/* ========================================
   Ling.AI - 首页（Mist iris platinum palette + original three-section layout）
   ======================================== */

@font-face {
    font-family: 'Outfit';
    src: url('/fonts/outfit-font.woff2') format('woff2');
    font-weight: 400 800;
    font-display: swap;
}

@font-face {
    font-family: 'JetBrains Mono';
    src: url('/fonts/jetbrains-mono-font.woff2') format('woff2');
    font-weight: 400 700;
    font-display: swap;
}

.page-home {
    --home-bg: #f8f8fb;
    --home-surface: #ffffff;
    --home-surface-muted: #f0f0f7;
    --home-text: #15151b;
    --home-text-secondary: #575866;
    --home-text-muted: #9d9caf;
    --home-accent: #6768b6;
    --home-accent-secondary: #8e8f9d;
    --home-accent-deep: #4f518f;
    --home-accent-soft: rgba(103, 104, 182, 0.12);
    --home-border: rgba(21, 21, 27, 0.07);
    --home-border-strong: rgba(21, 21, 27, 0.12);
    --home-terminal-bg: #171824;
    --home-terminal-border: rgba(255, 255, 255, 0.10);
    --home-btn-primary-bg: #15151b;
    --home-btn-primary-hover: #292a3f;
    --home-container: 1140px;
    --home-radius-xl: 16px;
    --home-radius-lg: 12px;
    --home-font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --home-font-display: 'Outfit', var(--home-font-sans);
    --home-font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
    --home-grid: linear-gradient(rgba(21, 21, 27, 0.032) 1px, transparent 1px), linear-gradient(90deg, rgba(21, 21, 27, 0.032) 1px, transparent 1px);
    --home-ink-wash: radial-gradient(circle at 50% 8%, rgba(103, 104, 182, 0.095), rgba(248, 248, 251, 0) 38%), linear-gradient(180deg, rgba(103, 104, 182, 0.055), rgba(248, 248, 251, 0) 330px);
}

.page-home {
    margin: 0;
    background-color: var(--home-bg);
    background-image: var(--home-ink-wash), var(--home-grid);
    background-size: auto, 44px 44px, 44px 44px;
    color: var(--home-text);
    font-family: var(--home-font-sans);
    -webkit-font-smoothing: antialiased;
}

.page-home a {
    color: inherit;
    text-decoration: none;
}

.page-home .navbar {
    background: rgba(248, 248, 251, 0.86);
    border-bottom: 1px solid var(--home-border);
    backdrop-filter: saturate(140%) blur(12px);
    -webkit-backdrop-filter: saturate(140%) blur(12px);
}

.page-home .navbar.scrolled {
    background: rgba(248, 248, 251, 0.94);
    border-bottom-color: var(--home-border);
    box-shadow: none;
}

.page-home .navbar-container {
    max-width: var(--home-container);
    padding: 0.75rem 24px;
    min-height: 70px;
}

.page-home .logo {
    gap: 0;
}

.page-home .logo-svg {
    color: var(--home-text);
}

.page-home .nav-links {
    gap: 36px;
}

.page-home .nav-link {
    font-family: var(--home-font-display);
    font-size: 14px;
    font-weight: 500;
    text-transform: none;
    letter-spacing: 0.02em;
    color: var(--home-text-secondary);
}

.page-home .nav-link::after {
    height: 1.5px;
    background: var(--home-accent);
    bottom: -4px;
}

.page-home .nav-link:hover,
.page-home .nav-link.active {
    color: var(--home-accent);
}

.page-home .nav-actions {
    gap: 10px;
}

.page-home .btn {
    padding: 9px 18px;
    border-radius: 8px;
    font-family: var(--home-font-display);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.page-home .btn-primary {
    background: var(--home-btn-primary-bg);
    border: 1px solid var(--home-btn-primary-bg);
    color: #fafafa;
    box-shadow: none;
}

.page-home .btn-primary:hover {
    background: var(--home-btn-primary-hover);
    border-color: var(--home-btn-primary-hover);
    box-shadow: none;
    transform: translateY(-1px);
}

.page-home .btn-secondary {
    background: var(--home-surface);
    border: 1px solid var(--home-border-strong);
    color: var(--home-text);
}

.page-home .btn-secondary:hover {
    background: var(--home-surface);
    border-color: var(--home-accent);
    color: var(--home-accent);
}

.page-home .hamburger span,
.page-home .hamburger span::before,
.page-home .hamburger span::after {
    background: var(--home-text);
    height: 2px;
    border-radius: 2px;
}

.page-home .mobile-menu {
    background: var(--home-bg);
}

.page-home .mobile-menu-header,
.page-home .mobile-menu-actions {
    border-color: var(--home-border);
}

.page-home .mobile-nav-link {
    font-family: var(--home-font-display);
    color: var(--home-text-secondary);
    border-bottom-color: var(--home-border);
}

.page-home .mobile-nav-link:hover,
.page-home .mobile-nav-link.active {
    color: var(--home-accent);
}

.page-home .docs-home-shell {
    width: min(var(--home-container), calc(100% - 48px));
    margin: 0 auto;
    padding: 24px 0 80px;
}

/* Hero — 居中，端庄大气排版 */
.page-home .docs-home-hero {
    padding: 64px 20px 48px;
}

.page-home .home-hero-brand {
    margin: 0 0 20px;
    color: var(--home-text-muted);
    font-family: var(--home-font-display);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.page-home .docs-home-hero-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 42px 28px 36px;
    border-top: 1px solid var(--home-border);
    border-bottom: 1px solid var(--home-border);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0.56)),
        linear-gradient(135deg, rgba(103, 104, 182, 0.10), rgba(255, 255, 255, 0) 44%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 28px 88px rgba(21, 21, 27, 0.06);
}

.page-home .home-hero-badge {
    display: inline-flex;
    align-items: center;
    padding: 5px 12px;
    border: 1px solid var(--home-border);
    border-radius: 999px;
    background: var(--home-surface);
    color: var(--home-text-secondary);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 20px;
}

.page-home .docs-home-title {
    margin: 0;
    font-family: var(--home-font-display);
    font-size: clamp(40px, 5.8vw, 60px);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: 0.02em;
    color: var(--home-text);
}

.page-home .docs-home-statement {
    margin: 28px 0 0;
    font-family: var(--home-font-display);
    font-size: clamp(22px, 3.2vw, 34px);
    font-weight: 500;
    line-height: 1.35;
    letter-spacing: 0.06em;
}

.page-home .docs-home-statement-accent {
    background: linear-gradient(135deg, var(--home-accent) 0%, var(--home-accent-secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-home .docs-home-description {
    margin: 32px 0 0;
    max-width: 760px;
    color: var(--home-text-secondary);
    font-size: clamp(15px, 1.6vw, 17px);
    line-height: 1.9;
    letter-spacing: 0.02em;
}

.page-home .docs-home-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 44px;
}

.page-home .docs-home-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    min-width: 152px;
    padding: 0 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.page-home .docs-home-action:hover {
    transform: translateY(-1px);
}

.page-home .docs-home-action-primary {
    background: linear-gradient(135deg, var(--home-btn-primary-bg), var(--home-btn-primary-hover));
    color: #fff;
    box-shadow: 0 12px 34px rgba(21, 21, 27, 0.14);
}

.page-home .docs-home-action-primary:hover {
    background: var(--home-btn-primary-hover);
}

.page-home .docs-home-action-secondary {
    border: 1px solid var(--home-border-strong);
    background: var(--home-surface);
    color: var(--home-text);
}

.page-home .docs-home-action-secondary:hover {
    border-color: rgba(103, 104, 182, 0.30);
    background: var(--home-surface-muted);
}

/* Section 卡片 — 原版分区结构 */
.page-home .docs-shell-section {
    margin-top: 20px;
    padding: 32px 28px;
    border: 1px solid var(--home-border);
    border-radius: 8px;
    background: var(--home-surface);
    box-shadow: 0 24px 70px rgba(21, 21, 27, 0.05);
}

.page-home .docs-section-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
    margin-bottom: 28px;
}

.page-home .docs-section-header h2 {
    margin: 0;
    font-family: var(--home-font-display);
    font-size: clamp(22px, 2.8vw, 30px);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.page-home .docs-section-header p {
    margin: 0;
    max-width: 720px;
    color: var(--home-text-secondary);
    font-size: 15px;
    line-height: 1.75;
}

.page-home .docs-protocol-showcase {
    padding-top: 36px;
}

.page-home .docs-sdk-panel {
    width: min(100%, 100%);
    margin: 0 auto;
}

.page-home .docs-sdk-tabs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    padding: 0 8px 12px;
    border-bottom: 1px solid var(--home-border);
    overflow-x: auto;
    scrollbar-width: none;
}

.page-home .docs-sdk-tabs::-webkit-scrollbar {
    display: none;
}

.page-home .docs-sdk-tab {
    position: relative;
    flex: 0 0 auto;
    padding: 6px 8px 8px;
    border: 0;
    background: transparent;
    color: var(--home-text-muted);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.18s ease;
}

.page-home .docs-sdk-tab::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    border-radius: 999px;
    background: transparent;
    transition: background 0.18s ease;
}

.page-home .docs-sdk-tab:hover {
    color: var(--home-text);
}

.page-home .docs-sdk-tab.is-active {
    color: var(--home-accent);
}

.page-home .docs-sdk-tab.is-active::after {
    background: var(--home-accent);
}

.page-home .docs-sdk-panels {
    margin-top: 16px;
}

.page-home .docs-sdk-card {
    display: none;
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius-lg);
    background: var(--home-terminal-bg);
    overflow: hidden;
}

.page-home .docs-sdk-card.is-active {
    display: block;
}

.page-home .docs-sdk-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--home-terminal-border);
    background: rgba(255, 255, 255, 0.03);
}

.page-home .docs-sdk-card-head strong {
    display: block;
    color: #e4e4e7;
    font-size: 14px;
    font-weight: 600;
}

.page-home .docs-sdk-card-head span {
    display: block;
    margin-top: 3px;
    color: #71717a;
    font-size: 12px;
    font-family: var(--home-font-mono);
}

.page-home .docs-copy-button {
    flex: 0 0 auto;
    min-height: 34px;
    padding: 0 12px;
    border: 1px solid var(--home-terminal-border);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.04);
    color: #d4d4d8;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.page-home .docs-copy-button:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fafafa;
}

.page-home .docs-copy-button.is-copied {
    border-color: rgba(34, 197, 94, 0.35);
    background: rgba(34, 197, 94, 0.12);
    color: #86efac;
}

.page-home .docs-sdk-card pre {
    margin: 0;
    padding: 24px 22px 28px;
    overflow-x: auto;
    color: #d4d4d8;
    font-size: 13px;
    line-height: 1.68;
    font-family: var(--home-font-mono);
    white-space: pre-wrap;
}

.page-home .docs-overview-section {
    margin-top: 24px;
}

.page-home .docs-overview-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    align-items: stretch;
}

.page-home .docs-overview-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 0;
    padding: 14px 16px 12px;
    border: 1px solid var(--home-border);
    border-radius: var(--home-radius-lg);
    background: var(--home-surface);
    transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.page-home .docs-overview-card:hover {
    transform: translateY(-2px);
    border-color: rgba(103, 104, 182, 0.24);
    box-shadow: 0 8px 24px rgba(21, 21, 27, 0.05);
}

.page-home .docs-overview-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 10px;
    background: var(--home-accent-soft);
    color: var(--home-accent);
    flex-shrink: 0;
}

.page-home .docs-overview-icon svg {
    width: 16px;
    height: 16px;
}

.page-home .docs-overview-card-body {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1 1 auto;
}

.page-home .docs-overview-card h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.3;
}

.page-home .docs-overview-card p {
    margin: 0;
    color: var(--home-text-secondary);
    font-size: 12px;
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.page-home .docs-overview-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
    padding-top: 0;
    color: var(--home-accent);
    font-size: 12px;
    font-weight: 600;
}

@media (max-width: 1024px) {
    .page-home .docs-overview-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .page-home .docs-home-shell {
        width: min(var(--home-container), calc(100% - 24px));
        padding-bottom: 56px;
    }

    .page-home .docs-home-hero {
        padding: 48px 0 36px;
    }

    .page-home .docs-home-statement {
        margin-top: 22px;
        letter-spacing: 0.04em;
    }

    .page-home .docs-home-description {
        margin-top: 24px;
        font-size: 15px;
        line-height: 1.85;
    }

    .page-home .docs-home-actions {
        align-items: center;
        flex-direction: column;
        margin-top: 36px;
    }

    .page-home .docs-home-action {
        box-sizing: border-box;
        width: min(240px, 72vw);
        min-width: 0;
        min-height: 46px;
        padding: 0 22px;
    }

    .page-home .docs-shell-section {
        padding: 24px 18px;
    }

    .page-home .docs-sdk-tabs {
        justify-content: flex-start;
        gap: 20px;
    }

    .page-home .docs-sdk-card-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .page-home .docs-sdk-card pre {
        font-size: 12px;
        padding: 18px 16px 22px;
    }

    .page-home .docs-overview-grid {
        grid-template-columns: 1fr;
    }

    .page-home .docs-overview-card {
        min-height: 0;
    }
}