:root {
    --bg: #f5f7ff;
    --surface: rgba(255, 255, 255, 0.88);
    --surface-strong: #ffffff;
    --text: #152042;
    --muted: #5e688a;
    --border: rgba(103, 91, 255, 0.14);
    --primary: #3758ff;
    --secondary: #7a3dff;
    --accent: #8aa2ff;
    --shadow: 0 24px 60px rgba(38, 53, 124, 0.16);
    --radius: 26px;
    --container: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(122, 61, 255, 0.22), transparent 30%),
        radial-gradient(circle at top right, rgba(55, 88, 255, 0.18), transparent 32%),
        linear-gradient(180deg, #f8f9ff 0%, #eef2ff 50%, #f7f8ff 100%);
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: min(var(--container), calc(100% - 48px));
    margin: 0 auto;
}

.narrow {
    width: min(860px, calc(100% - 48px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    backdrop-filter: blur(18px);
    background: rgba(247, 249, 255, 0.82);
    border-bottom: 1px solid rgba(103, 91, 255, 0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 82px;
}

.site-brand {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.02em;
}

.site-brand img,
.footer-logo img {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    box-shadow: 0 12px 24px rgba(55, 88, 255, 0.18);
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

.site-nav a {
    padding: 10px 16px;
    border-radius: 999px;
    font-size: 0.96rem;
    color: var(--muted);
    transition: 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: 0 14px 30px rgba(74, 74, 200, 0.28);
}

.page-shell {
    overflow: hidden;
}

.hero {
    position: relative;
    padding: 88px 0 56px;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 18px 0 auto;
    height: 520px;
    background:
        radial-gradient(circle at 20% 20%, rgba(122, 61, 255, 0.2), transparent 28%),
        radial-gradient(circle at 80% 10%, rgba(55, 88, 255, 0.24), transparent 30%);
    pointer-events: none;
}

.hero-grid,
.split-grid {
    position: relative;
    display: grid;
    gap: 34px;
    align-items: stretch;
}

.hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
}

.split-grid {
    grid-template-columns: 1fr 1fr;
}

.hero-copy h1,
.hero-inner h1 {
    margin: 0 0 18px;
    font-size: clamp(2.3rem, 5vw, 4.5rem);
    line-height: 1.04;
    letter-spacing: -0.04em;
}

.hero-copy p,
.hero-inner p,
.lead {
    margin: 0 0 18px;
    color: var(--muted);
    font-size: 1.06rem;
    line-height: 1.9;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 18px;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.74);
    border: 1px solid rgba(103, 91, 255, 0.12);
    color: var(--secondary);
    font-weight: 700;
    font-size: 0.92rem;
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin: 28px 0 30px;
}

.cta-row.center {
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 156px;
    padding: 14px 24px;
    border-radius: 999px;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: 0 18px 34px rgba(72, 71, 208, 0.26);
}

.btn-secondary {
    color: var(--primary);
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(103, 91, 255, 0.14);
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.hero-metrics div,
.info-card,
.price-card,
.article-card,
.list-card,
.download-card,
.glass-card,
.mini-card,
.large-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero-metrics div {
    padding: 18px 20px;
}

.hero-metrics strong {
    display: block;
    margin-bottom: 6px;
    font-size: 1.3rem;
}

.hero-metrics span {
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.6;
}

.glass-card,
.gradient-panel {
    height: 100%;
}

.glass-card {
    padding: 28px;
}

.glass-card h2,
.section-heading h2,
.download-card h2,
.large-card h2 {
    margin: 0 0 14px;
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    line-height: 1.2;
}

.feature-points {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
    line-height: 1.85;
}

.status-box {
    margin-top: 22px;
    padding: 18px 20px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(55, 88, 255, 0.12), rgba(122, 61, 255, 0.12));
}

.status-box span {
    display: block;
    margin-bottom: 8px;
    color: var(--secondary);
    font-size: 0.9rem;
    font-weight: 700;
}

.status-box strong {
    font-size: 1.04rem;
}

.section {
    padding: 34px 0 58px;
}

.section-alt {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0.62));
}

.section-heading {
    margin-bottom: 24px;
    text-align: center;
}

.section-heading.left {
    text-align: left;
}

.section-heading p {
    color: var(--muted);
}

.card-grid {
    display: grid;
    gap: 22px;
}

.three-up,
.pricing-grid,
.article-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card,
.price-card,
.article-card,
.download-card,
.list-card,
.large-card {
    padding: 28px;
}

.info-card h3,
.price-card h3,
.article-card h3,
.list-card h2 {
    margin: 0 0 12px;
    font-size: 1.28rem;
}

.info-card p,
.price-card p,
.article-card p,
.list-card p,
.download-card p,
.large-card p {
    margin: 0;
    color: var(--muted);
    line-height: 1.85;
}

.stack-list {
    display: grid;
    gap: 18px;
}

.stack-item {
    padding: 20px 22px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid var(--border);
}

.stack-item h3 {
    margin: 0 0 10px;
}

.stack-item p {
    margin: 0;
    color: var(--muted);
    line-height: 1.8;
}

.gradient-panel {
    display: grid;
    gap: 18px;
    padding: 24px;
    border-radius: 32px;
    background: linear-gradient(160deg, rgba(49, 91, 255, 0.96), rgba(117, 74, 255, 0.92));
    color: #fff;
}

.mini-card {
    padding: 22px;
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.14);
    box-shadow: none;
}

.mini-card span {
    display: block;
    margin-bottom: 8px;
    opacity: 0.82;
}

.mini-card strong {
    display: block;
    line-height: 1.75;
}

.price-card {
    text-align: center;
}

.price-card strong {
    display: block;
    margin-bottom: 14px;
    font-size: 2.2rem;
}

.price-card .btn {
    margin-top: 20px;
}

.price-card.featured {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(244, 241, 255, 0.95));
    transform: translateY(-8px);
}

.article-date,
.article-meta {
    display: inline-block;
    margin-bottom: 12px;
    color: var(--secondary);
    font-size: 0.92rem;
    font-weight: 700;
}

.article-card h3 a,
.list-card h2 a {
    transition: color 0.2s ease;
}

.article-card h3 a:hover,
.list-card h2 a:hover,
.text-link:hover {
    color: var(--primary);
}

.section-action {
    margin-top: 28px;
    text-align: center;
}

.hero-inner {
    padding: 92px 0 34px;
    text-align: center;
}

.article-list {
    display: grid;
    gap: 20px;
}

.text-link {
    display: inline-block;
    margin-top: 14px;
    color: var(--primary);
    font-weight: 700;
}

.pagination {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 10px;
}

.pagination a {
    min-width: 42px;
    padding: 10px 14px;
    border-radius: 999px;
    text-align: center;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid var(--border);
    color: var(--muted);
}

.pagination a.active {
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.article-detail {
    width: min(900px, calc(100% - 48px));
}

.article-detail p {
    margin: 0 0 18px;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 2;
}

.download-card.highlight {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(242, 239, 255, 0.95));
}

.site-footer {
    padding: 44px 0 28px;
    background: #12183d;
    color: rgba(255, 255, 255, 0.88);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 0.8fr;
    gap: 24px;
}

.footer-block {
    display: grid;
    gap: 10px;
}

.footer-block h3 {
    margin: 0 0 6px;
    font-size: 1rem;
}

.footer-block a,
.friend-links a,
.footer-copy,
.footer-brand p,
.friend-links em {
    color: rgba(255, 255, 255, 0.68);
}

.footer-brand p {
    line-height: 1.85;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    font-size: 1.2rem;
    font-weight: 800;
}

.friend-links {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
}

.friend-links__items {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-copy {
    margin-top: 18px;
    font-size: 0.9rem;
}

.floating-contact {
    position: fixed;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 40;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    box-shadow: 0 20px 34px rgba(65, 71, 209, 0.3);
}

.floating-contact__icon {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.16);
    font-weight: 800;
}

.floating-contact__text {
    white-space: nowrap;
    font-weight: 700;
}

@media (max-width: 1080px) {
    .hero-grid,
    .split-grid,
    .footer-grid,
    .three-up,
    .pricing-grid,
    .article-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 820px) {
    .container,
    .narrow,
    .article-detail {
        width: min(100% - 28px, var(--container));
    }

    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 0;
    }

    .site-nav {
        justify-content: flex-start;
    }

    .hero {
        padding-top: 56px;
    }

    .hero-copy h1,
    .hero-inner h1 {
        font-size: 2.25rem;
    }

    .hero-metrics {
        grid-template-columns: 1fr;
    }

    .floating-contact {
        right: 10px;
        padding: 12px 14px;
    }

    .floating-contact__text {
        display: none;
    }
}