:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --secondary: #22d3ee;
    --accent: #8b5cf6;
    --danger: #ef4444;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --light: #f1f5f9;
    --muted: #a0aec0;
    --white: #ffffff;
    --border: rgba(14, 165, 233, 0.14);
    --border-strong: rgba(14, 165, 233, 0.42);
    --shadow: 0 0.25rem 1rem rgba(14, 165, 233, 0.15);
    --shadow-lg: 0 0.75rem 2rem rgba(14, 165, 233, 0.2);
    --gradient: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    --gradient-primary: linear-gradient(90deg, var(--primary), var(--secondary));
    --gradient-danger: linear-gradient(90deg, var(--danger), #f87171);
    --gradient-tertiary: linear-gradient(90deg, var(--accent), #a78bfa);
    --radius-sm: 0.45rem;
    --radius-md: 0.75rem;
    --radius-pill: 999rem;
    --header-height: 4.75rem;
    --content-gutter: clamp(1rem, 2.5vw, 2rem);
    --container-max: 90rem;
}

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

html {
    color-scheme: dark;
    font-size: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
    min-height: 100vh;
    margin: 0;
    padding-top: var(--header-height);
    overflow-x: hidden;
    color: var(--light);
    background-color: var(--dark);
    background-image:
        radial-gradient(rgba(14, 165, 233, 0.05) 1px, transparent 1px),
        radial-gradient(rgba(139, 92, 246, 0.05) 1px, transparent 1px);
    background-position: 0 0, 1.375rem 1.375rem;
    background-size: 2.75rem 2.75rem;
    font-family: Inter, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.7;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

html.menu-open,
body.menu-open {
    overflow: hidden;
    overscroll-behavior: none;
}

main,
section,
article,
nav,
header,
footer {
    min-width: 0;
}

main {
    display: block;
}

section {
    scroll-margin-top: calc(var(--header-height) + 1rem);
}

img,
svg,
video,
canvas,
iframe {
    max-width: 100%;
}

img,
video {
    height: auto;
}

button,
input,
select,
textarea {
    font: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6,
p,
figure,
blockquote,
dl,
dd {
    margin-top: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--light);
    line-height: 1.25;
    overflow-wrap: anywhere;
}

h1 {
    font-size: clamp(2rem, 1.45rem + 2.4vw, 3.5rem);
}

h2 {
    font-size: clamp(1.7rem, 1.35rem + 1.5vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 1.12rem + 0.55vw, 1.65rem);
}

p {
    margin-bottom: 1rem;
    color: var(--muted);
}

a {
    color: var(--primary);
    text-decoration: none;
    text-underline-offset: 0.18em;
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}

a:visited {
    color: var(--primary);
}

a:hover {
    color: var(--secondary);
}

a:focus-visible {
    border-radius: 0.2rem;
    outline: 0.1875rem solid rgba(34, 211, 238, 0.75);
    outline-offset: 0.1875rem;
}

a:active {
    color: var(--primary-dark);
}

a[aria-disabled="true"],
a.disabled,
.disabled > a,
button:disabled,
.btn:disabled,
.btn[aria-disabled="true"] {
    cursor: not-allowed;
    opacity: 0.5;
    pointer-events: none;
}

::selection {
    color: var(--white);
    background: rgba(14, 165, 233, 0.6);
}

.container,
.article-container {
    width: min(100%, var(--container-max));
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--content-gutter);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: fixed;
    top: 0.5rem;
    left: 0.75rem;
    z-index: 1200;
    padding: 0.65rem 1rem;
    border-radius: var(--radius-sm);
    color: var(--dark);
    background: var(--secondary);
    box-shadow: var(--shadow);
    transform: translateY(-160%);
}

.skip-link:focus-visible {
    color: var(--dark);
    transform: translateY(0);
}

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-accent { color: var(--accent); }
.text-danger { color: var(--danger); }

.btn {
    display: inline-flex;
    min-height: 2.85rem;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.72rem 1.35rem;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 700;
    line-height: 1.2;
    text-align: center;
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.btn:hover {
    transform: translateY(-0.125rem);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary,
.btn-primary:visited {
    color: var(--white);
    background: var(--gradient-primary);
    border-color: rgba(255, 255, 255, 0.12);
}

.btn-primary:hover {
    color: var(--white);
    background: linear-gradient(90deg, var(--primary-dark), var(--primary));
    box-shadow: var(--shadow);
}

.btn-secondary,
.btn-secondary:visited {
    color: var(--secondary);
    background: transparent;
    border-color: var(--secondary);
}

.btn-secondary:hover {
    color: var(--dark);
    background: var(--secondary);
}

.btn-tertiary,
.btn-tertiary:visited {
    color: #c4b5fd;
    background: transparent;
    border-color: var(--accent);
}

.btn-tertiary:hover {
    color: var(--white);
    background: var(--accent);
}

.card,
.news-article {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.98), rgba(15, 23, 42, 0.98));
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover,
.news-list .news-article:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-lg);
    transform: translateY(-0.2rem);
}

.section-tech-bg {
    position: relative;
    isolation: isolate;
}

.section-tech-bg::before {
    position: absolute;
    inset: 0;
    z-index: -1;
    content: "";
    background: var(--gradient);
    opacity: 0.08;
    pointer-events: none;
}

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    min-height: var(--header-height);
    border-bottom: 1px solid rgba(14, 165, 233, 0.12);
    background: rgba(15, 23, 42, 0.94);
    box-shadow: 0 0.4rem 1.2rem rgba(2, 8, 23, 0.32);
    backdrop-filter: blur(0.75rem);
    -webkit-backdrop-filter: blur(0.75rem);
}

.header-container {
    display: flex;
    min-height: var(--header-height);
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    min-width: 0;
    flex: 1 1 auto;
}

.logo a,
.footer-logo-link {
    display: inline-flex;
    max-width: 100%;
    align-items: center;
    gap: 0.55rem;
    color: var(--light);
    font-weight: 800;
}

.logo a:visited,
.footer-logo-link:visited {
    color: var(--light);
}

.logo a:hover,
.footer-logo-link:hover {
    color: var(--secondary);
}

.logo-icon {
    flex: 0 0 auto;
    font-size: 1.8rem;
    line-height: 1;
}

.logo-name {
    min-width: 0;
    overflow: hidden;
    font-size: clamp(1.15rem, 0.95rem + 0.75vw, 1.55rem);
    text-overflow: ellipsis;
    white-space: nowrap;
}

.menu-checkbox {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    opacity: 0;
    pointer-events: none;
}

.menu-toggle,
.menu-backdrop {
    display: none;
}

.main-nav {
    flex: 0 1 auto;
}

.nav-list,
.breadcrumb ol,
.friend-links,
.articles-grid,
.news-list,
.pagination ul,
ul.pagination,
ul.page {
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: clamp(0.35rem, 1vw, 1.15rem);
}

.nav-item {
    min-width: 0;
}

.nav-link {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    justify-content: center;
    padding: 0.55rem 0.7rem;
    border-radius: var(--radius-sm);
    color: var(--light);
    font-weight: 600;
    white-space: nowrap;
}

.nav-link:visited {
    color: var(--light);
}

.nav-link:hover {
    color: var(--secondary);
    background: rgba(14, 165, 233, 0.1);
}

.nav-link:active {
    color: var(--primary);
    background: rgba(14, 165, 233, 0.16);
}

.nav-link.btn-primary,
.nav-link.btn-primary:visited {
    color: var(--white);
    padding-inline: 1.1rem;
}

.hero,
.features,
.get-tool,
.efficiency-data,
.video-section,
.faq,
.articles,
.news-section,
.article-detail {
    padding-block: clamp(4rem, 7vw, 7rem);
}

.hero {
    position: relative;
    min-height: min(48rem, calc(100vh - var(--header-height)));
    display: grid;
    align-items: center;
    overflow: hidden;
    padding-bottom: clamp(6rem, 10vw, 8rem);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 62rem;
    margin-inline: auto;
    text-align: center;
}

.hero h1,
.news-header h1,
.features > .container > h2,
.get-tool > .container > h2,
.efficiency-data > .container > h2,
.video-section > .container > h2,
.faq > .container > h2,
.articles > .container > h2 {
    margin-bottom: 1.25rem;
    color: transparent;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
}

.hero-content > p {
    max-width: 50rem;
    margin: 0 auto 2rem;
    font-size: clamp(1rem, 0.9rem + 0.45vw, 1.25rem);
}

.home-feature-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
    margin: 2rem 0;
    padding: 0;
    list-style: none;
}

.home-feature-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    color: var(--light);
    background: rgba(30, 41, 59, 0.8);
    box-shadow: var(--shadow);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.home-feature-item:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-lg);
    transform: translateY(-0.125rem);
}

.home-feature-icon,
.stat-icon,
.meta-icon {
    flex: 0 0 auto;
    line-height: 1;
}

.home-feature-text {
    color: var(--light);
}

.hero-buttons,
.button-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.85rem;
}

.hero-buttons {
    margin-block: 2rem;
}

.user-stat {
    max-width: 31rem;
    margin: 1.5rem auto;
    padding: 0.8rem 1rem;
    border: 1px solid rgba(14, 165, 233, 0.22);
    border-radius: var(--radius-sm);
    background: rgba(14, 165, 233, 0.08);
    box-shadow: var(--shadow);
}

.stat-item {
    display: flex;
    min-width: 0;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.stat-value {
    min-width: 0;
    color: var(--light);
    overflow-wrap: anywhere;
}

.version-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem 1.5rem;
    margin: 1rem 0 0;
    padding: 0;
    list-style: none;
}

.wave-container {
    position: absolute;
    inset: auto 0 0;
    height: clamp(4rem, 8vw, 7rem);
    overflow: hidden;
    pointer-events: none;
}

.wave-container svg {
    display: block;
    width: 100%;
    height: 100%;
}

.wave-1 {
    fill: var(--dark-light);
}

.features,
.efficiency-data,
.faq {
    background: rgba(30, 41, 59, 0.72);
}

.features > .container > h2,
.get-tool > .container > h2,
.efficiency-data > .container > h2,
.video-section > .container > h2,
.faq > .container > h2,
.articles > .container > h2 {
    position: relative;
    margin-bottom: 3rem;
    text-align: center;
}

.features > .container > h2::after,
.get-tool > .container > h2::after,
.efficiency-data > .container > h2::after,
.video-section > .container > h2::after,
.faq > .container > h2::after,
.articles > .container > h2::after {
    position: absolute;
    left: 50%;
    bottom: -0.75rem;
    width: 5rem;
    height: 0.2rem;
    border-radius: var(--radius-pill);
    content: "";
    background: var(--gradient-primary);
    transform: translateX(-50%);
}

.section-intro,
.centered-copy {
    max-width: 66rem;
    margin-inline: auto;
    text-align: center;
}

.section-intro {
    margin-bottom: 2.2rem;
}

.section-intro-compact {
    margin-bottom: 1.5rem;
}

.articles-intro {
    margin-bottom: 3rem;
}

.subsection-title {
    margin-bottom: 1.25rem;
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
    gap: clamp(1.25rem, 2.3vw, 2rem);
}

.feature-card {
    position: relative;
    overflow: hidden;
    padding: clamp(1.4rem, 2.4vw, 2rem);
    text-align: center;
}

.feature-card::before {
    position: absolute;
    inset: 0 0 auto;
    height: 0.2rem;
    content: "";
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.2s ease;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    margin-bottom: 1rem;
    font-size: 2.2rem;
    line-height: 1;
}

.feature-card h3 {
    margin-bottom: 0.75rem;
}

.feature-card p {
    margin-bottom: 0;
}

.steps-container {
    position: relative;
    max-width: 72rem;
    margin-inline: auto;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1.25rem, 2.5vw, 2rem);
}

.step-card {
    position: relative;
    display: flex;
    min-width: 0;
    flex-direction: column;
    align-items: center;
    padding: 2.3rem 1.5rem 1.6rem;
    text-align: center;
}

.step-card p {
    flex: 1 1 auto;
}

.step-number {
    position: absolute;
    top: -1.25rem;
    left: 50%;
    display: grid;
    width: 2.5rem;
    height: 2.5rem;
    place-items: center;
    border-radius: 50%;
    color: var(--white);
    background: var(--gradient-primary);
    box-shadow: 0 0 1rem rgba(14, 165, 233, 0.35);
    font-weight: 800;
    transform: translateX(-50%);
}

.data-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.data-card {
    padding: 1.4rem;
    text-align: center;
}

.data-value {
    margin-bottom: 0.35rem;
    color: transparent;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    font-size: clamp(2rem, 1.5rem + 2vw, 2.8rem);
    font-weight: 800;
    line-height: 1.15;
}

.data-label {
    color: var(--muted);
}

.player-testimonials {
    margin-block: 3rem;
}

.testimonial-list {
    max-width: 58rem;
    margin-inline: auto;
}

.testimonial-item {
    margin-bottom: 1rem;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: rgba(15, 23, 42, 0.72);
}

.testimonial-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.55rem;
}

.testimonial-label {
    color: var(--light);
}

.testimonial-value {
    font-weight: 800;
}

.data-bar-container {
    height: 0.75rem;
    overflow: hidden;
    border-radius: var(--radius-pill);
    background: rgba(14, 165, 233, 0.1);
}

.data-bar {
    width: min(var(--width, 100%), 100%);
    height: 100%;
    border-radius: inherit;
}

.data-bar.primary,
.data-bar.secondary {
    background: var(--gradient-primary);
}

.data-bar.danger {
    background: var(--gradient-danger);
}

.data-bar.tertiary {
    background: var(--gradient-tertiary);
}

.why-choose {
    margin-top: 3rem;
    padding: clamp(1.3rem, 3vw, 2rem);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: rgba(14, 165, 233, 0.05);
    text-align: center;
}

.why-choose .button-group {
    margin-top: 1.5rem;
}

.video-section {
    background: rgba(15, 23, 42, 0.78);
}

.video-container,
.video-seo-info {
    max-width: 62rem;
    margin-inline: auto;
}

.video-container {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--dark-light);
    box-shadow: var(--shadow);
}

.video-player {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 9;
    border: 0;
    background: var(--dark-light);
    object-fit: cover;
}

.video-fallback {
    padding: 1rem;
    text-align: center;
}

.fallback-image {
    display: block;
    width: 100%;
    margin-top: 1rem;
}

.video-caption {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border);
    background: rgba(15, 23, 42, 0.88);
    text-align: center;
}

.video-caption p,
.video-description p {
    margin-bottom: 0;
}

.video-seo-info {
    margin-top: 1.25rem;
    padding: 1.25rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: rgba(15, 23, 42, 0.6);
}

.video-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.65rem;
    margin-bottom: 0.8rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px dashed rgba(160, 174, 192, 0.24);
    color: var(--muted);
    font-size: 0.93rem;
}

.faq-container {
    max-width: 62rem;
    margin-inline: auto;
}

.faq-item {
    position: relative;
    margin-bottom: 0.85rem;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: rgba(15, 23, 42, 0.84);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item:hover,
.faq-item:focus-within {
    border-color: var(--border-strong);
    box-shadow: var(--shadow);
}

.faq-checkbox {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    opacity: 0;
}

.faq-question {
    position: relative;
    display: block;
    width: 100%;
    padding: 1rem 3.4rem 1rem 1.25rem;
    color: var(--light);
    cursor: pointer;
    font-weight: 700;
    text-align: left;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.faq-question::after {
    position: absolute;
    top: 50%;
    right: 1.25rem;
    color: var(--primary);
    content: "+";
    font-size: 1.55rem;
    line-height: 1;
    transform: translateY(-50%);
}

.faq-question:hover {
    color: var(--secondary);
    background: rgba(14, 165, 233, 0.06);
}

.faq-question:focus-visible {
    outline: 0.1875rem solid rgba(34, 211, 238, 0.75);
    outline-offset: -0.1875rem;
}

.faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    visibility: hidden;
    transition: grid-template-rows 0.3s ease, visibility 0s linear 0.3s;
}

.faq-answer > * {
    min-height: 0;
    overflow: hidden;
}

.faq-answer p {
    margin: 0;
    padding: 0 1.25rem;
    border-top: 0 solid rgba(14, 165, 233, 0.16);
    background: rgba(14, 165, 233, 0.045);
    line-height: 1.85;
    transition: padding 0.3s ease, border-top-width 0.3s ease;
}

.faq-checkbox:checked ~ .faq-answer {
    grid-template-rows: 1fr;
    visibility: visible;
    transition-delay: 0s;
}

.faq-checkbox:checked ~ .faq-answer p {
    padding: 1.25rem 1.25rem 1.35rem;
    border-top-width: 1px;
}

.faq-checkbox:checked ~ .faq-question::after {
    content: "−";
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
    gap: clamp(1.15rem, 2.2vw, 1.75rem);
}

.articles-grid > li,
.news-list > li {
    min-width: 0;
}

.article-card {
    display: flex;
    min-height: 18rem;
    height: 100%;
    flex-direction: column;
    overflow: hidden;
}

.article-card .article-content {
    display: flex;
    min-width: 0;
    height: 100%;
    flex-direction: column;
    padding: 1.4rem;
}

.article-date,
.news-date {
    display: inline-flex;
    width: fit-content;
    max-width: 100%;
    align-items: center;
    margin-bottom: 0.85rem;
    padding: 0.25rem 0.7rem;
    border-radius: var(--radius-pill);
    color: var(--muted);
    background: rgba(14, 165, 233, 0.1);
    font-size: 0.9rem;
    line-height: 1.4;
    white-space: nowrap;
}

.article-title,
.news-title {
    margin: 0 0 0.75rem;
    color: var(--light);
    background: none;
    font-weight: 800;
    text-align: left;
}

.article-title {
    display: -webkit-box;
    overflow: hidden;
    font-size: 1.35rem;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.article-title a,
.news-title a {
    color: inherit;
}

.article-title a:hover,
.news-title a:hover {
    color: var(--secondary);
}

.article-excerpt,
.news-excerpt {
    color: var(--muted);
    overflow-wrap: anywhere;
}

.article-excerpt {
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.article-card .read-more {
    margin-top: auto;
}

.read-more {
    display: inline-flex;
    width: fit-content;
    align-items: center;
    gap: 0.4rem;
    color: var(--primary);
    font-weight: 700;
}

.read-more svg {
    flex: 0 0 auto;
    width: 1rem;
    height: 1rem;
}

.read-more:hover {
    color: var(--secondary);
    transform: translateX(0.2rem);
}

.more-articles {
    margin-top: 2.2rem;
    text-align: center;
}

.site-footer {
    padding: 3rem 0 1.4rem;
    border-top: 1px solid var(--border);
    color: var(--white);
    background: var(--gradient);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0;
    text-align: center;
}

.footer-column {
    width: 100%;
    max-width: 58rem;
}

.footer-column + .footer-column {
    max-width: 100%;
    margin-top: 1.75rem;
    padding-top: 1.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-title {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--light);
    font-size: 1.35rem;
    font-weight: 800;
}

.footer-column p {
    margin-inline: auto;
}

.friend-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.65rem 1.4rem;
    margin-top: 1rem;
}

.friend-links a {
    color: var(--muted);
}

.friend-links a:hover {
    color: var(--secondary);
}

.copyright {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--muted);
    font-size: 0.92rem;
    text-align: center;
    overflow-wrap: anywhere;
}

.news-section,
.article-detail {
    min-height: 55vh;
}

.breadcrumb {
    display: flex;
    width: 100%;
    min-height: 3.25rem;
    align-items: center;
    margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: rgba(15, 23, 42, 0.54);
    font-size: 0.94rem;
}

.breadcrumb ol {
    display: flex;
    min-width: 0;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 0.55rem;
}

.breadcrumb li {
    min-width: 0;
    color: var(--muted);
    overflow-wrap: anywhere;
}

.breadcrumb li:not(:last-child)::after {
    margin-left: 0.55rem;
    color: #64748b;
    content: "/";
}

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

.breadcrumb a:hover {
    color: var(--secondary);
}

.breadcrumb [aria-current="page"] {
    color: var(--light);
}

.news-header {
    width: 100%;
    max-width: none;
    margin: 0 0 clamp(2rem, 5vw, 3.75rem);
    text-align: center;
}

.news-header h1 {
    margin-bottom: 0.8rem;
    font-size: clamp(1.9rem, 1.35rem + 2.1vw, 3.25rem);
}

.news-header p {
    max-width: 48rem;
    margin-inline: auto;
    font-size: 1.05rem;
}

.news-list {
    display: grid;
    gap: 1.25rem;
    width: 100%;
    margin-bottom: 3rem;
}

.news-article {
    min-width: 0;
    padding: clamp(1.25rem, 2.5vw, 2rem);
    overflow: hidden;
}

.news-content {
    min-width: 0;
}

.news-title {
    font-size: clamp(1.3rem, 1.05rem + 0.9vw, 1.85rem);
    line-height: 1.35;
    overflow-wrap: anywhere;
}

.news-excerpt {
    max-width: 76ch;
    margin-bottom: 0.9rem;
    line-height: 1.75;
}

nav.pagination {
    margin-top: 2.25rem;
}

.pagination,
.pagination > ul,
.pagination > ol,
ul.pagination,
ul.page {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
}

.pagination > ul,
.pagination > ol,
ul.pagination,
ul.page {
    margin: 0;
    padding: 0;
    list-style: none;
}

.pagination li,
ul.pagination li,
ul.page li {
    display: flex;
    margin: 0;
    list-style: none;
}

.pagination a,
.pagination span,
ul.pagination a,
ul.pagination span,
ul.page a,
ul.page span {
    display: inline-flex;
    min-width: 2.65rem;
    min-height: 2.65rem;
    align-items: center;
    justify-content: center;
    padding: 0.45rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--muted);
    background: rgba(15, 23, 42, 0.8);
    line-height: 1.2;
    text-align: center;
}

.pagination a:hover,
ul.pagination a:hover,
ul.page a:hover {
    color: var(--white);
    border-color: var(--primary);
    background: rgba(14, 165, 233, 0.2);
}

.pagination a:active,
ul.pagination a:active,
ul.page a:active {
    color: var(--white);
    background: var(--primary-dark);
}

.pagination [aria-current="page"],
.pagination .active > a,
.pagination .active > span,
.pagination a.active,
.pagination span.active,
.pagination .current,
.pagination a.current,
.pagination span.current,
ul.pagination [aria-current="page"],
ul.pagination .active > a,
ul.pagination .active > span,
ul.pagination a.active,
ul.pagination span.active,
ul.pagination .current,
ul.page [aria-current="page"],
ul.page .active > a,
ul.page .active > span,
ul.page a.active,
ul.page span.active,
ul.page .current {
    color: var(--white);
    border-color: var(--primary);
    background: var(--gradient-primary);
    font-weight: 800;
}

.pagination .disabled,
.pagination .disabled > a,
.pagination .disabled > span,
.pagination [aria-disabled="true"],
ul.pagination .disabled,
ul.pagination .disabled > a,
ul.pagination .disabled > span,
ul.page .disabled,
ul.page .disabled > a,
ul.page .disabled > span {
    cursor: not-allowed;
    opacity: 0.48;
    pointer-events: none;
}

.article-body-card,
.article-navigation {
    width: 100%;
}

.article-body-card {
    margin: 0;
}

.article-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
    text-align: center;
}

.article-header h1 {
    margin: 0 0 1rem;
    color: transparent;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    font-size: clamp(1.9rem, 1.35rem + 2.1vw, 3.25rem);
}

.article-header .article-meta {
    margin-bottom: 0;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.7rem 1.4rem;
    margin-bottom: 1.75rem;
    color: var(--muted);
}

.article-meta > div {
    display: inline-flex;
    min-width: 0;
    align-items: center;
    gap: 0.45rem;
}

.article-meta .icon,
.tags-group .icon {
    color: var(--primary);
    line-height: 1;
}

.article-excerpt-container {
    margin-bottom: 2rem;
    padding: 1.25rem 1.4rem;
    border-left: 0.2rem solid var(--primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: rgba(14, 165, 233, 0.06);
}

.excerpt-title {
    margin-bottom: 0.55rem;
    color: var(--light);
    font-size: 1.2rem;
    font-weight: 800;
}

.article-excerpt-container p:last-child {
    margin-bottom: 0;
}

.article-detail .article-content {
    max-width: 100%;
    color: var(--muted);
    font-size: clamp(1rem, 0.96rem + 0.2vw, 1.08rem);
    line-height: 1.82;
    overflow-wrap: anywhere;
}

.article-detail .article-content p,
.article-detail .article-content ul,
.article-detail .article-content ol,
.article-detail .article-content figure,
.article-detail .article-content table,
.article-detail .article-content blockquote,
.article-detail .article-content pre,
.article-detail .article-content details {
    margin-top: 0;
    margin-bottom: 1.35rem;
}

.article-detail .article-content p {
    color: var(--muted);
}

.article-detail .article-content h1,
.article-detail .article-content h2,
.article-detail .article-content h3,
.article-detail .article-content h4,
.article-detail .article-content h5,
.article-detail .article-content h6 {
    margin: 2rem 0 0.85rem;
    padding: 0;
    color: var(--light);
    background: none;
    font-weight: 800;
    line-height: 1.3;
    text-align: left;
}

.article-detail .article-content h1:first-child,
.article-detail .article-content h2:first-child,
.article-detail .article-content h3:first-child,
.article-detail .article-content h4:first-child,
.article-detail .article-content h5:first-child,
.article-detail .article-content h6:first-child {
    margin-top: 0;
}

.article-detail .article-content h1 { font-size: clamp(1.75rem, 1.35rem + 1.7vw, 2.7rem); }
.article-detail .article-content h2 { font-size: clamp(1.5rem, 1.22rem + 1.15vw, 2.15rem); }
.article-detail .article-content h3 { font-size: clamp(1.3rem, 1.13rem + 0.7vw, 1.7rem); }
.article-detail .article-content h4 { font-size: 1.25rem; }
.article-detail .article-content h5 { font-size: 1.1rem; }
.article-detail .article-content h6 { font-size: 1rem; letter-spacing: 0.02em; }

.article-detail .article-content strong {
    color: var(--light);
    font-weight: 800;
}

.article-detail .article-content em {
    font-style: italic;
}

.article-detail .article-content mark {
    padding: 0.08em 0.28em;
    border-radius: 0.2rem;
    color: var(--dark);
    background: #fde68a;
}

.article-detail .article-content ul,
.article-detail .article-content ol {
    padding-left: 1.7rem;
}

.article-detail .article-content ul { list-style: disc; }
.article-detail .article-content ol { list-style: decimal; }
.article-detail .article-content li { margin-bottom: 0.45rem; }
.article-detail .article-content li::marker { color: var(--primary); }
.article-detail .article-content li > ul,
.article-detail .article-content li > ol { margin: 0.45rem 0; }

.article-detail .article-content img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 1.4rem auto;
    border-radius: var(--radius-sm);
}

.article-detail .article-content figure {
    max-width: 100%;
}

.article-detail .article-content figure img {
    margin-bottom: 0;
}

.article-detail .article-content figcaption {
    margin-top: 0.55rem;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.55;
    text-align: center;
}

.article-detail .article-content table {
    display: block;
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    border-collapse: collapse;
    border-spacing: 0;
    -webkit-overflow-scrolling: touch;
}

.article-detail .article-content caption {
    margin-bottom: 0.65rem;
    color: var(--light);
    font-weight: 700;
    text-align: left;
}

.article-detail .article-content thead,
.article-detail .article-content tbody,
.article-detail .article-content tr {
    border-color: inherit;
}

.article-detail .article-content th,
.article-detail .article-content td {
    min-width: 8rem;
    padding: 0.7rem 0.85rem;
    border: 1px solid rgba(148, 163, 184, 0.25);
    text-align: left;
    vertical-align: top;
}

.article-detail .article-content th {
    color: var(--light);
    background: rgba(14, 165, 233, 0.09);
    font-weight: 800;
}

.article-detail .article-content td {
    color: var(--muted);
}

.article-detail .article-content blockquote {
    padding: 1rem 1.2rem;
    border-left: 0.25rem solid var(--primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: rgba(14, 165, 233, 0.06);
}

.article-detail .article-content blockquote > :last-child {
    margin-bottom: 0;
}

.article-detail .article-content cite {
    display: block;
    margin-top: 0.7rem;
    color: var(--light);
    font-size: 0.92rem;
    font-style: normal;
}

.article-detail .article-content code,
.article-detail .article-content pre,
.article-detail .article-content kbd {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.article-detail .article-content code {
    padding: 0.12em 0.35em;
    border-radius: 0.3rem;
    color: var(--light);
    background: rgba(148, 163, 184, 0.16);
    font-size: 0.9em;
}

.article-detail .article-content pre {
    max-width: 100%;
    padding: 1rem;
    overflow-x: auto;
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: var(--radius-sm);
    color: var(--light);
    background: #0b1220;
    -webkit-overflow-scrolling: touch;
}

.article-detail .article-content pre code {
    display: block;
    min-width: max-content;
    padding: 0;
    color: inherit;
    background: transparent;
    white-space: pre;
}

.article-detail .article-content kbd {
    display: inline-block;
    padding: 0.1em 0.4em;
    border: 1px solid rgba(148, 163, 184, 0.4);
    border-bottom-width: 0.14rem;
    border-radius: 0.3rem;
    color: var(--light);
    background: rgba(15, 23, 42, 0.92);
    font-size: 0.88em;
}

.article-detail .article-content details {
    padding: 0.9rem 1rem;
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: var(--radius-sm);
    background: rgba(14, 165, 233, 0.05);
}

.article-detail .article-content summary {
    color: var(--light);
    cursor: pointer;
    font-weight: 800;
}

.article-detail .article-content summary:focus-visible {
    border-radius: 0.2rem;
    outline: 0.1875rem solid rgba(34, 211, 238, 0.75);
    outline-offset: 0.1875rem;
}

.article-detail .article-content details[open] summary {
    margin-bottom: 0.8rem;
}

.article-detail .article-content details > :last-child {
    margin-bottom: 0;
}

.article-detail .article-content abbr[title] {
    cursor: help;
    text-decoration: underline dotted;
    text-underline-offset: 0.15em;
}

.article-detail .article-content time {
    color: var(--muted);
}

.article-detail .article-content a {
    color: var(--primary);
    text-decoration: underline;
    text-decoration-thickness: 0.08em;
}

.article-detail .article-content a:visited {
    color: #38bdf8;
}

.article-detail .article-content a:hover {
    color: var(--secondary);
}

.article-detail .article-content a:active {
    color: var(--primary-dark);
}

.tags-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.tag-item {
    display: inline-flex;
    align-items: center;
    min-height: 2rem;
    padding: 0.28rem 0.75rem;
    border: 1px solid rgba(14, 165, 233, 0.22);
    border-radius: var(--radius-pill);
    color: var(--primary);
    background: rgba(14, 165, 233, 0.08);
    font-size: 0.86rem;
    white-space: nowrap;
}

.article-navigation {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
    max-width: none;
    margin: 2.5rem 0 0;
    padding-top: 1.75rem;
    border-top: 1px solid var(--border);
}

.article-nav-item {
    min-width: 0;
}

.article-nav-next {
    text-align: right;
}

.article-nav-label {
    margin-bottom: 0.4rem;
    color: var(--muted);
    font-size: 0.92rem;
}

.nav-title {
    max-width: 100%;
    color: var(--light);
    font-weight: 700;
    overflow-wrap: anywhere;
}

.article-nav-item a.nav-title {
    display: inline-block;
}

.article-nav-item a.nav-title:hover {
    color: var(--secondary);
}

@media (max-width: 56rem) {
    :root {
        --header-height: 4.25rem;
    }

    .header-container {
        gap: 0.6rem;
    }

    .logo {
        max-width: calc(100% - 3.5rem);
    }

    .logo a {
        max-width: 100%;
    }

    .logo-name {
        font-size: 1.15rem;
    }

    .menu-toggle {
        position: relative;
        z-index: 1003;
        display: block;
        width: 2.8rem;
        height: 2.8rem;
        flex: 0 0 2.8rem;
        border: 1px solid rgba(14, 165, 233, 0.22);
        border-radius: var(--radius-sm);
        cursor: pointer;
        background: rgba(14, 165, 233, 0.08);
    }

    .menu-toggle:hover {
        border-color: var(--border-strong);
        background: rgba(14, 165, 233, 0.14);
    }

    .menu-toggle:focus-visible {
        outline: 0.1875rem solid rgba(34, 211, 238, 0.75);
        outline-offset: 0.1875rem;
    }

    .menu-toggle:active {
        background: rgba(14, 165, 233, 0.22);
    }

    .menu-toggle::before,
    .menu-toggle::after {
        position: absolute;
        left: 50%;
        width: 1.35rem;
        height: 0.125rem;
        border-radius: var(--radius-pill);
        content: "";
        background: var(--secondary);
        transform: translateX(-50%);
        transition: top 0.2s ease, bottom 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    }

    .menu-toggle::before {
        top: 0.85rem;
        box-shadow: 0 0.48rem 0 var(--secondary);
    }

    .menu-toggle::after {
        bottom: 0.85rem;
    }

    .menu-checkbox:checked + .menu-toggle::before {
        top: 50%;
        box-shadow: none;
        background: var(--white);
        transform: translate(-50%, -50%) rotate(45deg);
    }

    .menu-checkbox:checked + .menu-toggle::after {
        bottom: 50%;
        background: var(--white);
        transform: translate(-50%, 50%) rotate(-45deg);
    }

    .menu-backdrop {
        position: fixed;
        inset: 0;
        z-index: 1001;
        display: block;
        visibility: hidden;
        background: rgba(2, 6, 23, 0.68);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.25s ease, visibility 0s linear 0.25s;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        z-index: 1002;
        width: min(76vw, 24rem);
        max-width: 100%;
        min-height: 100vh;
        height: 100dvh;
        padding: calc(var(--header-height) + 0.75rem) 0.9rem 1.25rem;
        overflow-x: hidden;
        overflow-y: auto;
        overscroll-behavior: contain;
        border-left: 1px solid rgba(34, 211, 238, 0.22);
        background: linear-gradient(180deg, #10203a 0%, #0f172a 60%, #0b1324 100%);
        box-shadow: -1rem 0 2.5rem rgba(2, 6, 23, 0.42);
        visibility: hidden;
        pointer-events: none;
        transform: translateX(100%);
        transition: transform 0.28s ease, visibility 0s linear 0.28s;
        -webkit-overflow-scrolling: touch;
    }

    .menu-checkbox:checked ~ .menu-backdrop {
        visibility: visible;
        opacity: 1;
        pointer-events: auto;
        transition-delay: 0s;
    }

    .menu-checkbox:checked ~ .main-nav {
        visibility: visible;
        pointer-events: auto;
        transform: translateX(0);
        transition-delay: 0s;
    }

    .nav-list {
        display: flex;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid rgba(148, 163, 184, 0.14);
    }

    .nav-link,
    .nav-link.btn-primary {
        display: flex;
        width: 100%;
        min-height: 3.5rem;
        align-items: center;
        justify-content: flex-start;
        margin: 0;
        padding: 0.8rem 0.95rem;
        border: 0;
        border-radius: 0;
        color: var(--light);
        background: transparent;
        box-shadow: none;
        font-size: 1rem;
        text-align: left;
        white-space: normal;
        overflow-wrap: anywhere;
    }

    .nav-link:hover,
    .nav-link.btn-primary:hover {
        color: var(--white);
        background: rgba(14, 165, 233, 0.14);
        box-shadow: inset 0.2rem 0 0 var(--secondary);
        transform: none;
    }

    .nav-link:active,
    .nav-link.btn-primary:active {
        color: var(--white);
        background: rgba(14, 165, 233, 0.24);
        transform: none;
    }

    .nav-item:last-child {
        margin-top: 0.8rem;
        border-bottom: 0;
    }

    .nav-item:last-child .nav-link {
        border: 1px solid rgba(34, 211, 238, 0.35);
        border-radius: var(--radius-sm);
        background: rgba(14, 165, 233, 0.13);
    }

    .hero,
    .features,
    .get-tool,
    .efficiency-data,
    .video-section,
    .faq,
    .articles,
    .news-section,
    .article-detail {
        padding-block: clamp(3.25rem, 9vw, 4.5rem);
    }

    .hero {
        min-height: auto;
        padding-top: 4rem;
        padding-bottom: 6rem;
    }

    .hero-buttons,
    .button-group {
        align-items: stretch;
    }

    .hero-buttons .btn,
    .button-group .btn {
        flex: 1 1 12rem;
    }

    .version-info {
        flex-direction: column;
        align-items: stretch;
    }

    .version-info .stat-item {
        justify-content: flex-start;
        text-align: left;
    }

    .steps-grid {
        grid-template-columns: 1fr;
        gap: 2.2rem;
    }

    .testimonial-header {
        align-items: flex-start;
    }

    .video-meta {
        flex-direction: column;
    }

    .breadcrumb {
        min-height: 3.25rem;
        padding: 0.7rem 0.85rem;
    }

    .news-header {
        margin-bottom: 2.25rem;
    }

    .news-article {
        padding: 1.15rem;
    }

    .article-header {
        margin-bottom: 1.5rem;
        padding-bottom: 1.25rem;
        text-align: left;
    }

    .article-header h1 {
        font-size: clamp(1.75rem, 1.35rem + 2vw, 2.4rem);
        text-align: left;
    }

    .article-meta {
        align-items: flex-start;
        justify-content: flex-start;
        gap: 0.6rem;
    }

    .article-meta > div {
        width: 100%;
    }

    .article-excerpt-container {
        padding: 1rem;
    }

    .article-detail .article-content {
        font-size: 1rem;
        line-height: 1.75;
    }

    .article-detail .article-content p,
    .article-detail .article-content ul,
    .article-detail .article-content ol,
    .article-detail .article-content figure,
    .article-detail .article-content table,
    .article-detail .article-content blockquote,
    .article-detail .article-content pre,
    .article-detail .article-content details {
        margin-bottom: 1.15rem;
    }

    .article-detail .article-content h1,
    .article-detail .article-content h2,
    .article-detail .article-content h3,
    .article-detail .article-content h4,
    .article-detail .article-content h5,
    .article-detail .article-content h6 {
        margin-top: 1.55rem;
    }

    .article-detail .article-content th,
    .article-detail .article-content td {
        padding: 0.6rem 0.7rem;
    }

    .article-navigation {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .article-nav-next {
        text-align: left;
    }
}

@media (max-width: 30rem) {
    .container,
    .article-container {
        padding-inline: 0.85rem;
    }

    .logo-icon {
        font-size: 1.55rem;
    }

    .menu-toggle {
        width: 2.65rem;
        height: 2.65rem;
        flex-basis: 2.65rem;
    }

    .main-nav {
        width: min(78vw, 22rem);
    }

    .home-feature-container {
        align-items: stretch;
    }

    .home-feature-item {
        width: 100%;
        justify-content: center;
    }

    .hero-buttons .btn,
    .button-group .btn {
        flex-basis: 100%;
        width: 100%;
    }

    .news-title {
        font-size: 1.25rem;
    }

    .pagination a,
    .pagination span,
    ul.pagination a,
    ul.pagination span,
    ul.page a,
    ul.page span {
        min-width: 2.45rem;
        min-height: 2.45rem;
        padding-inline: 0.55rem;
    }
}

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

    a,
    .btn,
    .card,
    .news-article,
    .feature-card::before,
    .faq-item,
    .faq-question,
    .faq-answer,
    .menu-toggle::before,
    .menu-toggle::after,
    .menu-backdrop,
    .main-nav,
    .home-feature-item {
        transition-duration: 0.01ms;
    }
}