #d5deeb;
  background: #edf3fb;
}

.resource-top {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.resource-main h3 {
  margin: 0 0 4px;
  font-size: 0.98rem;
}

.resource-main p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.lang-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid #c4d7f0;
  background: #ecf3ff;
  color: #22476f;
  padding: 4px 9px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  min-width: 34px;
}

.resource-side {
  display: grid;
  justify-items: end;
  gap: 8px;
  flex-shrink: 0;
}

.status-pill {
  flex-shrink: 0;
  border-radius: 999px;
  border: 1px solid #c7d7ea;
  background: #edf4ff;
  color: #26466d;
  padding: 5px 10px;
  font-size: 0.82rem;
  font-weight: 500;
}

.resource-download {
  margin-left: 0;
}

.notice {
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-xs);
  background: #fff4ec;
  padding: 14px;
}

.notice p {
  margin: 0;
  color: #62442f;
}

.contact-shell {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.contact-card {
  border: 1px solid #d5dfea;
  border-radius: var(--radius-sm);
  background: #f8fbff;
  padding: 14px;
}

.contact-card h3 {
  margin: 0 0 10px;
  color: var(--color-primary);
  font-size: 1rem;
}

.contact-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.contact-list li {
  color: #334b68;
  font-size: 0.95rem;
}

.map-placeholder {
  margin-top: 12px;
  border: 1px dashed #c7d7ea;
  border-radius: var(--radius-xs);
  background: #eef4ff;
  color: #516885;
  padding: 14px;
  font-size: 0.9rem;
}

.contact-form {
  display: grid;
  gap: 10px;
}

.contact-form label {
  display: grid;
  gap: 6px;
  color: #2c425e;
  font-size: 0.91rem;
}

.contact-form input,
.contact-form textarea {
  border: 1px solid #c7d6ea;
  border-radius: var(--radius-xs);
  padding: 10px;
  font: inherit;
  color: var(--color-text);
  background: #fff;
}

.contact-form button,
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  border: 1px solid transparent;
  padding: 10px 14px;
  font-weight: 500;
  font-size: 0.94rem;
}

.contact-form button,
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.contact-form button:hover,
.btn-primary:hover {
  background: var(--color-primary-strong);
  text-decoration: none;
}

.btn-secondary {
  margin-left: 8px;
  border-color: #c8d6e8;
  color: #23456e;
  background: #fff;
}

.btn-secondary:hover {
  text-decoration: none;
  background: #eff4fe;
}

.form-note {
  margin: 10px 0 0;
  color: #536a84;
  font-size: 0.85rem;
}

.cta-panel {
  border: 1px solid #c9d7ea;
  background: linear-gradient(180deg, #f9fbfe, #edf3fb);
}

.cta-panel h2 {
  margin-bottom: 6px;
}

.cta-panel p {
  margin: 0 0 10px;
}

.site-footer {
  margin-top: 36px;
  border-top: 1px solid #102a4d;
  background: var(--color-primary);
  color: #d9e4f3;
  padding: 28px 0 36px;
}

.footer-grid {
  display: grid;
  gap: 14px;
}

.footer-brand-wrap {
  display: grid;
  gap: 8px;
}

.footer-logo {
  width: clamp(176px, 28vw, 220px);
  height: auto;
}

.footer-slogan {
  margin: 0;
  color: #d5e2f5;
  font-size: 0.92rem;
}

.footer-heading {
  margin: 0 0 8px;
  color: #f1f6ff;
  font-size: 0.95rem;
}

.footer-meta {
  color: #d5e1f2;
  font-size: 0.92rem;
}

.footer-meta p {
  margin: 5px 0;
}

.footer-links-wrap {
  display: grid;
  gap: 6px;
}

.footer-links,
.ecosystem-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-links a,
.ecosystem-links a {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  border: 1px solid rgba(218, 230, 248, 0.28);
  background: rgba(255, 255, 255, 0.06);
  color: #f4f8ff;
  padding: 6px 10px;
  font-size: 0.88rem;
}

.footer-links a:hover,
.ecosystem-links a:hover {
  text-decoration: none;
  background: rgba(255, 255, 255, 0.14);
}

.footer-meta a {
  color: #f8fbff;
}

@media (max-width: 980px) {
  .hero.hero-has-media {
    grid-template-columns: 1fr;
  }

  .hero-media {
    max-width: 700px;
  }

  .grid,
  .contact-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .header-inner {
    min-height: 72px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
    box-shadow: 0 14px 36px rgba(11, 28, 52, 0.16);
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a,
  .lang-switch {
    width: 100%;
  }

  .btn-secondary {
    margin-left: 0;
    margin-top: 8px;
  }

  .resource-item {
    flex-direction: column;
  }

  .resource-side {
    width: 100%;
    justify-items: start;
  }
}