* {
    box-sizing: border-box;
}
:root {
    --primary: #2980FE;
    --primary-dark: #1568dc;
    --bg: #ffffff;
    --soft: #f5f8fc;
    --soft-blue: #eef6ff;
    --line: #dfe7f1;
    --text: #273142;
    --muted: #667085;
    --dark: #1f2937;
    --shadow: 0 20px 50px rgba(41, 128, 254, 0.10);
    --radius: 26px;
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.75;
    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;
}
.narrow {
    width: min(840px, calc(100% - 32px));
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(16px);
}
.nav-wrap {
    min-height: 72px;
    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;
    color: var(--dark);
}
.brand img,
.footer-brand img {
    width: 38px;
    height: 38px;
    object-fit: contain;
    border-radius: 12px;
}
.site-nav {
    position: fixed;
    left: 16px;
    right: 16px;
    top: 82px;
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: #fff;
    box-shadow: var(--shadow);
}
.nav-open .site-nav {
    display: grid;
}
.site-nav a {
    padding: 10px 12px;
    border-radius: 14px;
    color: var(--muted);
    font-size: 15px;
}
.site-nav a.active,
.site-nav a:hover {
    color: var(--primary);
    background: var(--soft-blue);
}
.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 14px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}
.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--dark);
    border-radius: 4px;
}
.gradient-bg {
    background:
        radial-gradient(circle at 12% 18%, rgba(41, 128, 254, 0.14), transparent 32%),
        radial-gradient(circle at 82% 8%, rgba(41, 128, 254, 0.10), transparent 28%),
        linear-gradient(180deg, #ffffff 0%, #f4f8ff 100%);
}
.launch-hero {
    padding: 54px 0 42px;
}
.launch-grid,
.two-column,
.article-layout {
    display: grid;
    gap: 28px;
}
.hero-copy h1,
.page-hero h1 {
    margin: 12px 0 16px;
    font-size: clamp(38px, 12vw, 72px);
    line-height: 1.05;
    letter-spacing: -0.06em;
    color: var(--dark);
}
.lead,
.page-hero p,
.section-head p {
    color: var(--muted);
    font-size: 17px;
}
.eyebrow,
.category-badge,
.feature-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--soft-blue);
    color: var(--primary);
    font-weight: 700;
    font-size: 13px;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 28px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 16px 28px rgba(41, 128, 254, 0.26);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 18px 34px rgba(41, 128, 254, 0.32);
}
.safety-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}
.safety-tags span {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255,255,255,0.75);
    color: var(--muted);
    font-size: 14px;
}
.app-showcase {
    position: relative;
    min-height: 420px;
    display: grid;
    place-items: center;
}
.phone-orbit {
    position: relative;
    width: min(340px, 88vw);
    padding: 24px;
    border-radius: 42px;
    background: rgba(255,255,255,0.72);
    border: 1px solid rgba(223,231,241,0.9);
    box-shadow: var(--shadow);
}
.phone-orbit img {
    margin: auto;
    max-height: 430px;
    object-fit: contain;
    filter: drop-shadow(0 30px 50px rgba(31,41,55,0.14));
}
.float-tag {
    position: absolute;
    padding: 9px 13px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line);
    color: var(--primary);
    font-weight: 700;
    font-size: 13px;
    box-shadow: 0 12px 28px rgba(31,41,55,0.08);
}
.tag-one { top: 18px; left: -10px; }
.tag-two { top: 110px; right: -16px; }
.tag-three { bottom: 92px; left: -18px; }
.tag-four { bottom: 22px; right: 12px; }
.section {
    padding: 64px 0;
}
.soft-section {
    background: var(--soft);
}
.section-head {
    margin-bottom: 24px;
}
.section-head h2,
.big-feature-card h2,
.cta-section h2,
.content-card h2,
.safety-panel h2,
.article-main h2 {
    margin: 12px 0;
    color: var(--dark);
    line-height: 1.2;
    letter-spacing: -0.03em;
}
.section-head h2 {
    font-size: clamp(28px, 7vw, 44px);
}
.centered {
    text-align: center;
}
.highlight-bar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
.highlight-card,
.category-card,
.risk-card,
.step-card,
.content-card,
.safety-panel,
.faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: 0 12px 30px rgba(31,41,55,0.04);
}
.highlight-card {
    padding: 18px;
    display: grid;
    gap: 6px;
}
.highlight-card strong,
.category-card strong,
.risk-card strong,
.step-card strong {
    color: var(--dark);
}
.highlight-card span,
.category-card p,
.risk-card p,
.step-card p,
.content-card p,
.safety-panel p,
.article-main p,
.faq-item p {
    color: var(--muted);
    margin: 0;
}
.big-feature-card {
    display: grid;
    gap: 26px;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 30px;
    background: #fff;
    box-shadow: var(--shadow);
    overflow: hidden;
}
.big-feature-card h2 {
    font-size: clamp(28px, 7vw, 48px);
}
.feature-media {
    min-height: 260px;
    display: grid;
    place-items: center;
    border-radius: 24px;
    background: linear-gradient(135deg, #f7fbff 0%, #eaf4ff 100%);
}
.feature-media img {
    max-height: 360px;
    object-fit: contain;
    padding: 18px;
}
.check-list,
.number-list {
    padding-left: 20px;
    color: var(--muted);
}
.check-list li,
.number-list li {
    margin: 8px 0;
}
.text-link {
    display: inline-flex;
    margin-top: 10px;
    color: var(--primary);
    font-weight: 800;
}
.mini-panel,
.notice-card {
    margin: 18px 0;
    padding: 16px;
    border-left: 4px solid var(--primary);
    border-radius: 16px;
    background: var(--soft-blue);
    color: var(--text);
}
.process-steps,
.risk-grid,
.category-grid {
    display: grid;
    gap: 14px;
}
.step-card {
    padding: 20px;
    position: relative;
}
.step-card span {
    display: inline-flex;
    margin-bottom: 10px;
    width: 38px;
    height: 38px;
    border-radius: 14px;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
}
.risk-card {
    padding: 20px;
    border-left: 4px solid var(--primary);
}
.risk-card span {
    display: block;
    margin-top: 10px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 700;
}
.app-category-center {
    background: #fff;
}
.category-card {
    padding: 20px;
    min-height: 132px;
    background: linear-gradient(180deg, #fff 0%, #f8fbff 100%);
}
.faq-list {
    display: grid;
    gap: 14px;
}
.faq-item {
    padding: 20px;
}
.faq-item h2,
.faq-item h3 {
    margin: 0 0 8px;
    color: var(--dark);
    font-size: 19px;
}
.cta-section {
    text-align: center;
    background: linear-gradient(135deg, #f4f9ff 0%, #ffffff 100%);
}
.cta-section p {
    color: var(--muted);
}
.page-hero {
    padding: 58px 0 48px;
    text-align: center;
}
.page-hero .download-btn {
    margin-top: 14px;
}
.article-layout {
    align-items: start;
}
.article-main {
    display: grid;
    gap: 20px;
}
.article-block,
.checklist-card {
    padding: 22px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 24px;
}
.content-card,
.safety-panel {
    padding: 24px;
}
.safety-panel {
    background: linear-gradient(180deg, #ffffff 0%, #f5f9ff 100%);
}
.related-links {
    display: grid;
    gap: 10px;
    margin-top: 14px;
}
.related-links a {
    padding: 10px 12px;
    border-radius: 14px;
    background: var(--soft-blue);
    color: var(--primary);
    font-weight: 700;
}
.site-footer {
    padding: 44px 0 24px;
    background: #f3f6fb;
    border-top: 1px solid var(--line);
}
.footer-grid {
    display: grid;
    gap: 24px;
}
.site-footer h3 {
    margin: 0 0 10px;
    color: var(--dark);
}
.site-footer p,
.footer-bottom {
    color: var(--muted);
}
.site-footer a {
    display: block;
    margin: 7px 0;
    color: var(--muted);
}
.site-footer a:hover {
    color: var(--primary);
}
.footer-bottom {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
    font-size: 14px;
}
@media (min-width: 640px) {
    .highlight-bar,
    .risk-grid,
    .category-grid,
    .process-steps,
    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .launch-hero {
        padding-top: 72px;
    }
}
@media (min-width: 900px) {
    .nav-toggle {
        display: none;
    }
    .site-nav {
        position: static;
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
    }
    .site-nav a {
        white-space: nowrap;
        font-size: 14px;
    }
    .launch-grid {
        grid-template-columns: 1.02fr 0.98fr;
        align-items: center;
    }
    .launch-hero {
        padding: 88px 0 72px;
    }
    .highlight-bar {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .big-feature-card {
        grid-template-columns: 1fr 0.95fr;
        padding: 38px;
        align-items: center;
    }
    .big-feature-card.reverse .feature-copy {
        order: 2;
    }
    .big-feature-card.reverse .feature-media {
        order: 1;
    }
    .process-steps {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .risk-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .category-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
    .two-column {
        grid-template-columns: 1.05fr 0.95fr;
    }
    .article-layout {
        grid-template-columns: minmax(0, 1fr) 320px;
    }
    .sticky-panel {
        position: sticky;
        top: 96px;
    }
    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr 1fr;
    }
}
@media (min-width: 1120px) {
    .hero-copy h1 {
        font-size: 76px;
    }
    .page-hero h1 {
        font-size: 58px;
    }
}