/* 功能页 — Mission Console（深空底、青绿主色、手风琴面板 + 标签云） */

/* ----- Console token 覆盖（依赖 common.css 变量体系） ----- */
body.page-ledger {
    --canvas: #0B1220;
    --canvas-deep: #060B16;
    --surface-card: #131C2E;
    --surface-card-elevated: #18243C;
    --surface-strong: #1C2942;

    --primary: #2DD4BF;
    --primary-active: #14B8A6;
    --primary-glow: rgba(45, 212, 191, 0.35);

    --ink: #E5E7EB;
    --body: #94A3B8;
    --body-strong: #E5E7EB;
    --muted: #64748B;
    --muted-soft: #475569;
    --on-primary: #06231F;

    --hairline: rgba(255, 255, 255, 0.08);
    --hairline-soft: rgba(255, 255, 255, 0.05);
    --hairline-strong: rgba(255, 255, 255, 0.14);

    --semantic-success: #2DD4BF;
    --accent-cyan: #38BDF8;

    --font-display: "Space Grotesk", "Noto Sans SC", sans-serif;
    --font-body: "Inter", "Noto Sans SC", sans-serif;
    --font-code: "JetBrains Mono", monospace;

    --font-primary: var(--font-body);

    --bg-primary: var(--canvas);
    --bg-secondary: var(--surface-card);
    --bg-white: var(--surface-card-elevated);
    --bg-hover: var(--surface-strong);
    --text-primary: var(--ink);
    --text-secondary: var(--body);
    --text-tertiary: var(--muted);
    --accent-color: var(--primary);
    --accent-hover: var(--primary-active);
    --accent-light: rgba(45, 212, 191, 0.1);
    --primary-blue: var(--primary);
    --primary-blue-hover: var(--primary-active);
    --primary-blue-light: rgba(45, 212, 191, 0.1);
    --success-green: var(--semantic-success);
    --border-color: var(--hairline);
    --border-color-light: var(--hairline-soft);

    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);

    background: var(--canvas);
    color: var(--body);
    font-family: var(--font-body);
    letter-spacing: 0;
}

body.page-ledger main {
    padding-top: calc(var(--nav-height) + 8px);
}

/* ----- Nav (reused from index via common, minimal overrides) ----- */
body.page-ledger .site-header--ledger {
    position: relative;
}

body.page-ledger .main-nav {
    background: rgba(11, 18, 32, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: none;
    height: auto;
    display: flex;
    flex-direction: column;
}

body.page-ledger .nav-container--ledger {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    height: var(--nav-height);
    gap: var(--space-md);
}

body.page-ledger .nav-links--center {
    justify-self: center;
}

body.page-ledger .nav-right {
    justify-self: end;
    gap: 10px;
}

body.page-ledger .logo-brand {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--ink);
    font-size: 17px;
}

body.page-ledger .nav-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 14px;
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    background: rgba(45, 212, 191, 0.08);
    border: 1px solid rgba(45, 212, 191, 0.2);
    font-family: var(--font-code);
    font-size: 11px;
    color: var(--accent-teal);
    letter-spacing: 0.02em;
}

body.page-ledger .nav-status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-teal);
    box-shadow: 0 0 8px var(--accent-teal);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

body.page-ledger .nav-links a {
    color: var(--body);
    font-weight: 500;
    font-size: 14px;
    background: transparent;
}

body.page-ledger .nav-links a:hover {
    color: var(--ink);
    background: rgba(255, 255, 255, 0.06);
}

body.page-ledger .nav-links a.active {
    color: var(--accent-teal);
    background: var(--accent-light);
}

body.page-ledger .nav-cta {
    height: 36px;
    padding: 0 16px;
    font-size: 14px;
}

body.page-ledger .nav-rule {
    display: flex;
    flex-direction: column;
    gap: 0;
    width: 100%;
}

body.page-ledger .nav-rule-line {
    display: block;
    height: 1px;
    background: var(--hairline);
}

body.page-ledger .nav-rule-line--accent {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--accent-teal) 20%, var(--accent-teal) 80%, transparent 100%);
    opacity: 0.5;
}

body.page-ledger .dropdown-trigger {
    border-color: var(--hairline-strong);
    color: var(--body);
    background: var(--surface-card);
}

body.page-ledger .dropdown-trigger:hover {
    background: var(--surface-card-elevated);
    color: var(--ink);
    border-color: var(--hairline-strong);
}

body.page-ledger .dropdown-content {
    background: var(--surface-card-elevated);
    border-color: var(--hairline-strong);
    box-shadow: var(--shadow-md);
}

body.page-ledger .dropdown-content a {
    color: var(--body);
    border-bottom-color: var(--hairline-soft);
}

body.page-ledger .dropdown-content a:hover {
    background: var(--surface-strong);
    color: var(--ink);
}

body.page-ledger .dropdown-content a.active {
    background: var(--accent-light);
    color: var(--accent-teal);
}

/* ----- Buttons (global style) ----- */
body.page-ledger .btn-primary {
    background: linear-gradient(135deg, var(--accent-teal) 0%, var(--accent-teal-hover) 100%);
    border-color: transparent;
    color: var(--on-accent);
    box-shadow: 0 4px 16px rgba(45, 212, 191, 0.25);
}

body.page-ledger .btn-primary:hover {
    box-shadow: 0 6px 24px rgba(45, 212, 191, 0.4);
    transform: translateY(-1px);
}

body.page-ledger .btn-secondary {
    background: var(--surface-card);
    border-color: var(--hairline-strong);
    color: var(--ink);
}

body.page-ledger .btn-secondary:hover {
    background: var(--surface-card-elevated);
    border-color: var(--accent-teal);
    color: var(--accent-teal);
}

/* ----- Features Hero Section ----- */
body.page-ledger .features-hero {
    padding: 56px 0 48px;
    border-bottom: 1px solid var(--hairline);
    background:
        radial-gradient(ellipse 60% 50% at 20% 0%, rgba(45, 212, 191, 0.08), transparent),
        radial-gradient(ellipse 50% 40% at 90% 30%, rgba(56, 189, 248, 0.06), transparent),
        var(--canvas);
}

body.page-ledger .features-hero-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

body.page-ledger .features-hero-copy {
    max-width: 640px;
    margin-bottom: 36px;
}

body.page-ledger .features-hero .hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-code);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent-teal);
    margin-bottom: 20px;
    padding: 6px 14px;
    background: var(--accent-light);
    border: 1px solid rgba(45, 212, 191, 0.2);
    border-radius: var(--radius-pill);
}

body.page-ledger .features-hero .kicker-mark {
    font-size: 14px;
    opacity: 0.9;
}

body.page-ledger .features-hero .hero-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 600;
    line-height: 1.08;
    letter-spacing: -0.025em;
    color: var(--ink);
    margin-bottom: 16px;
}

body.page-ledger .features-hero .hero-lead {
    font-size: 18px;
    line-height: 1.65;
    color: var(--body);
    margin-bottom: 0;
    max-width: 520px;
}

/* ----- Data Bars (replacing old stats) ----- */
body.page-ledger .features-data-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    padding: 28px 0 0;
    border-top: 1px solid var(--hairline);
}

body.page-ledger .data-bar {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

body.page-ledger .data-bar-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

body.page-ledger .data-bar-label {
    font-family: var(--font-code);
    font-size: 11px;
    font-weight: 500;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

body.page-ledger .data-bar-value {
    font-family: var(--font-code);
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    font-variant-numeric: tabular-nums;
}

body.page-ledger .data-bar-value--accent {
    color: var(--accent-cyan);
}

body.page-ledger .data-bar-track {
    height: 4px;
    border-radius: 2px;
    background: var(--surface-strong);
    overflow: hidden;
}

body.page-ledger .data-bar-fill {
    display: block;
    height: 100%;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent-teal), var(--accent-cyan));
    transition: width 0.6s ease;
}

body.page-ledger .data-bar-fill--accent {
    background: linear-gradient(90deg, var(--accent-cyan), #60A5FA);
}

body.page-ledger .data-bar-mini {
    font-family: var(--font-code);
    font-size: 10px;
    color: var(--muted);
    letter-spacing: 0.02em;
}

/* ----- Features Accordion Section ----- */
body.page-ledger .features-accordion-section {
    padding: 56px 0 72px;
    background: var(--canvas);
}

body.page-ledger .fa-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Tag Cloud (13 chips) */
body.page-ledger .tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--hairline);
}

body.page-ledger .tag-cloud-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-pill);
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 500;
    color: var(--body);
    transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}

body.page-ledger .tag-cloud-chip:hover {
    border-color: var(--accent-teal);
    color: var(--ink);
    background: var(--surface-card-elevated);
}

body.page-ledger .tag-cloud-chip i {
    color: var(--accent-teal);
    font-size: 13px;
}

body.page-ledger .tag-cloud-chip span {
    line-height: 1.3;
}

/* Accordion Strip */
body.page-ledger .accordion-strip {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

body.page-ledger .accordion-item {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition-normal);
}

body.page-ledger .accordion-item:hover {
    border-color: var(--hairline-strong);
}

body.page-ledger .accordion-item[open] {
    border-color: rgba(45, 212, 191, 0.25);
}

body.page-ledger .accordion-summary {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 24px;
    cursor: pointer;
    list-style: none;
    user-select: none;
}

body.page-ledger .accordion-summary::-webkit-details-marker {
    display: none;
}

body.page-ledger .accordion-summary::-moz-list-bullet {
    list-style: none;
}

body.page-ledger .accordion-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-teal);
    font-size: 18px;
    background: var(--accent-light);
    border: 1px solid rgba(45, 212, 191, 0.2);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

body.page-ledger .accordion-label {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    white-space: nowrap;
}

body.page-ledger .accordion-sub {
    font-family: var(--font-code);
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.04em;
    margin-left: auto;
}

body.page-ledger .accordion-chevron {
    color: var(--muted);
    font-size: 14px;
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

body.page-ledger .accordion-item[open] .accordion-chevron {
    transform: rotate(180deg);
}

body.page-ledger .accordion-body {
    padding: 0 24px 24px;
    border-top: 1px solid var(--hairline);
}

body.page-ledger .accordion-intro {
    font-size: 15px;
    line-height: 1.6;
    color: var(--body);
    margin: 20px 0 24px;
    max-width: 720px;
}

/* Module Grid inside Accordion */
body.page-ledger .amodule-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

body.page-ledger .amodule-card {
    padding: 20px;
    background: var(--surface-card-elevated);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
}

body.page-ledger .amodule-card:hover {
    border-color: rgba(45, 212, 191, 0.3);
    box-shadow: var(--shadow-card);
    transform: translateY(-2px);
}

body.page-ledger .amodule-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px;
}

body.page-ledger .amodule-icon {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-teal);
    font-size: 15px;
    background: var(--accent-light);
    border: 1px solid rgba(45, 212, 191, 0.15);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

body.page-ledger .status-pill {
    font-family: var(--font-code);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: 999px;
    flex-shrink: 0;
}

body.page-ledger .status-stable {
    background: rgba(45, 212, 191, 0.12);
    color: var(--accent-teal);
}

body.page-ledger .status-beta {
    background: rgba(56, 189, 248, 0.12);
    color: var(--accent-cyan);
}

body.page-ledger .amodule-card h3 {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    color: var(--ink);
    margin: 0;
}

body.page-ledger .amodule-card p {
    font-size: 13px;
    line-height: 1.55;
    color: var(--body);
    margin: 0;
    flex: 1;
}

body.page-ledger .amodule-tag {
    font-family: var(--font-code);
    font-size: 11px;
    font-weight: 500;
    color: var(--muted);
    padding-top: 8px;
    border-top: 1px solid var(--hairline);
}

/* ----- CTA Banner ----- */
body.page-ledger .features-cta-banner {
    background:
        radial-gradient(ellipse 60% 50% at 30% 50%, rgba(45, 212, 191, 0.1), transparent),
        var(--canvas-deep);
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
}

body.page-ledger .features-cta-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 56px var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

body.page-ledger .features-cta-copy h2 {
    font-family: var(--font-display);
    font-size: clamp(24px, 2.8vw, 32px);
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
}

body.page-ledger .features-cta-copy p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--body);
    margin: 0;
    max-width: 500px;
}

body.page-ledger .features-cta-actions {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

/* ----- Footer ----- */
body.page-ledger .site-footer--ledger {
    background: var(--canvas-deep);
    border-top: 1px solid var(--hairline);
    color: var(--body);
    position: relative;
}

body.page-ledger .site-footer--ledger::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--accent-teal) 30%, var(--accent-blue) 70%, transparent 100%);
    opacity: 0.4;
}

body.page-ledger .footer-main {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) repeat(4, minmax(0, 1fr));
    gap: 40px;
}

body.page-ledger .footer-logo-text {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--ink);
}

body.page-ledger .footer-description {
    color: var(--body);
}

body.page-ledger .footer-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--accent-light);
    border: 1px solid rgba(45, 212, 191, 0.2);
    border-radius: var(--radius-pill);
    font-family: var(--font-code);
    font-size: 11px;
    color: var(--accent-teal);
    width: fit-content;
}

body.page-ledger .footer-status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-teal);
    box-shadow: 0 0 8px var(--accent-teal);
}

body.page-ledger .footer-group-title {
    font-family: var(--font-code);
    color: var(--accent-teal);
    letter-spacing: 0.08em;
}

body.page-ledger .footer-links-list li a {
    color: var(--body);
}

body.page-ledger .footer-links-list li a:hover {
    color: var(--accent-teal);
}

body.page-ledger .footer-contact-item {
    color: var(--body);
}

body.page-ledger .footer-contact-item strong {
    color: var(--ink);
}

body.page-ledger .footer-bottom {
    border-top: 1px solid var(--hairline);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    margin-top: 40px;
}

body.page-ledger .footer-copyright {
    color: var(--muted);
    font-size: 13px;
}

body.page-ledger .footer-social {
    display: flex;
    gap: 10px;
}

body.page-ledger .footer-social-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--radius-sm);
    color: var(--body);
    transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

body.page-ledger .footer-social-link:hover {
    background: var(--surface-card-elevated);
    color: var(--accent-teal);
    border-color: var(--accent-teal);
}

/* ----- Responsive ----- */
@media (max-width: 1024px) {
    body.page-ledger .nav-container--ledger {
        grid-template-columns: auto 1fr auto;
    }

    body.page-ledger .nav-links--center {
        display: none;
    }

    body.page-ledger .nav-status {
        display: none;
    }

    body.page-ledger .features-data-strip {
        grid-template-columns: repeat(2, 1fr);
    }

    body.page-ledger .accordion-sub {
        display: none;
    }
}

@media (max-width: 768px) {
    body.page-ledger .nav-cta {
        display: none;
    }

    body.page-ledger .features-hero {
        padding: 40px 0 32px;
    }

    body.page-ledger .features-data-strip {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    body.page-ledger .amodule-grid {
        grid-template-columns: 1fr;
    }

    body.page-ledger .features-cta-inner {
        flex-direction: column;
        text-align: center;
    }

    body.page-ledger .features-cta-actions {
        width: 100%;
        max-width: 320px;
        flex-direction: column;
    }

    body.page-ledger .features-cta-actions .btn {
        width: 100%;
    }

    body.page-ledger .accordion-summary {
        padding: 16px 18px;
        flex-wrap: wrap;
    }

    body.page-ledger .accordion-icon {
        width: 36px;
        height: 36px;
        font-size: 15px;
    }

    body.page-ledger .accordion-label {
        font-size: 16px;
    }

    body.page-ledger .accordion-body {
        padding: 0 18px 18px;
    }

    body.page-ledger .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
    }

    body.page-ledger .mobile-menu-toggle span {
        background: var(--ink);
    }
}

@media (max-width: 480px) {
    body.page-ledger .tag-cloud-chip {
        font-size: 12px;
        padding: 6px 10px;
    }
}