:root {
    --theme-primary: #ff6a00;
    --theme-hover: #e05e00;
    --theme-light: #fff5ee;
    --bg-light: #f8f8f8;
    --text-color: #111111;
    --text-muted: #555555;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --shadow-subtle: 0 4px 20px rgba(0,0,0,0.05);
    --shadow-hover: 0 8px 30px rgba(255,106,0,0.12);
    --transition-fast: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    color: var(--text-color);
    background-color: var(--bg-light);
    line-height: 1.6;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    opacity: 1;
    transition: opacity 0.5s ease;
}

#loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

#loading-screen img {
    max-width: 120px;
    height: auto;
}

/* Container */
.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    background-color: #ffffff;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    border-bottom: 3px solid var(--theme-primary);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.header-logo {
    max-height: 48px;
    width: auto;
    display: block;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #ffffff 0%, var(--theme-light) 100%);
    padding: 50px 0 40px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.hero-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-color);
    margin-bottom: 12px;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 650px;
    margin: 0 auto 20px;
}

.update-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: #ffffff;
    color: var(--theme-primary);
    border: 1px solid var(--theme-primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(255,106,0,0.1);
}

/* Main Layout Grid */
.main-layout {
    padding-top: 35px;
    padding-bottom: 60px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Highlight Card */
.highlight-card {
    background: #ffffff;
    border: 2px solid var(--theme-primary);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    box-shadow: var(--shadow-subtle);
}

.card-header-icon {
    background-color: var(--theme-light);
    color: var(--theme-primary);
    padding: 12px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-title {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--text-color);
}

.card-text {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Highlight Tags */
.highlight-tag {
    background-color: var(--theme-light);
    color: var(--theme-hover);
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid rgba(255,106,0,0.2);
}

/* Table of Contents */
.toc-card {
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px 24px;
    box-shadow: var(--shadow-subtle);
}

.toc-title {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toc-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 10px;
}

.toc-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    display: block;
    padding: 4px 8px;
    border-radius: 6px;
}

.toc-link:hover, .toc-link:focus-visible {
    color: var(--theme-primary);
    background-color: var(--theme-light);
    outline: none;
}

/* Expandable Cards */
.policy-sections {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.expandable-card {
    background-color: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-fast);
}

.expandable-card:hover {
    border-color: var(--theme-primary);
    box-shadow: var(--shadow-hover);
}

.card-summary-wrapper {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.card-icon-num {
    background-color: var(--theme-light);
    color: var(--theme-primary);
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-summary-text {
    flex-grow: 1;
}

.section-num {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--theme-primary);
    letter-spacing: 0.5px;
}

.section-title {
    font-size: 1.15rem;
    color: var(--text-color);
    margin: 2px 0 4px;
}

.summary-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Toggle Button */
.toggle-btn {
    background-color: var(--theme-light);
    color: var(--theme-primary);
    border: 1px solid rgba(255,106,0,0.2);
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.toggle-btn:hover, .toggle-btn:focus-visible {
    background-color: var(--theme-primary);
    color: #ffffff;
    outline: none;
}

.arrow-svg {
    transition: transform var(--transition-fast);
}

.toggle-btn[aria-expanded="true"] .arrow-svg {
    transform: rotate(180deg);
}

/* Card Content Smooth Expansion */
.card-expanded-content {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows var(--transition-smooth);
}

.card-expanded-content[hidden] {
    display: grid; /* override default browser hidden */
}

.card-expanded-content.open {
    grid-template-rows: 1fr;
}

.content-body {
    overflow: hidden;
    padding: 0 24px;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth), padding var(--transition-smooth);
}

.card-expanded-content.open .content-body {
    padding: 0 24px 24px;
    opacity: 1;
    transform: translateY(0);
    border-top: 1px solid #f0f0f0;
    margin-top: 4px;
    padding-top: 16px;
}

.content-body p {
    margin-bottom: 12px;
    color: #333333;
}

.content-body ul {
    margin: 10px 0 16px 20px;
}

.content-body li {
    margin-bottom: 6px;
}

.sub-block {
    background-color: #fafafa;
    border-left: 3px solid var(--theme-primary);
    padding: 14px 18px;
    border-radius: 0 8px 8px 0;
    margin: 14px 0;
}

.sub-block h3 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-color);
}

.note-box {
    background-color: var(--theme-light);
    border: 1px dashed var(--theme-primary);
    padding: 12px 16px;
    border-radius: 8px;
    margin: 12px 0;
    font-size: 0.95rem;
}

.warning-card {
    border-color: #fed7aa;
}

.warning-box {
    background-color: #fff7ed;
    border-color: #f97316;
}

.purpose-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 10px;
    list-style: none !important;
    margin: 14px 0 !important;
}

.purpose-grid li {
    background: var(--theme-light);
    border: 1px solid rgba(255,106,0,0.15);
    padding: 10px 14px;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.9rem;
}

/* Notice Card */
.notice-card {
    background: linear-gradient(135deg, #111111 0%, #2a2a2a 100%);
    color: #ffffff;
    border-radius: 12px;
    padding: 28px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.notice-icon {
    color: var(--theme-primary);
    flex-shrink: 0;
}

.notice-title {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: #ffffff;
}

.notice-text {
    color: #cccccc;
    font-size: 0.95rem;
}

/* FAQ Section */
.faq-section {
    background-color: #ffffff;
    border-radius: 12px;
    padding: 32px 24px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-subtle);
}

.section-header {
    text-align: center;
    margin-bottom: 24px;
}

.faq-heading {
    font-size: 1.6rem;
    color: var(--text-color);
}

.faq-subheading {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-top: 4px;
}

.faq-accordion {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition-fast);
}

.faq-item:hover {
    border-color: var(--theme-primary);
}

.faq-trigger {
    width: 100%;
    text-align: left;
    background: #ffffff;
    border: none;
    padding: 16px 20px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.faq-trigger:focus-visible {
    outline: 2px solid var(--theme-primary);
    background-color: var(--theme-light);
}

.faq-trigger .arrow-svg {
    transition: transform var(--transition-fast);
    flex-shrink: 0;
    color: var(--theme-primary);
}

.faq-trigger[aria-expanded="true"] .arrow-svg {
    transform: rotate(180deg);
}

.faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows var(--transition-smooth);
}

.faq-answer[hidden] {
    display: grid;
}

.faq-answer.open {
    grid-template-rows: 1fr;
}

.faq-answer-inner {
    overflow: hidden;
    padding: 0 20px;
    opacity: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: opacity var(--transition-smooth), padding var(--transition-smooth);
}

.faq-answer.open .faq-answer-inner {
    padding: 0 20px 16px;
    opacity: 1;
    border-top: 1px dashed #eee;
    padding-top: 12px;
}

/* CTA Card */
.cta-card {
    background: linear-gradient(135deg, var(--theme-primary) 0%, var(--theme-hover) 100%);
    color: #ffffff;
    border-radius: 12px;
    padding: 36px 24px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(255,106,0,0.25);
}

.cta-title {
    font-size: 1.6rem;
    margin-bottom: 8px;
}

.cta-desc {
    font-size: 1rem;
    margin-bottom: 20px;
    opacity: 0.95;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: #ffffff;
    color: var(--theme-hover);
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition-fast);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.cta-button:hover, .cta-button:focus-visible {
    background-color: #111111;
    color: #ffffff;
    transform: translateY(-2px);
    outline: none;
}

/* Footer Dynamic Container */
.site-footer {
    margin-top: auto;
    background-color: #ffffff;
    border-top: 1px solid var(--border-color);
}

.fallback-footer {
    padding: 24px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Reveal Animation Class */
.reveal-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .reveal-section {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* Mobile Responsive */
@media (max-width: 640px) {
    .hero-title {
        font-size: 1.6rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .highlight-card, .notice-card {
        flex-direction: column;
        gap: 12px;
        padding: 18px;
    }

    .card-summary-wrapper {
        flex-wrap: wrap;
        padding: 16px;
    }

    .toggle-btn {
        width: 100%;
        justify-content: center;
        margin-top: 8px;
    }

    .toc-list {
        grid-template-columns: 1fr;
    }

    .purpose-grid {
        grid-template-columns: 1fr;
    }

    .cta-card {
        padding: 28px 16px;
    }
}