:root {
    --brand-gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue: #2980FE;
    --blue-dark: #1768E8;
    --text: #20283a;
    --muted: #667085;
    --light: #f6f8fc;
    --soft-blue: #eef5ff;
    --line: #e6eaf2;
    --white: #ffffff;
    --shadow: 0 18px 45px rgba(25, 35, 75, 0.08);
    --radius-lg: 32px;
    --radius-md: 24px;
    --radius-sm: 18px;
}
* {
    box-sizing: border-box;
}
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: #fbfcff;
    line-height: 1.72;
    overflow-x: hidden;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    display: block;
}
.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(16px);
    border-bottom: 1px solid rgba(230, 234, 242, 0.86);
}
.header-inner {
    width: min(1160px, calc(100% - 28px));
    margin: 0 auto;
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.brand, .footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #14213d;
}
.brand img, .footer-brand img {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: cover;
}
.main-nav {
    display: none;
    position: absolute;
    left: 14px;
    right: 14px;
    top: 68px;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}
.main-nav a {
    display: block;
    padding: 11px 12px;
    border-radius: 13px;
    color: #49546a;
    font-size: 15px;
}
.main-nav a.active,
.main-nav a:hover {
    background: #edf4ff;
    color: var(--blue);
}
.nav-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.nav-toggle-label {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    border: 1px solid var(--line);
    display: grid;
    place-content: center;
    gap: 5px;
    cursor: pointer;
}
.nav-toggle-label span {
    width: 20px;
    height: 2px;
    background: #20283a;
    display: block;
    border-radius: 999px;
}
.nav-toggle:checked ~ .main-nav {
    display: block;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 26px;
    background: var(--blue);
    color: #fff;
    border-radius: 999px;
    font-weight: 800;
    box-shadow: 0 12px 26px rgba(41, 128, 254, 0.28);
    transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    border: none;
    cursor: pointer;
}
.download-btn:hover {
    background: var(--blue-dark);
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(23, 104, 232, 0.28);
}
.text-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--blue);
    font-weight: 750;
}
.text-link::after {
    content: "›";
    font-size: 20px;
    line-height: 1;
}
.section {
    padding: 58px 0;
}
.section-head {
    max-width: 760px;
    margin-bottom: 28px;
}
.section-head.center {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}
.section-kicker, .badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--blue);
    background: #eef5ff;
    border: 1px solid #dbe9ff;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 800;
}
.section h2, .section-title {
    margin: 14px 0 12px;
    font-size: clamp(28px, 5vw, 44px);
    line-height: 1.16;
    letter-spacing: -0.04em;
}
.section p {
    color: var(--muted);
}
.gradient-bg {
    background: var(--brand-gradient);
}
.network-manager-hero {
    padding: 34px 0 38px;
}
.hero-panel {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: var(--brand-gradient);
    color: #fff;
    padding: 34px 22px;
    box-shadow: 0 28px 70px rgba(55, 88, 242, 0.22);
}
.hero-panel::before,
.hero-panel::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
    filter: blur(6px);
}
.hero-panel::before {
    width: 260px;
    height: 260px;
    right: -80px;
    top: -110px;
}
.hero-panel::after {
    width: 180px;
    height: 180px;
    left: -70px;
    bottom: -90px;
}
.hero-content,
.hero-visual {
    position: relative;
    z-index: 1;
}
.hero-content h1 {
    font-size: clamp(34px, 9vw, 66px);
    line-height: 1.06;
    letter-spacing: -0.055em;
    margin: 14px 0 18px;
}
.hero-content p {
    color: rgba(255,255,255,0.88);
    font-size: 17px;
    margin: 0 0 24px;
}
.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    align-items: center;
}
.hero-tags {
    margin-top: 22px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.hero-tags span,
.float-card,
.status-chip {
    background: rgba(255,255,255,0.16);
    border: 1px solid rgba(255,255,255,0.28);
    color: #fff;
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
    backdrop-filter: blur(12px);
}
.hero-visual {
    margin-top: 28px;
    padding: 18px;
    min-height: 320px;
    display: grid;
    place-items: center;
}
.hero-device {
    width: min(360px, 86%);
    margin: 0 auto;
    filter: drop-shadow(0 30px 45px rgba(10, 20, 70, 0.28));
}
.floating-ui {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.float-card {
    position: absolute;
    border-radius: 18px;
    font-weight: 800;
    box-shadow: 0 18px 40px rgba(10, 20, 70, 0.14);
}
.float-card.one { top: 15px; left: 8px; }
.float-card.two { top: 66px; right: 8px; }
.float-card.three { bottom: 82px; left: 0; }
.float-card.four { bottom: 22px; right: 0; }
.daily-scenes {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.scene-card,
.bento-card,
.info-card,
.step-card,
.risk-card,
.faq-item,
.guide-card,
.aside-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    box-shadow: 0 14px 36px rgba(28, 45, 90, 0.06);
}
.scene-card {
    padding: 22px;
}
.card-tag {
    display: inline-flex;
    color: var(--blue);
    background: #eef5ff;
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 800;
    margin-bottom: 12px;
}
.scene-card h3,
.bento-card h3,
.info-card h3,
.step-card h3,
.risk-card h3,
.guide-card h3,
.aside-card h3 {
    margin: 0 0 8px;
    font-size: 21px;
}
.scene-card p,
.bento-card p,
.info-card p,
.step-card p,
.risk-card p,
.guide-card p,
.aside-card p {
    margin: 0 0 14px;
}
.bento-feature-center {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.bento-card {
    padding: 22px;
    min-height: 190px;
    position: relative;
    overflow: hidden;
}
.bento-card::after {
    content: "";
    position: absolute;
    width: 110px;
    height: 110px;
    right: -34px;
    top: -34px;
    background: linear-gradient(135deg, rgba(41,128,254,0.14), rgba(184,77,218,0.1));
    border-radius: 999px;
}
.bento-card.large {
    background: linear-gradient(135deg, #fff 0%, #f2f7ff 100%);
}
.service-panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: 22px;
    align-items: center;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
}
.service-panel.alt {
    background: linear-gradient(135deg, #f7faff 0%, #fff 100%);
}
.service-panel img {
    border-radius: 28px;
    background: #f3f6ff;
    margin: auto;
}
.check-list {
    display: grid;
    gap: 10px;
    margin: 18px 0;
    padding: 0;
    list-style: none;
}
.check-list li {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    color: #3e485c;
}
.check-list li::before {
    content: "";
    width: 9px;
    height: 9px;
    margin-top: 10px;
    border-radius: 999px;
    background: var(--blue);
    flex: 0 0 9px;
}
.smart-route-section,
.network-diagnosis-section {
    background: var(--light);
}
.route-grid,
.privacy-grid,
.device-grid,
.diagnosis-grid,
.account-grid,
.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.info-card,
.guide-card,
.aside-card {
    padding: 22px;
}
.public-wifi-section .wifi-panel {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
}
.wifi-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    align-items: center;
}
.wifi-cards {
    display: grid;
    gap: 14px;
}
.wifi-cards .info-card {
    box-shadow: none;
}
.privacy-guard-section .privacy-panel {
    background: linear-gradient(135deg, #fff 0%, #f8fbff 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    padding: 24px;
}
.process-steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
    counter-reset: step;
}
.step-card {
    padding: 22px;
    position: relative;
}
.step-num {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    color: #fff;
    background: var(--brand-gradient);
    font-weight: 900;
    margin-bottom: 12px;
}
.risk-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
.risk-card {
    padding: 20px;
    border-left: 4px solid var(--blue);
}
.faq-list {
    display: grid;
    gap: 14px;
}
.faq-item {
    padding: 18px 20px;
}
.faq-item h3,
.faq-item summary {
    font-size: 18px;
    margin: 0;
    font-weight: 850;
    color: #20283a;
    cursor: pointer;
}
.faq-item p {
    margin: 10px 0 0;
}
.cta-section {
    padding: 58px 0 76px;
}
.cta-card {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: var(--brand-gradient);
    color: #fff;
    text-align: center;
    padding: 38px 24px;
    box-shadow: 0 26px 64px rgba(55, 88, 242, 0.2);
}
.cta-card h2 {
    margin: 0 0 12px;
    font-size: clamp(28px, 6vw, 44px);
    letter-spacing: -0.04em;
    line-height: 1.16;
}
.cta-card p {
    max-width: 680px;
    margin: 0 auto 24px;
    color: rgba(255,255,255,0.9);
}
.page-hero {
    padding: 42px 0 24px;
    background:
        radial-gradient(circle at top left, rgba(41,128,254,0.14), transparent 34%),
        radial-gradient(circle at top right, rgba(184,77,218,0.12), transparent 28%);
}
.page-hero-inner {
    width: min(900px, calc(100% - 32px));
    margin: 0 auto;
    text-align: center;
}
.page-hero h1 {
    font-size: clamp(32px, 7vw, 56px);
    line-height: 1.1;
    letter-spacing: -0.045em;
    margin: 16px 0 16px;
}
.page-hero p {
    margin: 0 auto;
    max-width: 760px;
    color: var(--muted);
    font-size: 17px;
}
.content-layout {
    width: min(1080px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 32px 0 64px;
}
.article-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
}
.article-card h2 {
    margin: 0 0 12px;
    font-size: 28px;
    letter-spacing: -0.03em;
}
.article-card p {
    color: #5f697c;
}
.article-card ul,
.article-card ol {
    padding-left: 20px;
    color: #4a5368;
}
.article-card li {
    margin: 8px 0;
}
.aside-stack {
    display: grid;
    gap: 16px;
    align-content: start;
}
.inline-cta {
    margin-top: 22px;
    padding: 20px;
    background: #f4f8ff;
    border: 1px solid #dbe9ff;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: flex-start;
}
.download-steps {
    display: grid;
    gap: 14px;
    margin: 24px 0;
}
.download-step {
    display: grid;
    grid-template-columns: 44px 1fr;
    gap: 14px;
    align-items: start;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: #fff;
}
.download-step span {
    width: 44px;
    height: 44px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    background: #eef5ff;
    color: var(--blue);
    font-weight: 900;
}
.download-page .article-card {
    text-align: center;
}
.download-page .download-steps {
    text-align: left;
}
.site-footer {
    background: #101828;
    color: rgba(255,255,255,0.78);
    padding: 44px 0 20px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 26px;
}
.site-footer h2 {
    color: #fff;
    font-size: 16px;
    margin: 0 0 12px;
}
.site-footer a {
    display: block;
    color: rgba(255,255,255,0.78);
    margin: 8px 0;
}
.site-footer a:hover {
    color: #fff;
}
.footer-brand {
    color: #fff;
    margin-bottom: 12px;
}
.footer-bottom {
    width: min(1120px, calc(100% - 32px));
    margin: 26px auto 0;
    border-top: 1px solid rgba(255,255,255,0.12);
    padding-top: 16px;
    font-size: 14px;
}
@media (min-width: 720px) {
    .daily-scenes,
    .route-grid,
    .privacy-grid,
    .device-grid,
    .diagnosis-grid,
    .account-grid,
    .info-grid,
    .risk-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .bento-feature-center {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero-panel {
        padding: 46px;
    }
}
@media (min-width: 980px) {
    .nav-toggle-label {
        display: none;
    }
    .main-nav {
        position: static;
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 0;
        background: transparent;
        border: none;
        box-shadow: none;
        border-radius: 0;
    }
    .main-nav a {
        display: inline-flex;
        padding: 10px 11px;
        font-size: 14px;
    }
    .hero-panel {
        min-height: 620px;
        display: grid;
        grid-template-columns: 1.05fr 0.95fr;
        align-items: center;
        gap: 40px;
        padding: 58px;
    }
    .hero-visual {
        margin-top: 0;
    }
    .daily-scenes {
        grid-template-columns: repeat(3, 1fr);
    }
    .bento-feature-center {
        grid-template-columns: repeat(6, 1fr);
        grid-auto-rows: minmax(180px, auto);
    }
    .bento-card {
        grid-column: span 2;
    }
    .bento-card.large {
        grid-column: span 3;
        min-height: 248px;
    }
    .bento-card.tall {
        grid-column: span 2;
        grid-row: span 2;
    }
    .service-panel {
        grid-template-columns: 1.05fr 0.95fr;
        padding: 34px;
    }
    .service-panel.reverse {
        grid-template-columns: 0.95fr 1.05fr;
    }
    .service-panel.reverse .service-media {
        order: -1;
    }
    .wifi-layout {
        grid-template-columns: 1.1fr 0.9fr;
    }
    .privacy-grid,
    .device-grid,
    .diagnosis-grid,
    .account-grid,
    .info-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .risk-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .process-steps {
        grid-template-columns: repeat(3, 1fr);
    }
    .content-layout {
        grid-template-columns: minmax(0, 1fr) 300px;
        gap: 24px;
    }
    .footer-grid {
        grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
    }
}
@media (max-width: 420px) {
    .container {
        width: min(100% - 24px, 1120px);
    }
    .hero-panel {
        padding: 28px 18px;
        border-radius: 26px;
    }
    .hero-content h1 {
        font-size: 34px;
    }
    .download-btn {
        width: 100%;
    }
    .hero-actions .download-btn {
        width: auto;
    }
    .float-card {
        font-size: 12px;
        padding: 6px 9px;
    }
    .section {
        padding: 44px 0;
    }
}