:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f97316;
    --secondary-dark: #ea580c;
    --accent-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-dark: #111827;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.1);
    --shadow-lg: 0 12px 28px rgba(15, 23, 42, 0.14);
    --shadow-xl: 0 24px 48px rgba(15, 23, 42, 0.18);
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --nav-height: 5rem;
    --container-width: 90rem;
    --motion-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    min-width: 20rem;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 1rem);
    font-size: 16px;
}

body {
    min-width: 20rem;
    margin: 0;
    color: var(--text-primary);
    background: var(--bg-primary);
    font-family: "Inter", "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
    font-size: 1rem;
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body.nav-open {
    overflow: hidden;
}

[hidden] {
    display: none;
}

img,
picture,
svg,
video,
canvas {
    display: block;
    max-width: 100%;
}

img {
    height: auto;
}

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

button {
    color: inherit;
}

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

ul,
ol {
    margin: 0;
    padding: 0;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    text-underline-offset: 0.18em;
    overflow-wrap: anywhere;
    transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease, opacity 180ms ease, transform 180ms ease;
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

a:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.35);
    outline-offset: 3px;
    border-radius: 0.2rem;
}

a:active {
    color: var(--secondary-dark);
    transform: translateY(1px);
}

a.disabled,
a[disabled],
a[aria-disabled="true"],
a:not([href]) {
    color: var(--text-light);
    opacity: 0.58;
    cursor: not-allowed;
    pointer-events: none;
    text-decoration: none;
    transform: none;
}

button:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.35);
    outline-offset: 3px;
}

button:disabled,
button[aria-disabled="true"] {
    opacity: 0.58;
    cursor: not-allowed;
}

::selection {
    color: #ffffff;
    background: var(--primary-color);
}

.container,
.nav-container,
.hero-container {
    width: min(100% - 3rem, var(--container-width));
    margin-inline: auto;
}

.site-main {
    min-width: 0;
}

section[id] {
    scroll-margin-top: calc(var(--nav-height) + 1rem);
}

.section-header {
    max-width: 56rem;
    margin-inline: auto;
    margin-bottom: clamp(2.5rem, 4vw, 4rem);
    text-align: center;
}

.section-header h1,
.section-header h2 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: clamp(2rem, 3.2vw, 3.25rem);
    font-weight: 750;
    letter-spacing: -0.035em;
    line-height: 1.18;
    text-wrap: balance;
}

.section-header p {
    max-width: 46rem;
    margin-inline: auto;
    color: var(--text-secondary);
    font-size: clamp(1rem, 1.3vw, 1.25rem);
    line-height: 1.75;
    text-wrap: pretty;
}

.skip-link {
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 1100;
    padding: 0.65rem 0.9rem;
    color: #ffffff;
    background: var(--primary-dark);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    text-decoration: none;
    transform: translateY(-150%);
    transition: transform 180ms ease;
}

.skip-link:hover,
.skip-link:focus-visible {
    color: #ffffff;
    text-decoration: none;
    transform: translateY(0);
}

.skip-link:active {
    color: #ffffff;
    background: var(--secondary-dark);
}

.skip-link.disabled,
.skip-link[disabled],
.skip-link[aria-disabled="true"] {
    color: #d1d5db;
    background: #6b7280;
    transform: translateY(-150%);
}

.navbar {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid rgba(229, 231, 235, 0.9);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    transition: background-color 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.985);
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 0;
    height: 100%;
    gap: 2rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    min-width: 0;
    height: 100%;
    flex: 0 1 auto;
}

.nav-logo a {
    display: inline-flex;
    align-items: center;
    max-width: 100%;
    height: 100%;
    gap: 0.7rem;
    color: var(--text-primary);
    font-size: clamp(1.125rem, 1.6vw, 1.5rem);
    font-weight: 750;
    line-height: 1;
    text-decoration: none;
}

.nav-logo a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

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

.nav-logo i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 1.65rem;
    width: 1.65rem;
    margin: 0;
    color: var(--primary-color);
    font-size: 1.65rem;
    line-height: 1;
}

.nav-logo span {
    display: block;
    min-width: 0;
    line-height: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    min-width: 0;
    gap: clamp(1rem, 2vw, 2rem);
    list-style: none;
}

.nav-menu li {
    min-width: 0;
}

.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding-block: 0.6rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
    text-decoration: none;
}

.nav-link::after {
    position: absolute;
    right: 0;
    bottom: 0.25rem;
    left: 0;
    height: 2px;
    content: "";
    background: var(--primary-color);
    border-radius: 999px;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 220ms ease;
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--primary-color);
    text-decoration: none;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-link:active {
    color: var(--primary-dark);
}

.hamburger {
    display: none;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0.55rem;
    border: 0;
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
}

.hamburger .bar {
    display: block;
    width: 100%;
    height: 3px;
    margin-block: 4px;
    background: var(--text-primary);
    border-radius: 999px;
    transform-origin: center;
    transition: opacity 180ms ease, transform 220ms ease;
}

.hamburger.active .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.25rem;
    gap: 0.55rem;
    padding: 0.85rem 1.65rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.2;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    overflow: hidden;
    isolation: isolate;
    transition: color 220ms ease, background-color 220ms ease, border-color 220ms ease, box-shadow 220ms ease, transform 220ms var(--motion-ease);
}

.btn::before {
    position: absolute;
    inset: 0;
    z-index: -1;
    content: "";
    background: linear-gradient(110deg, transparent 20%, rgba(255, 255, 255, 0.3) 48%, transparent 76%);
    transform: translateX(-130%);
    transition: transform 480ms ease;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-2px);
}

.btn:hover::before {
    transform: translateX(130%);
}

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

.btn-primary {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    box-shadow: var(--shadow-md);
}

.btn-primary:hover,
.btn-primary:focus-visible {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    color: #ffffff;
    background: var(--primary-dark);
}

.btn-secondary {
    color: var(--text-primary);
    background: var(--bg-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
    color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.btn-secondary:active {
    color: var(--primary-dark);
    background: var(--bg-secondary);
}

.btn-outline {
    color: var(--primary-color);
    background: transparent;
    border-color: var(--primary-color);
    box-shadow: none;
}

.btn-outline:hover,
.btn-outline:focus-visible {
    color: #ffffff;
    background: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.btn-outline:active {
    color: #ffffff;
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn.disabled,
.btn[aria-disabled="true"] {
    color: var(--text-light);
    background: var(--bg-secondary);
    border-color: var(--border-color);
    box-shadow: none;
}

.hero-intro {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 100svh;
    padding-block: calc(var(--nav-height) + clamp(3rem, 6vw, 7rem)) clamp(4rem, 6vw, 7rem);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    overflow: hidden;
}

.hero-intro::before {
    position: absolute;
    top: 15%;
    left: 8%;
    z-index: 1;
    width: 0;
    height: 0;
    content: "";
    border-right: 5rem solid transparent;
    border-bottom: 8.75rem solid rgba(37, 99, 235, 0.3);
    border-left: 5rem solid transparent;
    filter: drop-shadow(0 0 1.25rem rgba(37, 99, 235, 0.35));
    animation: triangleRotate 15s ease-in-out infinite;
}

.hero-intro::after {
    position: absolute;
    right: 7%;
    bottom: 18%;
    z-index: 1;
    width: 7.5rem;
    aspect-ratio: 1;
    content: "";
    background: linear-gradient(45deg, rgba(249, 115, 22, 0.25), rgba(147, 51, 234, 0.2));
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
    animation: geometricPulse 18s ease-in-out infinite;
}

.hero-background,
.bg-animation {
    position: absolute;
    inset: 0;
}

.hero-background {
    z-index: 0;
}

.bg-animation {
    background: radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.1), transparent 50%), radial-gradient(circle at 80% 80%, rgba(249, 115, 22, 0.1), transparent 50%), radial-gradient(circle at 60% 40%, rgba(16, 185, 129, 0.06), transparent 50%);
    animation: backgroundFloat 20s ease-in-out infinite;
    will-change: transform;
}

.bg-animation::before {
    position: absolute;
    top: 55%;
    right: 22%;
    width: 3.125rem;
    aspect-ratio: 1;
    content: "";
    background: linear-gradient(45deg, rgba(147, 51, 234, 0.25), rgba(249, 115, 22, 0.2));
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
    filter: drop-shadow(0 0 0.75rem rgba(147, 51, 234, 0.3));
    animation: triangleRotate 20s ease-in-out infinite;
}

.bg-animation::after {
    position: absolute;
    bottom: 35%;
    left: 18%;
    width: 2.5rem;
    aspect-ratio: 1;
    content: "";
    background: conic-gradient(from 90deg, rgba(16, 185, 129, 0.2), rgba(37, 99, 235, 0.18), rgba(16, 185, 129, 0.2));
    border-radius: 25%;
    animation: geometricPulse 16s ease-in-out infinite reverse;
}

.light-sweep {
    position: absolute;
    inset: 0 auto 0 0;
    z-index: 1;
    width: 3px;
    background: linear-gradient(to bottom, transparent 20%, rgba(16, 185, 129, 0.8) 40%, rgba(37, 99, 235, 0.6) 60%, transparent 80%);
    box-shadow: 0 0 0.75rem rgba(16, 185, 129, 0.45);
    animation: lightSweep 25s linear infinite;
}

.hero-container {
    position: relative;
    z-index: 2;
    display: grid;
    place-items: center;
}

.hero-content {
    width: min(100%, 62rem);
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    padding: 0.55rem 1.35rem;
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.22);
    border-radius: var(--radius-xl);
    animation: fadeInUp 700ms ease 120ms both;
}

.badge-text {
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.hero-title {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    letter-spacing: -0.045em;
    line-height: 1.08;
    text-wrap: balance;
    animation: fadeInUp 700ms ease 240ms both;
}

.hero-subtitle {
    max-width: 58rem;
    margin: 0 auto 1rem;
    color: var(--text-secondary);
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    font-weight: 550;
    line-height: 1.7;
    text-wrap: pretty;
    animation: fadeInUp 700ms ease 360ms both;
}

.hero-description {
    max-width: 58rem;
    margin: 0 auto 3rem;
    color: var(--text-light);
    font-size: clamp(1rem, 1.35vw, 1.125rem);
    line-height: 1.85;
    text-wrap: pretty;
    animation: fadeInUp 700ms ease 480ms both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: 60rem;
    margin: 0 auto 3rem;
    gap: clamp(1rem, 3vw, 3rem);
    animation: fadeInUp 700ms ease 600ms both;
}

.stat-item {
    min-width: 0;
    padding: 0.5rem;
    text-align: center;
}

.stat-number {
    margin-bottom: 0.55rem;
    color: var(--primary-color);
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 800;
    line-height: 1.1;
}

.stat-label {
    color: var(--text-light);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    line-height: 1.5;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    animation: fadeInUp 700ms ease 720ms both;
}

.video-demo,
.features,
.usage-guide,
.notice,
.faq,
.pricing,
.articles,
.contact {
    position: relative;
    padding-block: clamp(4rem, 6vw, 7rem);
    overflow: hidden;
}

.video-demo,
.usage-guide,
.pricing,
.contact {
    background: var(--bg-secondary);
}

.features,
.faq,
.articles {
    background: var(--bg-primary);
}

.video-demo::before,
.features::before,
.pricing::before,
.contact::before {
    position: absolute;
    z-index: 0;
    content: "";
    pointer-events: none;
}

.video-demo::after,
.features::after,
.pricing::after,
.articles::after,
.contact::after {
    position: absolute;
    z-index: 0;
    content: "";
    pointer-events: none;
}

.video-demo > .container,
.features > .container,
.usage-guide > .container,
.notice > .container,
.faq > .container,
.pricing > .container,
.articles > .container,
.contact > .container {
    position: relative;
    z-index: 1;
}

.video-demo::before {
    top: 25%;
    right: 8%;
    width: 6.25rem;
    aspect-ratio: 1;
    background: linear-gradient(60deg, rgba(16, 185, 129, 0.3), rgba(37, 99, 235, 0.2));
    clip-path: polygon(50% 0%, 93.3% 25%, 93.3% 75%, 50% 100%, 6.7% 75%, 6.7% 25%);
    filter: drop-shadow(0 0 0.9rem rgba(16, 185, 129, 0.35));
    animation: hexagonFloat 16s ease-in-out infinite;
}

.video-demo::after {
    bottom: 25%;
    left: 8%;
    width: 5rem;
    aspect-ratio: 1;
    background: conic-gradient(from 0deg, rgba(147, 51, 234, 0.25), rgba(249, 115, 22, 0.2), rgba(147, 51, 234, 0.25));
    border-radius: 1.25rem;
    animation: geometricPulse 14s ease-in-out infinite reverse;
}

.video-container {
    display: flex;
    justify-content: center;
}

.video-wrapper {
    width: min(100%, 62rem);
    margin: 0;
    background: var(--bg-dark);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.video-wrapper video {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000000;
    object-fit: cover;
}

.video-fallback {
    display: grid;
    place-items: center;
    min-height: 18rem;
    padding: 1.5rem;
    color: #d1d5db;
    background: var(--bg-dark);
    text-align: center;
}

.video-fallback img {
    margin-bottom: 1rem;
    border-radius: var(--radius-md);
}

.video-fallback p {
    max-width: 42rem;
    line-height: 1.75;
}

.video-wrapper figcaption {
    padding: 1.1rem 1.35rem;
    color: #d1d5db;
    background: var(--bg-dark);
    font-size: 0.9375rem;
    line-height: 1.75;
    text-align: left;
}

.features::before {
    top: 30%;
    left: 4%;
    width: 6.25rem;
    aspect-ratio: 1;
    background: linear-gradient(135deg, rgba(147, 51, 234, 0.3), rgba(37, 99, 235, 0.2));
    clip-path: polygon(20% 0%, 80% 0%, 100% 20%, 100% 80%, 80% 100%, 20% 100%, 0% 80%, 0% 20%);
    filter: drop-shadow(0 0 1.25rem rgba(147, 51, 234, 0.35));
    animation: geometricPulse 22s ease-in-out infinite;
}

.features::after {
    right: 9%;
    bottom: 22%;
    width: 0;
    height: 0;
    border-right: 3.75rem solid transparent;
    border-top: 7.5rem solid rgba(249, 115, 22, 0.25);
    border-left: 3.75rem solid transparent;
    filter: drop-shadow(0 0 1.4rem rgba(249, 115, 22, 0.28));
    animation: triangleRotate 20s ease-in-out infinite reverse;
}

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

.feature-card {
    position: relative;
    min-width: 0;
    padding: clamp(2rem, 3vw, 3rem) clamp(1.5rem, 2.2vw, 2rem);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    overflow: hidden;
    transition: border-color 240ms ease, box-shadow 240ms ease, transform 240ms var(--motion-ease);
}

.feature-card::before {
    position: absolute;
    inset: 0;
    content: "";
    background: linear-gradient(100deg, transparent 20%, rgba(37, 99, 235, 0.06) 50%, transparent 80%);
    transform: translateX(-120%);
    transition: transform 520ms ease;
}

.feature-card:hover {
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: var(--shadow-xl);
    transform: translateY(-0.5rem);
}

.feature-card:hover::before {
    transform: translateX(120%);
}

.feature-icon {
    display: grid;
    place-items: center;
    width: 5rem;
    aspect-ratio: 1;
    margin: 0 auto 1.75rem;
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: background 240ms ease, transform 240ms ease;
}

.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    transform: scale(1.06);
}

.feature-icon i {
    font-size: 2rem;
}

.feature-card h3 {
    margin-bottom: 0.9rem;
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 750;
    line-height: 1.35;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.75;
}

.guide-steps {
    display: grid;
    max-width: 58rem;
    margin-inline: auto;
    gap: 1.5rem;
}

.step {
    display: flex;
    align-items: flex-start;
    min-width: 0;
    gap: 1.75rem;
    padding: clamp(1.5rem, 2.5vw, 2.5rem);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms var(--motion-ease);
}

.step:hover {
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: var(--shadow-lg);
    transform: translateX(0.5rem);
}

.step-number {
    display: grid;
    place-items: center;
    flex: 0 0 3.75rem;
    width: 3.75rem;
    aspect-ratio: 1;
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    font-size: 1.45rem;
    font-weight: 800;
    transition: background 220ms ease, transform 220ms ease;
}

.step:hover .step-number {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    transform: scale(1.06);
}

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

.step-content h3 {
    margin-bottom: 0.45rem;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 750;
}

.step-content p {
    color: var(--text-secondary);
}

.notice {
    color: #ffffff;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
}

.notice-content > h2 {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: clamp(2.5rem, 4vw, 3.5rem);
    gap: 0.8rem;
    color: #ffffff;
    font-size: clamp(2rem, 3vw, 2.75rem);
    font-weight: 750;
    line-height: 1.25;
    text-align: center;
}

.notice-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
}

.notice-item {
    min-width: 0;
    padding: clamp(1.5rem, 2.5vw, 2.5rem);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: var(--radius-lg);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    transition: background-color 220ms ease, border-color 220ms ease, transform 220ms ease;
}

.notice-item:hover {
    background: rgba(255, 255, 255, 0.16);
    border-color: rgba(255, 255, 255, 0.38);
    transform: translateY(-0.25rem);
}

.notice-item h3 {
    margin-bottom: 1.25rem;
    color: #ffffff;
    font-size: 1.25rem;
    font-weight: 750;
}

.notice-item ul {
    list-style: none;
}

.notice-item li {
    position: relative;
    padding: 0.45rem 0 0.45rem 1.35rem;
    line-height: 1.7;
}

.notice-item li::before {
    position: absolute;
    top: 0.46rem;
    left: 0;
    content: "•";
    color: #ffffff;
    font-size: 1.15rem;
}

.faq-list {
    display: grid;
    max-width: 58rem;
    margin-inline: auto;
    gap: 1rem;
}

.faq-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: border-color 220ms ease, box-shadow 220ms ease;
}

.faq-item:hover,
.faq-item.active {
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: var(--shadow-md);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 1rem;
    padding: 1.35rem 1.5rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 0;
    text-align: left;
    cursor: pointer;
    transition: color 180ms ease, background-color 180ms ease;
}

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

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

.faq-title {
    color: inherit;
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.45;
}

.faq-question i {
    flex: 0 0 auto;
    color: var(--primary-color);
    transition: transform 220ms ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 1.5rem 1.35rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
}

.faq-answer p {
    padding-top: 1.15rem;
    border-top: 1px solid var(--border-color);
}

.pricing::before {
    top: 18%;
    left: 6%;
    width: 5rem;
    aspect-ratio: 1;
    background: linear-gradient(45deg, rgba(37, 99, 235, 0.25), rgba(16, 185, 129, 0.2));
    clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
    filter: drop-shadow(0 0 0.9rem rgba(37, 99, 235, 0.35));
    animation: hexagonFloat 18s ease-in-out infinite;
}

.pricing::after {
    right: 11%;
    bottom: 25%;
    width: 5.625rem;
    aspect-ratio: 1;
    background: conic-gradient(from 45deg, rgba(249, 115, 22, 0.3), rgba(147, 51, 234, 0.25), rgba(249, 115, 22, 0.3));
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
    animation: geometricPulse 16s ease-in-out infinite reverse;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
}

.pricing-card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100%;
    padding: 2rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: border-color 240ms ease, box-shadow 240ms ease, transform 240ms var(--motion-ease);
}

.pricing-card:hover {
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: var(--shadow-xl);
    transform: translateY(-0.5rem);
}

.pricing-card.featured {
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-color: var(--primary-color);
    transform: translateY(-0.6rem);
}

.pricing-card.featured:hover {
    transform: translateY(-1rem);
}

.pricing-badge {
    position: absolute;
    top: -0.8rem;
    left: 50%;
    padding: 0.45rem 1.1rem;
    color: #ffffff;
    background: var(--secondary-color);
    border-radius: 999px;
    box-shadow: var(--shadow-sm);
    font-size: 0.825rem;
    font-weight: 700;
    line-height: 1.2;
    white-space: nowrap;
    transform: translateX(-50%);
}

.pricing-header h3 {
    margin-bottom: 1.35rem;
    color: inherit;
    font-size: 1.45rem;
    font-weight: 750;
    line-height: 1.35;
}

.price {
    display: flex;
    align-items: flex-end;
    margin-bottom: 1.5rem;
    line-height: 1;
}

.currency {
    margin: 0 0.2rem 0.5rem 0;
    font-size: 1.2rem;
    opacity: 0.82;
}

.amount {
    font-size: clamp(2.75rem, 4vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.04em;
}

.period {
    margin: 0 0 0.4rem 0.3rem;
    font-size: 0.95rem;
    opacity: 0.82;
}

.pricing-features {
    flex: 1 1 auto;
    margin-block: 0.5rem 1.75rem;
}

.pricing-features ul {
    list-style: none;
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    padding-block: 0.55rem;
    font-size: 0.95rem;
    line-height: 1.55;
}

.pricing-features i {
    flex: 0 0 auto;
    margin-top: 0.2rem;
    color: var(--accent-color);
}

.pricing-card.featured .pricing-features i {
    color: #4ade80;
}

.pricing-footer {
    margin-top: auto;
}

.pricing-footer .btn {
    width: 100%;
}

.pricing-card.featured .btn-primary {
    color: var(--primary-dark);
    background: #ffffff;
    border-color: #ffffff;
}

.pricing-card.featured .btn-primary:hover,
.pricing-card.featured .btn-primary:focus-visible {
    color: var(--primary-dark);
    background: #f8fafc;
    border-color: #f8fafc;
}

.articles::after {
    bottom: 22%;
    left: 8%;
    width: 3.75rem;
    aspect-ratio: 1;
    background: radial-gradient(ellipse at center, rgba(249, 115, 22, 0.25), rgba(37, 99, 235, 0.2));
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
    animation: hexagonFloat 15s ease-in-out infinite reverse;
}

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

.article-card {
    min-width: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms var(--motion-ease);
}

.article-card:hover {
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: var(--shadow-xl);
    transform: translateY(-0.45rem);
}

.article-card .article-content {
    display: flex;
    flex-direction: column;
    min-width: 0;
    height: 100%;
    padding: clamp(1.4rem, 2.2vw, 2rem);
}

.article-card h2,
.article-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.3rem;
    font-weight: 750;
    line-height: 1.45;
}

.article-card h2 a,
.article-card h3 a {
    color: var(--text-primary);
    text-decoration: none;
}

.article-card h2 a:hover,
.article-card h2 a:focus-visible,
.article-card h3 a:hover,
.article-card h3 a:focus-visible {
    color: var(--primary-color);
    text-decoration: none;
}

.article-card h2 a:active,
.article-card h3 a:active {
    color: var(--primary-dark);
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.9rem;
}

.article-meta span {
    color: var(--text-light);
    font-size: 0.875rem;
}

.date {
    font-variant-numeric: tabular-nums;
}

.article-card p {
    flex: 1 1 auto;
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.75;
}

.read-more {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    gap: 0.45rem;
    color: var(--primary-color);
    font-weight: 700;
    text-decoration: none;
}

.read-more:hover,
.read-more:focus-visible {
    color: var(--primary-dark);
    text-decoration: none;
}

.read-more:hover i,
.read-more:focus-visible i {
    transform: translateX(0.2rem);
}

.read-more:active {
    color: var(--secondary-dark);
}

.read-more i {
    transition: transform 180ms ease;
}

.articles-footer {
    margin-top: 3rem;
    text-align: center;
}

.contact::before {
    top: 22%;
    left: 5%;
    width: 5.625rem;
    aspect-ratio: 1;
    background: conic-gradient(from 0deg, rgba(37, 99, 235, 0.25), rgba(16, 185, 129, 0.2), rgba(37, 99, 235, 0.25));
    clip-path: polygon(50% 0%, 93.3% 25%, 93.3% 75%, 50% 100%, 6.7% 75%, 6.7% 25%);
    filter: drop-shadow(0 0 1.1rem rgba(37, 99, 235, 0.28));
    animation: hexagonFloat 17s ease-in-out infinite;
}

.contact::after {
    right: 10%;
    bottom: 28%;
    width: 4.7rem;
    aspect-ratio: 1;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.25), rgba(147, 51, 234, 0.2));
    clip-path: polygon(30% 0%, 70% 0%, 100% 30%, 100% 70%, 70% 100%, 30% 100%, 0% 70%, 0% 30%);
    animation: geometricPulse 21s ease-in-out infinite reverse;
}

.contact-content {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(17rem, 1fr);
    align-items: center;
    gap: clamp(2.5rem, 5vw, 5rem);
}

.contact-info {
    min-width: 0;
}

.contact-info > h2 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: clamp(2rem, 3vw, 2.75rem);
    font-weight: 750;
    line-height: 1.25;
}

.contact-info > p {
    margin-bottom: 2.5rem;
    color: var(--text-secondary);
    font-size: 1.075rem;
}

.qq-groups {
    display: grid;
    gap: 1.25rem;
}

.qq-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 0;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms ease;
}

.qq-group:hover {
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: var(--shadow-md);
    transform: translateX(0.25rem);
}

.group-info {
    min-width: 0;
}

.group-info h3 {
    margin-bottom: 0.35rem;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 700;
}

.group-number {
    margin-bottom: 0.2rem;
    color: var(--primary-color);
    font-weight: 700;
}

.group-desc {
    color: var(--text-light);
    font-size: 0.9rem;
}

.qq-group .btn {
    flex: 0 0 auto;
}

.contact-qr {
    min-width: 0;
}

.qr-code-text {
    padding: clamp(2rem, 3vw, 3rem) 2rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.qr-code-text h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 750;
}

.qr-code-text p {
    margin-block: 0.45rem;
    color: var(--text-secondary);
}

.footer {
    padding-block: clamp(3rem, 5vw, 4.5rem) 2rem;
    color: #d1d5db;
    background: var(--bg-dark);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(2rem, 4vw, 4rem);
    margin-bottom: 2.5rem;
}

.footer-section {
    min-width: 0;
}

.footer-title {
    margin-bottom: 1.25rem;
    color: #ffffff;
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.35;
}

.footer-section > p:not(.footer-title) {
    color: #9ca3af;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.7rem;
    color: #9ca3af;
}

.footer-section li:last-child {
    margin-bottom: 0;
}

.footer-section i {
    width: 1.15rem;
    margin-right: 0.45rem;
    color: var(--primary-color);
    text-align: center;
}

.footer a {
    color: #9ca3af;
    text-decoration: none;
}

.footer a:hover,
.footer a:focus-visible {
    color: #ffffff;
    text-decoration: underline;
}

.footer a:active {
    color: #bfdbfe;
}

.footer a.disabled,
.footer a[disabled],
.footer a[aria-disabled="true"],
.footer a:not([href]) {
    color: #6b7280;
}

.footer-bottom {
    padding-top: 1.75rem;
    color: #9ca3af;
    border-top: 1px solid #374151;
    text-align: center;
}

.footer-bottom p + p {
    margin-top: 0.6rem;
}

.footer-bottom p {
    line-height: 1.8;
}

.footer-bottom a {
    position: relative;
    display: inline-block;
    margin-inline: 0.15rem;
}

.articles-header,
.article-detail {
    padding-top: calc(var(--nav-height) + clamp(2rem, 4vw, 3.5rem));
}

.articles-header {
    padding-bottom: clamp(2.5rem, 4vw, 4rem);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.article-detail {
    padding-bottom: clamp(4rem, 6vw, 7rem);
    background: var(--bg-primary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    min-height: 3rem;
    margin-bottom: clamp(1.75rem, 3vw, 2.5rem);
    padding: 0.65rem 1rem;
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    font-size: 0.9375rem;
    line-height: 1.5;
    overflow: hidden;
}

.breadcrumb ul {
    display: flex;
    align-items: center;
    min-width: 0;
    gap: 0.65rem;
    list-style: none;
    overflow: hidden;
}

.breadcrumb li {
    min-width: 0;
    color: var(--text-secondary);
    white-space: nowrap;
}

.breadcrumb li.current {
    color: var(--text-primary);
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
}

.breadcrumb .separator {
    flex: 0 0 auto;
    color: var(--text-light);
}

.breadcrumb a {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--text-secondary);
    text-decoration: none;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
    color: var(--primary-color);
    text-decoration: none;
}

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

.breadcrumb a.disabled,
.breadcrumb a[disabled],
.breadcrumb a[aria-disabled="true"] {
    color: var(--text-light);
}

.articles-header .section-header {
    margin-bottom: 0;
}

.article-categories {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 1.75rem;
    gap: 0.7rem;
}

.category {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.5rem;
    padding: 0.55rem 1rem;
    color: var(--primary-color);
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(37, 99, 235, 0.28);
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 650;
    text-decoration: none;
}

.category:hover,
.category:focus-visible {
    color: #ffffff;
    background: var(--primary-color);
    border-color: var(--primary-color);
    text-decoration: none;
}

.category:active {
    color: #ffffff;
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.category.disabled,
.category[disabled],
.category[aria-disabled="true"] {
    color: var(--text-light);
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

.articles-list {
    padding-block: clamp(4rem, 6vw, 7rem);
    background: var(--bg-primary);
}

.article-header {
    margin: 0 0 clamp(2rem, 4vw, 3rem);
    text-align: center;
}

.article-header h1 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: clamp(2rem, 3.4vw, 3.25rem);
    font-weight: 780;
    letter-spacing: -0.035em;
    line-height: 1.2;
    overflow-wrap: anywhere;
    text-wrap: balance;
}

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

.article-detail .article-content {
    color: var(--text-primary);
    font-size: clamp(1rem, 1.1vw, 1.075rem);
    line-height: 1.9;
    overflow-wrap: anywhere;
}

.article-detail .article-content > :first-child {
    margin-top: 0;
}

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

.article-detail .article-content p {
    margin: 0 0 1.25rem;
    color: var(--text-primary);
    text-align: justify;
    text-wrap: pretty;
}

.article-detail .article-content .article-summary {
    margin-bottom: 2rem;
    padding: 1.15rem 1.35rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-md);
    font-size: 1.025rem;
    line-height: 1.8;
    text-align: left;
}

.article-detail .article-content .article-summary:empty {
    display: none;
}

.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: 2.2rem 0 1rem;
    color: var(--text-primary);
    font-weight: 750;
    letter-spacing: -0.02em;
    line-height: 1.35;
    overflow-wrap: anywhere;
    text-wrap: balance;
}

.article-detail .article-content h1 {
    font-size: clamp(2rem, 3vw, 2.75rem);
}

.article-detail .article-content h2 {
    padding-bottom: 0.55rem;
    border-bottom: 1px solid var(--border-color);
    font-size: clamp(1.65rem, 2.4vw, 2.2rem);
}

.article-detail .article-content h3 {
    font-size: clamp(1.4rem, 2vw, 1.8rem);
}

.article-detail .article-content h4 {
    font-size: 1.3rem;
}

.article-detail .article-content h5 {
    font-size: 1.15rem;
}

.article-detail .article-content h6 {
    color: var(--text-secondary);
    font-size: 1rem;
    letter-spacing: 0.02em;
}

.article-detail .article-content strong {
    color: var(--text-primary);
    font-weight: 750;
}

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

.article-detail .article-content mark {
    padding: 0.08em 0.28em;
    color: var(--text-primary);
    background: #fef3c7;
    border-radius: 0.2rem;
}

.article-detail .article-content ul,
.article-detail .article-content ol {
    margin: 0 0 1.5rem;
    padding-left: 2rem;
    list-style-position: outside;
}

.article-detail .article-content li {
    display: list-item;
    margin-bottom: 0.45rem;
    padding-left: 0.2rem;
}

.article-detail .article-content ul > li {
    list-style-type: disc;
}

.article-detail .article-content ol > li {
    list-style-type: decimal;
}

.article-detail .article-content ul ul > li {
    list-style-type: circle;
}

.article-detail .article-content ul ul ul > li {
    list-style-type: square;
}

.article-detail .article-content li::marker {
    color: var(--primary-color);
    font-weight: 700;
}

.article-detail .article-content li > ul,
.article-detail .article-content li > ol {
    margin-top: 0.45rem;
    margin-bottom: 0.45rem;
}

.article-detail .article-content img {
    margin: 2rem auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.article-detail .article-content iframe,
.article-detail .article-content video,
.article-detail .article-content embed,
.article-detail .article-content object {
    display: block;
    max-width: 100%;
    margin: 2rem auto;
}

.article-detail .article-content iframe {
    width: 100%;
    border: 0;
}

.article-detail .article-content video {
    width: 100%;
    height: auto;
}

.article-detail .article-content audio {
    width: 100%;
    max-width: 100%;
    margin: 1.5rem 0;
}

.article-detail .article-content hr {
    height: 1px;
    margin: 2.25rem 0;
    background: var(--border-color);
    border: 0;
}

.article-detail .article-content sub,
.article-detail .article-content sup {
    position: relative;
    line-height: 0;
    vertical-align: baseline;
}

.article-detail .article-content sup {
    top: -0.45em;
}

.article-detail .article-content sub {
    bottom: -0.2em;
}

.article-detail .article-content figure {
    max-width: 100%;
    margin: 2rem auto;
}

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

.article-detail .article-content figcaption {
    margin-top: 0.7rem;
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
    text-align: center;
}

.article-detail .article-content table {
    display: block;
    width: 100%;
    max-width: 100%;
    margin: 2rem 0;
    border-collapse: collapse;
    border-spacing: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.article-detail .article-content caption {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 700;
    text-align: left;
}

.article-detail .article-content thead {
    background: var(--bg-secondary);
}

.article-detail .article-content tbody {
    background: var(--bg-primary);
}

.article-detail .article-content th,
.article-detail .article-content td {
    min-width: 8rem;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-color);
    text-align: left;
    vertical-align: top;
}

.article-detail .article-content th {
    color: var(--text-primary);
    font-weight: 750;
    white-space: nowrap;
}

.article-detail .article-content blockquote {
    margin: 2rem 0;
    padding: 1.25rem 1.5rem;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-md);
}

.article-detail .article-content blockquote p {
    color: inherit;
    text-align: left;
}

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

.article-detail .article-content cite {
    display: block;
    margin-top: 0.75rem;
    color: var(--text-light);
    font-size: 0.925rem;
    font-style: normal;
    text-align: left;
}

.article-detail .article-content code {
    padding: 0.14rem 0.35rem;
    color: #b91c1c;
    background: #f3f4f6;
    border-radius: var(--radius-sm);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-size: 0.92em;
    overflow-wrap: anywhere;
}

.article-detail .article-content pre {
    max-width: 100%;
    margin: 2rem 0;
    padding: 1.25rem;
    color: #e5e7eb;
    background: var(--bg-dark);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    line-height: 1.7;
    overflow-x: auto;
    tab-size: 4;
    -webkit-overflow-scrolling: touch;
}

.article-detail .article-content pre code {
    display: block;
    padding: 0;
    color: inherit;
    background: transparent;
    border-radius: 0;
    font-size: inherit;
    white-space: pre;
    overflow-wrap: normal;
}

.article-detail .article-content kbd {
    display: inline-block;
    padding: 0.14rem 0.4rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-bottom-width: 2px;
    border-radius: var(--radius-sm);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    font-size: 0.85em;
    line-height: 1.4;
    white-space: nowrap;
}

.article-detail .article-content details {
    margin: 1.5rem 0;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.article-detail .article-content summary {
    color: var(--text-primary);
    font-weight: 750;
    cursor: pointer;
}

.article-detail .article-content summary:hover {
    color: var(--primary-color);
}

.article-detail .article-content summary:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.35);
    outline-offset: 3px;
    border-radius: 0.2rem;
}

.article-detail .article-content details > *:not(summary) {
    margin-top: 1rem;
}

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

.article-detail .article-content time {
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

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

.article-detail .article-content a:hover,
.article-detail .article-content a:focus-visible {
    color: var(--primary-dark);
}

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

.article-detail .article-content a.disabled,
.article-detail .article-content a[disabled],
.article-detail .article-content a[aria-disabled="true"],
.article-detail .article-content a:not([href]) {
    color: var(--text-light);
    text-decoration: none;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    margin: 2.5rem 0 0;
    gap: 0.6rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    min-height: 2.25rem;
    padding: 0.4rem 0.8rem;
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.18);
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 650;
}

.related-articles {
    margin: clamp(3rem, 5vw, 4.5rem) 0 0;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.related-articles > h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 750;
}

.related-articles .articles-grid {
    grid-template-columns: 1fr;
    gap: 0.85rem;
}

.related-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 0;
    gap: 1.5rem;
    padding: 1rem 1.15rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.related-item:hover,
.related-item:focus-visible {
    color: var(--primary-color);
    background: var(--bg-primary);
    border-color: rgba(37, 99, 235, 0.5);
    box-shadow: var(--shadow-md);
    text-decoration: none;
    transform: translateX(0.2rem);
}

.related-item:active {
    color: var(--primary-dark);
    transform: translateX(0.1rem);
}

.related-item.disabled,
.related-item[disabled],
.related-item[aria-disabled="true"] {
    color: var(--text-light);
    background: var(--bg-secondary);
    border-color: var(--border-color);
    box-shadow: none;
}

.related-title {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.related-date {
    flex: 0 0 auto;
    color: var(--text-light);
    font-size: 0.875rem;
    font-variant-numeric: tabular-nums;
}

.page,
#page {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    min-width: 0;
    margin-top: clamp(2.5rem, 4vw, 4rem);
    gap: 0.5rem;
    color: var(--text-secondary);
    text-align: center;
}

.page ul,
#page ul,
ul.pagination,
ul.page {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    list-style: none;
}

.page li,
#page li,
ul.pagination li,
ul.page li {
    display: flex;
    align-items: center;
    justify-content: center;
    list-style: none;
}

.page a,
.page span,
#page a,
#page span,
ul.pagination a,
ul.pagination span,
ul.page a,
ul.page span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.6rem;
    min-height: 2.6rem;
    padding: 0.45rem 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 650;
    line-height: 1;
    text-decoration: none;
}

.page a:hover,
.page a:focus-visible,
#page a:hover,
#page a:focus-visible,
ul.pagination a:hover,
ul.pagination a:focus-visible,
ul.page a:hover,
ul.page a:focus-visible {
    color: #ffffff;
    background: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

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

.page .active,
.page .current,
#page .active,
#page .current,
ul.pagination .active,
ul.pagination .current,
ul.page .active,
ul.page .current,
.page [aria-current="page"],
#page [aria-current="page"] {
    color: #ffffff;
    background: var(--primary-color);
    border-color: var(--primary-color);
    pointer-events: none;
}

.page li.active > a,
.page li.active > span,
.page li.current > a,
.page li.current > span,
#page li.active > a,
#page li.active > span,
#page li.current > a,
#page li.current > span,
ul.pagination li.active > a,
ul.pagination li.active > span,
ul.pagination li.current > a,
ul.pagination li.current > span,
ul.page li.active > a,
ul.page li.active > span,
ul.page li.current > a,
ul.page li.current > span {
    color: #ffffff;
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.page .disabled,
#page .disabled,
ul.pagination .disabled,
ul.page .disabled,
.page [aria-disabled="true"],
#page [aria-disabled="true"] {
    color: var(--text-light);
    background: var(--bg-secondary);
    border-color: var(--border-color);
    opacity: 0.65;
    cursor: not-allowed;
    pointer-events: none;
    box-shadow: none;
}

.page li.disabled > a,
.page li.disabled > span,
#page li.disabled > a,
#page li.disabled > span,
ul.pagination li.disabled > a,
ul.pagination li.disabled > span,
ul.page li.disabled > a,
ul.page li.disabled > span {
    color: var(--text-light);
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

.progress-bar {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1002;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transform-origin: left center;
    will-change: transform;
}

.back-to-top {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 999;
    display: grid;
    place-items: center;
    width: 3.125rem;
    aspect-ratio: 1;
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: 0;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    cursor: pointer;
    transform: translateY(0.75rem);
    transition: opacity 180ms ease, visibility 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-0.2rem);
}

.back-to-top:active {
    transform: translateY(0);
}

img.loading {
    opacity: 0.45;
    filter: blur(0.2rem);
    transition: opacity 240ms ease, filter 240ms ease;
}

.fade-in {
    opacity: 1;
    transform: none;
}

.motion-ready .fade-in:not(.visible) {
    opacity: 0;
    transform: translateY(1.25rem);
}

.motion-ready .fade-in.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 600ms ease var(--reveal-delay, 0ms), transform 600ms var(--motion-ease) var(--reveal-delay, 0ms);
}

@keyframes backgroundFloat {
    0%,
    100% {
        transform: translate3d(0, 0, 0) rotate(0deg);
    }

    33% {
        transform: translate3d(1.875rem, -1.875rem, 0) rotate(1deg);
    }

    66% {
        transform: translate3d(-1.25rem, 1.25rem, 0) rotate(-1deg);
    }
}

@keyframes triangleRotate {
    0% {
        opacity: 0.3;
        transform: rotate(0deg) translateX(0);
    }

    50% {
        opacity: 0.8;
        transform: rotate(180deg) translateX(1.25rem);
    }

    100% {
        opacity: 0.3;
        transform: rotate(360deg) translateX(0);
    }
}

@keyframes geometricPulse {
    0%,
    100% {
        opacity: 0.5;
        border-radius: 50%;
        transform: scale(1) rotate(0deg);
    }

    25% {
        opacity: 0.8;
        border-radius: 20%;
        transform: scale(1.2) rotate(90deg);
    }

    50% {
        opacity: 0.6;
        border-radius: 0;
        transform: scale(0.8) rotate(180deg);
    }

    75% {
        opacity: 0.7;
        border-radius: 30%;
        transform: scale(1.1) rotate(270deg);
    }
}

@keyframes hexagonFloat {
    0%,
    100% {
        opacity: 0.4;
        transform: translateY(0) rotate(0deg) scale(1);
    }

    33% {
        opacity: 0.7;
        transform: translateY(-1.5rem) rotate(120deg) scale(1.1);
    }

    66% {
        opacity: 0.6;
        transform: translateY(0.9rem) rotate(240deg) scale(0.9);
    }
}

@keyframes lightSweep {
    0% {
        opacity: 0;
        transform: translateX(-10vw) rotate(25deg);
    }

    50% {
        opacity: 0.6;
    }

    100% {
        opacity: 0;
        transform: translateX(110vw) rotate(25deg);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(1.875rem);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 75rem) {
    .features-grid,
    .notice-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .pricing-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1.5rem;
    }

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-0.5rem);
    }
}

@media (max-width: 64rem) {
    .articles-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

    .contact-qr {
        width: min(100%, 34rem);
        margin-inline: auto;
    }
}

@media (max-width: 48rem) {
    :root {
        --nav-height: 4.5rem;
    }

    html {
        scroll-padding-top: calc(var(--nav-height) + 0.75rem);
    }

    .container,
    .nav-container,
    .hero-container {
        width: min(100% - 2rem, var(--container-width));
    }

    .hamburger {
        display: block;
        flex: 0 0 auto;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        z-index: 1;
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        grid-auto-rows: minmax(3.25rem, 1fr);
        justify-content: stretch;
        width: 100%;
        height: calc(100vh - var(--nav-height));
        min-height: 0;
        padding: clamp(0.75rem, 2.5vh, 1.5rem) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
        gap: clamp(0.2rem, 0.8vh, 0.5rem);
        background: rgba(255, 255, 255, 0.86);
        border-top: 1px solid rgba(229, 231, 235, 0.78);
        box-shadow: var(--shadow-lg);
        -webkit-backdrop-filter: blur(18px) saturate(135%);
        backdrop-filter: blur(18px) saturate(135%);
        overflow-y: auto;
        overscroll-behavior: contain;
        visibility: hidden;
        opacity: 0;
        transform: translateY(-0.75rem);
        transition: opacity 200ms ease, visibility 200ms ease, transform 200ms ease;
    }

    .nav-menu.active {
        visibility: visible;
        opacity: 1;
        transform: translateY(0);
    }

    html:not(.js) .navbar {
        position: static;
        height: auto;
    }

    html:not(.js) .nav-container {
        flex-wrap: wrap;
        height: auto;
        padding-block: 0.75rem;
    }

    html:not(.js) .hamburger {
        display: none;
    }

    html:not(.js) .nav-menu {
        position: static;
        grid-auto-rows: auto;
        height: auto;
        min-height: 0;
        padding: 0.5rem 0 0;
        background: transparent;
        border: 0;
        box-shadow: none;
        overflow: visible;
        visibility: visible;
        opacity: 1;
        transform: none;
    }

    .nav-menu li {
        display: flex;
        width: 100%;
        min-height: 0;
    }

    .nav-link {
        display: flex;
        justify-content: center;
        width: 100%;
        min-height: 3.25rem;
        height: 100%;
        padding: 0.65rem 1rem;
        border-radius: var(--radius-sm);
        text-align: center;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link:hover,
    .nav-link:focus-visible {
        background: var(--bg-secondary);
    }

    .hero-intro {
        min-height: auto;
        padding-block: calc(var(--nav-height) + 3.5rem) 4rem;
    }

    .hero-intro::before,
    .hero-intro::after,
    .video-demo::before,
    .video-demo::after,
    .features::before,
    .features::after,
    .pricing::before,
    .pricing::after,
    .articles::after,
    .contact::before,
    .contact::after {
        display: none;
    }

    .hero-stats,
    .features-grid,
    .notice-grid,
    .pricing-grid,
    .articles-grid,
    .footer-content {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        width: min(100%, 26rem);
        gap: 1rem;
    }

    .stat-item {
        padding: 1rem;
        background: rgba(255, 255, 255, 0.5);
        border: 1px solid rgba(229, 231, 235, 0.85);
        border-radius: var(--radius-md);
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: min(100%, 22rem);
    }

    .step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .step:hover {
        transform: translateY(-0.25rem);
    }

    .notice-content > h2 {
        flex-direction: column;
    }

    .qq-group {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .qq-group:hover {
        transform: translateY(-0.2rem);
    }

    .qq-group .btn {
        width: 100%;
    }

    .breadcrumb {
        align-items: flex-start;
        min-height: 2.75rem;
        padding: 0.6rem 0.75rem;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .breadcrumb ul {
        width: max-content;
        min-width: 100%;
        overflow: visible;
    }

    .breadcrumb li.current {
        max-width: 14rem;
    }

    .article-detail .article-content p {
        text-align: left;
    }

    .article-detail .article-content ul,
    .article-detail .article-content ol {
        margin-left: 1rem;
        padding-left: 0.85rem;
    }

    .article-detail .article-content th,
    .article-detail .article-content td {
        min-width: 7rem;
        padding: 0.7rem 0.75rem;
    }

    .related-item {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.45rem;
    }

    .related-title {
        width: 100%;
        white-space: normal;
    }

    .footer {
        text-align: center;
    }

    .footer-section i {
        width: auto;
    }
}

@supports (height: 100dvh) {
    @media (max-width: 48rem) {
        .nav-menu {
            height: calc(100dvh - var(--nav-height));
        }
    }
}

@media (max-width: 32.5rem) {
    .container,
    .nav-container,
    .hero-container {
        width: min(100% - 1.25rem, var(--container-width));
    }

    .nav-logo a {
        gap: 0.5rem;
        font-size: 1.05rem;
    }

    .nav-logo i {
        flex-basis: 1.4rem;
        width: 1.4rem;
        font-size: 1.4rem;
    }

    .hero-badge {
        margin-bottom: 1.5rem;
        padding-inline: 0.9rem;
    }

    .badge-text {
        font-size: 0.78rem;
    }

    .hero-title {
        font-size: 2.15rem;
    }

    .btn {
        width: 100%;
        padding-inline: 1rem;
    }

    .feature-card,
    .pricing-card,
    .notice-item,
    .step,
    .qr-code-text {
        padding: 1.35rem;
    }

    .faq-question {
        padding: 1.1rem;
    }

    .faq-answer {
        padding: 0 1.1rem 1.1rem;
    }

    .article-categories {
        gap: 0.5rem;
    }

    .category {
        min-height: 2.25rem;
        padding: 0.45rem 0.75rem;
        font-size: 0.84rem;
    }

    .article-detail .article-content .article-summary,
    .article-detail .article-content blockquote,
    .article-detail .article-content details,
    .article-detail .article-content pre {
        padding: 1rem;
    }

    .page a,
    .page span,
    #page a,
    #page span,
    ul.pagination a,
    ul.pagination span,
    ul.page a,
    ul.page span {
        min-width: 2.35rem;
        min-height: 2.35rem;
        padding: 0.4rem 0.6rem;
        font-size: 0.84rem;
    }

    .back-to-top {
        right: 1rem;
        bottom: 1rem;
        width: 2.8rem;
    }
}

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

    *,
    *::before,
    *::after {
        scroll-behavior: auto;
        animation-duration: 0.01ms;
        animation-iteration-count: 1;
        transition-duration: 0.01ms;
    }

    .motion-ready .fade-in:not(.visible),
    .motion-ready .fade-in.visible {
        opacity: 1;
        transform: none;
    }
}