/* Rongtong Cloud frame for SpeakNative. Product content and evidence remain product-specific. */
:root {
    --rtc-paper: #f3f0e7;
    --rtc-surface: #fffef9;
    --rtc-ink: #102b2a;
    --rtc-text: #29413f;
    --rtc-muted: #697773;
    --rtc-line: rgba(16, 43, 42, 0.14);
    --rtc-accent: #365f64;
    --rtc-accent-soft: #e0e9e9;
    --rtc-warm: #bc9651;
    --rtc-shadow: 0 28px 72px rgba(18, 42, 38, 0.11);
}

body,
.story-page {
    color: var(--rtc-ink);
    background: var(--rtc-paper);
}

.container { width: min(calc(100% - 48px), 1180px); }

.story-page .site-header,
.legal-page .site-header {
    min-height: 78px;
    border-bottom: 1px solid var(--rtc-line);
    background: rgba(243, 240, 231, 0.94);
}

.header-inner { min-height: 78px; gap: 18px; }

.brand {
    flex: 0 0 auto;
    gap: 0;
}

.brand .company-logo {
    width: 92px;
    height: 70px;
    border-radius: 0;
    object-fit: contain;
}

.product-lockup {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 14px;
    color: var(--rtc-ink);
    text-decoration: none;
}

.product-lockup::before {
    width: 1px;
    height: 28px;
    background: var(--rtc-line);
    content: "";
}

.product-lockup strong {
    display: block;
    font-size: 15px;
    letter-spacing: -0.02em;
}

.product-lockup small {
    display: block;
    margin-top: 1px;
    color: var(--rtc-muted);
    font-size: 8px;
    letter-spacing: 0.14em;
}

.site-nav { gap: 21px; }
.site-nav a { color: var(--rtc-text); font-size: 13px; font-weight: 600; }
.site-nav a:hover { color: var(--rtc-accent); }
.header-actions { gap: 16px; }

.header-download {
    min-height: 44px;
    padding-inline: 20px;
    color: #fff;
    background: var(--rtc-ink);
    font-size: 13px;
}

.header-download:hover { background: var(--rtc-accent); }
.menu-toggle { border-color: var(--rtc-line); color: var(--rtc-ink); background: transparent; }

.story-hero {
    background: var(--rtc-paper);
}

.story-hero::before { display: none; }

.story-hero-grid {
    min-height: 720px;
    padding-block: 92px 76px;
}

.story-category {
    color: var(--rtc-accent);
    font-size: 12px;
    letter-spacing: 0.12em;
}

.story-category::before {
    width: 28px;
    height: 1px;
    background: var(--rtc-accent);
}

.story-hero h1,
.story-problem h2,
.story-section h2,
.story-final h2,
.legal-hero h1 {
    font-family: ui-serif, "Songti SC", STSong, "Hiragino Mincho ProN", "Yu Mincho", serif;
    font-weight: 500;
    letter-spacing: -0.045em;
}

.story-hero h1 {
    max-width: 690px;
    font-size: clamp(54px, 5.4vw, 74px);
    line-height: 1.12;
}

.story-hero h1.story-hero-title-ja { font-size: clamp(46px, 4.7vw, 64px); }
.story-hero h1 em { color: var(--rtc-accent); }
.story-hero h1 em::after { display: none; }
.story-hero-lead { color: var(--rtc-text); font-weight: 480; }

.story-page .button-primary {
    color: #fff;
    border-color: var(--rtc-ink);
    background: var(--rtc-ink);
}

.story-page .button-primary:hover { background: var(--rtc-accent); }
.story-page .button-secondary { border-color: var(--rtc-line); color: var(--rtc-ink); background: transparent; }
.story-hero-facts { color: var(--rtc-muted); }
.story-hero-facts span::before { background: var(--rtc-warm); }

.story-device,
.story-ai-preview {
    border-color: var(--rtc-surface);
    box-shadow: var(--rtc-shadow);
}

.story-route {
    color: var(--rtc-ink);
    background: rgba(255, 254, 249, 0.96);
    box-shadow: 0 18px 48px rgba(18, 42, 38, 0.12);
}

.story-route small { color: var(--rtc-accent); }
.story-route::after { border-color: var(--rtc-warm); }
.story-proof-line { border-color: var(--rtc-line); background: var(--rtc-surface); }
.story-proof-item strong { color: var(--rtc-accent); }
.story-proof-item span { color: var(--rtc-muted); }

.story-problem {
    color: var(--rtc-ink);
    background: #e8e3d6;
}

.story-problem-copy p { color: var(--rtc-text); }
.story-conversation { border-color: var(--rtc-line); background: rgba(255, 254, 249, 0.58); }
.story-conversation-label { color: var(--rtc-accent); }
.story-first-line { color: var(--rtc-ink); background: var(--rtc-surface); }
.story-followups span { border-color: var(--rtc-warm); color: var(--rtc-text); background: rgba(255, 254, 249, 0.56); }
.story-difference { color: var(--rtc-accent); }

.story-section-white,
.story-buy { background: var(--rtc-surface); }
.story-section-cream { background: var(--rtc-paper); }
.story-step { color: var(--rtc-accent); }
.story-step::before { background: var(--rtc-accent); }
.story-section-head p,
.story-copy > p { color: var(--rtc-muted); }

.story-scenes-stage::before,
.story-sentence-stage::before,
.story-free-stage::before,
.story-dialogue-stage::before { background: var(--rtc-accent-soft); }
.story-scene-note { background: var(--rtc-ink); box-shadow: var(--rtc-shadow); }
.story-domain-list li { color: var(--rtc-text); }
.story-domain-list li::before { background: var(--rtc-warm); }
.story-flow li span { background: var(--rtc-accent); }

.story-ai { background: #183432; }
.story-ai::after { display: none; }
.story-ai .story-step { color: #b8d2cf; }
.story-ai-result { color: var(--rtc-ink); background: #d9c38f; }

.story-free-strip,
.story-purchase { border-color: var(--rtc-line); background: var(--rtc-paper); }
.story-purchase.primary { color: #fff; border-color: transparent; background: var(--rtc-ink); }
.story-purchase-label,
.story-free-strip span { color: var(--rtc-accent); }
.story-price { color: var(--rtc-accent); }
.story-purchase.primary .story-price { color: #d9c38f; }

.story-final {
    color: var(--rtc-ink);
    border-top: 1px solid var(--rtc-line);
    background: var(--rtc-paper);
}

.story-final p { color: var(--rtc-muted); }

.site-footer {
    color: var(--rtc-text);
    border-top: 1px solid var(--rtc-line);
    background: var(--rtc-paper);
}

.footer-brand { color: var(--rtc-ink); }
.footer-links a { color: var(--rtc-text); }
.footer-links a:hover { color: var(--rtc-accent); }

.legal-page { background: var(--rtc-paper); }
.legal-hero { padding-block: 90px 72px; color: var(--rtc-ink); background: var(--rtc-paper); }
.legal-hero p { color: var(--rtc-text); }
.legal-meta { color: var(--rtc-muted); }
.legal-main { background: var(--rtc-surface); }
.legal-toc,
.legal-note { border-color: var(--rtc-line); background: var(--rtc-paper); }
.legal-content h2,
.legal-content h3 { color: var(--rtc-ink); }
.legal-contact { color: var(--rtc-accent); }

@media (max-width: 1120px) {
    .story-page .site-header { min-height: 68px; }
    .story-page .header-inner { min-height: 68px; }
    .brand .company-logo { width: 78px; height: 60px; }
    .product-lockup small { display: none; }
    .story-page .site-nav {
        position: absolute;
        top: 68px;
        right: 0;
        left: 0;
        display: none;
        max-height: calc(100dvh - 68px);
        margin: 0;
        padding: 14px 24px 22px;
        overflow-y: auto;
        border-bottom: 1px solid var(--rtc-line);
        background: rgba(243, 240, 231, 0.98);
        box-shadow: 0 18px 40px rgba(18, 42, 38, 0.1);
    }
    .story-page .site-nav.is-open { display: flex; }
    .story-page .site-nav a,
    .story-page .site-nav a:nth-child(3),
    .story-page .site-nav a:nth-child(4) { display: block; min-height: 46px; padding: 13px 4px; border-bottom: 1px solid var(--rtc-line); }
    .story-page .site-nav .site-language-links--mobile {
        display: flex;
        min-height: 52px;
        justify-content: center;
        gap: 15px;
        padding-top: 10px;
    }
    .story-page .site-nav .site-language-links--mobile a { min-height: 40px; border: 0; }
    .story-page .site-language-links--desktop,
    .story-page .header-download { display: none; }
    .story-page .menu-toggle { display: inline-flex; }
    .legal-page .site-language-links--desktop { display: flex; }
}

@media (max-width: 820px) {
    .story-hero-grid { padding-block: 62px 54px; }
    .story-section { padding-block: 86px; }
}

@media (max-width: 560px) {
    .container { width: min(calc(100% - 36px), 1180px); }
    .header-inner { gap: 9px; }
    .brand .company-logo { width: 70px; height: 56px; }
    .product-lockup { gap: 9px; }
    .product-lockup::before { height: 23px; }
    .product-lockup strong { font-size: 13px; }
    .story-hero h1,
    .story-hero h1.story-hero-title-ja { font-size: clamp(40px, 11vw, 49px); line-height: 1.15; }
    .story-hero-actions .button { width: 100%; }
    .story-section { padding-block: 72px; }
    .story-final { padding-block: 72px; }
    .legal-page .header-download { display: none; }
    .legal-page .brand .company-logo { width: 68px; height: 54px; }
    .legal-page .site-language-links--desktop { display: flex; gap: 5px; font-size: 10px; }
}