:root {
--dh-bg: #050608;
--dh-bg-alt: #111319;
--dh-surface: #181b23;
--dh-surface-soft: #1f2330;
--dh-primary: #ff8a00;
--dh-primary-soft: #ffb347;
--dh-primary-gradient: linear-gradient(135deg, #ffb347, #ff8a00);
--dh-text: #f5f5f7;
--dh-text-soft: #c1c3cc;
--dh-text-muted: #8b8fa0;
--dh-border: #262a35;
--dh-danger: #ff4b4b;
--dh-radius-lg: 18px;
--dh-radius-md: 12px;
--dh-radius-pill: 999px;
--dh-shadow-soft: 0 24px 80px rgba(0, 0, 0, 0.65);
--dh-shadow-subtle: 0 14px 40px rgba(0, 0, 0, 0.55);
--dh-transition-fast: 0.18s ease-out;
--dh-transition: 0.22s ease-out;
--dh-container-width: 1120px;
--dh-header-height: 80px;
}
*,
*::before,
*::after {
box-sizing: border-box;
}
body {
margin: 0;
font-family: Poppins, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
background:
radial-gradient(circle at top left, #1f2433, transparent 55%),
radial-gradient(circle at bottom right, #050608, #020308 70%);
background-color: var(--dh-bg);
color: var(--dh-text);
-webkit-font-smoothing: antialiased;
text-rendering: optimizeLegibility;
}
img {
max-width: 100%;
display: block;
}
a {
color: inherit;
text-decoration: none;
}
.dh-container {
width: 100%;
max-width: var(--dh-container-width);
margin: 0 auto;
padding: 0 20px;
}
.dh-header {
position: fixed;
top: 0;
left: 0;
right: 0;
z-index: 40;
backdrop-filter: blur(18px);
background: radial-gradient(circle at top left, rgba(255, 138, 0, 0.08), rgba(5, 6, 8, 0.96));
border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.dh-header-inner {
display: flex;
align-items: center;
justify-content: space-between;
height: var(--dh-header-height);
gap: 24px;
}
.dh-logo-wrap {
display: inline-flex;
align-items: center;
gap: 10px;
padding: 4px 10px 4px 4px;
border-radius: 999px;
background: rgba(12, 14, 20, 0.8);
border: 1px solid rgba(255, 255, 255, 0.04);
transition: transform var(--dh-transition-fast), box-shadow var(--dh-transition-fast), border-color var(--dh-transition-fast), background var(--dh-transition-fast);
}
.dh-logo-wrap:hover {
transform: translateY(-1px);
box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
border-color: rgba(255, 138, 0, 0.6);
background: rgba(12, 14, 20, 0.98);
}
.dh-logo {
width: 42px;
height: 42px;
border-radius: 999px;
background: radial-gradient(circle at 30% 0%, #ffb347, #ff8a00 55%, #ff6a00 100%);
object-fit: cover;
}
.dh-logo-text {
font-weight: 600;
font-size: 15px;
letter-spacing: 0.08em;
text-transform: uppercase;
color: var(--dh-text);
}
.dh-nav {
display: flex;
align-items: center;
gap: 22px;
font-size: 14px;
color: var(--dh-text-muted);
}
.dh-nav a {
position: relative;
padding: 4px 0;
transition: color var(--dh-transition-fast), opacity var(--dh-transition-fast);
}
.dh-nav a::after {
content: "";
position: absolute;
left: 0;
right: 0;
bottom: -6px;
height: 2px;
border-radius: 999px;
background: var(--dh-primary-gradient);
transform: scaleX(0);
transform-origin: center;
transition: transform var(--dh-transition);
}
.dh-nav a:hover {
color: var(--dh-text);
}
.dh-nav a:hover::after {
transform: scaleX(1);
}
.dh-nav-toggle {
display: none;
flex-direction: column;
justify-content: center;
align-items: center;
gap: 5px;
width: 40px;
height: 40px;
border-radius: 999px;
border: 1px solid rgba(255, 255, 255, 0.08);
background: rgba(12, 14, 20, 0.9);
cursor: pointer;
padding: 0;
}
.dh-nav-toggle span {
width: 18px;
height: 2px;
border-radius: 999px;
background: #fdfdfd;
transition: transform var(--dh-transition-fast), opacity var(--dh-transition-fast);
}
.dh-nav-toggle-open span:nth-child(1) {
transform: translateY(3px) rotate(45deg);
}
.dh-nav-toggle-open span:nth-child(2) {
opacity: 0;
}
.dh-nav-toggle-open span:nth-child(3) {
transform: translateY(-3px) rotate(-45deg);
}
.dh-btn {
display: inline-flex;
align-items: center;
justify-content: center;
gap: 8px;
padding: 10px 20px;
border-radius: var(--dh-radius-pill);
font-size: 14px;
font-weight: 500;
border: none;
cursor: pointer;
transition: background var(--dh-transition), color var(--dh-transition), box-shadow var(--dh-transition), transform var(--dh-transition-fast), border-color var(--dh-transition);
white-space: nowrap;
}
.dh-btn-primary {
background-image: var(--dh-primary-gradient);
color: #070707;
box-shadow: 0 18px 45px rgba(255, 138, 0, 0.45);
}
.dh-btn-primary:hover {
transform: translateY(-1px);
box-shadow: 0 24px 60px rgba(255, 138, 0, 0.6);
}
.dh-btn-secondary {
background: rgba(24, 27, 35, 0.95);
color: var(--dh-text);
border: 1px solid rgba(255, 255, 255, 0.08);
}
.dh-btn-secondary:hover {
background: rgba(31, 35, 48, 1);
border-color: rgba(255, 255, 255, 0.18);
}
.dh-btn-outline {
background: transparent;
border: 1px solid rgba(255, 255, 255, 0.16);
color: var(--dh-text-soft);
}
.dh-btn-outline:hover {
border-color: rgba(255, 138, 0, 0.8);
color: var(--dh-text);
background: rgba(10, 12, 18, 0.9);
}
.dh-btn-ghost {
background: transparent;
border: 1px solid rgba(255, 255, 255, 0.08);
color: var(--dh-text-soft);
}
.dh-btn-ghost:hover {
background: rgba(24, 27, 35, 0.9);
color: var(--dh-text);
border-color: rgba(255, 138, 0, 0.6);
}
.dh-btn-full {
width: 100%;
}
.dh-header-cta {
margin-left: auto;
}
.dh-hero {
padding-top: calc(var(--dh-header-height) + 40px);
padding-bottom: 80px;
}
.dh-hero-grid {
display: grid;
grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
gap: 40px;
align-items: center;
}
.dh-pill {
display: inline-flex;
align-items: center;
gap: 8px;
padding: 6px 14px;
border-radius: var(--dh-radius-pill);
font-size: 12px;
letter-spacing: 0.12em;
text-transform: uppercase;
background: rgba(24, 27, 35, 0.95);
color: var(--dh-text-soft);
border: 1px solid rgba(255, 255, 255, 0.08);
margin-bottom: 16px;
}
.dh-pill::before {
content: "";
width: 8px;
height: 8px;
border-radius: 999px;
background-image: var(--dh-primary-gradient);
box-shadow: 0 0 16px rgba(255, 138, 0, 0.7);
}
.dh-hero h1 {
font-size: 40px;
line-height: 1.2;
margin: 0 0 16px;
letter-spacing: -0.03em;
}
.dh-hero-subtitle {
font-size: 15px;
line-height: 1.7;
color: var(--dh-text-soft);
max-width: 520px;
margin: 0 0 24px;
}
.dh-hero-actions {
display: flex;
flex-wrap: wrap;
gap: 12px;
margin-bottom: 28px;
}
.dh-metrics {
display: flex;
flex-wrap: wrap;
gap: 16px;
}
.dh-metric {
flex: 1 1 120px;
min-width: 0;
padding: 10px 14px;
border-radius: var(--dh-radius-md);
background: rgba(24, 27, 35, 0.9);
border: 1px solid rgba(255, 255, 255, 0.04);
}
.dh-metric-number {
display: block;
font-size: 13px;
font-weight: 600;
color: var(--dh-primary-soft);
text-transform: uppercase;
letter-spacing: 0.12em;
margin-bottom: 4px;
}
.dh-metric-label {
font-size: 13px;
color: var(--dh-text-soft);
}
.dh-hero-card {
background: radial-gradient(circle at top left, #1f2433, #050608 80%);
border-radius: 32px;
box-shadow: var(--dh-shadow-soft);
border: 1px solid rgba(255, 255, 255, 0.06);
overflow: hidden;
position: relative;
animation: dh-float 9s ease-in-out infinite;
}
.dh-hero-logo-bg {
padding: 26px 26px 0;
background: radial-gradient(circle at 10% 0%, rgba(255, 180, 71, 0.16), transparent 60%);
}
.dh-hero-logo {
width: 74px;
height: 74px;
border-radius: 999px;
background: radial-gradient(circle at 30% 0%, #ffb347, #ff8a00 55%, #ff6a00 100%);
object-fit: cover;
border: 2px solid rgba(255, 255, 255, 0.2);
box-shadow: 0 18px 60px rgba(0, 0, 0, 0.85);
}
.dh-hero-card-body {
padding: 22px 24px 24px;
}
.dh-hero-card-body h2 {
font-size: 20px;
margin: 0 0 8px;
}
.dh-hero-card-body p {
margin: 0 0 16px;
font-size: 14px;
color: var(--dh-text-soft);
}
.dh-hero-list {
list-style: none;
padding: 0;
margin: 0 0 14px;
font-size: 13px;
color: var(--dh-text-soft);
}
.dh-hero-list li {
display: flex;
align-items: center;
gap: 8px;
margin-bottom: 6px;
}
.dh-hero-list li::before {
content: "";
width: 6px;
height: 6px;
border-radius: 999px;
background-image: var(--dh-primary-gradient);
box-shadow: 0 0 10px rgba(255, 138, 0, 0.8);
}
.dh-link-arrow {
display: inline-flex;
align-items: center;
gap: 6px;
font-size: 13px;
color: var(--dh-primary-soft);
position: relative;
}
.dh-link-arrow::after {
content: "↗";
font-size: 12px;
transition: transform var(--dh-transition-fast);
}
.dh-link-arrow:hover::after {
transform: translateY(-1px) translateX(1px);
}
.dh-section {
padding: 60px 0;
}
.dh-section-alt {
background: radial-gradient(circle at top right, #1a1d29, #050608 60%);
}
.dh-section-header,
.dh-section-header-left {
max-width: 640px;
margin-bottom: 26px;
}
.dh-section-header {
text-align: center;
margin-left: auto;
margin-right: auto;
}
.dh-section h2 {
font-size: 26px;
margin: 0 0 10px;
letter-spacing: -0.02em;
}
.dh-section-header p,
.dh-section-header-left p {
margin: 0;
font-size: 14px;
color: var(--dh-text-soft);
}
.dh-grid-3 {
display: grid;
grid-template-columns: repeat(3, minmax(0, 1fr));
gap: 22px;
}
.dh-grid-3 > * {
min-width: 0;
}
.dh-card {
background: rgba(24, 27, 35, 0.96);
border-radius: var(--dh-radius-lg);
padding: 20px 18px;
border: 1px solid rgba(255, 255, 255, 0.06);
box-shadow: var(--dh-shadow-subtle);
}
.dh-card h3 {
margin: 0 0 8px;
font-size: 17px;
}
.dh-card p {
margin: 0;
font-size: 14px;
color: var(--dh-text-soft);
}
.dh-course-card {
background: rgba(18, 21, 29, 0.98);
border-radius: 22px;
padding: 42px 18px 18px;
border: 1px solid rgba(255, 255, 255, 0.06);
display: flex;
flex-direction: column;
gap: 10px;
box-shadow: var(--dh-shadow-subtle);
position: relative;
overflow: hidden;
}
.dh-course-card-highlight {
border-color: rgba(255, 138, 0, 0.7);
box-shadow: 0 22px 70px rgba(255, 138, 0, 0.35);
background: radial-gradient(circle at top, rgba(255, 180, 71, 0.16), rgba(18, 21, 29, 0.98));
}
.dh-course-card h3 {
margin: 0;
font-size: 18px;
}
.dh-course-card p {
margin: 0;
font-size: 14px;
color: var(--dh-text-soft);
}
.dh-course-card ul {
list-style: none;
padding: 0;
margin: 0 0 10px;
font-size: 13px;
color: var(--dh-text-soft);
}
.dh-course-card ul li {
margin-bottom: 4px;
}
.dh-course-card .dh-btn {
margin-top: auto;
}
.dh-tag {
position: absolute;
top: 16px;
right: 16px;
padding: 4px 10px;
border-radius: var(--dh-radius-pill);
font-size: 11px;
text-transform: uppercase;
letter-spacing: 0.12em;
background: rgba(24, 27, 35, 0.9);
color: var(--dh-text-soft);
border: 1px solid rgba(255, 255, 255, 0.08);
}
.dh-tag-hot {
background-image: var(--dh-primary-gradient);
color: #050608;
border: none;
}
.dh-section-footnote {
margin-top: 16px;
font-size: 12px;
color: var(--dh-text-muted);
text-align: center;
}
.dh-support-grid {
display: grid;
grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
gap: 32px;
align-items: flex-start;
}
.dh-support-channels {
display: grid;
grid-template-columns: repeat(2, minmax(0, 1fr));
gap: 18px;
margin-top: 20px;
}
.dh-support-channel {
background: rgba(24, 27, 35, 0.95);
border-radius: var(--dh-radius-lg);
padding: 16px 14px 14px;
border: 1px solid rgba(255, 255, 255, 0.06);
}
.dh-support-channel h3 {
margin: 0 0 6px;
font-size: 15px;
}
.dh-support-channel p {
margin: 0 0 10px;
font-size: 13px;
color: var(--dh-text-soft);
}
.dh-support-form-wrap {
background: rgba(10, 12, 18, 0.96);
border-radius: 28px;
padding: 20px 18px 18px;
border: 1px solid rgba(255, 255, 255, 0.08);
box-shadow: var(--dh-shadow-soft);
}
.dh-support-form-wrap h3 {
margin: 0 0 8px;
font-size: 18px;
}
.dh-support-form-wrap p {
margin: 0 0 14px;
font-size: 13px;
color: var(--dh-text-soft);
}
.dh-form {
display: flex;
flex-direction: column;
gap: 12px;
}
.dh-form-row {
display: flex;
flex-direction: column;
gap: 6px;
}
.dh-form-row label {
font-size: 13px;
color: var(--dh-text-soft);
}
.dh-form-row input,
.dh-form-row textarea {
padding: 10px 11px;
border-radius: 10px;
border: 1px solid var(--dh-border);
background: rgba(8, 10, 15, 0.96);
color: var(--dh-text);
font-family: inherit;
font-size: 13px;
transition: border-color var(--dh-transition-fast), box-shadow var(--dh-transition-fast), background var(--dh-transition-fast);
resize: vertical;
}
.dh-form-row input::placeholder,
.dh-form-row textarea::placeholder {
color: var(--dh-text-muted);
}
.dh-form-row input:focus,
.dh-form-row textarea:focus {
outline: none;
border-color: rgba(255, 138, 0, 0.8);
box-shadow: 0 0 0 1px rgba(255, 138, 0, 0.5);
background: rgba(8, 10, 15, 1);
}
.dh-form-note {
margin: 8px 0 0;
font-size: 11px;
color: var(--dh-text-muted);
}
.dh-form-status {
margin-top: 6px;
font-size: 11px;
}
.dh-form-status-sending {
color: var(--dh-text-soft);
}
.dh-form-status-success {
color: #4caf50;
}
.dh-form-status-error {
color: var(--dh-danger);
}
.dh-about-grid {
display: grid;
grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
gap: 30px;
align-items: center;
}
.dh-about-grid p {
font-size: 14px;
color: var(--dh-text-soft);
line-height: 1.7;
}
.dh-about-grid p + p {
margin-top: 10px;
}
.dh-about-highlights {
display: flex;
flex-direction: column;
gap: 12px;
}
.dh-about-pill {
display: flex;
align-items: center;
gap: 12px;
padding: 10px 12px;
border-radius: 999px;
background: rgba(24, 27, 35, 0.96);
border: 1px solid rgba(255, 255, 255, 0.06);
}
.dh-about-pill span {
padding: 4px 10px;
border-radius: 999px;
background-image: var(--dh-primary-gradient);
color: #050608;
font-size: 12px;
font-weight: 600;
letter-spacing: 0.08em;
text-transform: uppercase;
}
.dh-about-pill p {
margin: 0;
font-size: 13px;
color: var(--dh-text-soft);
}
.dh-result-card {
background: rgba(18, 21, 29, 0.98);
border-radius: 22px;
padding: 20px 18px 18px;
border: 1px solid rgba(255, 255, 255, 0.04);
box-shadow: var(--dh-shadow-subtle);
position: relative;
overflow: hidden;
display: flex;
flex-direction: column;
gap: 10px;
}
.dh-result-card::before {
content: "";
position: absolute;
inset: -1px;
border-radius: inherit;
background: radial-gradient(circle at top left, rgba(255, 180, 71, 0.32), transparent 60%);
opacity: 0;
transition: opacity var(--dh-transition-fast);
z-index: -1;
}
.dh-result-card:hover::before {
opacity: 1;
}
.dh-result-card h3 {
margin: 0 0 6px;
font-size: 17px;
}
.dh-result-card p {
margin: 0;
font-size: 14px;
color: var(--dh-text-soft);
}
.dh-result-card ul {
list-style: none;
padding: 0;
margin: 0;
font-size: 13px;
color: var(--dh-text-soft);
}
.dh-result-card ul li {
margin-bottom: 4px;
display: flex;
align-items: center;
gap: 8px;
}
.dh-result-card ul li::before {
content: "";
width: 5px;
height: 5px;
border-radius: 999px;
background: var(--dh-primary-soft);
}
.dh-result-card-highlight {
border-color: rgba(255, 138, 0, 0.7);
background: radial-gradient(circle at top right, rgba(255, 180, 71, 0.16), rgba(18, 21, 29, 0.98));
}
.dh-faq-list {
display: flex;
flex-direction: column;
gap: 12px;
max-width: 680px;
margin: 0 auto;
}
.dh-faq-item {
border-radius: var(--dh-radius-md);
background: rgba(24, 27, 35, 0.95);
border: 1px solid rgba(255, 255, 255, 0.06);
overflow: hidden;
}
.dh-faq-question {
width: 100%;
display: flex;
justify-content: space-between;
align-items: center;
padding: 16px 18px;
background: transparent;
border: none;
color: var(--dh-text);
font-size: 14px;
font-weight: 500;
cursor: pointer;
text-align: left;
}
.dh-faq-icon {
font-size: 18px;
color: var(--dh-primary-soft);
transition: transform var(--dh-transition);
}
.dh-faq-answer {
display: none;
padding: 0 18px 18px;
font-size: 13px;
color: var(--dh-text-soft);
line-height: 1.6;
border-top: 1px solid rgba(255, 255, 255, 0.04);
}
.dh-faq-item.is-open .dh-faq-answer {
display: block;
animation: dh-fade-in 0.2s ease-out;
}
.dh-faq-item.is-open .dh-faq-icon {
transform: rotate(45deg);
color: var(--dh-danger);
}
.dh-footer {
background: #020308;
border-top: 1px solid rgba(255, 255, 255, 0.06);
padding: 60px 0 0;
}
.dh-footer-inner {
display: flex;
justify-content: space-between;
flex-wrap: wrap;
gap: 40px;
padding-bottom: 40px;
}
.dh-footer-brand {
font-size: 18px;
font-weight: 600;
margin: 0 0 8px;
letter-spacing: -0.02em;
}
.dh-footer-text {
font-size: 13px;
color: var(--dh-text-soft);
margin: 0;
max-width: 280px;
line-height: 1.6;
}
.dh-footer-social {
margin-top: 8px;
display: flex;
flex-wrap: wrap;
gap: 10px;
font-size: 13px;
}
.dh-footer-links {
display: flex;
flex-direction: column;
gap: 10px;
}
.dh-footer-links a {
font-size: 13px;
color: var(--dh-text-soft);
transition: color var(--dh-transition-fast);
}
.dh-footer-links a:hover {
color: var(--dh-primary-soft);
}

@keyframes dh-float {
0%,
100% {
transform: translateY(0);
}
50% {
transform: translateY(-8px);
}
}
@keyframes dh-fade-in {
from {
opacity: 0;
transform: translateY(-4px);
}
to {
opacity: 1;
transform: translateY(0);
}
}
[data-reveal] {
opacity: 0;
transform: translateY(20px);
transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
[data-reveal].is-visible {
opacity: 1;
transform: translateY(0);
}
@media (max-width: 768px) {
:root {
--dh-header-height: 70px;
}
.dh-hero-grid,
.dh-grid-3,
.dh-support-grid,
.dh-about-grid {
grid-template-columns: 1fr;
}
.dh-hero h1 {
font-size: 32px;
}
.dh-header-inner {
padding-right: 16px;
}
.dh-nav,
.dh-header-cta {
display: none;
}
.dh-nav-toggle {
display: flex;
margin-left: auto;
}
.dh-nav-open {
display: flex;
flex-direction: column;
position: absolute;
top: var(--dh-header-height);
left: 0;
right: 0;
background: #050608;
padding: 20px;
border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.dh-support-channels {
grid-template-columns: 1fr;
}
}

.footer { 
display: flex;
flex-direction: column;
align-items: center;
gap: 6px;
padding: 10px 0 14px;
font-size: 0.85rem; 
color: #6b7280; 
text-align: center; 
} 

.footer-line {
white-space: nowrap;
}

.footer-line-rights {
font-size: 0.82rem;
opacity: 0.9;
}

.footer-line-credit {
opacity: 0.85;
}
 
.author { 
display: inline; 
margin-left: 4px; 
font-weight: 600; 
text-decoration: none; 
 
background: linear-gradient( 
90deg, 
#1e3a8a, 
#4c1d95 
); 
 
-webkit-background-clip: text; 
-webkit-text-fill-color: transparent; 
} 
 
.author:hover { 
opacity: 0.85; 
}

@media (max-width: 420px) {
.footer-line {
white-space: normal;
}
}