:root {
    --primary: rgb(70,139,223);
    --primary-dark: #1f5fae;
    --primary-soft: #eef6ff;
    --text-main: #14213d;
    --text-muted: #5f6f89;
    --line: rgba(70, 139, 223, 0.16);
    --card: rgba(255,255,255,0.92);
    --shadow: 0 14px 34px rgba(31, 95, 174, 0.10);
    --radius: 22px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background:
        radial-gradient(circle at 10% 2%, rgba(70,139,223,0.22), transparent 32%),
        radial-gradient(circle at 94% 12%, rgba(112,176,255,0.18), transparent 28%),
        linear-gradient(180deg, #f6fbff 0%, #ffffff 42%, #f5f9ff 100%);
    line-height: 1.75;
    min-height: 100vh;
    overflow-x: hidden;
}

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(18px);
    background: rgba(246, 251, 255, 0.86);
    border-bottom: 1px solid rgba(70,139,223,0.12);
}

.header-inner {
    width: min(100%, 460px);
    margin: 0 auto;
    padding: 12px 16px 10px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 9px;
    font-weight: 800;
    letter-spacing: 0.3px;
    color: #10345d;
    font-size: 17px;
}

.logo {
    width: 34px;
    height: 34px;
    border-radius: 11px;
    box-shadow: 0 8px 20px rgba(70,139,223,0.22);
}

.mobile-nav {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding: 12px 0 2px;
    scrollbar-width: none;
}

.mobile-nav::-webkit-scrollbar {
    display: none;
}

.mobile-nav a {
    flex: 0 0 auto;
    padding: 7px 12px;
    border-radius: 999px;
    font-size: 13px;
    color: #42607e;
    background: rgba(255,255,255,0.76);
    border: 1px solid rgba(70,139,223,0.12);
}

.mobile-nav a.active,
.mobile-nav a:focus-visible {
    background: var(--primary);
    color: #fff;
    outline: none;
    box-shadow: 0 8px 18px rgba(70,139,223,0.22);
}

.site-main {
    width: min(100%, 460px);
    margin: 0 auto;
    padding: 18px 16px 28px;
}

.banner,
.page-hero,
.download-hero {
    position: relative;
    overflow: hidden;
    border-radius: 28px;
    background:
        linear-gradient(145deg, rgba(70,139,223,0.16), rgba(255,255,255,0.94) 46%, rgba(234,245,255,0.92)),
        radial-gradient(circle at 95% 4%, rgba(70,139,223,0.20), transparent 38%);
    border: 1px solid rgba(70,139,223,0.16);
    box-shadow: var(--shadow);
    padding: 24px 18px;
}

.banner::after,
.page-hero::after,
.download-hero::after {
    content: "";
    position: absolute;
    width: 160px;
    height: 160px;
    border: 1px solid rgba(70,139,223,0.16);
    border-radius: 999px;
    right: -70px;
    bottom: -75px;
}

.eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    margin-bottom: 12px;
    border-radius: 999px;
    background: rgba(70,139,223,0.10);
    color: var(--primary-dark);
    font-size: 12px;
    font-weight: 700;
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.25;
    color: #10243e;
}

h1 {
    font-size: 30px;
    letter-spacing: -0.7px;
}

h2 {
    font-size: 22px;
    margin-bottom: 12px;
}

h3 {
    font-size: 17px;
    margin-bottom: 8px;
}

p {
    margin: 0;
    color: var(--text-muted);
    font-size: 15px;
}

.lead {
    margin-top: 12px;
    font-size: 16px;
    color: #38536f;
}

.banner-layout {
    display: grid;
    gap: 18px;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0 18px;
}

.hero-tags span,
.mini-tag {
    display: inline-flex;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255,255,255,0.82);
    border: 1px solid rgba(70,139,223,0.12);
    color: #345675;
    font-size: 12px;
    font-weight: 700;
}

.product-visual {
    position: relative;
    min-height: 246px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-visual::before {
    content: "";
    position: absolute;
    inset: 24px 52px 18px;
    border-radius: 36px;
    background: linear-gradient(180deg, rgba(70,139,223,0.20), rgba(70,139,223,0.06));
    filter: blur(2px);
}

.product-visual img {
    position: relative;
    width: 210px;
    border-radius: 32px;
    filter: drop-shadow(0 22px 28px rgba(31,95,174,0.18));
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    font-size: 15px;
    border: 1px solid rgba(255,255,255,0.18);
    box-shadow: 0 14px 24px rgba(70,139,223,0.28);
}

.download-btn:active {
    transform: translateY(1px);
}

.section {
    margin-top: 22px;
}

.section-title {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.section-title p {
    font-size: 13px;
}

.card,
.info-card,
.faq-item,
.step-card,
.note-card {
    background: var(--card);
    border: 1px solid rgba(70,139,223,0.13);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
}

.card + .card,
.faq-item + .faq-item,
.step-card + .step-card {
    margin-top: 12px;
}

.soft-card {
    background: linear-gradient(145deg, rgba(238,246,255,0.95), rgba(255,255,255,0.96));
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.feature-card {
    padding: 18px;
    border-radius: var(--radius);
    background: rgba(255,255,255,0.88);
    border: 1px solid rgba(70,139,223,0.13);
    box-shadow: 0 12px 24px rgba(31,95,174,0.08);
}

.icon-dot {
    width: 34px;
    height: 34px;
    border-radius: 13px;
    background: rgba(70,139,223,0.12);
    display: grid;
    place-items: center;
    color: var(--primary-dark);
    font-weight: 900;
    margin-bottom: 10px;
}

.data-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 14px;
}

.data-block {
    padding: 14px 8px;
    border-radius: 18px;
    background: rgba(238,246,255,0.88);
    text-align: center;
    border: 1px solid rgba(70,139,223,0.12);
}

.data-block strong {
    display: block;
    color: var(--primary-dark);
    font-size: 18px;
    line-height: 1;
}

.data-block span {
    display: block;
    color: var(--text-muted);
    font-size: 11px;
    margin-top: 8px;
}

.scenario-list,
.clean-list {
    display: grid;
    gap: 10px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.scenario-list li,
.clean-list li {
    padding: 13px 14px;
    border-radius: 18px;
    background: rgba(238,246,255,0.78);
    color: #38536f;
    border: 1px solid rgba(70,139,223,0.10);
    font-size: 14px;
}

.faq-item h3,
.step-card h3 {
    color: #173a63;
}

.faq-item p {
    margin-top: 8px;
}

.cta-panel {
    margin-top: 22px;
    padding: 22px 18px;
    border-radius: 26px;
    background: linear-gradient(135deg, var(--primary), #77b1f2);
    color: #fff;
    box-shadow: 0 18px 32px rgba(70,139,223,0.28);
}

.cta-panel h2,
.cta-panel p {
    color: #fff;
}

.cta-panel p {
    opacity: 0.92;
    margin: 10px 0 16px;
}

.cta-panel .download-btn {
    background: #fff;
    color: var(--primary-dark);
    box-shadow: 0 10px 20px rgba(16,36,62,0.12);
}

.article-body {
    display: grid;
    gap: 14px;
}

.article-body p {
    color: #4d627b;
}

.notice-strip {
    padding: 14px 16px;
    border-radius: 20px;
    background: rgba(70,139,223,0.10);
    border: 1px solid rgba(70,139,223,0.16);
    color: #244c75;
    font-size: 14px;
}

.steps {
    counter-reset: step;
    display: grid;
    gap: 12px;
}

.step-card {
    position: relative;
    padding-left: 58px;
}

.step-card::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 18px;
    top: 18px;
    width: 28px;
    height: 28px;
    border-radius: 11px;
    background: var(--primary);
    color: #fff;
    font-size: 14px;
    font-weight: 800;
    display: grid;
    place-items: center;
}

.site-footer {
    width: min(100%, 460px);
    margin: 0 auto;
    padding: 8px 16px 28px;
}

.footer-panel {
    background: rgba(255,255,255,0.86);
    border: 1px solid rgba(70,139,223,0.12);
    border-radius: 24px;
    padding: 18px;
    box-shadow: var(--shadow);
}

.footer-logo {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    margin-bottom: 10px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.footer-links a {
    padding: 7px 10px;
    border-radius: 999px;
    background: rgba(70,139,223,0.08);
    color: #2d5f98;
    font-size: 12px;
    font-weight: 700;
}

.copyright {
    text-align: center;
    font-size: 12px;
    color: #73849a;
    margin-top: 12px;
}

.pc-access-notice {
    position: fixed;
    z-index: 9999;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 22px;
    background: rgba(246, 251, 255, 0.78);
    backdrop-filter: blur(8px);
}

.pc-access-card {
    width: min(380px, 100%);
    padding: 28px 24px;
    border-radius: 24px;
    background: #fff;
    border: 1px solid rgba(70,139,223,0.18);
    box-shadow: 0 22px 50px rgba(31,95,174,0.16);
    text-align: center;
}

.pc-access-card strong {
    display: block;
    font-size: 24px;
    color: #10243e;
    margin-bottom: 10px;
}

.pc-restricted .download-btn {
    display: none !important;
}

@media (min-width: 768px) {
    .pc-restricted .site-header,
    .pc-restricted .site-main,
    .pc-restricted .site-footer {
        filter: blur(2px);
        pointer-events: none;
        user-select: none;
    }
}