/* ===== HIGH-END VISUAL DESIGN :: ETHEREAL GLASS ===== */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

/* ===== 全局变量 ===== */
:root {
    /* 字体系统 — 禁用 Inter/Roboto/Arial/Open Sans/Helvetica */
    --font-display: 'Plus Jakarta Sans', system-ui, sans-serif;
    --font-body: 'Space Grotesk', system-ui, sans-serif;
    --font-mono: 'Cascadia Code', 'Consolas', monospace;
    --font-broadcast: 'Maple Mono CN', 'Cascadia Code', 'Consolas', monospace;

    /* 字号 — 宏大字距 */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.35rem;
    --text-2xl: 1.75rem;
    --text-3xl: 2.25rem;
    --text-4xl: 2.75rem;

    /* 间距 — 巨型呼吸感 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Ethereal Glass 色彩 */
    --color-bg: #050505;
    --color-bg-elevated: #0a0a0a;
    --color-surface: rgba(255, 255, 255, 0.03);
    --color-surface-hover: rgba(255, 255, 255, 0.06);
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-strong: rgba(255, 255, 255, 0.1);

    --color-text: rgba(255, 255, 255, 0.85);
    --color-text-secondary: rgba(255, 255, 255, 0.55);
    --color-text-tertiary: rgba(255, 255, 255, 0.35);

    --color-primary: #6a82fb;
    --color-primary-light: #8ba3ff;
    --color-accent-1: #fc5c7d;
    --color-accent-2: #f0c27f;
    --color-glow: rgba(106, 130, 251, 0.15);

    /* 圆角 — 夸张 squircle */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-2xl: 36px;
    --radius-full: 9999px;

    /* 嵌套事件卡片的统一间距与圆角公式 */
    --event-layout-gap: var(--space-6);
    --nested-radius-gap: var(--space-2);
    --event-content-radius: var(--radius-lg);
    --event-card-radius: calc(var(--event-content-radius) + var(--nested-radius-gap));
    --event-section-radius: calc(var(--event-card-radius) + var(--nested-radius-gap));

    /* 阴影 — 极度柔和扩散，无硬阴影 */
    --shadow-card: 0 8px 40px rgba(0, 0, 0, 0.4);
    --shadow-card-hover: 0 16px 60px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 8px 32px var(--color-glow);

    /* 过渡 — 物理弹簧感 */
    --transition-snappy: all 0.5s cubic-bezier(0.32, 0.72, 0, 1);
    --transition-spring: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-smooth: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    --transition-fast: all 0.2s cubic-bezier(0.32, 0.72, 0, 1);
}

/* ===== Light Theme ===== */
.light-theme {
    --color-bg: #f8f7f4;
    --color-bg-elevated: #ffffff;
    --color-surface: rgba(0, 0, 0, 0.02);
    --color-surface-hover: rgba(0, 0, 0, 0.04);
    --color-border: rgba(0, 0, 0, 0.06);
    --color-border-strong: rgba(0, 0, 0, 0.1);
    --color-text: rgba(0, 0, 0, 0.85);
    --color-text-secondary: rgba(0, 0, 0, 0.5);
    --color-text-tertiary: rgba(0, 0, 0, 0.3);
    --color-glow: rgba(106, 130, 251, 0.08);
}

/* ===== 背景纹理 & 径向网格渐变 ===== */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 80% 60% at 20% 20%, rgba(106, 130, 251, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(252, 92, 125, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 50% 50%, rgba(240, 194, 127, 0.03) 0%, transparent 40%);
    pointer-events: none;
}

.light-theme body::before {
    background:
        radial-gradient(ellipse 70% 50% at 20% 20%, rgba(106, 130, 251, 0.04) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 80% 70%, rgba(252, 92, 125, 0.03) 0%, transparent 50%);
}

/* ===== 基础样式 ===== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    margin: 0;
    padding: var(--space-8);
    min-height: 100vh;
    min-height: 100dvh;
    transition: background-color 0.5s cubic-bezier(0.32, 0.72, 0, 1), color 0.3s cubic-bezier(0.32, 0.72, 0, 1);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* ===== 颗粒纹理叠加 ===== */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
    pointer-events: none;
}

/* ===== 标题 ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.02em;
}

/* ===== 流体岛导航 (Fluid Island Nav) ===== */
.toc-compact {
    position: fixed;
    top: var(--space-6);
    left: var(--space-6);
    z-index: 100;
    max-width: 220px;
    margin-bottom: var(--space-8);
    /* Double-Bezel 外壳 */
    background: rgba(255, 255, 255, 0.03);
    border: 0.5px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-2xl);
    padding: 2px;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    transition: var(--transition-smooth);
}

.toc-compact:hover {
    border-color: rgba(106, 130, 251, 0.2);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
}

.toc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    list-style: none;
    border-radius: calc(var(--radius-2xl) - 3px);
    transition: var(--transition-fast);
    letter-spacing: -0.01em;
}

.toc-header:hover {
    background: var(--color-surface-hover);
}

.toc-header::-webkit-details-marker {
    display: none;
}

.toc-icon {
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    color: var(--color-text-secondary);
}

.toc-compact[open] .toc-icon {
    transform: rotate(180deg);
}

.toc-content {
    padding: var(--space-2) var(--space-3) var(--space-3);
}

.toc-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-1);
}

.toc-links a {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
    font-family: var(--font-body);
    letter-spacing: -0.01em;
}

.toc-links a:hover {
    background: var(--color-surface-hover);
    color: var(--color-text);
}

.toc-links a.active {
    color: var(--color-primary-light);
    background: rgba(106, 130, 251, 0.1);
}

/* ===== 首屏 Hero ===== */
.hero {
    position: relative;
    isolation: isolate;
    min-height: calc(100dvh - (var(--space-8) * 2));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    text-align: center;
}

.hero-copy {
    position: relative;
    z-index: 1;
    width: min(100%, 960px);
    transform: none;
}

.hero-emblem {
    position: absolute;
    z-index: -1;
    top: 50%;
    right: -7%;
    width: min(68vw, 780px);
    color: rgba(255, 255, 255, 0.18);
    pointer-events: none;
    transform: translateY(calc(-50% + 5cm)) rotate(-7deg);
    opacity: 0.42;
}

.hero-emblem img {
    display: block;
    width: 100%;
    height: auto;
    filter: invert(1) grayscale(1) brightness(0.72) drop-shadow(0 0 28px rgba(255, 255, 255, 0.04));
}

.light-theme .hero-emblem {
    color: rgba(20, 24, 50, 0.2);
}

.light-theme .hero-emblem img {
    filter: grayscale(1) brightness(0.72) drop-shadow(0 0 28px rgba(20, 24, 50, 0.06));
}

/* ===== 主标题 (Eyebrow Tag 模式 + 宏大字距) ===== */
.main-title {
    font-family: var(--font-display);
    font-size: clamp(var(--text-3xl), 6vw, var(--text-4xl));
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    text-align: center;
    color: var(--color-text);
    margin: 0 auto;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    box-sizing: border-box;
}

.hero-subtitle {
    margin: var(--space-6) 0 0;
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    letter-spacing: 0.08em;
}

/* Eyebrow badge */
.main-title::before {
    content: 'EMERGENCY EVENTS';
    display: block;
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

/* 渐变下划线 */
.main-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-accent-1), transparent);
    border-radius: var(--radius-full);
    transition: width 0.6s cubic-bezier(0.32, 0.72, 0, 1);
}

.main-title:hover::after {
    width: 180px;
}

/* ===== 高级卡片架构 (Ethereal Glass) ===== */
.section {
    background: rgba(255, 255, 255, 0.02);
    border: 0.5px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    margin-bottom: var(--space-10);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.03),
        0 4px 24px rgba(0, 0, 0, 0.2);
}

.section:hover {
    border-color: rgba(106, 130, 251, 0.12);
    background: rgba(255, 255, 255, 0.025);
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.03),
        0 8px 48px rgba(0, 0, 0, 0.35);
}

/* 标题样式 — 渐变 + 圆点装饰 */
.section h2 {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0 0 var(--space-6) 0;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.section h2::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-primary);
    box-shadow: 0 0 16px var(--color-glow);
}

.section h3 {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0 0 var(--space-4) 0;
    color: var(--color-text);
}

/* 段落 & 列表 */
.section p,
.section ul,
.section ol {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.section ul,
.section ol {
    padding-left: var(--space-6);
}

.section li {
    margin-bottom: var(--space-2);
}

.section strong {
    color: var(--color-text);
    font-weight: 600;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-1));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Asymmetrical Bento Grid 事件卡片 ===== */
#goi-events > *,
#foundation-events > *,
#emergency-events > *,
div.section[id] > * {
    /* Reset for bento grid inside shell */
}

.event {
    background: rgba(255, 255, 255, 0.02);
    border: 0.5px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--event-card-radius);
    padding: var(--space-6);
    margin: 0;
    transition: var(--transition-smooth);
    position: relative;
    overflow: visible;
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.02),
        0 2px 16px rgba(0, 0, 0, 0.15);
}

/* 事件区统一使用外层留白与卡片之间的相同间距 */
.section[id] {
    display: flex;
    flex-direction: column;
    gap: var(--event-layout-gap);
    padding: var(--event-layout-gap);
    border-radius: var(--event-section-radius);
}

.section[id] > h2,
.section[id] > .event,
.section[id] > .event + .event {
    margin-top: 0;
    margin-bottom: 0;
}

/* 阵营事件之间的分割线，仅出现在相邻事件卡片的交界处 */
.section[id] .event + .event::before {
    content: '';
    position: absolute;
    top: calc(var(--event-layout-gap) * -0.5);
    left: 10%;
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(139, 163, 255, 0.28), rgba(252, 92, 125, 0.2), transparent);
    pointer-events: none;
}

.event:hover {
    border-color: rgba(106, 130, 251, 0.15);
    background: rgba(255, 255, 255, 0.025);
    transform: translateY(-3px) scale(1.005);
    box-shadow:
        inset 0 1px 1px rgba(255, 255, 255, 0.02),
        0 12px 48px rgba(0, 0, 0, 0.5);
}

/* 事件标题渐变 */
.event h3 {
    color: transparent;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-1));
    -webkit-background-clip: text;
    background-clip: text;
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 0 0 var(--space-4) 0;
    padding: 0;
    border: none;
}

/* ===== 内容块样式 ===== */
.summary, .task, .broadcast {
    display: block;
    margin: var(--space-4) 0;
    padding: var(--space-5);
    border-radius: var(--event-content-radius);
    font-weight: 500;
    line-height: 1.7;
    transition: var(--transition-smooth);
    position: relative;
}

/* 事件卡片最后一个内容块不额外占用底部外边距，保持四周等距 */
.event > :last-child {
    margin-bottom: 0;
}

/* 广播 — 毛玻璃卡 */
.broadcast {
    background: rgba(106, 130, 251, 0.04);
    border: 0.5px solid rgba(106, 130, 251, 0.08);
    color: var(--color-text-secondary);
    font-family: var(--font-broadcast);
    font-size: var(--text-sm);
    font-weight: 300;
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.02);
}

.broadcast:hover {
    background: rgba(106, 130, 251, 0.07);
    border-color: rgba(106, 130, 251, 0.15);
}

/* 摘要 */
.summary {
    background: rgba(240, 194, 127, 0.04);
    border-left: 2px solid rgba(240, 194, 127, 0.2);
    color: var(--color-accent-2);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.02);
}

.summary:hover {
    background: rgba(240, 194, 127, 0.07);
}

/* 任务 */
.task {
    background: rgba(106, 130, 251, 0.04);
    border-left: 2px solid rgba(106, 130, 251, 0.2);
    color: var(--color-primary-light);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.02);
}

.task:hover {
    background: rgba(106, 130, 251, 0.07);
}

/* ===== 主题切换按钮 — 岛式按钮 (Button-in-Button) ===== */
#theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 500;
    background: rgba(255, 255, 255, 0.03);
    color: var(--color-text);
    border: 0.5px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

#theme-toggle:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(106, 130, 251, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

#theme-toggle:active {
    transform: scale(0.97);
}

.theme-icon {
    font-size: 1.1em;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

#theme-toggle:hover .theme-icon {
    transform: rotate(20deg) scale(1.1);
}

.theme-text {
    font-family: var(--font-body);
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-1));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 分割线 ===== */
.section hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(106, 130, 251, 0.15), transparent);
    margin: var(--space-8) 0;
}

/* ===== 响应式事件排列 ===== */
@media (min-width: 980px) {
    #goi-events,
    #foundation-events,
    #emergency-events,
    #containment-breaches {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--event-layout-gap);
        padding: var(--event-layout-gap);
        align-items: start;
    }

    #goi-events > h2,
    #foundation-events > h2,
    #emergency-events > h2,
    #containment-breaches > h2 {
        grid-column: 1 / -1;
    }

    #goi-events > .event,
    #foundation-events > .event,
    #emergency-events > .event,
    #containment-breaches > .event {
        margin: 0;
    }

    /* 事件按顺序排列；奇数张时最后一张独占整行 */
    #goi-events > .event:last-child:nth-of-type(odd),
    #foundation-events > .event:last-child:nth-of-type(odd),
    #emergency-events > .event:last-child:nth-of-type(odd),
    #containment-breaches > .event:last-child:nth-of-type(odd) {
        grid-column: 1 / -1;
    }

    #goi-events > .event + .event::before,
    #foundation-events > .event + .event::before,
    #emergency-events > .event + .event::before,
    #containment-breaches > .event + .event::before {
        display: none;
    }
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    body {
        padding: var(--space-4);
    }

    .section > * {
        padding: var(--space-5);
    }

    .event > * {
        padding: var(--space-4);
    }

    .section h2 {
        font-size: var(--text-xl);
    }

    .event h3 {
        font-size: var(--text-lg);
    }

    .main-title {
        margin: 0 auto;
    }

    .hero {
        min-height: calc(100dvh - (var(--space-4) * 2));
    }

    .hero-copy {
        width: min(100%, 720px);
        transform: none;
    }

    .hero-emblem {
        right: -24%;
        width: min(92vw, 620px);
        opacity: 0.2;
    }

    .toc-compact {
        max-width: 100%;
    }

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

@media (max-width: 480px) {
    body {
        padding: var(--space-3);
    }

    .section > * {
        padding: var(--space-4);
    }

    .event > * {
        padding: var(--space-3);
    }

    .main-title {
        font-size: var(--text-2xl);
    }

    .hero {
        min-height: calc(100dvh - (var(--space-3) * 2));
    }

    .hero-copy {
        transform: none;
    }

    .hero-emblem {
        right: -42%;
        width: 115vw;
        opacity: 0.12;
    }
}

/* ===== 打印样式 ===== */
@media print {
    body::before,
    body::after {
        display: none;
    }

    .section {
        break-inside: avoid;
    }
}

/* ===== 减少运动 ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}

/* ===== 滚动揭示动画 ===== */
.will-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition:
        opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.will-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* 依次延迟 */
.main-title.will-reveal { transition-delay: 0ms; }
.section.will-reveal:nth-of-type(1) { transition-delay: 60ms; }
.section.will-reveal:nth-of-type(2) { transition-delay: 120ms; }
.section.will-reveal:nth-of-type(3) { transition-delay: 180ms; }
.section.will-reveal:nth-of-type(4) { transition-delay: 240ms; }

@media (prefers-reduced-motion: reduce) {
    .will-reveal {
        opacity: 1;
        transform: none;
    }
}