/* ========== Design Tokens ========== */
:root {
    --bg-primary: #f5f5f7;
    --bg-secondary: #ffffff;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-tertiary: #86868b;
    --accent-blue: #0071e3;
    --accent-blue-hover: #0077ed;
    --accent-purple: #5e5ce6;
    --accent-pink: #ff375f;
    --accent-orange: #ff9f0a;
    --accent-green: #30d158;
    --fill-quiet: rgba(0, 0, 0, 0.05);
    --fill-quiet-hover: rgba(0, 0, 0, 0.08);

    --glass-bg: rgba(255, 255, 255, 0.5);
    --glass-bg-thick: rgba(255, 255, 255, 0.65);
    --glass-bg-hover: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.6);
    --glass-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    --glass-shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.12);

    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --radius-xl: 40px;
    --radius-pill: 980px;

    --ease-out: cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-fast: 150ms var(--ease-out);
    --transition-base: 300ms var(--ease-out);

    --font-stack: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;

    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-stack);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* ========== 动态背景层 ========== */
.bg-stage {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.5;
    will-change: transform;
}

.orb-1 {
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, #5e5ce6 0%, transparent 65%);
    top: -250px;
    left: -200px;
    animation: orb-float-1 20s ease-in-out infinite;
}

.orb-2 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #ff375f 0%, transparent 65%);
    top: 30%;
    right: -150px;
    animation: orb-float-2 25s ease-in-out infinite;
}

.orb-3 {
    width: 650px;
    height: 650px;
    background: radial-gradient(circle, #ff9f0a 0%, transparent 65%);
    bottom: -200px;
    left: 25%;
    animation: orb-float-3 30s ease-in-out infinite;
}

.orb-4 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #30d158 0%, transparent 65%);
    top: 60%;
    left: -100px;
    animation: orb-float-4 22s ease-in-out infinite;
}

@keyframes orb-float-1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(100px, 80px) scale(1.1); }
    66% { transform: translate(-50px, 120px) scale(0.95); }
}

@keyframes orb-float-2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-120px, -80px) scale(1.15); }
}

@keyframes orb-float-3 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(80px, -100px) scale(0.9); }
}

@keyframes orb-float-4 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(60px, -60px) scale(1.1); }
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.noise-overlay {
    position: absolute;
    inset: 0;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.float-particles {
    position: absolute;
    inset: 0;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(94, 92, 230, 0.3), transparent);
    filter: blur(2px);
    animation: particle-float 15s ease-in-out infinite;
}

.p1 { width: 12px; height: 12px; top: 15%; left: 10%; animation-delay: 0s; }
.p2 { width: 18px; height: 18px; top: 25%; left: 80%; animation-delay: 2s; background: radial-gradient(circle, rgba(255, 55, 95, 0.3), transparent); }
.p3 { width: 8px; height: 8px; top: 45%; left: 20%; animation-delay: 4s; background: radial-gradient(circle, rgba(255, 159, 10, 0.3), transparent); }
.p4 { width: 14px; height: 14px; top: 60%; left: 70%; animation-delay: 1s; background: radial-gradient(circle, rgba(48, 209, 88, 0.3), transparent); }
.p5 { width: 10px; height: 10px; top: 75%; left: 30%; animation-delay: 3s; }
.p6 { width: 16px; height: 16px; top: 85%; left: 85%; animation-delay: 5s; background: radial-gradient(circle, rgba(255, 55, 95, 0.3), transparent); }
.p7 { width: 9px; height: 9px; top: 35%; left: 50%; animation-delay: 6s; background: radial-gradient(circle, rgba(255, 159, 10, 0.3), transparent); }
.p8 { width: 13px; height: 13px; top: 55%; left: 5%; animation-delay: 7s; background: radial-gradient(circle, rgba(48, 209, 88, 0.3), transparent); }

@keyframes particle-float {
    0%, 100% { transform: translate(0, 0); opacity: 0.6; }
    50% { transform: translate(30px, -40px); opacity: 1; }
}

.cursor-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 400px;
    height: 400px;
    margin: -200px 0 0 -200px;
    background: radial-gradient(circle, rgba(94, 92, 230, 0.1) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 1;
    will-change: transform;
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    z-index: 1001;
    background: transparent;
    pointer-events: none;
}

.scroll-progress span {
    display: block;
    height: 100%;
    width: 0%;
    background: linear-gradient(to right, var(--accent-blue), var(--accent-purple), var(--accent-pink));
    transition: width 80ms linear;
}

/* ========== 液态玻璃材质 ========== */
.liquid-glass {
    position: relative;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    box-shadow:
        inset 2px -2px 1px -1px rgba(255, 255, 255, 0.9),
        inset -2px 2px 1px -1px rgba(255, 255, 255, 0.9),
        inset 6px -6px 1px -6px rgba(255, 255, 255, 0.55),
        inset -6px 6px 1px -6px rgba(255, 255, 255, 0.55),
        inset 0 0 2px rgba(0, 0, 0, 0.15),
        0 8px 32px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.liquid-glass::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(
        45deg,
        rgba(255, 255, 255, 0.4) 0%,
        transparent 25%,
        transparent 75%,
        rgba(255, 255, 255, 0.4) 100%
    );
    pointer-events: none;
    z-index: 1;
}

.liquid-glass::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 1px solid rgba(0, 0, 0, 0.08);
    filter: blur(2px);
    pointer-events: none;
    z-index: 0;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    position: relative;
    transition: background-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 24px;
    right: 24px;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.7) 50%, transparent 100%);
    pointer-events: none;
}

/* ========== 全局旅程进度指示器（3D 固定右侧） ========== */
.journey-rail {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    padding: 20px 14px;
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
    box-shadow:
        inset 2px -2px 1px -1px rgba(255, 255, 255, 0.9),
        inset -2px 2px 1px -1px rgba(255, 255, 255, 0.9),
        0 12px 40px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    perspective: 600px;
}

.rail-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    writing-mode: vertical-rl;
    text-orientation: upright;
    margin-bottom: 4px;
}

.rail-track {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 8px 0;
}

.rail-line {
    position: absolute;
    top: 16px;
    bottom: 16px;
    left: 50%;
    width: 2px;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 1px;
    z-index: 0;
}

.rail-node {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    transform-style: preserve-3d;
    transition: transform var(--transition-fast);
}

.rail-node:hover {
    transform: translateZ(8px);
}

.rail-node-inner {
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow:
        inset 1px -1px 2px rgba(255, 255, 255, 0.9),
        0 4px 12px rgba(0, 0, 0, 0.1);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.rail-node.active .rail-node-inner {
    background: var(--accent-blue);
    color: #fff;
    box-shadow: 0 4px 16px rgba(0, 113, 227, 0.5), inset 1px -1px 2px rgba(255, 255, 255, 0.3);
    transform: scale(1.15);
}

.rail-node.done .rail-node-inner {
    background: var(--accent-green);
    color: #fff;
    box-shadow: 0 4px 16px rgba(48, 209, 88, 0.5), inset 1px -1px 2px rgba(255, 255, 255, 0.3);
}

.rail-node.done .rail-node-inner::after {
    content: '✓';
    position: absolute;
    font-size: 16px;
}

.rail-node.done .rail-node-inner {
    font-size: 0;
}

.rail-node-label {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.rail-node.active .rail-node-label,
.rail-node.done .rail-node-label {
    color: var(--text-primary);
}

.rail-percent {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent-blue);
    margin-top: 4px;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 12px 0;
    background: rgba(245, 245, 247, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.nav-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 16px;
    letter-spacing: -0.01em;
}

.brand-mark {
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-sm);
    color: #fff;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
    font-size: 15px;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(94, 92, 230, 0.3);
}

.nav-links {
    display: flex;
    gap: 2px;
}

.nav-link {
    padding: 8px 14px;
    font-size: 14px;
    color: var(--text-secondary);
    border-radius: var(--radius-pill);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--fill-quiet);
}

.nav-link.active {
    color: var(--text-primary);
    font-weight: 500;
}

.nav-cta {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--accent-blue);
    border-radius: var(--radius-pill);
    transition: background-color var(--transition-fast);
}

.nav-cta:hover {
    background: rgba(0, 113, 227, 0.08);
}

/* ========== Main ========== */
main {
    position: relative;
    z-index: 2;
    padding-top: 56px;
}

/* ========== Hero ========== */
.hero {
    min-height: calc(100vh - 56px);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 32px;
}

.hero-inner {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--accent-blue);
    letter-spacing: 0.01em;
}

.eyebrow-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-blue);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(40px, 5.5vw, 72px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    font-optical-sizing: auto;
}

.hero-subtitle {
    font-size: clamp(17px, 2vw, 20px);
    line-height: 1.6;
    color: var(--text-secondary);
    letter-spacing: -0.005em;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-top: 32px;
    padding: 24px 0;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.hero-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.hero-stat-number {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.hero-stat-label {
    font-size: 13px;
    color: var(--text-tertiary);
}

.hero-stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(0, 0, 0, 0.1);
}

.hero-visual {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1200px;
}

.visual-scene {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

.visual-orb {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 320px;
    height: 320px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    background: conic-gradient(from 0deg, #5e5ce6, #ff375f, #ff9f0a, #30d158, #5e5ce6);
    filter: blur(40px);
    opacity: 0.35;
    animation: orb-rotate 20s linear infinite;
}

@keyframes orb-rotate {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.visual-card {
    position: absolute;
    width: 240px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
    box-shadow:
        inset 2px -2px 1px -1px rgba(255, 255, 255, 0.9),
        inset -2px 2px 1px -1px rgba(255, 255, 255, 0.9),
        0 12px 40px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    gap: 8px;
    transform-style: preserve-3d;
    transition: transform 0.2s var(--ease-out);
    overflow: hidden;
}

.visual-card-1 {
    top: 20px;
    left: 10%;
    transform: rotateZ(-4deg);
    animation: card-float-1 6s ease-in-out infinite;
}

.visual-card-2 {
    top: 180px;
    right: 5%;
    transform: rotateZ(3deg);
    animation: card-float-2 7s ease-in-out infinite;
}

.visual-card-3 {
    bottom: 40px;
    left: 20%;
    transform: rotateZ(-2deg);
    animation: card-float-3 8s ease-in-out infinite;
}

@keyframes card-float-1 {
    0%, 100% { transform: rotateZ(-4deg) translateY(0); }
    50% { transform: rotateZ(-4deg) translateY(-12px); }
}

@keyframes card-float-2 {
    0%, 100% { transform: rotateZ(3deg) translateY(0); }
    50% { transform: rotateZ(3deg) translateY(-16px); }
}

@keyframes card-float-3 {
    0%, 100% { transform: rotateZ(-2deg) translateY(0); }
    50% { transform: rotateZ(-2deg) translateY(-10px); }
}

.card-shine {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.3) 0%, transparent 100%);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    pointer-events: none;
}

.visual-card-tag {
    font-size: 12px;
    font-weight: 500;
    color: var(--accent-blue);
    letter-spacing: 0.02em;
    position: relative;
    z-index: 2;
}

.visual-card strong {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    line-height: 1.3;
    position: relative;
    z-index: 2;
}

.visual-card-meta {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 4px;
    position: relative;
    z-index: 2;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 16px;
    font-weight: 400;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: background-color var(--transition-fast), transform 100ms var(--ease-out);
    border: none;
    font-family: inherit;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--accent-blue);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-blue-hover);
}

.btn-secondary {
    background: var(--fill-quiet);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--fill-quiet-hover);
}

.btn-icon {
    width: 16px;
    height: 16px;
}

.btn-large {
    padding: 18px 36px;
    font-size: 17px;
}

/* ========== Section header ========== */
.section-header {
    text-align: center;
    margin-bottom: 56px;
    padding: 0 32px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.section-eyebrow {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 10px;
    letter-spacing: 0.02em;
}

.section-title {
    font-size: clamp(32px, 4.5vw, 52px);
    font-weight: 600;
    line-height: 1.08;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-intro {
    font-size: 18px;
    line-height: 1.5;
    color: var(--text-secondary);
    letter-spacing: -0.005em;
}

/* ========== Stats section ========== */
.stats-section {
    padding: 80px 32px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-card {
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.stat-card:hover {
    background: var(--glass-bg-hover);
    box-shadow: var(--glass-shadow-hover);
}

.stat-icon {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(94, 92, 230, 0.1), rgba(255, 55, 95, 0.1));
    color: var(--accent-purple);
}

.stat-icon svg {
    width: 22px;
    height: 22px;
}

.stat-number {
    font-size: clamp(28px, 3.5vw, 38px);
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========== Themes section ========== */
.themes-section {
    padding: 100px 32px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.themes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.theme-card {
    padding: 36px 32px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.theme-card:hover {
    background: var(--glass-bg-hover);
    box-shadow: var(--glass-shadow-hover);
}

.theme-card-wide {
    grid-column: span 2;
}

.theme-number {
    flex-shrink: 0;
    font-size: 48px;
    font-weight: 600;
    color: var(--text-tertiary);
    letter-spacing: -0.03em;
    line-height: 1;
    font-optical-sizing: auto;
    opacity: 0.5;
}

.theme-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.theme-tag {
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--accent-blue);
    background: rgba(0, 113, 227, 0.08);
    border-radius: var(--radius-pill);
    align-self: flex-start;
}

.theme-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.015em;
    line-height: 1.3;
}

.theme-desc {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
    letter-spacing: -0.005em;
}

.theme-stats {
    display: flex;
    gap: 16px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.theme-stats span {
    font-size: 13px;
    color: var(--text-tertiary);
    padding: 6px 12px;
    background: var(--fill-quiet);
    border-radius: var(--radius-pill);
}

/* ========== Videos section ========== */
.videos-section {
    padding: 100px 32px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.videos-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.video-row {
    display: grid;
    grid-template-columns: 60px 100px 1fr 40px;
    gap: 24px;
    align-items: center;
    padding: 20px 28px;
    transition: background-color var(--transition-fast), transform 100ms var(--ease-out);
}

.video-row:hover {
    background: var(--glass-bg-hover);
}

.video-row:active {
    transform: scale(0.99);
}

.video-rank {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-tertiary);
    letter-spacing: -0.02em;
    line-height: 1;
    font-optical-sizing: auto;
}

.video-thumb {
    position: relative;
    width: 100px;
    height: 60px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--g1, #5e5ce6), var(--g2, #ff375f));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.video-thumb-tag {
    font-size: 11px;
    font-weight: 500;
    color: #fff;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.video-duration {
    position: absolute;
    bottom: 4px;
    right: 4px;
    padding: 2px 6px;
    font-size: 11px;
    font-weight: 500;
    color: #fff;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 4px;
    backdrop-filter: blur(4px);
}

.video-info {
    min-width: 0;
}

.video-title {
    font-size: 17px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.video-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-tertiary);
}

.video-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.video-arrow svg {
    width: 18px;
    height: 18px;
}

.video-row:hover .video-arrow {
    color: var(--accent-blue);
    transform: translateX(4px);
}

.videos-more {
    text-align: center;
    margin-top: 40px;
}

/* ========== Style section ========== */
.style-section {
    padding: 100px 32px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.style-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.style-card {
    padding: 36px 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.style-card:hover {
    background: var(--glass-bg-hover);
    box-shadow: var(--glass-shadow-hover);
}

.style-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(94, 92, 230, 0.12), rgba(255, 55, 95, 0.12));
    color: var(--accent-purple);
}

.style-icon svg {
    width: 26px;
    height: 26px;
}

.style-title {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.style-desc {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
    letter-spacing: -0.005em;
    flex: 1;
}

.style-bar {
    margin-top: 8px;
}

.style-bar-fill {
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    width: 0;
    transition: width 1.2s var(--ease-out);
}

.style-card.visible .style-bar-fill {
    width: var(--w);
}

.style-bar-label {
    display: block;
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-tertiary);
}

/* ========== Map section ========== */
.map-section {
    padding: 100px 32px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.map-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    max-width: 720px;
    margin: 0 auto;
}

.map-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-pill);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    transition: transform var(--transition-fast), background-color var(--transition-fast);
    cursor: default;
}

.map-chip:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.6);
}

.map-chip-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
}

/* ========== 游戏区块通用（贯穿整页） ========== */
.game-section {
    padding: 80px 32px;
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
}

.game-header {
    text-align: center;
    margin-bottom: 48px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.chapter-tag {
    display: inline-block;
    padding: 6px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-purple);
    background: rgba(94, 92, 230, 0.12);
    border-radius: var(--radius-pill);
    margin-bottom: 16px;
    letter-spacing: 0.02em;
    border: 1px solid rgba(94, 92, 230, 0.2);
}

/* 游戏1：3D 省份翻转卡片 */
.province-3d-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 880px;
    margin: 0 auto;
}

.province-3d {
    aspect-ratio: 1;
    padding: 0;
    border: none;
    background: none;
    cursor: pointer;
    perspective: 1000px;
    transition: transform var(--transition-fast);
}

.province-3d:hover {
    transform: translateY(-4px);
}

.province-3d-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 0.6s var(--ease-out);
}

.province-3d.flipped .province-3d-inner {
    transform: rotateY(180deg);
}

.province-3d-front,
.province-3d-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 24px;
    text-align: center;
}

.province-3d-front {
    z-index: 2;
}

.province-3d-back {
    transform: rotateY(180deg);
}

.province-3d-back p {
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-secondary);
    position: relative;
    z-index: 2;
}

.province-emoji {
    font-size: 40px;
    line-height: 1;
    position: relative;
    z-index: 2;
}

.province-3d-front strong,
.province-3d-back strong {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    z-index: 2;
}

.province-desc {
    font-size: 13px;
    color: var(--text-tertiary);
    position: relative;
    z-index: 2;
}

.province-choose {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-blue);
    margin-top: 8px;
    position: relative;
    z-index: 2;
}

.province-3d.province-selected .province-3d-back {
    background: rgba(0, 113, 227, 0.2);
    border-color: var(--accent-blue);
}

/* 游戏2：方言连线 */
.game-match-board {
    display: grid;
    grid-template-columns: 1fr 80px 1fr;
    gap: 24px;
    max-width: 720px;
    margin: 0 auto;
    align-items: center;
}

.match-column {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.match-item {
    padding: 18px 24px;
    text-align: center;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-fast);
    position: relative;
    z-index: 2;
}

.match-item:hover {
    transform: scale(1.03);
    background: rgba(255, 255, 255, 0.45);
}

.match-item.selected {
    background: rgba(0, 113, 227, 0.2);
    border-color: var(--accent-blue);
}

.match-item.matched {
    background: rgba(48, 209, 88, 0.2);
    border-color: var(--accent-green);
    cursor: default;
    opacity: 0.7;
}

.match-item.wrong {
    background: rgba(255, 55, 95, 0.2);
    border-color: var(--accent-pink);
    animation: shake 0.4s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
}

.match-connector {
    position: relative;
    height: 240px;
}

.match-svg {
    width: 100%;
    height: 100%;
}

/* 游戏3：记忆翻牌 */
.game-memory-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    max-width: 600px;
    margin: 0 auto;
}

.memory-card {
    aspect-ratio: 1;
    cursor: pointer;
    padding: 0;
    border: none;
    background: transparent;
    perspective: 800px;
    position: relative;
}

.memory-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 0.5s var(--ease-out);
    border-radius: var(--radius-md);
}

.memory-card.flipped .memory-card-inner,
.memory-card.matched .memory-card-inner {
    transform: rotateY(180deg);
}

.memory-card-front,
.memory-card-back {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--radius-md);
    font-size: 32px;
    font-weight: 600;
}

.memory-card-front {
    color: var(--accent-purple);
}

.memory-card-back {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transform: rotateY(180deg);
    color: var(--text-primary);
}

.memory-card.matched .memory-card-back {
    background: rgba(48, 209, 88, 0.3);
    border-color: var(--accent-green);
}

.game-stats-row {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 24px;
    font-size: 15px;
    color: var(--text-secondary);
}

.game-stats-row strong {
    color: var(--accent-blue);
    font-weight: 600;
}

/* 游戏4：是非判断 */
.game-quiz {
    max-width: 600px;
    margin: 0 auto;
}

.quiz-card {
    padding: 40px 32px;
    text-align: center;
}

.quiz-progress {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.quiz-question {
    font-size: 20px;
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: 28px;
    font-weight: 500;
    position: relative;
    z-index: 2;
}

.quiz-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    position: relative;
    z-index: 2;
}

.quiz-btn {
    padding: 14px 40px;
    font-size: 17px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-fast);
    font-family: inherit;
}

.quiz-btn:active {
    transform: scale(0.95);
}

.quiz-yes {
    background: var(--accent-green);
    color: #fff;
}

.quiz-yes:hover {
    background: #28b84c;
}

.quiz-no {
    background: var(--accent-pink);
    color: #fff;
}

.quiz-no:hover {
    background: #e62e51;
}

.quiz-result {
    padding: 40px 32px;
    text-align: center;
}

.quiz-result h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    position: relative;
    z-index: 2;
}

.quiz-result p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    position: relative;
    z-index: 2;
}

.quiz-result-desc {
    font-size: 15px !important;
    color: var(--text-tertiary) !important;
    font-style: italic;
}

/* 游戏反馈 */
.game-feedback {
    text-align: center;
    margin-top: 24px;
    padding: 12px 24px;
    border-radius: var(--radius-pill);
    font-size: 15px;
    font-weight: 500;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.game-feedback.feedback-show {
    opacity: 1;
    transform: translateY(0);
}

.feedback-success {
    background: rgba(48, 209, 88, 0.15);
    color: var(--accent-green);
}

.feedback-error {
    background: rgba(255, 55, 95, 0.15);
    color: var(--accent-pink);
}

/* 旅程完成 */
.chapter-complete {
    text-align: center;
    padding: 60px 40px;
    position: relative;
    max-width: 720px;
    margin: 0 auto;
}

.complete-burst {
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(255, 159, 10, 0.4) 0%, transparent 70%);
    border-radius: 50%;
    animation: burst-pulse 2s ease-in-out infinite;
}

@keyframes burst-pulse {
    0%, 100% { transform: translateX(-50%) scale(1); opacity: 0.6; }
    50% { transform: translateX(-50%) scale(1.3); opacity: 1; }
}

.chapter-complete .chapter-tag {
    position: relative;
    z-index: 2;
}

.chapter-title {
    font-size: clamp(28px, 3.5vw, 40px);
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    line-height: 1.2;
    position: relative;
    z-index: 2;
}

.chapter-story {
    font-size: 17px;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 24px;
    position: relative;
    z-index: 2;
}

.chapter-complete .btn {
    margin: 8px;
    position: relative;
    z-index: 2;
}

/* ========== Visit section ========== */
.visit-section {
    padding: 100px 32px 120px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.visit-card {
    position: relative;
    padding: 80px 48px;
    text-align: center;
    overflow: hidden;
}

.visit-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 600px;
    height: 600px;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(94, 92, 230, 0.2) 0%, transparent 60%);
    filter: blur(40px);
    pointer-events: none;
}

.visit-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.visit-eyebrow {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-blue);
    letter-spacing: 0.02em;
}

.visit-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.025em;
    line-height: 1.1;
}

.visit-desc {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    max-width: 480px;
}

/* ========== Footer ========== */
.footer {
    position: relative;
    z-index: 2;
    padding: 40px 32px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    background: rgba(245, 245, 247, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.footer-brand strong {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.footer-brand p {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.footer-links {
    display: flex;
    gap: 16px;
}

.footer-links a {
    font-size: 14px;
    color: var(--accent-blue);
    font-weight: 400;
    transition: opacity var(--transition-fast);
}

.footer-links a:hover {
    opacity: 0.7;
}

/* ========== Reveal animation ========== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

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

/* ========== Responsive ========== */
@media (max-width: 1100px) {
    .journey-rail {
        right: 12px;
        padding: 16px 10px;
    }
}

@media (max-width: 968px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 60px 24px;
    }

    .hero-visual {
        min-height: 400px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .theme-card-wide {
        grid-column: auto;
    }

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

    .nav-links {
        display: none;
    }

    .nav-content {
        padding: 0 20px;
    }

    .video-row {
        grid-template-columns: 40px 80px 1fr 32px;
        gap: 16px;
        padding: 16px 20px;
    }

    .video-rank {
        font-size: 24px;
    }

    .video-title {
        font-size: 15px;
    }

    /* 移动端旅程进度指示器移到底部 */
    .journey-rail {
        right: 50%;
        top: auto;
        bottom: 16px;
        transform: translateX(50%);
        flex-direction: row;
        padding: 10px 16px;
        gap: 10px;
        border-radius: var(--radius-pill);
    }

    .rail-title {
        writing-mode: horizontal-tb;
        text-orientation: mixed;
        margin-bottom: 0;
        margin-right: 4px;
    }

    .rail-track {
        flex-direction: row;
        gap: 12px;
        padding: 0;
    }

    .rail-line {
        top: 50%;
        bottom: auto;
        left: 16px;
        right: 16px;
        width: auto;
        height: 2px;
        transform: translateY(-50%);
    }

    .rail-node-label {
        display: none;
    }

    .rail-percent {
        margin-top: 0;
        font-size: 12px;
    }

    .province-3d-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .game-match-board {
        grid-template-columns: 1fr 40px 1fr;
        gap: 12px;
    }

    .match-item {
        padding: 14px 16px;
        font-size: 14px;
    }

    .game-memory-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .hero-stat-divider {
        width: 100%;
        height: 1px;
    }

    .visual-card {
        width: 200px;
        padding: 20px;
    }

    .video-row {
        grid-template-columns: 32px 1fr;
        gap: 12px;
    }

    .video-thumb,
    .video-arrow {
        display: none;
    }

    .btn {
        padding: 12px 24px;
        font-size: 15px;
    }

    .btn-large {
        padding: 16px 32px;
        font-size: 16px;
    }

    .visit-card {
        padding: 48px 24px;
    }

    .province-3d-grid {
        grid-template-columns: 1fr;
    }

    .game-match-board {
        grid-template-columns: 1fr;
    }

    .match-connector {
        display: none;
    }

    .game-memory-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .chapter-complete {
        padding: 40px 24px;
    }
}

/* ========== Accessibility ========== */
@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 {
        opacity: 1;
        transform: none;
    }

    .orb, .visual-orb, .visual-card, .eyebrow-dot, .particle, .complete-burst {
        animation: none !important;
    }
}

@media (prefers-reduced-transparency: reduce) {
    .liquid-glass,
    .glass-card,
    .navbar,
    .footer,
    .journey-rail,
    .map-chip,
    .visual-card,
    .memory-card-front,
    .memory-card-back,
    .province-3d-front,
    .province-3d-back {
        background: var(--bg-secondary);
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .liquid-glass::after,
    .liquid-glass::before,
    .card-shine {
        display: none;
    }

    .cursor-glow, .visit-glow, .visual-orb {
        display: none;
    }
}

@media (prefers-contrast: more) {
    .liquid-glass,
    .glass-card,
    .journey-rail {
        background: var(--bg-secondary);
        border: 1px solid rgba(0, 0, 0, 0.3);
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .nav-link,
    .stat-label,
    .video-meta,
    .style-bar-label {
        color: var(--text-primary);
    }
}