:root {
    --blue: #0866c5;
    --blue-dark: #031a4b;
    --blue-deep: #010d2e;
    --red: #ed1c24;
    --ink: #061638;
    --muted: #65728a;
    --line: #e5eaf2;
    --soft: #f4f7fb;
    --green: #16a269;
    --shell: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 82px; }
body {
    margin: 0;
    color: var(--ink);
    font-family: "Be Vietnam Pro", Arial, sans-serif;
    background: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; height: auto; display: block; }
.shell {
    width: min(var(--shell), calc(100% - 40px));
    margin-left: auto;
    margin-right: auto;
}

.site-header {
    position: fixed;
    z-index: 1000;
    inset: 0 0 auto;
    height: 76px;
    color: #fff;
    background: rgba(1, 13, 46, .92);
    border-bottom: 1px solid rgba(255,255,255,.1);
    backdrop-filter: blur(14px);
}
.nav-wrap {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.brand { display: flex; align-items: center; width: 150px; flex: 0 0 auto; }
.brand img { width: 100%; }
.main-nav {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 28px;
}
.main-nav a {
    color: rgba(255,255,255,.9);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
}
.main-nav a:hover { color: #fff; }
.menu-toggle {
    display: none;
    border: 0;
    color: #fff;
    background: transparent;
    font-size: 22px;
    padding: 8px;
}
.button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    min-height: 44px;
    padding: 0 24px;
    border: 0;
    border-radius: 9px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    transition: transform .2s, box-shadow .2s, background .2s;
}
.button:hover { transform: translateY(-2px); }
.button-red {
    color: #fff;
    background: linear-gradient(135deg, #f12931, #d90912);
    box-shadow: 0 10px 28px rgba(237,28,36,.25);
}
.header-cta {
    flex: 0 0 auto;
    min-height: 40px;
    padding: 0 18px;
    font-size: 12px;
    text-transform: uppercase;
}

.hero {
    position: relative;
    overflow: hidden;
    color: #fff;
    background:
        radial-gradient(circle at 78% 48%, #063f8e 0, #052968 20%, transparent 43%),
        linear-gradient(125deg, #010a25 5%, #021745 55%, #020b28 100%);
}
.hero::after {
    content: "";
    position: absolute;
    right: -12%;
    bottom: -28%;
    width: 58%;
    height: 72%;
    border: 2px solid rgba(23,129,255,.35);
    border-radius: 50%;
    box-shadow: 0 0 50px rgba(0,126,255,.35), inset 0 0 50px rgba(0,126,255,.15);
    pointer-events: none;
}
.hero-grid {
    position: absolute;
    inset: 0;
    opacity: .18;
    background-image:
        linear-gradient(rgba(30,126,255,.12) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30,126,255,.12) 1px, transparent 1px);
    background-size: 52px 52px;
    mask-image: linear-gradient(to right, transparent, #000);
}
.hero-inner {
    position: relative;
    z-index: 2;
    min-height: 700px;
    padding: 120px 0 72px;
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr);
    gap: 20px 24px;
    align-items: center;
}
.hero-copy { min-width: 0; max-width: none; }
.eyebrow {
    display: inline-flex;
    padding: 6px 12px;
    border: 1px solid rgba(255,255,255,.24);
    border-radius: 7px;
    color: #fff;
    background: rgba(24,111,242,.7);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .08em;
}
.eyebrow-light {
    color: var(--blue);
    border-color: #d9e7fb;
    background: #edf5ff;
}
.hero h1 {
    margin: 16px 0 14px;
    max-width: 12ch;
    font-size: clamp(44px, 5.6vw, 72px);
    line-height: 1.08;
    letter-spacing: -.04em;
    text-wrap: balance;
}
.hero h1 span {
    color: #1e7cff;
    text-shadow: 0 0 26px rgba(30,124,255,.3);
}
.hero-lead {
    margin: 0 0 22px;
    color: rgba(255,255,255,.92);
    font-size: 16px;
    line-height: 1.45;
}
.hero-lead-line {
    display: block;
    width: max-content;
    max-width: 100%;
    white-space: nowrap;
    font-size: clamp(14px, 1.05vw, 17px);
}
.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
}
.hero-tags span {
    padding: 10px 14px;
    border: 1px solid rgba(69,143,255,.45);
    border-radius: 8px;
    background: rgba(2,19,57,.68);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
}
.hero-tags i { margin-right: 8px; color: #69a5ff; }
.button-large {
    min-width: 230px;
    min-height: 56px;
    font-size: 15px;
    text-transform: uppercase;
    position: relative;
    z-index: 3;
}
.cta-outline {
    border: 2px solid #ffd2d4 !important;
    box-shadow: 0 10px 28px rgba(237,28,36,.28), 0 0 0 1px rgba(237,28,36,.35) inset;
}
.hero-copy small {
    display: block;
    margin-top: 14px;
    color: rgba(255,255,255,.72);
}
.hero-copy small i { margin-right: 6px; }
.hero-visual {
    position: relative;
    min-height: 460px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
}
.signal {
    position: absolute;
    border: 2px solid rgba(65,153,255,.35);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}
.signal-one { width: min(420px, 86%); aspect-ratio: 1; }
.signal-two { width: min(520px, 104%); aspect-ratio: 1; opacity: .3; }
.five-g-mark {
    position: absolute;
    z-index: 3;
    top: 4%;
    left: 50%;
    color: transparent;
    font-size: clamp(88px, 10vw, 132px);
    font-weight: 800;
    line-height: .9;
    letter-spacing: -.06em;
    -webkit-text-stroke: 3px rgba(80,160,255,.95);
    text-shadow: 0 0 28px rgba(0,108,255,.55);
    transform: translateX(-18%) skew(-6deg);
    pointer-events: none;
    user-select: none;
    mix-blend-mode: screen;
}
.device-stage {
    position: relative;
    z-index: 2;
    width: min(100%, 420px);
    margin: 48px auto 0;
    filter: drop-shadow(0 28px 40px rgba(0,0,0,.45));
}
.device-image {
    width: 100%;
    margin: 0 auto;
    object-fit: contain;
}

.section { padding: 72px 0; }
.tight-section { padding: 56px 0; }
.section-heading {
    max-width: 820px;
    margin: 0 auto 36px;
    text-align: center;
}
.compact-heading { margin-bottom: 28px; }
.section-heading h2 {
    margin: 10px 0 6px;
    font-size: clamp(28px, 3.2vw, 40px);
    line-height: 1.28;
    letter-spacing: -.03em;
    text-wrap: balance;
}
.section-heading p { margin: 0; color: var(--muted); }

.pain-section {
    position: relative;
    z-index: 3;
    margin-top: -24px;
    padding: 48px 0 56px;
    border-radius: 28px 28px 0 0;
    background: #fff;
}
.pain-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}
.pain-card {
    display: grid;
    grid-template-columns: 64px 1fr;
    gap: 6px 14px;
    align-items: center;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 16px 38px rgba(14,48,94,.08);
}
.pain-card .icon-box {
    grid-row: span 3;
    display: grid;
    place-items: center;
    width: 64px;
    height: 64px;
    border-radius: 18px;
    color: var(--blue);
    background: #eaf3ff;
    font-size: 26px;
}
.pain-card p,
.pain-card strong {
    margin: 0;
    font-size: 17px;
    line-height: 1.45;
    font-weight: 600;
}
.pain-card > i { color: var(--blue); font-size: 16px; }
.pain-card strong { color: var(--green); font-size: 17px; }

.feature-grid,
.audience-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
}
.feature-grid article,
.audience-grid article {
    padding: 22px 16px;
    border: 1px solid var(--line);
    border-radius: 15px;
    background: linear-gradient(#fff, #f9fbff);
    text-align: center;
}
.feature-grid i {
    display: grid;
    place-items: center;
    width: 54px;
    height: 54px;
    margin: 0 auto 14px;
    border-radius: 15px;
    color: #1e70e6;
    background: #eaf3ff;
    font-size: 22px;
}
.feature-grid h3,
.audience-grid h3 {
    margin: 0 0 8px;
    font-size: 17px;
    line-height: 1.35;
    text-wrap: balance;
}
.feature-grid p,
.audience-grid p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.5;
}
.audience-grid article { min-height: 200px; }
.audience-grid i {
    margin-bottom: 16px;
    color: var(--blue);
    font-size: 34px;
}

.comparison-section { background: var(--soft); }
.comparison {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
    overflow: hidden;
    border-radius: 22px;
    box-shadow: 0 22px 50px rgba(4,26,70,.12);
}
.compare-side {
    display: grid;
    grid-template-rows: 92px 1fr;
    min-height: 380px;
    padding: 36px 42px 40px;
}
.compare-head {
    display: flex;
    align-items: center;
    min-height: 72px;
}
.compare-side img {
    width: 170px;
    margin: 0;
}
.compare-side h3 {
    margin: 0;
    font-size: 26px;
    line-height: 1.2;
    text-transform: uppercase;
}
.compare-side ul {
    list-style: none;
    margin: 0;
    padding: 8px 0 0;
    display: grid;
    grid-template-rows: repeat(5, minmax(48px, auto));
    align-content: start;
}
.compare-side li {
    position: relative;
    margin: 0;
    padding: 8px 0 8px 30px;
    font-size: 16px;
    line-height: 1.4;
    display: flex;
    align-items: center;
    min-height: 48px;
}
.compare-side li::before {
    position: absolute;
    left: 0;
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
}
.compare-wifi {
    color: #fff;
    background: radial-gradient(circle at 90% 20%, #0b69d6, transparent 40%), var(--blue-dark);
}
.compare-wifi li::before { content: "\f058"; color: #68b1ff; }
.compare-fiber { background: #fff; }
.compare-fiber li::before { content: "\f00d"; color: var(--red); }
.versus {
    position: absolute;
    z-index: 2;
    top: 50%;
    left: 50%;
    display: grid;
    place-items: center;
    width: 72px;
    height: 72px;
    color: #fff;
    border: 6px solid #fff;
    border-radius: 50%;
    background: var(--blue);
    box-shadow: 0 0 25px rgba(0,102,220,.5);
    font-size: 22px;
    font-weight: 800;
    transform: translate(-50%, -50%);
}

.packages-section {
    color: #fff;
    background: radial-gradient(circle at 50% 0, #0a4291, transparent 40%), var(--blue-deep);
}
.heading-inverse p { color: rgba(255,255,255,.7); }
.filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px 24px;
    margin-bottom: 24px;
}
.filter-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}
.filter-group > span {
    margin-right: 4px;
    color: rgba(255,255,255,.7);
    font-size: 12px;
    font-weight: 700;
}
.filter {
    padding: 8px 16px;
    color: rgba(255,255,255,.8);
    border: 1px solid rgba(255,255,255,.16);
    border-radius: 8px;
    background: rgba(255,255,255,.06);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
}
.filter.active {
    color: #fff;
    border-color: #1b73ee;
    background: #1261cf;
}
.package-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}
.package-card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 390px;
    padding: 28px 22px 22px;
    color: var(--ink);
    border: 1px solid transparent;
    border-radius: 14px;
    background: #fff;
}
.package-card:nth-child(n+5) { display: none; }
.package-grid.expanded .package-card { display: flex; }
.package-card.hidden { display: none !important; }
.package-card.featured {
    border-color: #3c8dff;
    box-shadow: 0 0 0 3px rgba(60,141,255,.12);
}
.package-badge {
    position: absolute;
    top: -10px;
    right: 14px;
    padding: 4px 10px;
    color: #fff;
    border-radius: 5px;
    background: var(--red);
    font-size: 9px;
    font-weight: 800;
}
.package-badge-blue { background: #0b66d6; right: auto; left: 14px; }
.package-card h3 {
    margin: 0;
    color: #003d92;
    font-size: 24px;
    text-align: center;
}
.speed {
    display: block;
    margin: 4px 0 12px;
    color: #3e4d68;
    font-size: 14px;
    text-align: center;
}
.monthly {
    display: flex;
    justify-content: center;
    align-items: baseline;
    gap: 4px;
    color: var(--blue);
}
.monthly b { font-size: 22px; }
.monthly span { color: var(--muted); font-size: 11px; }
.package-card > p {
    margin: 2px 0 9px;
    color: var(--muted);
    font-size: 12px;
    text-align: center;
}
.device-type {
    align-self: center;
    padding: 4px 11px;
    color: #0c8957;
    border-radius: 99px;
    background: #daf7e9;
    font-size: 10px;
    font-weight: 800;
}
.package-card ul {
    list-style: none;
    margin: 16px 0;
    padding: 0;
    font-size: 13px;
}
.package-card li { margin: 7px 0; }
.package-card li::before {
    content: "✓";
    margin-right: 8px;
    color: var(--green);
    font-weight: 800;
}
.package-select {
    margin-top: auto;
    min-height: 46px;
    color: var(--red);
    border: 2px solid var(--red);
    border-radius: 8px;
    background: #fff;
    font-size: 14px;
    font-weight: 800;
    text-transform: uppercase;
    cursor: pointer;
}
.package-select:hover {
    color: #fff;
    border-color: var(--red);
    background: var(--red);
}
.show-packages {
    display: flex;
    gap: 9px;
    align-items: center;
    margin: 28px auto 0;
    padding: 10px 20px;
    color: #fff;
    border: 1px solid rgba(255,255,255,.38);
    border-radius: 8px;
    background: transparent;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
}
.package-notes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}
.package-notes p {
    margin: 0;
    padding: 16px 18px;
    color: rgba(255,255,255,.85);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 10px;
    background: rgba(255,255,255,.05);
    font-size: 14px;
    line-height: 1.55;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}
.steps article {
    position: relative;
    padding: 34px 24px 28px;
    border: 1px solid var(--line);
    border-radius: 17px;
    background: #fff;
    text-align: center;
}
.steps article > span {
    position: absolute;
    top: -17px;
    left: 50%;
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    color: #fff;
    border-radius: 50%;
    background: var(--blue);
    font-size: 11px;
    font-weight: 800;
    transform: translateX(-50%);
}
.steps article > i {
    margin: 10px 0 14px;
    color: var(--blue);
    font-size: 34px;
}
.steps h3 {
    margin: 0 0 8px;
    font-size: 18px;
    text-wrap: balance;
}
.steps p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.5;
}
.registration-steps { margin-bottom: 56px; }
.install-heading { margin-bottom: 36px; }
.install-steps article:nth-child(2) > span { background: #f15a27; }
.install-steps article:nth-child(3) > span { background: #13ae77; }

.consult-section {
    color: #fff;
    background: linear-gradient(115deg, #02143f, #073b84);
}
.consult-grid {
    display: grid;
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    gap: 48px;
    align-items: center;
}
.consult-copy h2 {
    margin: 14px 0;
    font-size: clamp(28px, 3.6vw, 44px);
    line-height: 1.25;
    text-wrap: balance;
}
.consult-copy > p { color: rgba(255,255,255,.75); font-size: 15px; }
.consult-copy ul { list-style: none; margin: 22px 0 0; padding: 0; }
.consult-copy li { margin: 12px 0; font-size: 15px; }
.consult-copy li i { margin-right: 10px; color: #4db3ff; }
.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}
.social-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 44px;
    padding: 0 16px;
    border-radius: 999px;
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
}
.social-link img {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    object-fit: cover;
}
.zalo-link { background: #0068ff; }
.fb-link { background: #1877f2; }

.consult-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 28px;
    border: 2px solid rgba(237, 28, 36, .55);
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 25px 60px rgba(0,0,0,.25);
}
.field { display: flex; flex-direction: column; gap: 7px; }
.field-full { grid-column: 1 / -1; }
.field label {
    color: var(--ink);
    font-size: 13px;
    font-weight: 700;
}
.field label span { color: var(--red); }
.field input,
.field select,
.field textarea {
    width: 100%;
    min-height: 48px;
    padding: 10px 13px;
    color: var(--ink);
    border: 1px solid #dce2eb;
    border-radius: 8px;
    outline: none;
    background: #f9fbfd;
    font-size: 14px;
}
.field textarea { resize: vertical; min-height: 96px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(8,102,197,.1);
}
.consent {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    color: var(--muted);
    font-size: 12px;
}
.consent input { margin-top: 3px; }
.submit-button {
    width: 100%;
    min-height: 54px;
    font-size: 16px;
    border: 2px solid #ffb4b7 !important;
}
.form-message {
    display: none;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
}
.form-message.success { display: block; color: #076944; background: #ddf8eb; }
.form-message.error { display: block; color: #a80e15; background: #ffeaeb; }
.honeypot { position: absolute !important; left: -9999px !important; }

.testimonials { background: var(--soft); }
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}
.testimonial-grid blockquote {
    margin: 0;
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 14px 34px rgba(14,48,94,.06);
}
.stars { color: #ffad0d; letter-spacing: 3px; }
.testimonial-grid blockquote > p {
    min-height: 92px;
    color: #3f4e67;
    font-size: 15px;
    line-height: 1.55;
}
.testimonial-grid footer {
    display: flex;
    gap: 12px;
    align-items: center;
}
.testimonial-grid footer > span {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    color: #fff;
    border-radius: 50%;
    background: var(--blue);
    font-size: 11px;
    font-weight: 800;
}
.testimonial-grid footer strong,
.testimonial-grid footer small { display: block; }
.testimonial-grid footer strong { font-size: 14px; }
.testimonial-grid footer small { color: var(--muted); font-size: 12px; }

.landing-footer { color: #fff; background: #010b24; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.15fr .75fr 1.1fr;
    gap: 40px;
    padding-top: 48px;
    padding-bottom: 36px;
}
.footer-logo-wifi { width: 170px; margin-bottom: 14px; }
.footer-company .footer-logo-mobi {
    width: 148px;
    margin-top: 16px;
    /* Giữ màu gốc logo đỏ-trắng, không invert */
    filter: none;
}
.footer-grid h3 {
    margin-top: 0;
    font-size: 14px;
    text-transform: uppercase;
    line-height: 1.35;
}
.footer-grid h3 small {
    display: block;
    margin-top: 6px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .02em;
    text-transform: uppercase;
    color: rgba(255,255,255,.78);
}
.footer-grid p {
    margin: 8px 0;
    color: rgba(255,255,255,.65);
    font-size: 13px;
}
.footer-grid i { width: 20px; color: #4e9eff; }
.footer-social {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 14px;
}
.footer-social a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #9ec7ff;
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
}
.footer-social img {
    width: 20px;
    height: 20px;
    border-radius: 5px;
    object-fit: cover;
}
.copyright {
    padding: 16px 20px;
    color: rgba(255,255,255,.4);
    border-top: 1px solid rgba(255,255,255,.08);
    font-size: 12px;
    text-align: center;
}

.floating-call,
.floating-zalo,
.floating-fb {
    position: fixed;
    z-index: 30;
    right: 18px;
    display: grid;
    place-items: center;
    width: 54px;
    height: 54px;
    color: #fff;
    border: 4px solid rgba(255,255,255,.85);
    border-radius: 50%;
    box-shadow: 0 8px 25px rgba(0,0,0,.25);
    text-decoration: none;
}
.floating-call {
    bottom: 22px;
    background: var(--red);
}
.floating-zalo {
    bottom: 88px;
    padding: 0;
    overflow: hidden;
    background: #fff;
    border-color: rgba(255,255,255,.95);
}
.floating-zalo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.floating-fb {
    bottom: 154px;
    background: #1877f2;
    font-size: 22px;
}

.success-modal[hidden] { display: none !important; }
.success-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: grid;
    place-items: center;
    padding: 20px;
}
.success-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(2, 10, 30, .62);
}
.success-modal__dialog {
    position: relative;
    z-index: 1;
    width: min(420px, 100%);
    padding: 32px 28px 28px;
    border-radius: 18px;
    background: #fff;
    text-align: center;
    box-shadow: 0 24px 60px rgba(0,0,0,.28);
}
.success-modal__close {
    position: absolute;
    top: 10px;
    right: 12px;
    border: 0;
    background: transparent;
    color: #7a8699;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
}
.success-modal__icon {
    width: 68px;
    height: 68px;
    margin: 0 auto 14px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: #0f9f63;
    background: #e5f8ef;
    font-size: 34px;
}
.success-modal__dialog h3 {
    margin: 0 0 10px;
    font-size: 24px;
    color: var(--ink);
}
.success-modal__dialog p {
    margin: 0 0 22px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.55;
}

@media (max-width: 1100px) {
    .feature-grid,
    .audience-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .package-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .package-card:nth-child(n+5) { display: flex; }
    .show-packages { display: none; }
}

@media (max-width: 860px) {
    html { scroll-padding-top: 66px; }
    .shell { width: min(100% - 28px, var(--shell)); }
    .site-header { height: 66px; }
    .brand { width: 120px; }
    .menu-toggle { display: inline-flex; order: 3; }
    .header-cta {
        margin-left: auto;
        min-height: 36px;
        padding: 0 12px;
        font-size: 11px;
    }
    .main-nav {
        position: absolute;
        inset: 66px 0 auto;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 10px 18px 18px;
        border-top: 1px solid rgba(255,255,255,.1);
        background: #010d2e;
    }
    .main-nav.open { display: flex; }
    .main-nav a {
        padding: 12px 4px;
        border-bottom: 1px solid rgba(255,255,255,.08);
        font-size: 14px;
    }

    .hero-inner {
        min-height: auto;
        grid-template-columns: 1fr;
        gap: 14px;
        padding: 96px 0 36px;
        text-align: left;
    }
    .hero h1 {
        max-width: none;
        font-size: clamp(36px, 10vw, 48px);
    }
    .hero-lead {
        font-size: 14px;
        max-width: none;
    }
    .hero-lead-line {
        white-space: normal;
        display: inline;
    }
    .hero-tags span { font-size: 13px; }
    .hero-visual {
        order: 2;
        min-height: 300px;
        margin-top: 4px;
    }
    .hero-copy { order: 1; position: relative; z-index: 3; }
    .five-g-mark {
        top: 0;
        left: 50%;
        font-size: 84px;
        opacity: .9;
        transform: translateX(-30%) skew(-6deg);
    }
    .device-stage { width: min(82%, 340px); margin-top: 36px; }
    .signal-one,
    .signal-two { opacity: .4; }

    .section,
    .tight-section { padding: 48px 0; }
    .pain-section {
        margin-top: 0;
        padding-top: 36px;
        border-radius: 0;
    }
    .pain-grid,
    .steps,
    .testimonial-grid,
    .package-notes,
    .consult-grid,
    .footer-grid { grid-template-columns: 1fr; }
    .feature-grid,
    .audience-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .pain-card p,
    .pain-card strong { font-size: 16px; }
    .feature-grid h3,
    .audience-grid h3 { font-size: 16px; }
    .feature-grid p,
    .audience-grid p,
    .steps p,
    .package-notes p { font-size: 14px; }

    .comparison {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .compare-side {
        min-height: auto;
        grid-template-rows: auto 1fr;
        padding: 32px 24px;
    }
    .compare-side ul {
        grid-template-rows: none;
        gap: 0;
    }
    .compare-side li {
        min-height: 44px;
        font-size: 15px;
    }
    /* Mobile: VS nằm giữa 2 khối, không absolute đẩy ra ngoài */
    .versus {
        position: relative;
        top: auto;
        left: auto;
        bottom: auto;
        width: 56px;
        height: 56px;
        margin: -18px auto;
        font-size: 18px;
        transform: none;
        order: 0;
        z-index: 3;
    }
    .compare-wifi { order: 1; }
    .versus { order: 2; }
    .compare-fiber {
        order: 3;
        padding-top: 28px;
    }

    .package-grid { grid-template-columns: 1fr; }
    .package-card { min-height: 0; }
    .filters { justify-content: flex-start; }
    .registration-steps { margin-bottom: 40px; }
    .consult-grid { gap: 28px; }
    .consult-form {
        grid-template-columns: 1fr;
        padding: 20px;
    }
    .field-full { grid-column: auto; }
    .floating-call,
    .floating-zalo,
    .floating-fb {
        width: 50px;
        height: 50px;
        right: 14px;
    }
    .floating-call { bottom: 16px; }
    .floating-zalo { bottom: 74px; }
    .floating-fb { bottom: 132px; font-size: 20px; }
}

@media (max-width: 480px) {
    .header-cta { display: none; }
    .hero-tags span { font-size: 12px; white-space: normal; }
    .feature-grid,
    .audience-grid { grid-template-columns: 1fr; }
    .audience-grid article { min-height: 0; }
    .hero-inner { padding-bottom: 28px; }
    .five-g-mark { font-size: 72px; top: -2%; transform: translateX(-28%) skew(-6deg); }
    .device-stage { width: min(88%, 300px); margin-top: 28px; }
}

/* Desktop: ép hero lead 1 dòng */
@media (min-width: 980px) {
    .hero-lead-line {
        white-space: nowrap;
        font-size: 15.5px;
        letter-spacing: -.01em;
    }
}
@media (min-width: 1200px) {
    .hero-lead-line { font-size: 17px; }
}