* {
    box-sizing: border-box;
}
:root {
    --brand-gradient: linear-gradient(90deg, #3558F2 0%, #7B4EF1 50%, #B84DDA 100%);
    --blue: #2980FE;
    --blue-dark: #1768E8;
    --text: #1d2533;
    --muted: #667085;
    --light: #f5f7fb;
    --soft-blue: #eef5ff;
    --border: #e6eaf2;
    --card: #ffffff;
    --shadow: 0 18px 45px rgba(25, 45, 92, .08);
    --radius: 28px;
}
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: 1.72;
    overflow-x: hidden;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    display: block;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(230, 234, 242, .78);
}
.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-img, .footer-logo {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    object-fit: cover;
}
.brand, .footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}
.brand-text {
    font-weight: 800;
    letter-spacing: -.02em;
}
.nav-toggle {
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 14px;
    width: 44px;
    height: 44px;
    font-size: 22px;
    color: var(--text);
}
.main-nav {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: #fff;
    box-shadow: var(--shadow);
}
.main-nav.is-open {
    display: flex;
}
.main-nav a {
    padding: 10px 12px;
    border-radius: 12px;
    color: #475467;
    font-size: 15px;
}
.main-nav a:hover, .main-nav a.active {
    background: var(--soft-blue);
    color: var(--blue);
}
.container, .section-container {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}
.section {
    padding: 58px 0;
}
.section-title {
    margin: 0 0 12px;
    font-size: clamp(28px, 5vw, 44px);
    line-height: 1.16;
    letter-spacing: -.04em;
}
.section-lead {
    margin: 0 0 28px;
    color: var(--muted);
    max-width: 760px;
}
.eyebrow, .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--blue);
    background: #edf5ff;
    border: 1px solid #d8e9ff;
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 14px;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 22px;
    border-radius: 999px;
    background: var(--blue);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(41, 128, 254, .24);
    transition: .2s ease;
}
.download-btn:hover {
    background: var(--blue-dark);
    transform: translateY(-1px);
}
.network-manager-hero {
    width: min(1180px, calc(100% - 24px));
    margin: 22px auto 0;
    border-radius: 34px;
    padding: 34px 22px;
    background: var(--brand-gradient);
    color: #fff;
    position: relative;
    overflow: hidden;
}
.network-manager-hero::before,
.network-manager-hero::after {
    content: "";
    position: absolute;
    border-radius: 999px;
    background: rgba(255,255,255,.18);
    filter: blur(4px);
}
.network-manager-hero::before {
    width: 240px;
    height: 240px;
    right: -72px;
    top: -66px;
}
.network-manager-hero::after {
    width: 200px;
    height: 200px;
    left: -80px;
    bottom: -90px;
}
.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 28px;
}
.hero-content h1 {
    margin: 0;
    font-size: clamp(34px, 8vw, 64px);
    line-height: 1.05;
    letter-spacing: -.05em;
}
.hero-content p {
    color: rgba(255,255,255,.88);
    margin: 18px 0 24px;
    max-width: 650px;
}
.hero-tags, .float-tags, .tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.hero-tags span, .float-tags span, .tag-row span {
    display: inline-flex;
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
    background: rgba(255,255,255,.16);
    border: 1px solid rgba(255,255,255,.22);
    color: #fff;
}
.hero-visual {
    position: relative;
    min-height: 320px;
    display: grid;
    place-items: center;
}
.hero-device {
    width: min(420px, 90%);
    border-radius: 30px;
    box-shadow: 0 30px 70px rgba(21, 24, 82, .28);
}
.status-card {
    position: absolute;
    left: 0;
    bottom: 10px;
    background: rgba(255,255,255,.92);
    color: var(--text);
    border-radius: 22px;
    padding: 14px 16px;
    box-shadow: 0 18px 40px rgba(29,37,51,.18);
    width: min(240px, 72%);
}
.status-card strong {
    display: block;
    font-size: 15px;
}
.status-card span {
    color: var(--muted);
    font-size: 13px;
}
.float-tags {
    position: absolute;
    right: 0;
    top: 16px;
    display: grid;
}
.float-tags span {
    background: rgba(255,255,255,.92);
    color: #3153e8;
    box-shadow: 0 12px 24px rgba(29,37,51,.12);
}
.daily-scenes {
    display: grid;
    gap: 16px;
}
.scene-card, .bento-card, .info-card, .risk-card, .faq-item, .step-card, .notice-card, .guide-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 12px 34px rgba(25, 45, 92, .05);
}
.scene-card {
    padding: 24px;
}
.scene-card .label, .bento-card .label {
    color: var(--blue);
    font-weight: 800;
    font-size: 13px;
}
.scene-card h3, .bento-card h3, .info-card h3, .risk-card h3, .step-card h3, .guide-card h3 {
    margin: 8px 0 8px;
    font-size: 21px;
    line-height: 1.35;
}
.scene-card p, .bento-card p, .info-card p, .risk-card p, .step-card p, .guide-card p {
    color: var(--muted);
    margin: 0 0 14px;
}
.text-link {
    color: var(--blue);
    font-weight: 800;
}
.bento-feature-center {
    display: grid;
    gap: 16px;
}
.bento-card {
    padding: 24px;
    min-height: 190px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.bento-card.featured {
    background: linear-gradient(180deg, #ffffff 0%, #f3f8ff 100%);
}
.split-panel, .smart-route-section, .safe-browsing-section, .multi-device-section, .network-diagnosis-section, .account-security-section {
    display: grid;
    gap: 24px;
    align-items: center;
}
.panel-box {
    padding: 26px;
    border-radius: 32px;
    background: var(--light);
    border: 1px solid var(--border);
}
.panel-box.white {
    background: #fff;
}
.feature-list, .check-list {
    display: grid;
    gap: 12px;
    padding: 0;
    margin: 18px 0;
    list-style: none;
}
.feature-list li, .check-list li {
    padding: 12px 14px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid var(--border);
    color: #344054;
}
.check-list li::before {
    content: "✓";
    color: var(--blue);
    font-weight: 900;
    margin-right: 8px;
}
.section-image {
    border-radius: 30px;
    width: 100%;
    object-fit: cover;
    background: #f1f5f9;
    box-shadow: var(--shadow);
}
.soft-section {
    background: linear-gradient(180deg, #f7faff 0%, #ffffff 100%);
}
.public-wifi-section .wifi-grid, .privacy-grid, .risk-grid, .faq-grid, .steps-grid, .download-steps, .guide-grid, .notice-grid {
    display: grid;
    gap: 16px;
}
.public-wifi-panel, .privacy-panel, .safety-panel {
    padding: 26px;
    border-radius: 32px;
    border: 1px solid var(--border);
    background: #fff;
    box-shadow: var(--shadow);
}
.info-card, .notice-card, .guide-card {
    padding: 22px;
}
.process-steps {
    display: grid;
    gap: 16px;
}
.step-card {
    padding: 22px;
    position: relative;
}
.step-number {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    display: inline-grid;
    place-items: center;
    background: var(--blue);
    color: #fff;
    font-weight: 900;
}
.risk-card {
    padding: 22px;
    border-left: 4px solid var(--blue);
}
.faq-item {
    padding: 22px;
}
.faq-item h3 {
    margin: 0 0 8px;
    font-size: 18px;
}
.faq-item p {
    margin: 0;
    color: var(--muted);
}
.cta-section {
    width: min(1180px, calc(100% - 32px));
    margin: 40px auto 64px;
    padding: 34px 22px;
    text-align: center;
    color: #fff;
    border-radius: 34px;
    background: var(--brand-gradient);
    overflow: hidden;
    position: relative;
}
.cta-section p {
    color: rgba(255,255,255,.86);
    max-width: 720px;
    margin: 10px auto 22px;
}
.cta-section .download-btn {
    background: var(--blue);
}
.cta-section .download-btn:hover {
    background: var(--blue-dark);
}
.page-hero {
    background: linear-gradient(180deg, #f4f8ff 0%, #ffffff 100%);
    padding: 54px 0 28px;
}
.page-hero-inner {
    width: min(1040px, calc(100% - 32px));
    margin: 0 auto;
}
.page-hero h1 {
    margin: 0 0 14px;
    font-size: clamp(32px, 7vw, 54px);
    line-height: 1.12;
    letter-spacing: -.04em;
}
.page-hero p {
    margin: 0;
    color: var(--muted);
    max-width: 780px;
}
.content-layout {
    width: min(1040px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 22px;
    padding: 24px 0 60px;
}
.article-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 30px;
    padding: 24px;
    box-shadow: 0 12px 34px rgba(25,45,92,.04);
}
.article-card h2 {
    margin-top: 0;
    font-size: 26px;
    letter-spacing: -.02em;
}
.article-card p {
    color: #475467;
}
.sidebar-card {
    border-radius: 26px;
    padding: 22px;
    background: #f8fbff;
    border: 1px solid var(--border);
}
.sidebar-card a {
    display: block;
    padding: 10px 0;
    color: var(--blue);
    font-weight: 800;
}
.download-page-card {
    width: min(920px, calc(100% - 32px));
    margin: 36px auto 64px;
    padding: 26px;
    border-radius: 32px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.site-footer {
    background: #f7f8fb;
    border-top: 1px solid var(--border);
}
.footer-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 34px 0;
    display: grid;
    gap: 22px;
}
.footer-brand p, .footer-bottom p {
    margin: 4px 0 0;
    color: var(--muted);
}
.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 18px;
}
.footer-links a {
    color: #475467;
}
.footer-bottom {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 16px 0 28px;
    border-top: 1px solid var(--border);
}
@media (min-width: 700px) {
    .daily-scenes, .privacy-grid, .risk-grid, .faq-grid, .download-steps, .guide-grid, .notice-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .steps-grid, .process-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .bento-feature-center {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .footer-inner {
        grid-template-columns: 1.4fr 1fr;
        align-items: center;
    }
}
@media (min-width: 960px) {
    .nav-toggle {
        display: none;
    }
    .main-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        gap: 2px;
    }
    .main-nav a {
        font-size: 14px;
        padding: 8px 10px;
    }
    .network-manager-hero {
        padding: 54px;
        margin-top: 28px;
    }
    .hero-grid {
        grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
        align-items: center;
    }
    .daily-scenes {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .bento-feature-center {
        grid-template-columns: repeat(6, 1fr);
    }
    .bento-card {
        grid-column: span 2;
    }
    .bento-card.featured {
        grid-column: span 3;
        min-height: 230px;
    }
    .split-panel, .smart-route-section, .safe-browsing-section, .multi-device-section, .network-diagnosis-section, .account-security-section {
        grid-template-columns: 1fr 1fr;
    }
    .public-wifi-section .wifi-grid {
        grid-template-columns: 1.05fr .95fr;
        align-items: center;
    }
    .risk-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .privacy-grid, .notice-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .content-layout {
        grid-template-columns: minmax(0, 1fr) 300px;
        align-items: start;
    }
    .process-steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .section {
        padding: 76px 0;
    }
}
@media (min-width: 1180px) {
    .main-nav a {
        padding: 8px 12px;
    }
}