:root {
    --bg-top: #eef4ff;
    --bg-bottom: #f7f8ff;
    --surface: rgba(255, 255, 255, 0.9);
    --surface-strong: rgba(255, 255, 255, 0.97);
    --text: #161d43;
    --muted: #5b6791;
    --line: rgba(84, 101, 232, 0.15);
    --blue: #2f6bff;
    --purple: #834cff;
    --shadow: 0 24px 70px rgba(35, 46, 137, 0.14);
    --radius-lg: 26px;
    --radius-md: 18px;
    --container: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--text);
    font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at 10% 12%, rgba(131, 76, 255, 0.16), transparent 24%),
        radial-gradient(circle at 84% 6%, rgba(47, 107, 255, 0.18), transparent 26%),
        linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 52%, #ffffff 100%);
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
p { margin: 0 0 16px; }

.container { width: min(var(--container), calc(100% - 48px)); margin: 0 auto; }
.narrow { width: min(920px, calc(100% - 48px)); margin: 0 auto; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(246, 248, 255, 0.84);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(108, 124, 232, 0.1);
}

.header-inner {
    min-height: 88px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.site-brand,
.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    font-size: 1.22rem;
    font-weight: 800;
}

.site-brand img,
.footer-logo img {
    width: 52px;
    height: 52px;
    border-radius: 15px;
    box-shadow: 0 16px 34px rgba(61, 81, 218, 0.24);
}

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

.site-nav a {
    padding: 10px 16px;
    border-radius: 999px;
    color: var(--muted);
    transition: .2s ease;
}

.site-nav a:hover,
.site-nav a.active {
    color: #fff;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    box-shadow: 0 15px 28px rgba(77, 74, 213, 0.24);
}

.page-shell { overflow: hidden; }

.hero {
    position: relative;
    padding: 92px 0 60px;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 50%;
    width: min(920px, 72vw);
    height: 460px;
    transform: translateX(-50%);
    border-radius: 50%;
    background: radial-gradient(circle, rgba(89, 106, 255, 0.2) 0%, rgba(89, 106, 255, 0.05) 46%, transparent 74%);
    filter: blur(12px);
    pointer-events: none;
}

.inner-hero { padding-bottom: 24px; }

.hero-grid,
.split-grid,
.story-grid,
.download-grid,
.contact-grid,
.feature-grid,
.pricing-grid,
.stats-grid,
.footer-grid,
.hero-metrics,
.article-grid {
    display: grid;
    gap: 22px;
}

.hero-grid { grid-template-columns: 1.15fr .85fr; align-items: stretch; }
.split-grid,
.download-grid,
.contact-grid,
.story-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.feature-grid,
.pricing-grid,
.stats-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.article-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.article-grid-list { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.hero-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.hero-copy,
.hero-inner { position: relative; z-index: 1; }

.hero-copy h1,
.hero-inner h1 {
    margin: 0 0 18px;
    font-size: clamp(2.5rem, 5vw, 4.8rem);
    line-height: 1.04;
    letter-spacing: -0.045em;
}

.hero-inner { text-align: center; }
.hero-inner h1 { font-size: clamp(2.1rem, 4vw, 4rem); }

.hero-copy p,
.hero-inner p,
.feature-card p,
.price-card p,
.article-card p,
.glass-panel p,
.contact-card p,
.download-card p,
.large-card p,
.site-footer p,
.article-detail p,
.article-detail li,
.stat-card span {
    color: var(--muted);
    line-height: 1.9;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    margin-bottom: 18px;
    padding: 8px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(120, 98, 240, 0.14);
    color: var(--purple);
    font-size: 0.92rem;
    font-weight: 700;
}

.btn {
    min-width: 160px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    border-radius: 999px;
    font-weight: 700;
    transition: transform .2s ease, box-shadow .2s ease;
}

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

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    box-shadow: 0 18px 34px rgba(71, 62, 217, 0.28);
}

.btn-secondary {
    color: var(--blue);
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(73, 92, 218, 0.14);
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    column-gap: 18px;
    row-gap: 14px;
    align-items: center;
    margin: 28px 0 0;
}

.cta-row .btn {
    margin: 0;
}

.hero-copy .cta-row {
    gap: 14px;
    column-gap: 18px;
    justify-content: flex-start;
    margin-bottom: 34px;
}

.hero-copy .cta-row .btn {
    min-width: 180px;
}

.cta-row.compact,
.center-action,
.article-bottom-action { justify-content: center; text-align: center; }

.center-action,
.article-bottom-action { margin-top: 28px; }

.accent-panel,
.glass-panel,
.feature-card,
.price-card,
.article-card,
.download-card,
.contact-card,
.stat-card,
.large-card,
.article-detail {
    border: 1px solid var(--line);
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.accent-panel,
.glass-panel,
.feature-card,
.price-card,
.article-card,
.download-card,
.contact-card,
.stat-card,
.large-card {
    padding: 28px;
}

.accent-panel {
    display: grid;
    gap: 18px;
    color: #fff;
    background: linear-gradient(160deg, rgba(41, 91, 255, 0.98), rgba(124, 74, 255, 0.96));
}

.mini-card {
    padding: 22px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.1);
}

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

.status-box {
    padding: 18px 20px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.14);
}

.section { padding: 42px 0 68px; }
.section-soft { background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.46)); }

.section-heading { margin-bottom: 28px; text-align: center; }
.section-heading.left { text-align: left; }

.section-heading h2,
.glass-panel h2,
.download-card h2,
.large-card h2 {
    margin: 0 0 14px;
    font-size: clamp(1.6rem, 3vw, 2.28rem);
    line-height: 1.18;
}

.feature-card h3,
.price-card h3,
.article-card h3,
.contact-card h3 {
    margin: 0 0 12px;
    font-size: 1.24rem;
    line-height: 1.35;
}

.feature-list,
.price-card ul,
.article-detail ul {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
    line-height: 1.9;
}

.stat-card strong {
    display: block;
    margin-bottom: 8px;
    font-size: 1.7rem;
}

.price-card { text-align: center; }
.price-card strong {
    display: block;
    margin-bottom: 12px;
    font-size: 2.4rem;
}

.price-card.featured {
    transform: translateY(-10px);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.99), rgba(245, 241, 255, 0.98));
}

.badge {
    display: inline-flex;
    margin-bottom: 12px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(108, 78, 255, 0.12);
    color: var(--purple);
    font-size: 0.9rem;
    font-weight: 700;
}

.article-meta {
    margin-bottom: 12px;
    color: var(--purple);
    font-size: 0.9rem;
    font-weight: 700;
}

.center-meta { margin-top: 8px; }

.text-link {
    display: inline-flex;
    margin-top: 8px;
    color: var(--blue);
    font-weight: 700;
}

.article-detail {
    padding: 38px;
    background: var(--surface-strong);
}

.article-detail h2 {
    margin: 28px 0 14px;
    font-size: 1.56rem;
}

.pagination {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 30px;
}

.pagination a {
    min-width: 44px;
    padding: 10px 14px;
    text-align: center;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--line);
    color: var(--muted);
}

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

.site-footer {
    padding: 26px 0 32px;
    background: rgba(244, 247, 255, 0.9);
    border-top: 1px solid rgba(106, 122, 230, 0.1);
}

.footer-grid {
    grid-template-columns: 1.35fr .8fr .8fr;
    align-items: start;
}

.footer-block h3 {
    margin: 0 0 14px;
    font-size: 1rem;
}

.footer-block a {
    display: block;
    margin-bottom: 10px;
    color: var(--muted);
}

.friend-links {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px dashed rgba(96, 115, 230, 0.18);
    color: var(--muted);
}

.friend-links span {
    flex: 0 0 auto;
    font-weight: 700;
}

.friend-links__items {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 18px;
}

.friend-links__items em {
    font-style: normal;
    opacity: 0.8;
}

.footer-copy {
    margin-top: 16px;
    color: var(--muted);
    font-size: 0.92rem;
}

.floating-contact {
    position: fixed;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 80;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 999px;
    color: #fff;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    box-shadow: 0 20px 40px rgba(69, 66, 206, 0.32);
}

.floating-contact__icon {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.16);
    font-weight: 700;
}

@media (max-width: 1120px) {
    .hero-grid,
    .split-grid,
    .story-grid,
    .download-grid,
    .contact-grid,
    .feature-grid,
    .pricing-grid,
    .stats-grid,
    .footer-grid,
    .article-grid,
    .article-grid-list,
    .hero-metrics {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 760px) {
    .container,
    .narrow { width: min(100% - 28px, var(--container)); }

    .header-inner {
        min-height: auto;
        padding: 18px 0;
        align-items: flex-start;
        flex-direction: column;
    }

    .hero,
    .section {
        padding-top: 34px;
        padding-bottom: 42px;
    }

    .hero-grid,
    .split-grid,
    .story-grid,
    .download-grid,
    .contact-grid,
    .feature-grid,
    .pricing-grid,
    .stats-grid,
    .footer-grid,
    .article-grid,
    .article-grid-list,
    .hero-metrics {
        grid-template-columns: 1fr;
    }

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

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

    .floating-contact__text { display: none; }

    .friend-links {
        flex-direction: column;
        gap: 10px;
    }

    .article-detail { padding: 24px; }
}