*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

:root {
	--primary: #1a6cf5;
	--primary-dark: #1250c4;
	--primary-light: #e8f0fe;
	--accent: #ff6b35;
	--success: #10b981;
	--bg: #f4f7fe;
	--white: #ffffff;
	--text: #1a1a2e;
	--text-muted: #6b7280;
	--border: #e5e7eb;
	--shadow: 0 4px 24px rgba(26, 108, 245, 0.12);
	--shadow-hover: 0 8px 40px rgba(26, 108, 245, 0.18);
	--radius: 14px;
	--radius-sm: 8px;
}

html {
	scroll-behavior: smooth;
}

body {
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
	background: var(--bg);
	color: var(--text);
	line-height: 1.7;
	-webkit-font-smoothing: antialiased;
}

/* ===== SKIP LINK (Accessibility / SEO) ===== */
.skip-link {
	position: absolute;
	top: -100px;
	left: 16px;
	background: var(--primary);
	color: #fff;
	padding: 8px 16px;
	border-radius: 0 0 8px 8px;
	font-size: 14px;
	z-index: 9999;
	text-decoration: none;
	transition: top 0.2s;
}

.skip-link:focus {
	top: 0;
}

/* ===== HEADER ===== */
header {
	background: var(--white);
	border-bottom: 1px solid var(--border);
	position: sticky;
	top: 0;
	z-index: 100;
	box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.header-inner {
	max-width: 1100px;
	margin: 0 auto;
	padding: 0 24px;
	height: 64px;
	display: flex;
	align-items: center;
	justify-content: space-between;
}

.logo {
	display: flex;
	align-items: center;
	gap: 10px;
	text-decoration: none;
}

.logo-icon {
	width: 40px;
	height: 40px;
	background: linear-gradient(135deg, var(--primary), #6a3de8);
	border-radius: 10px;
	display: flex;
	align-items: center;
	justify-content: center;
	color: #fff;
	font-weight: 800;
	font-size: 18px;
	letter-spacing: -1px;
	flex-shrink: 0;
}

.logo-text {
	font-size: 20px;
	font-weight: 700;
	color: var(--text);
}

nav {
	display: flex;
	gap: 28px;
}

nav a {
	text-decoration: none;
	color: var(--text-muted);
	font-size: 15px;
	font-weight: 500;
	transition: color 0.2s;
	padding: 4px 0;
	position: relative;
}

nav a::after {
	content: "";
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	height: 2px;
	background: var(--primary);
	transform: scaleX(0);
	transition: transform 0.2s;
	border-radius: 2px;
}

nav a:hover {
	color: var(--primary);
}

nav a:hover::after {
	transform: scaleX(1);
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
	background: var(--white);
	border-bottom: 1px solid var(--border);
	padding: 10px 24px;
}

.breadcrumb-inner {
	max-width: 1100px;
	margin: 0 auto;
	font-size: 13px;
	color: var(--text-muted);
}

.breadcrumb-inner a {
	color: var(--primary);
	text-decoration: none;
}

.breadcrumb-inner a:hover {
	text-decoration: underline;
}

.breadcrumb-sep {
	margin: 0 8px;
}

/* ===== HERO ===== */
.hero {
	background: linear-gradient(135deg, #1a6cf5 0%, #6a3de8 100%);
	color: #fff;
	padding: 72px 24px 80px;
	text-align: center;
	position: relative;
	overflow: hidden;
}

.hero::before {
	content: "";
	position: absolute;
	inset: 0;
	background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
	pointer-events: none;
}

.hero-inner {
	position: relative;
	max-width: 720px;
	margin: 0 auto;
}

.hero-badge {
	display: inline-block;
	background: rgba(255, 255, 255, 0.18);
	border: 1px solid rgba(255, 255, 255, 0.35);
	border-radius: 50px;
	padding: 6px 18px;
	font-size: 13px;
	font-weight: 600;
	margin-bottom: 20px;
	letter-spacing: 0.5px;
}

.hero h1 {
	font-size: clamp(30px, 5vw, 50px);
	font-weight: 800;
	line-height: 1.2;
	margin-bottom: 18px;
	text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.hero-desc {
	font-size: 17px;
	opacity: 0.92;
	margin-bottom: 36px;
	max-width: 580px;
	margin-left: auto;
	margin-right: auto;
}

.hero-btns {
	display: flex;
	gap: 14px;
	justify-content: center;
	flex-wrap: wrap;
	margin-bottom: 0;
}

.btn {
	display: inline-flex;
	align-items: center;
	gap: 9px;
	padding: 14px 30px;
	border-radius: 50px;
	font-size: 16px;
	font-weight: 700;
	text-decoration: none;
	transition: transform 0.2s, box-shadow 0.2s;
	cursor: pointer;
	border: none;
	white-space: nowrap;
}

.btn:hover {
	transform: translateY(-2px);
}

.btn-white {
	background: #fff;
	color: var(--primary);
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.btn-white:hover {
	box-shadow: 0 8px 30px rgba(0, 0, 0, 0.22);
}

.btn-outline {
	background: transparent;
	color: #fff;
	border: 2px solid rgba(255, 255, 255, 0.65);
}

.btn-outline:hover {
	background: rgba(255, 255, 255, 0.12);
	border-color: #fff;
}

.hero-stats {
	margin-top: 52px;
	display: flex;
	justify-content: center;
	gap: 40px;
	flex-wrap: wrap;
}

.stat {
	text-align: center;
}

.stat-num {
	font-size: 26px;
	font-weight: 800;
}

.stat-label {
	font-size: 12px;
	opacity: 0.75;
	margin-top: 3px;
	letter-spacing: 0.3px;
}

/* ===== TRUST BAR ===== */
.trust-bar {
	background: var(--white);
	border-bottom: 1px solid var(--border);
	padding: 14px 24px;
}

.trust-inner {
	max-width: 1100px;
	margin: 0 auto;
	display: flex;
	justify-content: center;
	gap: 32px;
	flex-wrap: wrap;
	align-items: center;
}

.trust-item {
	display: flex;
	align-items: center;
	gap: 7px;
	font-size: 13px;
	color: var(--text-muted);
	font-weight: 500;
}

.trust-item .t-icon {
	font-size: 16px;
}

.trust-item strong {
	color: var(--text);
}

/* ===== SECTION ===== */
section {
	padding: 68px 24px;
}

.section-inner {
	max-width: 1100px;
	margin: 0 auto;
}

.section-title {
	text-align: center;
	font-size: clamp(22px, 3.5vw, 34px);
	font-weight: 800;
	margin-bottom: 10px;
}

.section-sub {
	text-align: center;
	color: var(--text-muted);
	font-size: 15px;
	margin-bottom: 48px;
}

/* ===== DOWNLOAD CARDS ===== */
.download-section {
	background: var(--white);
}

.download-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
	gap: 22px;
}

.download-card {
	background: var(--bg);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 34px 26px;
	text-align: center;
	transition: transform 0.22s, box-shadow 0.22s;
	position: relative;
}

.download-card:hover {
	transform: translateY(-5px);
	box-shadow: var(--shadow-hover);
}

.download-card.featured {
	background: linear-gradient(135deg, var(--primary), #6a3de8);
	color: #fff;
	border-color: transparent;
}

.card-badge {
	position: absolute;
	top: 16px;
	right: 16px;
	background: var(--accent);
	color: #fff;
	font-size: 11px;
	font-weight: 700;
	padding: 3px 10px;
	border-radius: 20px;
	letter-spacing: 0.3px;
}

.card-icon {
	width: 66px;
	height: 66px;
	margin: 0 auto 18px;
	border-radius: 18px;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 32px;
}

.download-card:not(.featured) .card-icon {
	background: var(--primary-light);
}

.download-card.featured .card-icon {
	background: rgba(255, 255, 255, 0.2);
}

.card-title {
	font-size: 20px;
	font-weight: 700;
	margin-bottom: 8px;
}

.card-desc {
	font-size: 14px;
	margin-bottom: 8px;
	line-height: 1.6;
}

.download-card:not(.featured) .card-desc {
	color: var(--text-muted);
}

.download-card.featured .card-desc {
	opacity: 0.85;
}

.card-meta {
	font-size: 12px;
	margin-bottom: 22px;
	display: flex;
	justify-content: center;
	gap: 12px;
	flex-wrap: wrap;
}

.card-meta span {
	padding: 3px 10px;
	border-radius: 20px;
	font-weight: 600;
}

.download-card:not(.featured) .card-meta span {
	background: var(--primary-light);
	color: var(--primary);
}

.download-card.featured .card-meta span {
	background: rgba(255, 255, 255, 0.22);
	color: #fff;
}

.btn-download {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 13px 28px;
	border-radius: 50px;
	font-size: 15px;
	font-weight: 700;
	text-decoration: none;
	transition: transform 0.2s, box-shadow 0.2s;
}

.btn-download:hover {
	transform: translateY(-2px);
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.download-card:not(.featured) .btn-download {
	background: var(--primary);
	color: #fff;
}

.download-card.featured .btn-download {
	background: #fff;
	color: var(--primary);
}

.card-note {
	margin-top: 12px;
	font-size: 12px;
	opacity: 0.65;
}

/* ===== FEATURES ===== */
.features-section {
	background: var(--bg);
}

.features-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
	gap: 22px;
}

.feature-card {
	background: var(--white);
	border-radius: var(--radius);
	padding: 26px 22px;
	border: 1px solid var(--border);
	transition: box-shadow 0.22s, transform 0.22s;
}

.feature-card:hover {
	box-shadow: var(--shadow);
	transform: translateY(-3px);
}

.feature-icon {
	font-size: 34px;
	margin-bottom: 14px;
	display: block;
}

.feature-title {
	font-size: 16px;
	font-weight: 700;
	margin-bottom: 7px;
}

.feature-desc {
	font-size: 14px;
	color: var(--text-muted);
	line-height: 1.65;
}

/* ===== HOW TO INSTALL ===== */
.install-section {
	background: var(--white);
}

.steps {
	display: flex;
	flex-direction: column;
	max-width: 700px;
	margin: 0 auto;
}

.step {
	display: flex;
	gap: 20px;
	padding: 26px 0;
	border-bottom: 1px dashed var(--border);
}

.step:last-child {
	border-bottom: none;
}

.step-num {
	flex-shrink: 0;
	width: 44px;
	height: 44px;
	background: linear-gradient(135deg, var(--primary), #6a3de8);
	color: #fff;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 18px;
	font-weight: 800;
}

.step-content h3 {
	font-size: 17px;
	font-weight: 700;
	margin-bottom: 6px;
}

.step-content p {
	font-size: 14px;
	color: var(--text-muted);
	line-height: 1.7;
}

/* ===== REVIEWS ===== */
.reviews-section {
	background: var(--bg);
}

.reviews-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
	gap: 20px;
}

.review-card {
	background: var(--white);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 22px 20px;
}

.review-stars {
	font-size: 15px;
	color: #f59e0b;
	margin-bottom: 10px;
}

.review-text {
	font-size: 14px;
	color: #374151;
	line-height: 1.75;
	margin-bottom: 14px;
}

.review-author {
	display: flex;
	align-items: center;
	gap: 10px;
}

.review-avatar {
	width: 36px;
	height: 36px;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 16px;
	font-weight: 700;
	color: #fff;
	flex-shrink: 0;
}

.review-name {
	font-size: 14px;
	font-weight: 600;
}

.review-platform {
	font-size: 12px;
	color: var(--text-muted);
}

/* ===== FAQ ===== */
.faq-section {
	background: var(--white);
}

.faq-list {
	max-width: 780px;
	margin: 0 auto;
	display: flex;
	flex-direction: column;
	gap: 14px;
}

.faq-item {
	background: var(--bg);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	overflow: hidden;
}

.faq-question {
	width: 100%;
	background: none;
	border: none;
	padding: 18px 22px;
	text-align: left;
	font-size: 15px;
	font-weight: 600;
	color: var(--text);
	cursor: pointer;
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 12px;
	transition: color 0.2s;
}

.faq-question:hover {
	color: var(--primary);
}

.faq-icon {
	flex-shrink: 0;
	width: 24px;
	height: 24px;
	background: var(--primary-light);
	color: var(--primary);
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 16px;
	font-weight: 700;
	transition: transform 0.3s, background 0.2s;
}

.faq-item.open .faq-icon {
	transform: rotate(45deg);
	background: var(--primary);
	color: #fff;
}

.faq-answer {
	max-height: 0;
	overflow: hidden;
	transition: max-height 0.35s ease, padding 0.3s;
	font-size: 14px;
	color: var(--text-muted);
	line-height: 1.8;
}

.faq-item.open .faq-answer {
	max-height: 200px;
	padding: 0 22px 18px;
}

/* ===== SEO ARTICLE ===== */
.article-section {
	background: var(--bg);
}

.article-body {
	max-width: 800px;
	margin: 0 auto;
	font-size: 15px;
	color: #374151;
	line-height: 1.9;
}

.article-body h2 {
	font-size: 21px;
	font-weight: 700;
	color: var(--text);
	margin: 36px 0 12px;
	padding-bottom: 8px;
	border-bottom: 2px solid var(--primary-light);
}

.article-body h3 {
	font-size: 17px;
	font-weight: 600;
	color: var(--text);
	margin: 24px 0 8px;
}

.article-body p {
	margin-bottom: 14px;
}

.article-body ul {
	margin: 0 0 14px 20px;
}

.article-body li {
	margin-bottom: 7px;
}

.article-body strong {
	color: var(--primary);
}

.article-body a {
	color: var(--primary);
	text-decoration: none;
}

.article-body a:hover {
	text-decoration: underline;
}

.info-table {
	width: 100%;
	border-collapse: collapse;
	margin: 16px 0 24px;
	font-size: 14px;
}

.info-table th,
.info-table td {
	padding: 10px 14px;
	text-align: left;
	border: 1px solid var(--border);
}

.info-table th {
	background: var(--primary-light);
	color: var(--primary);
	font-weight: 700;
}

.info-table tr:nth-child(even) td {
	background: #fafbfc;
}

/* ===== CTA ===== */
.cta-section {
	background: linear-gradient(135deg, #1a6cf5, #6a3de8);
	color: #fff;
	text-align: center;
	padding: 68px 24px;
}

.cta-section h2 {
	font-size: 30px;
	font-weight: 800;
	margin-bottom: 12px;
}

.cta-section p {
	font-size: 16px;
	opacity: 0.88;
	margin-bottom: 34px;
	max-width: 560px;
	margin-left: auto;
	margin-right: auto;
}

.cta-btns {
	display: flex;
	gap: 14px;
	justify-content: center;
	flex-wrap: wrap;
}

/* ===== FOOTER ===== */
footer {
	background: #0f172a;
	color: rgba(255, 255, 255, 0.5);
	padding: 36px 24px;
	text-align: center;
	font-size: 13px;
}

.footer-links {
	margin-bottom: 12px;
	display: flex;
	justify-content: center;
	flex-wrap: wrap;
	gap: 4px;
}

footer a {
	color: rgba(255, 255, 255, 0.65);
	text-decoration: none;
	padding: 4px 10px;
}

footer a:hover {
	color: #fff;
}

.footer-copy {
	margin-top: 8px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
	nav {
		display: none;
	}

	.trust-inner {
		gap: 16px;
	}
}

@media (max-width: 480px) {
	.hero {
		padding: 52px 20px 60px;
	}

	.hero-stats {
		gap: 20px;
	}

	section {
		padding: 48px 16px;
	}

	.step {
		gap: 14px;
	}
}