* {
    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: #233044;
    background: #f6f8fc;
    line-height: 1.72;
}
body.no-scroll {
    overflow: hidden;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: inherit;
    text-decoration: none;
}
p {
    margin: 0 0 14px;
}
h1, h2, h3 {
    margin: 0;
    line-height: 1.22;
    color: #172033;
}
.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid #e7ebf3;
}
.header-inner {
    width: min(1180px, calc(100% - 28px));
    margin: 0 auto;
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}
.brand,
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    color: #172033;
}
.brand img,
.footer-brand img {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: cover;
}
.nav-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.nav-toggle-label {
    border: 1px solid #dfe5ef;
    border-radius: 999px;
    padding: 8px 14px;
    color: #3558f2;
    font-weight: 700;
    background: #fff;
}
.site-nav {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    display: none;
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 14px;
    background: #fff;
    border: 1px solid #e7ebf3;
    border-radius: 20px;
    box-shadow: 0 18px 36px rgba(42, 55, 88, 0.14);
}
.nav-toggle:checked ~ .site-nav {
    display: grid;
}
.site-nav a {
    padding: 10px 12px;
    color: #5f6b7c;
    border-radius: 12px;
    font-weight: 700;
}
.site-nav a.active,
.site-nav a:hover {
    color: #2980fe;
    background: #eef5ff;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 12px 24px;
    border-radius: 999px;
    background: #2980FE;
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(41, 128, 254, 0.24);
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.download-btn:hover {
    background: #1768E8;
    transform: translateY(-2px);
    box-shadow: 0 18px 34px rgba(23, 104, 232, 0.28);
}
.connection-workspace-hero {
    background: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    padding: 46px 0 42px;
    color: #fff;
    overflow: hidden;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
    align-items: center;
}
.hero-copy h1 {
    color: #fff;
    font-size: clamp(34px, 8vw, 64px);
    letter-spacing: -1.6px;
    margin-bottom: 16px;
}
.hero-copy p {
    color: rgba(255, 255, 255, .88);
    font-size: 17px;
    max-width: 680px;
}
.hero-tags,
.inline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0 24px;
}
.hero-tags span,
.inline-tags span,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
    font-weight: 700;
    font-size: 14px;
}
.badge {
    background: #eef5ff;
    color: #2980fe;
}
.hero-visual {
    position: relative;
    min-height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-device {
    width: min(390px, 86vw);
    border-radius: 34px;
    box-shadow: 0 28px 70px rgba(20, 26, 52, 0.28);
}
.status-panel {
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(255, 255, 255, .7);
    box-shadow: 0 20px 50px rgba(31, 38, 67, .18);
    border-radius: 24px;
    padding: 18px;
    color: #172033;
}
.hero-status {
    position: relative;
    margin-top: -28px;
    width: min(330px, 92%);
}
.status-line {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid #eef1f6;
}
.status-line:last-child {
    border-bottom: 0;
}
.status-line strong {
    color: #162238;
}
.status-pill {
    color: #1a8f57;
    background: #eafaf2;
    border-radius: 999px;
    padding: 5px 10px;
    font-weight: 800;
    font-size: 13px;
}
.hero-chip {
    position: absolute;
    right: 4px;
    top: 8px;
    background: #fff;
    color: #2980fe;
    border-radius: 999px;
    padding: 8px 12px;
    box-shadow: 0 16px 36px rgba(27, 38, 70, .18);
    font-weight: 800;
}
.section {
    padding: 58px 0;
}
.section-muted {
    background: #eef3fa;
}
.section-head {
    display: grid;
    gap: 12px;
    margin-bottom: 24px;
}
.section-head.center {
    text-align: center;
    max-width: 760px;
    margin-left: auto;
    margin-right: auto;
}
.section-head h2 {
    font-size: clamp(26px, 5vw, 42px);
}
.section-head p {
    color: #667389;
    font-size: 16px;
}
.quick-task-entries {
    margin-top: -28px;
    position: relative;
    z-index: 5;
}
.quick-task-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
.task-card,
.capability-card,
.info-card,
.risk-card,
.faq-item,
.step-card {
    background: #fff;
    border: 1px solid #e6ebf3;
    border-radius: 24px;
    padding: 22px;
    box-shadow: 0 12px 30px rgba(48, 60, 90, .06);
}
.task-card .label,
.capability-card .label {
    color: #2980fe;
    font-weight: 800;
    font-size: 13px;
}
.task-card h3,
.capability-card h3,
.info-card h3,
.risk-card h3,
.step-card h3 {
    margin: 8px 0 10px;
}
.card-link {
    display: inline-flex;
    margin-top: 8px;
    color: #2980fe;
    font-weight: 800;
}
.connection-capability-overview {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
.capability-card.featured {
    background: linear-gradient(135deg, #ffffff 0%, #eef5ff 100%);
}
.feature-section,
.quick-connect-section,
.encrypted-tunnel-section,
.route-optimization-section,
.device-protection-section,
.data-boundary-section,
.usage-scenarios-section,
.connection-checkup-section {
    background: #fff;
    border: 1px solid #e6ebf3;
    border-radius: 32px;
    padding: 24px;
    box-shadow: 0 18px 46px rgba(48, 60, 90, .07);
}
.split-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    align-items: center;
}
.feature-image-wrap {
    background: linear-gradient(135deg, #eef5ff, #f6efff);
    border-radius: 28px;
    padding: 18px;
}
.feature-image-wrap img {
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(43, 52, 84, .12);
}
.check-list {
    display: grid;
    gap: 10px;
    padding: 0;
    margin: 18px 0;
    list-style: none;
}
.check-list li {
    position: relative;
    padding-left: 24px;
    color: #4d5b6f;
}
.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .68em;
    width: 9px;
    height: 9px;
    border-radius: 99px;
    background: #2980fe;
}
.safety-panel {
    background: #f7faff;
    border: 1px solid #dfeaff;
    border-radius: 26px;
    padding: 20px;
}
.panel-grid,
.card-grid,
.risk-grid,
.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
.route-status-box {
    background: #f7faff;
    border: 1px solid #dfeaff;
    border-radius: 24px;
    padding: 18px;
}
.progress-line {
    height: 10px;
    background: #e7edf7;
    border-radius: 999px;
    overflow: hidden;
    margin: 12px 0;
}
.progress-line span {
    display: block;
    width: 72%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #3558F2, #7B4EF1);
}
.process-steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    counter-reset: steps;
}
.step-card {
    position: relative;
    padding-left: 74px;
}
.step-card::before {
    counter-increment: steps;
    content: counter(steps, decimal-leading-zero);
    position: absolute;
    left: 20px;
    top: 22px;
    width: 38px;
    height: 38px;
    border-radius: 15px;
    display: grid;
    place-items: center;
    background: #eef5ff;
    color: #2980fe;
    font-weight: 900;
}
.risk-card {
    border-left: 4px solid #2980fe;
}
.risk-card .suggestion {
    color: #2980fe;
    font-weight: 800;
}
.faq-item h3 {
    font-size: 18px;
    margin-bottom: 10px;
}
.cta-section {
    padding: 62px 0;
}
.cta-card {
    border-radius: 34px;
    padding: 34px 24px;
    text-align: center;
    color: #fff;
    background: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    box-shadow: 0 22px 52px rgba(66, 70, 160, .18);
}
.cta-card h2 {
    color: #fff;
    font-size: clamp(26px, 5vw, 42px);
    margin-bottom: 12px;
}
.cta-card p {
    color: rgba(255, 255, 255, .86);
    max-width: 720px;
    margin: 0 auto 20px;
}
.page-hero {
    padding: 48px 0 30px;
    background: linear-gradient(180deg, #ffffff 0%, #eef3fa 100%);
}
.simple-hero .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}
.page-hero h1 {
    font-size: clamp(32px, 7vw, 56px);
    letter-spacing: -1.2px;
}
.page-hero p {
    max-width: 780px;
    color: #667389;
    font-size: 17px;
}
.article-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}
.article-body {
    background: #fff;
    border: 1px solid #e6ebf3;
    border-radius: 30px;
    padding: 24px;
    box-shadow: 0 18px 42px rgba(48, 60, 90, .06);
}
.article-body h2 {
    margin: 24px 0 12px;
}
.article-body h2:first-child {
    margin-top: 0;
}
.article-body p {
    color: #4d5b6f;
}
.sidebar-panel {
    background: #f7faff;
    border: 1px solid #dfeaff;
    border-radius: 26px;
    padding: 20px;
    align-self: start;
}
.sidebar-panel h3 {
    margin-bottom: 12px;
}
.sidebar-panel a {
    display: block;
    color: #2980fe;
    font-weight: 800;
    padding: 8px 0;
}
.download-panel {
    text-align: center;
    background: #fff;
    border: 1px solid #e6ebf3;
    border-radius: 30px;
    padding: 28px;
    box-shadow: 0 18px 42px rgba(48, 60, 90, .06);
}
.download-steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    margin-top: 22px;
}
.site-footer {
    background: #172033;
    color: #c8d0df;
    padding: 48px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}
.footer-brand span,
.site-footer h3 {
    color: #fff;
}
.site-footer a {
    display: block;
    color: #c8d0df;
    margin: 8px 0;
}
.site-footer a:hover {
    color: #fff;
}
.footer-bottom {
    margin-top: 30px;
    border-top: 1px solid rgba(255,255,255,.1);
    text-align: center;
    padding: 18px;
    color: #9da9bb;
}
@media (min-width: 680px) {
    .quick-task-grid,
    .card-grid,
    .risk-grid,
    .download-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    .connection-capability-overview {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    .panel-grid,
    .faq-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (min-width: 980px) {
    .nav-toggle-label {
        display: none;
    }
    .site-nav {
        position: static;
        display: flex;
        align-items: center;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        gap: 4px;
    }
    .site-nav a {
        font-size: 14px;
        padding: 9px 10px;
    }
    .connection-workspace-hero {
        padding: 68px 0 76px;
    }
    .hero-grid {
        grid-template-columns: 1.03fr .97fr;
        gap: 44px;
    }
    .hero-status {
        position: absolute;
        left: 0;
        bottom: 10px;
        margin: 0;
    }
    .quick-task-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .connection-capability-overview {
        grid-template-columns: repeat(4, 1fr);
        grid-auto-rows: minmax(180px, auto);
    }
    .capability-card.featured {
        grid-column: span 2;
    }
    .split-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 34px;
    }
    .feature-section,
    .quick-connect-section,
    .encrypted-tunnel-section,
    .route-optimization-section,
    .device-protection-section,
    .data-boundary-section,
    .usage-scenarios-section,
    .connection-checkup-section {
        padding: 36px;
    }
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .risk-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .process-steps {
        grid-template-columns: repeat(3, 1fr);
    }
    .article-layout {
        grid-template-columns: minmax(0, 1fr) 300px;
        align-items: start;
    }
    .footer-grid {
        grid-template-columns: 1.4fr .8fr .8fr .8fr;
    }
    .simple-hero .container {
        grid-template-columns: 1fr 300px;
        align-items: center;
    }
}
@media (min-width: 1180px) {
    .site-nav a {
        padding: 10px 13px;
    }
}