@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700&family=Noto+Serif+TC:wght@400;600;900&family=Oswald:wght@500;700&display=swap');

:root {
    --bg: #030305;
    --bg-soft: #0a0a0f;
    --surface: rgba(255, 255, 255, 0.03);
    --surface-strong: rgba(255, 255, 255, 0.06);
    --surface-solid: #121215;
    --text: #e2e8f0;
    --text-strong: #ffffff;
    --muted: #94a3b8;
    --line: rgba(255, 255, 255, 0.08);

    --accent-purple: #8b5cf6;
    --accent-teal: #14b8a6;
    --accent-blue: #3b82f6;
    --accent-gold: #f59e0b;
    --accent-magenta: #d946ef;

    /* Typography */
    --font-body: 'Noto Sans TC', system-ui, -apple-system, sans-serif;
    --font-heading: 'Noto Serif TC', serif;
    --font-number: 'Oswald', sans-serif;

    --radius-xl: 32px;
    --radius-lg: 20px;
    --radius-md: 12px;

    --content-w: 1200px;
}

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

html {
    scroll-behavior: smooth;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 16px; 
    line-height: 2; /* 更好的中文行高 */
    letter-spacing: 0.03em; /* 舒適的預設字距 */
}

body { overflow-x: hidden; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.3;
    font-weight: 600;
    color: var(--text-strong);
    letter-spacing: 0.06em; /* 標題稍微拉得更開 */
    text-wrap: balance; /* 避免單字掉到下一行 */
}

/* 針對閱讀區塊的優化 */
.reading-text p {
    font-size: 1.125rem; /* 18px */
    color: var(--text);
    max-width: 38em; /* 限制單行字數約 38-40 個中文字，最適合排版閱讀 */
    margin-bottom: 1.5em;
    font-weight: 300;
    text-wrap: pretty; /* 盡量不讓最後一行只有一兩個字 (孤字控制) */
}
.reading-text p:last-child {
    margin-bottom: 0;
}
.reading-text strong {
    font-weight: 500;
    color: var(--text-strong);
    border-bottom: 1px solid rgba(255,255,255,0.3);
}

/* Utilities */
.container {
    max-width: var(--content-w);
    margin: 0 auto;
    padding: 0 24px;
}

/* Nav */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    padding: 20px 0;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: linear-gradient(180deg, rgba(3, 3, 5, 0.9), transparent);
    border-bottom: 1px solid var(--line);
    transition: padding 0.3s ease, background 0.3s ease;
}
nav.scrolled {
    padding: 12px 0;
    background: rgba(3, 3, 5, 0.98);
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--content-w);
    margin: 0 auto;
    padding: 0 24px;
}
.logo {
    font-family: var(--font-number);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.15em;    
    background: linear-gradient(90deg, var(--accent-purple), var(--accent-teal));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.nav-links {
    display: flex;
    gap: 32px;
    font-size: 0.95rem;
    color: var(--muted);
}
.nav-links a {
    position: relative;
    padding-bottom: 4px;
    transition: color 0.3s ease;
}
.nav-links a:hover {
    color: var(--text-strong);
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 1px;
    background: var(--accent-teal);
    transition: width 0.3s ease;
}
.nav-links a:hover::after {
    width: 100%;
}

/* Progress bar */
.progress-container {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 1px;
    background: transparent;
}
.progress-bar {
    height: 1px;
    background: var(--accent-teal);
    width: 0%;
}

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding-top: 80px;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    object-fit: cover;
    width: 100%;
    height: 100%;
    opacity: 0.4;
    z-index: -1;
    mix-blend-mode: screen;
    filter: saturate(1.2) contrast(1.1);
    transform-origin: center;
}
.hero-content {
    max-width: 900px;
    position: relative;
    z-index: 2;
}
.hero-eyebrow {
    font-family: var(--font-number);
    display: inline-block;
    padding: 6px 16px;
    border: 1px solid rgba(139, 92, 246, 0.4);
    border-radius: 99px;
    font-size: 0.85rem;
    color: #a78bfa;
    margin-bottom: 32px;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    background: rgba(139, 92, 246, 0.05);
    backdrop-filter: blur(10px);
}
.hero h1 {
    font-size: clamp(3rem, 6vw, 5.5rem);
    margin-bottom: 32px;
    text-shadow: 0 10px 30px rgba(0,0,0,0.8);
    font-weight: 900;
}
.hero .hero-intro {
    font-size: clamp(1.1rem, 1.5vw, 1.3rem);
    color: var(--muted);
    max-width: 42ch;
    font-weight: 300;
    line-height: 1.8;
}

.hero-card {
    margin-top: 56px;
    background: rgba(10, 10, 15, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid var(--line);
    padding: 40px;
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--accent-teal);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}
.hero-card p {
    font-size: 1.15rem;
    color: #f1f5f9;
    max-width: 100%;
    line-height: 1.8;
}

/* Sections */
section {
    padding: 140px 0;
    position: relative;
}
.section-header {
    margin-bottom: 80px;
}
.section-no {
    font-family: var(--font-number);
    font-size: 1.25rem;
    color: var(--accent-teal);
    letter-spacing: 0.15em;
    margin-bottom: 16px;
    display: block;
}
.section-title {
    font-size: 2.5rem;
    margin-bottom: 24px;
}
.section-desc {
    color: var(--muted);
    font-size: 1.15rem;
    max-width: 36em;
    line-height: 1.8;
}

/* Reveal Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.active {
    opacity: 1;
    transform: translateY(0);
}
.delay-100 { transition-delay: 100ms; }
.delay-200 { transition-delay: 200ms; }
.delay-300 { transition-delay: 300ms; }

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 32px;
}
.bento-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    padding: 48px;
    transition: transform 0.4s ease, border-color 0.4s ease, background 0.4s ease;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}
.bento-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255,255,255,0.15);
    background: var(--surface-strong);
}

.bento-sys-1 {
    grid-column: span 12;
    background: linear-gradient(135deg, rgba(20,20,30,0.6), rgba(10,10,15,0.8));
    border-top: 1px solid var(--accent-blue);
}
.bento-sys-2 {
    grid-column: span 6;
}
.bento-sys-3 {
    grid-column: span 6;
    border-right: 1px solid var(--accent-purple);
}

.card-title {
    font-size: 1.75rem;
    margin-bottom: 32px;
    color: #fff;
}

/* Timeline */
.timeline-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}
.timeline-container::before {
    content: '';
    position: absolute;
    left: 40px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--line) 10%, var(--line) 90%, transparent);
}
.timeline-item {
    position: relative;
    padding-left: 96px;
    margin-bottom: 80px;
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: 32px;
    top: 8px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--accent-teal);
    z-index: 2;
    transition: all 0.3s ease;
}
.timeline-item:hover::before {
    background: var(--accent-teal);
    box-shadow: 0 0 20px var(--accent-teal);
    transform: scale(1.2);
}
.timeline-card {
    background: var(--surface);
    border: 1px solid var(--line);
    padding: 48px;
    border-radius: var(--radius-lg);
    transition: background 0.3s ease;
}
.timeline-card:hover {
    background: var(--surface-strong);
}
.timeline-card h3 {
    font-size: 1.75rem;
    margin-bottom: 32px;
    color: #f8fafc;
}

/* Data Dashboard */
.data-section {
    background: #06090e;
    border-top: 1px solid rgba(59, 130, 246, 0.15);
    border-bottom: 1px solid rgba(59, 130, 246, 0.15);
    position: relative;
    overflow: hidden;
    padding: 160px 0;
}
.data-bg {
    position: absolute;
    inset: 0;
    object-fit: cover;
    opacity: 0.1;
    z-index: 0;
    mix-blend-mode: screen;
    width: 100%;
    height: 100%;
}
.data-inner {
    position: relative;
    z-index: 1;
}
.data-panel {
    border: 1px solid rgba(59, 130, 246, 0.2);
    background: rgba(3, 5, 10, 0.7);
    backdrop-filter: blur(16px);
    border-radius: 8px; /* 更科技硬朗的倒角 */
    padding: 56px;
    max-width: 1000px;
    margin: 0 auto;
}
.data-panel h3 {
    color: var(--accent-teal);
    font-family: var(--font-number);
    font-size: 1.25rem;
    letter-spacing: 0.1em;
    margin-bottom: 32px;
    border-bottom: 1px dashed rgba(59,130,246,0.3);
    padding-bottom: 16px;
}

/* Soft Emotion */
.emotion-section {
    position: relative;
    padding: 240px 0;
    overflow: hidden;
}
.emotion-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    mix-blend-mode: color-dodge;
    filter: blur(8px);
    z-index: 0;
    transform-origin: center;
}
.emotion-canvas {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 120px;
    align-items: center;
}
.soft-card {
    width: 100%;
    max-width: 720px;
    background: rgba(15, 8, 20, 0.6);
    backdrop-filter: blur(40px);
    border: 1px solid rgba(217, 70, 239, 0.15);
    border-radius: 48px;
    padding: 64px;
    box-shadow: 0 40px 80px rgba(0,0,0,0.6), inset 0 0 60px rgba(217, 70, 239, 0.05);
}
.soft-card.offset-left {
    margin-right: 15%;
    border-left: 2px solid rgba(217, 70, 239, 0.5);
}
.soft-card.offset-right {
    margin-left: 15%;
    border-right: 2px solid rgba(245, 158, 11, 0.5);
}
.soft-card h3 {
    font-size: 2.25rem;
    color: #fdf4ff;
    margin-bottom: 40px;
}
.soft-highlight {
    background: linear-gradient(90deg, transparent, rgba(217, 70, 239, 0.1), transparent);
    padding: 16px 24px;
    border-radius: 12px;
    border-left: 3px solid var(--accent-magenta);
    font-style: normal;
    color: #fff;
}
.soft-highlight p {
    margin-bottom: 0 !important;
}

/* Quote Block */
.quote-section {
    display: flex;
    justify-content: center;
    padding: 200px 0;
}
.quote-box {
    max-width: 900px;
    text-align: center;
    position: relative;
}
.quote-icon {
    font-size: 8rem;
    color: rgba(255,255,255,0.05);
    position: absolute;
    top: -80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: -1;
    line-height: 1;
    font-family: serif;
}
.quote-box h3 {
    font-size: 1.75rem;
    margin-bottom: 40px;
    color: #d8b4fe;
}
.quote-box .reading-text p {
    margin-left: auto;
    margin-right: auto;
}

/* Big Typography */
.marquee-container {
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 120px 0;
    background: var(--surface);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}
.marquee-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    background: linear-gradient(135deg, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 64px;
}

/* Dark Focus */
.dark-focus {
    background: #000;
    padding: 240px 0;
    text-align: center;
    border-top: 1px solid #111;
}
.dark-focus h3 {
    font-size: 3rem;
    color: #fff;
    margin-bottom: 56px;
}
.dark-focus .reading-text p {
    margin-left: auto;
    margin-right: auto;
}
.dark-focus .punchline {
    font-size: 1.75rem;
    color: var(--accent-gold);
    margin-top: 64px;
    border: 1px solid rgba(245,158,11,0.2);
    display: inline-block;
    padding: 32px 64px;
    border-radius: 999px;
    line-height: 1.6;
    font-family: var(--font-heading);
    box-shadow: 0 0 40px rgba(245,158,11,0.05);
}

/* Conclusion */
.conclusion {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(circle at center, rgba(139, 92, 246, 0.08) 0%, #000 70%);
    padding: 0 24px;
}
.conclusion-content {
    max-width: 1000px;
}
.conclusion .hero-eyebrow {
    margin-bottom: 48px;
}
.conclusion .final-q {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    color: #fff;
    margin-top: 80px;
    text-shadow: 0 0 60px rgba(255,255,255,0.2);
}

/* Footer */
footer {
    text-align: center;
    padding: 64px 24px;
    border-top: 1px solid #111;
    color: var(--muted);
    font-family: var(--font-number);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    background: #000;
}

/* 手機版專用語義斷行 */
.mobile-br {
    display: none;
}

/* Responsive */
@media (max-width: 900px) {
    .bento-sys-2, .bento-sys-3 { grid-column: span 12; }
    .bento-sys-3 { border-right: none; border-left: 1px solid var(--accent-purple); }
    
    .soft-card.offset-left, .soft-card.offset-right { margin: 0; }
    
    .timeline-container::before { left: 24px; }
    .timeline-item { padding-left: 64px; margin-bottom: 64px; }
    .timeline-item::before { left: 16px; top: 12px;}
    .timeline-card { padding: 32px; }
    
    .bento-card, .data-panel, .soft-card { padding: 40px 32px; }
    
    section { padding: 80px 0; }
    .emotion-section, .dark-focus, .quote-section { padding: 120px 0; }
}
@media (max-width: 600px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 2.5rem; text-wrap: balance; }
    .hero-card { padding: 32px 24px; margin-top: 32px; }
    .reading-text p { font-size: 1.05rem; letter-spacing: 0.04em; text-align: justify; }
    .data-panel, .bento-card { padding: 32px 24px; }
    .punchline { font-size: 1.25rem !important; padding: 24px 32px !important; }
    .final-q { font-size: 2rem !important; margin-top: 48px !important; }
    .mobile-br { display: block; } /* 手機版才強制斷行 */
}