* {
    box-sizing: border-box;
}

:root {
    --gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue: #2980FE;
    --blue-dark: #1768E8;
    --text: #1F2937;
    --muted: #667085;
    --soft: #F5F7FB;
    --line: #E5EAF2;
    --card: #FFFFFF;
    --deep: #111827;
    --radius-lg: 30px;
    --radius-md: 22px;
    --shadow: 0 18px 45px rgba(18, 35, 85, 0.10);
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background: #FFFFFF;
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid rgba(229, 234, 242, 0.9);
    backdrop-filter: blur(12px);
}

.header-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    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;
    color: #182033;
    letter-spacing: -0.02em;
}

.logo img {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: cover;
}

.nav-toggle {
    border: 1px solid var(--line);
    background: #FFFFFF;
    color: var(--text);
    border-radius: 999px;
    padding: 9px 14px;
    font-size: 14px;
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    padding: 12px;
    background: #FFFFFF;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
    display: none;
    flex-direction: column;
    gap: 4px;
}

.site-nav.open {
    display: flex;
}

.site-nav a {
    padding: 10px 12px;
    border-radius: 14px;
    color: #435166;
    font-size: 14px;
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--blue);
    background: #EFF6FF;
}

main {
    background: #FFFFFF;
}

.content-container,
.section-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.section {
    padding: 60px 0;
}

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

.eyebrow,
.category-badge,
.label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 999px;
    padding: 6px 12px;
    color: var(--blue);
    background: #EFF6FF;
    border: 1px solid #D6E7FF;
    font-size: 13px;
    font-weight: 700;
}

.section-heading h2,
.page-title h1 {
    margin: 12px 0 10px;
    color: var(--deep);
    line-height: 1.18;
    letter-spacing: -0.04em;
}

.section-heading h2 {
    font-size: clamp(28px, 5vw, 44px);
}

.section-heading p,
.page-title p {
    color: var(--muted);
    margin: 0;
    max-width: 720px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: #2980FE;
    color: #FFFFFF;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(41, 128, 254, 0.25);
    transition: transform .18s ease, background .18s ease, box-shadow .18s ease;
}

.download-btn:hover {
    background: #1768E8;
    transform: translateY(-2px);
    box-shadow: 0 18px 34px rgba(23, 104, 232, 0.30);
}

.text-link {
    color: var(--blue);
    font-weight: 800;
    display: inline-flex;
    margin-top: 10px;
}

.connection-workspace-hero {
    padding: 44px 0 58px;
    background: var(--gradient);
    color: #FFFFFF;
    position: relative;
    overflow: hidden;
}

.connection-workspace-hero::before,
.connection-workspace-hero::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
    filter: blur(8px);
}

.connection-workspace-hero::before {
    width: 280px;
    height: 280px;
    right: -110px;
    top: -100px;
}

.connection-workspace-hero::after {
    width: 180px;
    height: 180px;
    left: -60px;
    bottom: -70px;
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 28px;
    align-items: center;
}

.hero-content h1 {
    font-size: clamp(36px, 9vw, 64px);
    line-height: 1.08;
    letter-spacing: -0.06em;
    margin: 16px 0;
}

.hero-content p {
    color: rgba(255, 255, 255, 0.88);
    margin: 0 0 22px;
    max-width: 650px;
    font-size: 17px;
}

.hero-content .download-btn {
    background: #2980FE;
}

.hero-tags,
.status-tags,
.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.hero-tags span,
.status-tags span,
.card-tags span {
    border-radius: 999px;
    padding: 7px 11px;
    background: rgba(255, 255, 255, 0.16);
    border: 1px solid rgba(255, 255, 255, 0.26);
    font-size: 13px;
}

.workspace-visual {
    position: relative;
    border-radius: var(--radius-lg);
    padding: 18px;
    background: rgba(255, 255, 255, 0.18);
    box-shadow: 0 28px 80px rgba(16, 24, 40, 0.22);
}

.workspace-visual img {
    width: 100%;
    border-radius: 24px;
    background: #FFFFFF;
}

.status-panel,
.float-task {
    background: rgba(255, 255, 255, 0.94);
    color: var(--text);
    border-radius: 22px;
    padding: 16px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.75);
}

.status-panel {
    margin-top: 14px;
}

.status-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 9px 0;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
}

.status-row:last-child {
    border-bottom: 0;
}

.status-row strong {
    color: var(--deep);
}

.quick-task-entries,
.risk-grid,
.faq-grid,
.feature-grid,
.scenario-grid,
.info-grid {
    display: grid;
    gap: 16px;
}

.quick-task-card,
.task-card,
.capability-card,
.feature-card,
.risk-card,
.faq-item,
.info-card,
.step-card,
.note-card,
.page-card {
    background: #FFFFFF;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: 0 12px 32px rgba(18, 35, 85, 0.06);
}

.quick-task-card strong,
.task-card strong,
.capability-card h3,
.feature-card h3,
.risk-card h3,
.info-card h3,
.step-card h3,
.note-card h3 {
    color: var(--deep);
}

.quick-task-card p,
.task-card p,
.capability-card p,
.feature-card p,
.risk-card p,
.info-card p,
.step-card p,
.note-card p,
.page-card p {
    color: var(--muted);
    margin: 8px 0 0;
}

.connection-capability-overview {
    background: var(--soft);
}

.capability-layout {
    display: grid;
    gap: 16px;
}

.capability-card.large {
    background: linear-gradient(180deg, #FFFFFF 0%, #F4F8FF 100%);
}

.capability-card .label {
    margin-bottom: 12px;
}

.split-section {
    background: #FFFFFF;
}

.split-card {
    display: grid;
    gap: 24px;
    align-items: center;
    border-radius: 34px;
    padding: 24px;
    border: 1px solid var(--line);
    background: #FFFFFF;
    box-shadow: var(--shadow);
}

.split-card.reverse .media {
    order: -1;
}

.split-card .media img,
.security-media img {
    border-radius: 28px;
    border: 1px solid var(--line);
    background: #F7FAFF;
}

.bullet-list {
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
}

.bullet-list li {
    position: relative;
    padding-left: 24px;
    color: #384456;
}

.bullet-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 11px;
    width: 9px;
    height: 9px;
    background: var(--blue);
    border-radius: 999px;
}

.encrypted-tunnel-section {
    background: #F8FAFF;
}

.security-panel {
    display: grid;
    gap: 18px;
    border: 1px solid var(--line);
    border-radius: 34px;
    padding: 24px;
    background: #FFFFFF;
    box-shadow: var(--shadow);
}

.route-optimization-section {
    background: linear-gradient(180deg, #FFFFFF 0%, #F4F7FC 100%);
}

.route-status {
    display: grid;
    gap: 14px;
}

.route-line {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: center;
    padding: 14px;
    background: #F8FAFF;
    border: 1px solid var(--line);
    border-radius: 18px;
}

.route-line span {
    color: var(--muted);
}

.device-protection-section {
    background: #FFFFFF;
}

.device-stack {
    display: grid;
    gap: 14px;
}

.device-card {
    padding: 16px;
    border-radius: 22px;
    border: 1px solid var(--line);
    background: #F9FBFF;
}

.data-boundary-section {
    background: #F5F7FB;
}

.usage-scenarios-section {
    background: #FFFFFF;
}

.connection-checkup-section {
    background: #F8FAFF;
}

.process-steps {
    display: grid;
    gap: 16px;
    counter-reset: steps;
}

.step-card {
    position: relative;
}

.step-number {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    background: var(--blue);
    color: #FFFFFF;
    font-weight: 900;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.risk-card {
    border-left: 4px solid var(--blue);
}

.cta-section {
    padding: 58px 0;
}

.cta-box {
    border-radius: 34px;
    padding: 34px 22px;
    text-align: center;
    color: #FFFFFF;
    background: var(--gradient);
    box-shadow: 0 26px 70px rgba(77, 82, 210, 0.22);
}

.cta-box h2 {
    margin: 0 0 12px;
    font-size: clamp(28px, 5vw, 46px);
    letter-spacing: -0.04em;
}

.cta-box p {
    color: rgba(255, 255, 255, 0.88);
    max-width: 660px;
    margin: 0 auto 22px;
}

.page-hero {
    padding: 52px 0 32px;
    background: linear-gradient(180deg, #F5F8FF 0%, #FFFFFF 100%);
}

.page-title h1 {
    font-size: clamp(34px, 8vw, 58px);
}

.page-layout {
    display: grid;
    gap: 22px;
    padding-bottom: 60px;
}

.article-panel {
    background: #FFFFFF;
    border: 1px solid var(--line);
    border-radius: 32px;
    padding: 22px;
    box-shadow: var(--shadow);
}

.article-panel p {
    color: #3F4A5F;
    margin: 0 0 16px;
}

.article-panel h2 {
    color: var(--deep);
    margin-top: 26px;
    line-height: 1.25;
}

.aside-panel {
    border-radius: 28px;
    border: 1px solid var(--line);
    background: #F8FAFF;
    padding: 20px;
    height: fit-content;
}

.aside-panel h2,
.aside-panel h3 {
    margin-top: 0;
    color: var(--deep);
}

.check-list {
    list-style: none;
    margin: 14px 0;
    padding: 0;
    display: grid;
    gap: 10px;
}

.check-list li {
    padding: 12px 14px;
    border-radius: 16px;
    background: #FFFFFF;
    border: 1px solid var(--line);
    color: #3E4A5E;
}

.download-zone {
    margin-top: 22px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
}

.download-page .download-zone {
    text-align: center;
    border-top: 0;
}

.faq-item h2,
.faq-item h3 {
    margin: 0 0 8px;
    font-size: 18px;
}

.faq-item p {
    margin: 0;
    color: var(--muted);
}

.site-footer {
    background: #101827;
    color: #D8E0EF;
    padding: 44px 0 0;
}

.footer-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 28px;
}

.footer-logo {
    color: #FFFFFF;
}

.footer-brand p {
    color: #A7B2C5;
    max-width: 430px;
}

.footer-links {
    display: grid;
    gap: 22px;
}

.footer-links h3 {
    color: #FFFFFF;
    margin: 0 0 10px;
    font-size: 16px;
}

.footer-links a {
    display: block;
    color: #A7B2C5;
    margin: 8px 0;
}

.footer-links a:hover {
    color: #FFFFFF;
}

.footer-bottom {
    margin-top: 34px;
    border-top: 1px solid rgba(255, 255, 255, 0.09);
    padding: 16px;
    text-align: center;
    color: #9AA6BA;
    font-size: 14px;
}

@media (min-width: 640px) {
    .quick-task-entries,
    .info-grid,
    .feature-grid,
    .scenario-grid,
    .risk-grid,
    .faq-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .process-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-links {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (min-width: 900px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        background: transparent;
        box-shadow: none;
        border: 0;
        padding: 0;
        gap: 2px;
    }

    .site-nav a {
        padding: 9px 10px;
        white-space: nowrap;
    }

    .connection-workspace-hero {
        padding: 72px 0 78px;
    }

    .hero-grid {
        grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.95fr);
    }

    .workspace-visual {
        padding: 22px;
    }

    .status-panel {
        position: absolute;
        left: -24px;
        bottom: 24px;
        width: 250px;
        margin-top: 0;
    }

    .float-task {
        position: absolute;
        right: -12px;
        top: 28px;
        width: 210px;
    }

    .quick-task-entries {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        margin-top: -30px;
        position: relative;
        z-index: 2;
    }

    .capability-layout {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        grid-auto-flow: dense;
    }

    .capability-card.large {
        grid-column: span 2;
        min-height: 220px;
    }

    .split-card {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        padding: 34px;
    }

    .split-card.reverse .media {
        order: 2;
    }

    .security-panel {
        grid-template-columns: 1.1fr 0.9fr;
        padding: 34px;
    }

    .route-status {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .info-grid.three,
    .scenario-grid.three {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .risk-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .process-steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .page-layout {
        grid-template-columns: minmax(0, 1fr) 320px;
        align-items: start;
    }

    .article-panel {
        padding: 34px;
    }

    .footer-inner {
        grid-template-columns: 1fr 1.4fr;
    }
}

@media (min-width: 1120px) {
    .site-nav a {
        padding: 9px 12px;
    }
}