:root {
    --primary: rgb(70,139,223);
    --primary-dark: #2569bd;
    --primary-soft: #edf6ff;
    --primary-light: #d9ecff;
    --text: #142033;
    --muted: #65738a;
    --border: #dce8f7;
    --card: #ffffff;
    --bg: #f6fbff;
    --shadow: 0 18px 50px rgba(34, 95, 165, 0.10);
    --radius: 22px;
}
* {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #f4faff 0%, #ffffff 38%, #f6fbff 100%);
    line-height: 1.75;
    font-size: 16px;
    overflow-x: hidden;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
.container {
    width: min(100% - 32px, 1160px);
    margin: 0 auto;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(220,232,247,0.8);
}
.header-inner {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: 0.3px;
    color: #102846;
}
.logo img {
    width: 38px;
    height: 38px;
    border-radius: 12px;
}
.nav-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.nav-toggle-label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: var(--primary-soft);
    cursor: pointer;
}
.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--primary-dark);
    border-radius: 99px;
    position: relative;
    content: "";
}
.nav-toggle-label span::before {
    position: absolute;
    top: -7px;
}
.nav-toggle-label span::after {
    position: absolute;
    top: 7px;
}
.main-nav {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    display: none;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
}
.main-nav a {
    display: block;
    padding: 12px 14px;
    border-radius: 12px;
    color: #27415f;
    font-weight: 600;
}
.main-nav a:hover {
    background: var(--primary-soft);
    color: var(--primary-dark);
}
.nav-toggle:checked ~ .main-nav {
    display: block;
}
.hero {
    padding: 54px 0 36px;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    align-items: center;
}
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(70,139,223,0.11);
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 700;
}
h1, h2, h3 {
    line-height: 1.25;
    color: #102846;
    margin: 0 0 14px;
}
h1 {
    font-size: clamp(32px, 7vw, 58px);
    letter-spacing: -1.5px;
}
h2 {
    font-size: clamp(25px, 4.6vw, 38px);
    letter-spacing: -0.7px;
}
h3 {
    font-size: 20px;
}
p {
    margin: 0 0 16px;
    color: var(--muted);
}
.hero-description {
    font-size: 18px;
    color: #415570;
    max-width: 680px;
}
.badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 22px 0 28px;
}
.badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.82);
    border-radius: 999px;
    color: #35546f;
    font-size: 14px;
    font-weight: 650;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    min-width: 150px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 34px rgba(70,139,223,0.28);
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 18px 40px rgba(70,139,223,0.33);
}
.hero-visual {
    position: relative;
    padding: 20px;
    border-radius: 30px;
    background: linear-gradient(145deg, #fafdff 0%, #e7f4ff 100%);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.hero-visual::before,
.hero-visual::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    background: rgba(70,139,223,0.12);
    filter: blur(3px);
}
.hero-visual::before {
    width: 86px;
    height: 86px;
    right: 22px;
    top: 18px;
}
.hero-visual::after {
    width: 130px;
    height: 130px;
    left: 18px;
    bottom: 16px;
}
.hero-visual img {
    position: relative;
    z-index: 1;
    margin: 0 auto;
    border-radius: 28px;
    max-height: 520px;
    object-fit: contain;
}
.section {
    padding: 54px 0;
}
.section-header {
    max-width: 760px;
    margin-bottom: 24px;
}
.section-header.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}
.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 34px rgba(50,99,145,0.07);
}
.card.soft {
    background: linear-gradient(180deg, #ffffff 0%, #f2f8ff 100%);
}
.card-icon {
    width: 46px;
    height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-size: 22px;
    margin-bottom: 12px;
}
.split {
    display: grid;
    grid-template-columns: 1fr;
    gap: 22px;
    align-items: center;
}
.info-list {
    display: grid;
    gap: 12px;
    padding: 0;
    margin: 0;
    list-style: none;
}
.info-list li {
    padding: 14px 16px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid var(--border);
    color: #415570;
}
.stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 22px;
}
.stat {
    padding: 18px;
    border-radius: 20px;
    background: #fff;
    border: 1px solid var(--border);
}
.stat strong {
    display: block;
    color: var(--primary-dark);
    font-size: 25px;
}
.faq-list {
    display: grid;
    gap: 14px;
}
.faq-item {
    padding: 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: 0 10px 28px rgba(50,99,145,0.06);
}
.faq-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
}
.page-hero {
    padding: 48px 0 24px;
}
.page-hero .card {
    background: linear-gradient(135deg, #ffffff 0%, #eef7ff 100%);
}
.article {
    max-width: 880px;
    margin: 0 auto;
}
.article .download-btn {
    margin-top: 12px;
}
.callout {
    border-left: 4px solid var(--primary);
    background: var(--primary-soft);
    padding: 18px;
    border-radius: 18px;
    color: #385570;
    margin: 22px 0;
}
.steps {
    counter-reset: step;
    list-style: none;
    padding: 0;
    margin: 20px 0 0;
    display: grid;
    gap: 14px;
}
.steps li {
    counter-increment: step;
    position: relative;
    padding: 18px 18px 18px 62px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--border);
}
.steps li::before {
    content: counter(step);
    position: absolute;
    left: 18px;
    top: 18px;
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}
.cta-panel {
    padding: 28px;
    border-radius: 26px;
    background: linear-gradient(135deg, rgba(70,139,223,0.14), rgba(255,255,255,0.92));
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.site-footer {
    margin-top: 48px;
    padding: 44px 0 24px;
    background: #102846;
    color: #d7e7f8;
}
.site-footer p,
.site-footer a,
.footer-bottom {
    color: #b7cbe2;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}
.footer-logo {
    color: #fff;
    font-size: 22px;
    font-weight: 850;
    margin-bottom: 10px;
}
.site-footer h3 {
    color: #fff;
    font-size: 16px;
}
.site-footer a {
    display: block;
    padding: 4px 0;
}
.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: 28px;
    padding-top: 18px;
    font-size: 14px;
}
@media (min-width: 720px) {
    .container {
        width: min(100% - 48px, 1160px);
    }
    .grid,
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stats {
        grid-template-columns: repeat(4, 1fr);
    }
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}
@media (min-width: 980px) {
    body {
        font-size: 17px;
    }
    .nav-toggle-label {
        display: none;
    }
    .main-nav {
        position: static;
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
    }
    .main-nav a {
        padding: 10px 12px;
    }
    .hero {
        padding: 80px 0 58px;
    }
    .hero-grid {
        grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
        gap: 58px;
    }
    .feature-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .split {
        grid-template-columns: 1fr 1fr;
        gap: 42px;
    }
    .section {
        padding: 72px 0;
    }
    .page-hero {
        padding: 66px 0 34px;
    }
    .card {
        padding: 28px;
    }
}