/* ============================================================
   寻影 XunYing - Official Website Stylesheet
   Design System: The Cinematic AI Curator
   ============================================================ */

/* ==================== CSS 变量 / Design Tokens ==================== */
:root {
    /* Colors - Primary */
    --primary: #ada3ff;
    --primary-dim: #7058ff;
    --primary-container: #3a2d8c;
    --on-primary: #ffffff;
    
    /* Colors - Secondary */
    --secondary: #00f1fe;
    --secondary-dim: #00b8c4;
    
    /* Colors - Background & Surface */
    --background: #0e0e10;
    --surface: #141418;
    --surface-container-lowest: rgba(255,255,255,0.03);
    --surface-container-low: #1a1a20;
    --surface-container: #1f1f26;
    --surface-container-high: #26262e;
    --surface-container-highest: #2e2e38;
    --surface-bright: #35353f;
    
    /* Colors - Text */
    --on-surface: #e8e6f0;
    --on-surface-variant: #a8a6b4;
    --on-surface-dim: #706e7d;
    
    /* Colors - Outline */
    --outline: rgba(168,166,180,0.2);
    --outline-variant: rgba(168,166,180,0.1);
    
    /* Typography */
    --font-display: 'Manrope', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;
    
    /* Sizes */
    --display-lg: 3.5rem;
    --display-md: 2.75rem;
    --headline-lg: 2rem;
    --headline-md: 1.5rem;
    --title-lg: 1.25rem;
    --title-md: 1.1rem;
    --title-sm: 0.95rem;
    --body-lg: 1rem;
    --body-md: 0.875rem;
    --body-sm: 0.8125rem;
    --label-lg: 0.875rem;
    --label-md: 0.75rem;
    --label-sm: 0.6875rem;
    
    /* Spacing */
    --sp-1: 0.25rem;
    --sp-2: 0.5rem;
    --sp-3: 0.75rem;
    --sp-4: 1rem;
    --sp-6: 1.5rem;
    --sp-8: 2rem;
    --sp-10: 2.5rem;
    --sp-12: 3rem;
    --sp-16: 4rem;
    --sp-20: 5rem;
    --sp-24: 6rem;
    --sp-32: 8rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 200ms;
    --duration-normal: 350ms;
    --duration-slow: 600ms;
}

/* ==================== Reset & Base ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scrollbar-width: none; /* Firefox */
}

html::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Edge */
}

body {
    font-family: var(--font-body);
    font-size: var(--body-md);
    color: var(--on-surface);
    background-color: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

img, video {
    max-width: 100%;
    display: block;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    color: inherit;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--sp-6);
}

/* ==================== 通用组件 ==================== */

/* Glass Card */
.glass-card {
    background: var(--surface-container-lowest);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
}

/* Gradient Text */
.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Section Common */
.section {
    padding: var(--sp-24) 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 768px;
    margin: 0 auto var(--sp-16);
}

.section-tag {
    display: inline-block;
    font-family: var(--font-body);
    font-size: var(--label-md);
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--sp-4);
    padding: var(--sp-1) var(--sp-4);
    background: rgba(173,163,255,0.08);
    border-radius: var(--radius-full);
}

.section-title {
    font-family: var(--font-display);
    font-size: var(--display-md);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: var(--sp-4);
    color: var(--on-surface);
}

.section-title.align-left {
    text-align: left;
}

.section-desc {
    font-size: var(--body-lg);
    color: var(--on-surface-variant);
    line-height: 1.7;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    font-family: var(--font-body);
    font-weight: 600;
    border-radius: var(--radius-xl);
    transition: all var(--duration-normal) var(--ease-out);
    cursor: pointer;
    white-space: nowrap;
}

.btn-sm {
    font-size: var(--label-lg);
    padding: var(--sp-2) var(--sp-6);
}

.btn-lg {
    font-size: var(--title-sm);
    padding: var(--sp-3) var(--sp-8);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dim) 100%);
    color: var(--on-primary);
    box-shadow: 0 4px 24px rgba(112,88,255,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(112,88,255,0.45);
}

.btn-ghost {
    color: var(--on-surface-variant);
    background: transparent;
}

.btn-ghost:hover {
    color: var(--on-surface);
    background: var(--surface-bright);
}

.btn-ghost svg {
    color: var(--primary);
}

/* Media Placeholder */
.media-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--sp-3);
    height: 100%;
    min-height: 200px;
    color: var(--on-surface-dim);
    background: var(--surface-container-low);
    border-radius: var(--radius-md);
    font-size: var(--body-sm);
    text-align: center;
    padding: var(--sp-4);
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--sp-4) 0;
    transition: all var(--duration-normal) var(--ease-out);
}

.navbar.scrolled {
    padding: var(--sp-2) 0;
    background: rgba(14,14,16,0.85);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-bottom: 1px solid var(--outline-variant);
}

.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--sp-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    z-index: 10;
}

.logo-img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.logo-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--title-lg);
    display: flex;
    align-items: baseline;
    gap: 0;
}

.logo-cyan {
    color: var(--secondary);
    margin-right: 2px;
}

.logo-white {
    color: var(--on-surface);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--sp-1);
    list-style: none;
}

.nav-links a {
    display: block;
    padding: var(--sp-2) var(--sp-4);
    font-size: var(--body-md);
    font-weight: 500;
    color: var(--on-surface-variant);
    border-radius: var(--radius-md);
    transition: all var(--duration-fast) var(--ease-out);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--on-surface);
    background: rgba(255,255,255,0.05);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    z-index: 10;
}

.lang-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    font-size: var(--label-md);
    font-weight: 600;
    color: var(--on-surface-variant);
    transition: all var(--duration-fast) var(--ease-out);
}

.lang-toggle:hover {
    background: rgba(255,255,255,0.06);
    color: var(--on-surface);
}

.lang-label {
    pointer-events: none;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 24px;
    padding: 2px 0;
}

.menu-toggle span {
    display: block;
    height: 2px;
    background: var(--on-surface);
    border-radius: 2px;
    transition: all var(--duration-fast) var(--ease-out);
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==================== Hero ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    overflow: hidden;
    padding: var(--sp-24) var(--sp-6) var(--sp-16);
    padding-left: max(var(--sp-10), calc((100vw - 1440px) / 2));
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: url('../images/hero-bg.png') center center / cover no-repeat;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to right, rgba(14,14,16,0.92) 0%, rgba(14,14,16,0.6) 50%, rgba(14,14,16,0.3) 100%),
        radial-gradient(ellipse 60% 50% at 50% 0%, rgba(112,88,255,0.12) 0%, transparent 60%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 8s infinite;
}

@keyframes particleFloat {
    0% { opacity: 0; transform: translateY(100vh) scale(0); }
    10% { opacity: 0.6; }
    90% { opacity: 0.1; }
    100% { opacity: 0; transform: translateY(-10vh) scale(1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: left;
    max-width: 1152px;
    width: 100%;
}

.hero-badge {
    display: inline-block;
    font-size: var(--body-md);
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.2em;
    margin-bottom: var(--sp-8);
    padding: var(--sp-2) var(--sp-8);
    background: rgba(173,163,255,0.08);
    border: 1px solid rgba(173,163,255,0.15);
    border-radius: var(--radius-full);
    animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(173,163,255,0.1); }
    50% { box-shadow: 0 0 20px 4px rgba(173,163,255,0.1); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--sp-8);
}

.hero-desc {
    font-size: var(--title-lg);
    color: var(--on-surface-variant);
    line-height: 1.7;
    max-width: 100%;
    white-space: nowrap;
    margin: 0 0 var(--sp-10);
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: var(--sp-4);
    margin-bottom: var(--sp-16);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
    max-width: 864px;
    margin: 0;
    padding: var(--sp-4) var(--sp-8);
    background: rgba(14,14,16,0.6);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
}

.stat-item {
    text-align: center;
    min-width: 0;
}

.stat-num-row {
    display: block;
    line-height: 1.2;
    margin-bottom: 0;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--on-surface);
    display: inline;
    line-height: 1.2;
}

.stat-number-text {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--on-surface);
    display: inline;
    line-height: 1.2;
    white-space: nowrap;
}

.stat-suffix {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 800;
    color: #ffffff;
}

.stat-suffix-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 0.7rem;
    color: var(--on-surface-dim);
    margin-top: var(--sp-1);
    white-space: nowrap;
}

/* Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: var(--sp-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sp-2);
    font-size: var(--label-sm);
    color: var(--on-surface-dim);
    z-index: 1;
}

.scroll-indicator {
    width: 20px;
    height: 32px;
    border: 1.5px solid var(--outline);
    border-radius: 10px;
    position: relative;
}

.scroll-indicator::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 6px;
    background: var(--primary);
    border-radius: 2px;
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
    50% { transform: translateX(-50%) translateY(10px); opacity: 0.3; }
}

/* ==================== 适用人群 - Apple 风格 ==================== */
.audience {
    background: var(--background);
    position: relative;
    overflow: hidden;
}

/* 赛博风粒子流动线条装饰（与产品区共用） */
.audience::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(125deg, transparent 40%, rgba(112,88,255,0.03) 45%, transparent 50%),
        linear-gradient(235deg, transparent 40%, rgba(0,241,254,0.02) 45%, transparent 50%);
    background-size: 200% 200%;
    animation: cyberFlow 12s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

.audience::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 120px,
            rgba(112,88,255,0.015) 120px,
            rgba(112,88,255,0.015) 121px
        ),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 120px,
            rgba(0,241,254,0.012) 120px,
            rgba(0,241,254,0.012) 121px
        );
    mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
    animation: gridPulse 8s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

.audience > .container {
    position: relative;
    z-index: 1;
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-6);
    perspective: 1200px;
}

/* 卡片 */
.audience-card {
    --audience-accent: rgba(173,163,255,0.95);
    --audience-accent-soft: rgba(173,163,255,0.22);
    position: relative;
    padding: var(--sp-8);
    border-radius: 28px;
    overflow: hidden;
    transition: all 0.5s var(--ease-out);
    cursor: default;
    background:
        radial-gradient(circle at top right, var(--audience-accent-soft), transparent 40%),
        linear-gradient(165deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.02) 45%, rgba(10,12,20,0.78) 100%);
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.06),
        0 24px 60px rgba(0,0,0,0.18);
}

.audience-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.08), transparent 45%);
    opacity: 0.8;
    pointer-events: none;
}

.audience-card::after {
    content: '';
    position: absolute;
    inset: 1px;
    border-radius: 27px;
    border: 1px solid rgba(255,255,255,0.04);
    pointer-events: none;
}

.audience-card:hover {
    transform: translateY(-10px);
    border-color: color-mix(in srgb, var(--audience-accent) 48%, transparent);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.08),
        0 24px 70px color-mix(in srgb, var(--audience-accent) 14%, rgba(0,0,0,0.25));
}

.audience-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
    margin-bottom: var(--sp-8);
    position: relative;
    z-index: 1;
}

/* 悬浮光晕 */
.audience-glow {
    position: absolute;
    inset: auto auto -80px -40px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle, color-mix(in srgb, var(--audience-accent) 28%, transparent) 0%, transparent 72%);
    opacity: 0.6;
    transition: transform 0.5s var(--ease-out), opacity 0.5s var(--ease-out);
    pointer-events: none;
    filter: blur(2px);
}

.audience-card:hover .audience-glow {
    opacity: 1;
    transform: scale(1.12);
}

/* 图标 */
.audience-icon-wrap {
    margin-bottom: 0;
}

.audience-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 20px;
    background:
        linear-gradient(145deg, rgba(255,255,255,0.16), rgba(255,255,255,0.04)),
        color-mix(in srgb, var(--audience-accent) 10%, rgba(255,255,255,0.02));
    border: 1px solid color-mix(in srgb, var(--audience-accent) 28%, rgba(255,255,255,0.06));
    color: var(--audience-accent);
    box-shadow: 0 10px 24px color-mix(in srgb, var(--audience-accent) 12%, transparent);
    backdrop-filter: blur(12px);
    transition: all 0.4s var(--ease-out);
    position: relative;
    z-index: 1;
}

.audience-icon svg {
    width: 28px;
    height: 28px;
}

.audience-card:hover .audience-icon {
    transform: translateY(-2px) scale(1.06);
    box-shadow: 0 16px 32px color-mix(in srgb, var(--audience-accent) 18%, transparent);
}

.audience-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-full);
    font-size: var(--label-md);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--on-surface);
    background: color-mix(in srgb, var(--audience-accent) 12%, rgba(255,255,255,0.04));
    border: 1px solid color-mix(in srgb, var(--audience-accent) 25%, rgba(255,255,255,0.05));
    position: relative;
    z-index: 1;
}

/* 文字 */
.audience-role {
    font-family: var(--font-display);
    font-size: 1.7rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--sp-4);
    color: var(--on-surface);
    transition: color 0.3s var(--ease-out);
    position: relative;
    z-index: 1;
}

.audience-card:hover .audience-role {
    color: color-mix(in srgb, var(--audience-accent) 70%, white);
}

.audience-desc-text {
    font-size: 0.96rem;
    color: rgba(232,230,240,0.72);
    line-height: 1.85;
    letter-spacing: 0.01em;
    position: relative;
    z-index: 1;
}

.audience-card-cyan { --audience-accent: #64f6ff; --audience-accent-soft: rgba(100,246,255,0.2); }
.audience-card-purple { --audience-accent: #a992ff; --audience-accent-soft: rgba(169,146,255,0.22); }
.audience-card-orange { --audience-accent: #ffb566; --audience-accent-soft: rgba(255,181,102,0.22); }
.audience-card-pink { --audience-accent: #ff7edb; --audience-accent-soft: rgba(255,126,219,0.2); }
.audience-card-blue { --audience-accent: #73a7ff; --audience-accent-soft: rgba(115,167,255,0.2); }
.audience-card-gold { --audience-accent: #ffd76b; --audience-accent-soft: rgba(255,215,107,0.22); }

/* 交错动画延迟 */
.audience-card:nth-child(1) { transition-delay: 0ms; }
.audience-card:nth-child(2) { transition-delay: 60ms; }
.audience-card:nth-child(3) { transition-delay: 120ms; }
.audience-card:nth-child(4) { transition-delay: 180ms; }
.audience-card:nth-child(5) { transition-delay: 240ms; }
.audience-card:nth-child(6) { transition-delay: 300ms; }

/* ==================== 产品区块 ==================== */
.product {
    background: var(--background);
    position: relative;
    overflow: hidden;
}

/* 赛博风粒子流动线条装饰 */
.product::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(125deg, transparent 40%, rgba(112,88,255,0.03) 45%, transparent 50%),
        linear-gradient(235deg, transparent 40%, rgba(0,241,254,0.02) 45%, transparent 50%);
    background-size: 200% 200%;
    animation: cyberFlow 12s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

.product::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 120px,
            rgba(112,88,255,0.015) 120px,
            rgba(112,88,255,0.015) 121px
        ),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 120px,
            rgba(0,241,254,0.012) 120px,
            rgba(0,241,254,0.012) 121px
        );
    mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 70%);
    animation: gridPulse 8s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes cyberFlow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes gridPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

.product > .container {
    position: relative;
    z-index: 1;
}

.product-showcase {
    display: flex;
    flex-direction: column;
    gap: var(--sp-10);
    max-width: 1320px;
    margin: 0 auto;
}

.product-main-row {
    display: flex;
    align-items: stretch;
    gap: var(--sp-8);
}

.product-visual {
    position: relative;
    flex: 1;
    min-width: 0;
}

.product-screen {
    overflow: hidden;
    padding: 0;
    border-radius: var(--radius-lg);
}

.screen-header {
    display: flex;
    gap: 6px;
    padding: var(--sp-3) var(--sp-4);
    background: rgba(255,255,255,0.03);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.screen-body {
    padding: 0;
    overflow: hidden;
    aspect-ratio: 16 / 9;
}

/* Screenshot Carousel */
.screenshot-carousel {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.carousel-track {
    display: flex;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
    min-width: 100%;
    width: 100%;
    height: 100%;
    object-fit: fill;
    display: block;
    background: #0a0a0c;
}

.carousel-dots {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    z-index: 2;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    border: none;
    cursor: pointer;
    padding: 0;
    transition: all 0.3s ease;
}

.carousel-dot.active {
    background: var(--primary);
    transform: scale(1.3);
}

.product-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, rgba(112,88,255,0.12) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
}

/* 功能卡片 一排5个 */
.product-features-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--sp-4);
}

.feature-card {
    padding: var(--sp-6) var(--sp-4);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sp-3);
    transition: all var(--duration-normal) var(--ease-out);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(173,163,255,0.2);
    box-shadow: 0 20px 60px rgba(112,88,255,0.08);
}

.feature-card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(173,163,255,0.12), rgba(0,241,254,0.06));
    color: var(--primary);
    margin-bottom: var(--sp-1);
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: var(--title-sm);
    font-weight: 700;
}

.feature-card p {
    font-size: var(--label-md);
    color: var(--on-surface-variant);
    line-height: 1.5;
}

/* 右侧下载区 */
.download-sidebar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    gap: var(--sp-4);
    flex-shrink: 0;
    width: 260px;
}

.download-btn-side {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: var(--sp-4) var(--sp-6) !important;
    font-size: var(--body-md) !important;
    white-space: nowrap;
    width: 100%;
    text-align: center;
    border-radius: var(--radius-lg);
}

.download-btn-mac-side {
    border: 1px solid rgba(173,163,255,0.28);
    background: linear-gradient(135deg, rgba(173,163,255,0.12), rgba(0,241,254,0.08));
    color: var(--on-surface);
    opacity: 1;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}

.download-btn-mac-side:hover {
    opacity: 1;
    border-color: rgba(0,241,254,0.35);
    box-shadow: 0 8px 24px rgba(0,241,254,0.12);
}

.download-meta-side {
    display: flex;
    justify-content: center;
    gap: var(--sp-4);
    font-size: var(--body-sm);
    color: var(--on-surface-dim);
    white-space: nowrap;
    padding-top: var(--sp-2);
}

.separator {
    color: var(--on-surface-dim);
    opacity: 0.4;
}

.download-modal {
    position: fixed;
    inset: 0;
    z-index: 2300;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-normal) var(--ease-out),
                visibility var(--duration-normal) var(--ease-out);
}

.download-modal.active {
    opacity: 1;
    visibility: visible;
}

.download-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(4, 5, 8, 0.84);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.download-modal-dialog {
    position: relative;
    z-index: 1;
    width: min(920px, 100%);
    max-height: calc(100vh - 48px);
    padding: 32px;
    border-radius: 28px;
    overflow: hidden;
    background:
        radial-gradient(circle at top right, rgba(112,88,255,0.18), transparent 26%),
        radial-gradient(circle at left bottom, rgba(0,241,254,0.12), transparent 24%),
        linear-gradient(180deg, rgba(24,25,34,0.98), rgba(14,15,22,0.96));
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow:
        0 32px 120px rgba(0,0,0,0.5),
        inset 0 1px 0 rgba(255,255,255,0.06);
    transform: translateY(20px) scale(0.98);
    transition: transform var(--duration-normal) var(--ease-out);
}

.download-modal.active .download-modal-dialog {
    transform: translateY(0) scale(1);
}

.download-modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    z-index: 3;
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: rgba(255,255,255,0.88);
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
    transition: all var(--duration-fast) var(--ease-out);
}

.download-modal-close:hover {
    background: rgba(173,163,255,0.16);
    color: #ffffff;
    transform: rotate(90deg);
}

.download-modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    padding-right: 56px;
    margin-bottom: 28px;
}

.download-modal-header-text {
    flex: 1;
    min-width: 0;
}

.download-modal-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #7cf2ff;
    background: rgba(0,241,254,0.1);
    border: 1px solid rgba(0,241,254,0.18);
    margin-bottom: 16px;
}

.download-modal-title {
    font-family: var(--font-display);
    font-size: clamp(1.7rem, 2.4vw, 2.5rem);
    line-height: 1.18;
    letter-spacing: -0.025em;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 12px;
}

.download-modal-desc {
    font-size: 0.98rem;
    line-height: 1.8;
    color: rgba(236,236,244,0.76);
}

.download-modal-action {
    flex-shrink: 0;
    min-width: 220px;
    justify-content: center;
    padding: 14px 24px;
    border-radius: 18px;
}

.download-modal-content {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    gap: 20px;
    align-items: start;
}

.download-steps-block,
.download-tips-block {
    padding: 24px;
    border-radius: 24px;
    background:
        linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02)),
        rgba(13,14,20,0.72);
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.download-steps-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
}

.download-steps-list,
.download-tips-list {
    margin: 0;
    padding-left: 20px;
    color: rgba(236,236,244,0.82);
}

.download-steps-list {
    display: grid;
    gap: 12px;
}

.download-tips-list {
    display: grid;
    gap: 10px;
}

.download-steps-list li,
.download-tips-list li {
    line-height: 1.8;
}

.download-steps-list strong,
.download-tips-list strong {
    color: #ffffff;
}

/* ==================== 作品集 ==================== */
.portfolio {
    background: url('../images/portfolio-bg.png') center center / cover no-repeat;
    position: relative;
}

.portfolio::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(14, 14, 16, 0.75);
    z-index: 0;
}

/* 上方缽化过渡（产品区→作品集） */
.portfolio::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, var(--background), transparent);
    pointer-events: none;
    z-index: 1;
}

.portfolio > .container {
    position: relative;
    z-index: 2;
}

.portfolio-tabs-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-6);
    margin-bottom: var(--sp-10);
}

.portfolio-tabs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
}

.orientation-toggle {
    display: flex;
    align-items: center;
    gap: var(--sp-1);
    padding: var(--sp-1);
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--outline-variant);
}

.orientation-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 32px;
    border-radius: var(--radius-full);
    border: none;
    background: transparent;
    color: var(--on-surface-variant);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.orientation-btn:hover {
    color: var(--on-surface);
    background: rgba(255,255,255,0.08);
}

.orientation-btn.active {
    color: var(--on-primary);
    background: linear-gradient(135deg, var(--primary), var(--primary-dim));
}

.portfolio-tab {
    font-size: var(--body-md);
    font-weight: 600;
    padding: var(--sp-2) var(--sp-8);
    border-radius: var(--radius-full);
    color: var(--on-surface-variant);
    transition: all var(--duration-fast) var(--ease-out);
    cursor: pointer;
    border: 1px solid transparent;
}

.portfolio-tab:hover {
    color: var(--on-surface);
    background: rgba(255,255,255,0.05);
}

.portfolio-tab.active {
    color: var(--on-primary);
    background: linear-gradient(135deg, var(--primary), var(--primary-dim));
}

.portfolio-panel {
    display: none;
}

.portfolio-panel.active {
    display: block;
}

/* 视频区域 */
.video-showcase {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-6);
}

.video-card {
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-out);
}

.video-card:hover {
    transform: translateY(-4px);
    border-color: rgba(173,163,255,0.2);
    box-shadow: 0 20px 60px rgba(112,88,255,0.08);
}

.video-media {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--surface-container-low);
}

.video-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
}

.video-media .media-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    color: var(--on-surface-dim);
    font-size: var(--body-sm);
    width: 100%;
    height: 100%;
    position: absolute;
    inset: 0;
}

.video-info {
    padding: var(--sp-4);
}

.video-info h3 {
    font-family: var(--font-display);
    font-size: var(--title-sm);
    font-weight: 700;
    margin-bottom: var(--sp-1);
}

.video-info p {
    font-size: var(--body-sm);
    color: var(--on-surface-dim);
}

.video-duration {
    position: absolute;
    bottom: var(--sp-2);
    right: var(--sp-2);
    font-size: var(--label-md);
    color: #fff;
    font-weight: 600;
    padding: var(--sp-1) var(--sp-3);
    background: rgba(0,0,0,0.6);
    border-radius: var(--radius-sm);
    z-index: 2;
}

/* 图片区域 */
.image-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-6);
}

/* 竖屏展示区域 - 一排4个 */
.vertical-showcase {
    grid-template-columns: repeat(4, 1fr) !important;
}

.vertical-media {
    aspect-ratio: 9 / 16 !important;
}

.storyboard-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: var(--radius-lg);
}

.image-card {
    overflow: hidden;
    transition: all var(--duration-normal) var(--ease-out);
}

.image-card:hover {
    transform: translateY(-4px);
    border-color: rgba(173,163,255,0.2);
    box-shadow: 0 20px 60px rgba(112,88,255,0.08);
}

.image-media {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    background: var(--surface-container-low);
}

.image-media .media-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    color: var(--on-surface-dim);
    font-size: var(--body-sm);
    width: 100%;
    height: 100%;
    position: absolute;
    inset: 0;
}

.image-info {
    padding: var(--sp-4);
}

.image-info h3 {
    font-family: var(--font-display);
    font-size: var(--title-sm);
    font-weight: 700;
    margin-bottom: var(--sp-1);
}

.image-info p {
    font-size: var(--body-sm);
    color: var(--on-surface-dim);
}

.play-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(14,14,16,0.3);
    opacity: 0;
    transition: opacity var(--duration-fast) var(--ease-out);
    cursor: pointer;
}

.video-card:hover .play-overlay,
.image-card:hover .play-overlay {
    opacity: 1;
}

.play-btn-circle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(173,163,255,0.9);
    color: white;
    backdrop-filter: blur(10px);
    transition: transform var(--duration-fast) var(--ease-out);
}

.play-btn-circle:hover {
    transform: scale(1.1);
}

/* ==================== 新闻公告 ==================== */
.news {
    background: var(--surface);
    position: relative;
}

.news::before {
    content: '';
    position: absolute;
    top: -80px;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to bottom, transparent, var(--surface));
    pointer-events: none;
    z-index: 2;
}

.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-6);
}

.news-card {
    padding: var(--sp-8);
    display: flex;
    flex-direction: column;
    transition: all var(--duration-normal) var(--ease-out);
}

.news-card:hover {
    transform: translateY(-4px);
    border-color: rgba(173,163,255,0.2);
}

.news-card.featured {
    background: linear-gradient(135deg, rgba(112,88,255,0.08) 0%, rgba(0,241,254,0.03) 100%);
}

.news-tag {
    display: inline-block;
    width: fit-content;
    font-size: var(--label-sm);
    font-weight: 600;
    padding: var(--sp-1) var(--sp-3);
    border-radius: var(--radius-full);
    background: rgba(173,163,255,0.12);
    color: var(--primary);
    margin-bottom: var(--sp-3);
}

.news-tag.announcement {
    background: rgba(0,241,254,0.1);
    color: var(--secondary);
}

.news-tag.tech {
    background: rgba(40,200,64,0.1);
    color: #28c840;
}

.news-date {
    font-size: var(--label-md);
    color: var(--on-surface-dim);
    margin-bottom: var(--sp-3);
}

.news-title {
    font-family: var(--font-display);
    font-size: var(--title-lg);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--sp-3);
}

.news-excerpt {
    font-size: var(--body-md);
    color: var(--on-surface-variant);
    line-height: 1.7;
    flex-grow: 1;
    margin-bottom: var(--sp-4);
}

.news-link {
    font-size: var(--body-md);
    font-weight: 600;
    color: var(--primary);
    transition: color var(--duration-fast) var(--ease-out);
}

.news-link:hover {
    color: var(--secondary);
}

.news-modal {
    position: fixed;
    inset: 0;
    z-index: 2200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out);
}

.news-modal.active {
    opacity: 1;
    visibility: visible;
}

.news-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(4, 5, 8, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.news-modal-dialog {
    position: relative;
    z-index: 1;
    width: min(920px, 100%);
    max-height: calc(100vh - 40px);
    padding: 32px 32px 28px;
    border-radius: 28px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(circle at top right, rgba(112,88,255,0.18), transparent 28%),
        radial-gradient(circle at left bottom, rgba(0,241,254,0.1), transparent 24%),
        linear-gradient(180deg, rgba(24,25,34,0.98), rgba(14,15,22,0.96));
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow:
        0 32px 120px rgba(0,0,0,0.5),
        inset 0 1px 0 rgba(255,255,255,0.06);
    transform: translateY(20px) scale(0.98);
    transition: transform var(--duration-normal) var(--ease-out);
}

.news-modal.active .news-modal-dialog {
    transform: translateY(0) scale(1);
}

.news-modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    z-index: 3;
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: rgba(255,255,255,0.88);
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
    transition: all var(--duration-fast) var(--ease-out);
}

.news-modal-close:hover {
    background: rgba(173,163,255,0.16);
    color: #ffffff;
    transform: rotate(90deg);
}

.news-modal-header {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 18px;
    padding-right: 56px;
}

.news-modal-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #7cf2ff;
    background: rgba(0,241,254,0.1);
    border: 1px solid rgba(0,241,254,0.18);
}

.news-modal-date {
    font-size: 0.88rem;
    color: rgba(232,230,240,0.52);
}

.news-modal-title {
    font-family: var(--font-display);
    font-size: clamp(1.7rem, 2.4vw, 2.5rem);
    line-height: 1.18;
    letter-spacing: -0.025em;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 22px;
}

.news-modal-body {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding-right: 10px;
    color: rgba(236,236,244,0.82);
    font-size: 1rem;
    line-height: 1.9;
    scrollbar-width: thin;
    scrollbar-color: rgba(173,163,255,0.6) rgba(255,255,255,0.05);
}

.news-modal-body p {
    margin-bottom: 18px;
}

.news-modal-body p:last-child {
    margin-bottom: 0;
}

.news-modal-body::-webkit-scrollbar {
    width: 8px;
}

.news-modal-body::-webkit-scrollbar-track {
    background: rgba(255,255,255,0.05);
    border-radius: 999px;
}

.news-modal-body::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(173,163,255,0.9), rgba(85,241,255,0.76));
    border-radius: 999px;
}

.news-modal-body::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, rgba(173,163,255,1), rgba(85,241,255,0.92));
}

/* ==================== 教程展示 ==================== */
.tutorials {
    background:
        radial-gradient(circle at 12% 16%, rgba(112,88,255,0.18), transparent 28%),
        radial-gradient(circle at 88% 76%, rgba(0,241,254,0.14), transparent 24%),
        linear-gradient(180deg, #121218 0%, #0c0d12 52%, #0a0b10 100%);
    position: relative;
    overflow: hidden;
}

.tutorials::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(120deg, rgba(255,255,255,0.035), transparent 26%, transparent 72%, rgba(255,255,255,0.025)),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 110px,
            rgba(173,163,255,0.018) 110px,
            rgba(173,163,255,0.018) 111px
        );
    mask-image: radial-gradient(circle at center, black 42%, transparent 100%);
    -webkit-mask-image: radial-gradient(circle at center, black 42%, transparent 100%);
    pointer-events: none;
}

.tutorials::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 54%;
    transform: translate(-50%, -50%);
    width: min(1200px, 92vw);
    height: 560px;
    background: radial-gradient(circle, rgba(112,88,255,0.1) 0%, rgba(0,241,254,0.05) 35%, transparent 72%);
    filter: blur(36px);
    pointer-events: none;
}

.tutorials-layout {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.74fr) minmax(360px, 0.72fr);
    gap: 24px;
    align-items: stretch;
}

.tutorial-player,
.tutorial-list {
    position: relative;
    padding: 24px;
    border-radius: 28px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.08);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.055), rgba(255,255,255,0.018)),
        rgba(13,14,20,0.72);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.05),
        0 24px 80px rgba(0,0,0,0.28);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
}

.tutorial-player::before,
.tutorial-list::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(145deg, rgba(255,255,255,0.06), transparent 32%, transparent 70%, rgba(255,255,255,0.03));
    pointer-events: none;
}

.tutorial-player::after,
.tutorial-list::after {
    content: '';
    position: absolute;
    inset: 1px;
    border-radius: 27px;
    border: 1px solid rgba(255,255,255,0.03);
    pointer-events: none;
}

.tutorial-player {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: var(--sp-5);
}

.tutorial-player-head,
.tutorial-list-head {
    position: relative;
    z-index: 1;
    margin-bottom: var(--sp-3);
}

.tutorial-player-head {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.tutorial-list-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: nowrap;
}

.tutorial-player-label,
.tutorial-list-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.95rem;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: #f3f2ff;
    background: linear-gradient(135deg, rgba(112,88,255,0.4), rgba(0,241,254,0.18));
    border: 1px solid rgba(173,163,255,0.18);
    box-shadow: 0 8px 28px rgba(112,88,255,0.14);
    margin-bottom: 0;
}

.tutorial-player-title {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 1.6vw, 1.55rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
    color: rgba(232,230,240,0.88);
    text-shadow: 0 6px 22px rgba(0,0,0,0.18);
}

.tutorial-video-wrap {
    position: relative;
    z-index: 1;
    border-radius: 24px;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    min-height: 0;
    background:
        linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0)),
        #020305;
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow:
        0 28px 80px rgba(0,0,0,0.34),
        0 0 0 1px rgba(255,255,255,0.03);
}

.tutorial-video-wrap::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to bottom, rgba(255,255,255,0.08), transparent 28%),
        radial-gradient(circle at top right, rgba(112,88,255,0.16), transparent 28%);
    pointer-events: none;
    z-index: 1;
}

.tutorial-video-wrap video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #000;
}

.tutorial-list {
    display: flex;
    flex-direction: column;
    align-self: stretch;
    min-height: 100%;
    background:
        radial-gradient(circle at top right, rgba(0,241,254,0.08), transparent 26%),
        linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02)),
        rgba(13,14,20,0.75);
}

.tutorial-pagination {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: flex-start;
    justify-content: flex-end;
    gap: 6px;
    padding: 4px;
    margin-left: auto;
    margin-top: -2px;
    border-radius: 999px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
}

.tutorial-page-btn {
    min-width: 64px;
    height: 32px;
    padding: 0 12px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    color: rgba(245,245,252,0.92);
    background: linear-gradient(135deg, rgba(173,163,255,0.16), rgba(255,255,255,0.03));
    border: 1px solid rgba(255,255,255,0.07);
    transition: all var(--duration-fast) var(--ease-out);
}

.tutorial-page-btn:hover {
    transform: translateY(-1px);
    border-color: rgba(173,163,255,0.24);
    background: linear-gradient(135deg, rgba(173,163,255,0.22), rgba(0,241,254,0.08));
}

.tutorial-page-btn.is-disabled,
.tutorial-page-btn:disabled {
    opacity: 0.42;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.tutorial-page-indicator {
    min-width: 44px;
    text-align: center;
    font-size: 0.72rem;
    font-weight: 700;
    color: rgba(232,230,240,0.72);
}

.tutorial-episodes-page {
    position: relative;
    z-index: 1;
    display: none;
    flex: 1;
    min-height: 0;
}

.tutorial-episodes-page.active {
    display: flex;
}

.tutorial-episodes {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    min-height: 0;
    justify-content: flex-start;
}

.tutorial-episode {
    position: relative;
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    text-align: left;
    padding: 14px 16px;
    margin-top: 3px;
    border-radius: 18px;
    background:
        linear-gradient(135deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02)),
        rgba(255,255,255,0.01);
    border: 1px solid rgba(255,255,255,0.06);
    transition: all var(--duration-normal) var(--ease-out);
    overflow: hidden;
}

.tutorial-episode::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(112,88,255,0.1), transparent 42%, transparent 100%);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-out);
}

.tutorial-episode:hover {
    transform: translateY(-2px) translateX(1px);
    border-color: rgba(173,163,255,0.2);
    background:
        linear-gradient(135deg, rgba(173,163,255,0.08), rgba(255,255,255,0.03)),
        rgba(255,255,255,0.02);
    box-shadow: 0 18px 34px rgba(0,0,0,0.18);
}

.tutorial-episode:hover::before {
    opacity: 1;
}

.tutorial-episode.active {
    border-color: rgba(95,234,255,0.2);
    background:
        linear-gradient(135deg, rgba(112,88,255,0.2), rgba(0,241,254,0.1) 70%),
        rgba(255,255,255,0.03);
    box-shadow:
        0 24px 50px rgba(8,14,24,0.32),
        0 0 0 1px rgba(173,163,255,0.06);
}

.tutorial-episode.active::before {
    opacity: 1;
    background: linear-gradient(90deg, rgba(112,88,255,0.18), rgba(0,241,254,0.08) 55%, transparent 100%);
}

.tutorial-episode-index {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
    min-width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    font-family: var(--font-display);
    font-size: 0.92rem;
    font-weight: 800;
    color: rgba(255,255,255,0.92);
    background:
        linear-gradient(145deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02)),
        rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.tutorial-episode.active .tutorial-episode-index {
    background: linear-gradient(135deg, #a49bff 0%, #55f1ff 100%);
    color: #081018;
    border-color: transparent;
    box-shadow: 0 12px 26px rgba(85,241,255,0.2);
}

.tutorial-episode-text {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.16rem;
    min-width: 0;
    min-height: 54px;
}

.tutorial-episode-text strong {
    font-size: 0.9rem;
    font-weight: 750;
    color: #f6f6fb;
    font-style: normal;
    letter-spacing: -0.01em;
}

.tutorial-episode-text em {
    font-size: 0.72rem;
    color: rgba(232,230,240,0.5);
    line-height: 1.35;
    font-style: normal;
}


/* ==================== 关于我们 ==================== */
.slogan {
    background: var(--background);
}

.slogan-content {
    text-align: center;
    max-width: 960px;
    margin: 0 auto;
    padding: var(--sp-16) 0;
}

.slogan-content .section-tag {
    margin-bottom: var(--sp-6);
    color: var(--tertiary);
}

.slogan-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    color: var(--on-surface);
    line-height: 1.2;
    margin-bottom: var(--sp-8);
}

.slogan-subtitle {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    color: var(--on-surface-variant);
    line-height: 1.6;
    margin-bottom: var(--sp-6);
}

.slogan-desc {
    font-size: clamp(1rem, 2vw, 1.35rem);
    color: var(--on-surface-variant);
    opacity: 0.7;
    line-height: 1.6;
}

/* ==================== 联系我们 ==================== */
.contact {
    background: var(--background);
    position: relative;
}

/* 上方缽化过渡（slogan→contact） */
.contact::before {
    content: '';
    position: absolute;
    top: -80px;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to bottom, transparent, var(--background));
    pointer-events: none;
    z-index: 2;
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-6);
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    padding: var(--sp-8);
    text-align: center;
    transition: all var(--duration-normal) var(--ease-out);
}

.contact-card:hover {
    transform: translateY(-4px);
    border-color: rgba(173,163,255,0.2);
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: 0 auto var(--sp-4);
    border-radius: var(--radius-lg);
    background: rgba(173,163,255,0.08);
    color: var(--primary);
}

.contact-card h3 {
    font-family: var(--font-display);
    font-size: var(--title-sm);
    font-weight: 700;
    margin-bottom: var(--sp-2);
}

.contact-card p {
    font-size: var(--body-md);
    color: var(--on-surface-variant);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--sp-3);
    margin-top: var(--sp-2);
    flex-wrap: wrap;
}

.social-qr-item {
    position: relative;
    display: inline-flex;
    justify-content: center;
}

.social-link {
    position: relative;
    z-index: 2;
    font-size: var(--body-sm);
    padding: var(--sp-1) var(--sp-3);
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.05);
    color: var(--on-surface-variant);
    transition: all var(--duration-fast) var(--ease-out);
}

.social-link:hover {
    background: var(--primary-dim);
    color: white;
}

.social-qr-popup {
    position: absolute;
    left: 50%;
    bottom: calc(100% + 14px);
    transform: translateX(-50%) translateY(8px);
    width: 220px;
    padding: 12px;
    border-radius: 20px;
    background: rgba(20, 20, 24, 0.96);
    border: 1px solid rgba(173,163,255,0.22);
    box-shadow: 0 20px 48px rgba(0,0,0,0.35);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out),
                visibility var(--duration-fast) var(--ease-out);
    z-index: 5;
}

.social-qr-popup::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 100%;
    transform: translateX(-50%);
    border-width: 10px 9px 0 9px;
    border-style: solid;
    border-color: rgba(20, 20, 24, 0.96) transparent transparent transparent;
}

.social-qr-image {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: contain;
    border-radius: 12px;
    background: #fff;
}

.social-qr-item:hover .social-qr-popup {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--surface-container-low);
    padding: var(--sp-16) 0 var(--sp-8);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    gap: var(--sp-16);
    padding-bottom: var(--sp-12);
}

.footer-tagline {
    margin-top: var(--sp-3);
    font-size: var(--body-md);
    color: var(--on-surface-dim);
}

.footer-links {
    display: flex;
    gap: var(--sp-12);
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
}

.footer-col h4 {
    font-family: var(--font-display);
    font-size: var(--title-sm);
    font-weight: 700;
    margin-bottom: var(--sp-1);
    color: var(--on-surface);
}

.footer-col-links {
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
}

.footer-col a {
    font-size: var(--body-md);
    color: var(--on-surface-variant);
    transition: color var(--duration-fast) var(--ease-out);
}

.footer-col a:hover {
    color: var(--primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--sp-8);
    border-top: 1px solid var(--outline-variant);
    font-size: var(--body-sm);
    color: var(--on-surface-dim);
}

.footer-legal {
    display: flex;
    gap: var(--sp-6);
}

.footer-legal a {
    color: var(--on-surface-dim);
}

.footer-legal a:hover {
    color: var(--primary);
}

/* ==================== 视频弹窗 ==================== */
.video-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out);
}

.video-modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.85);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 900px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transform: scale(0.9);
    transition: transform var(--duration-normal) var(--ease-out);
}

.video-modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: var(--sp-4);
    right: var(--sp-4);
    z-index: 10;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(0,0,0,0.5);
    color: white;
    transition: background var(--duration-fast) var(--ease-out);
}

.modal-close:hover {
    background: rgba(255,255,255,0.2);
}

.modal-video {
    background: var(--surface);
    aspect-ratio: 16/9;
}

.modal-video .media-placeholder {
    min-height: auto;
    height: 100%;
}

/* ==================== 滚动动画 ==================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s var(--ease-out);
}

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

/* AI Status Pulse */
@keyframes aiPulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    :root {
        --display-lg: 2.75rem;
        --display-md: 2.25rem;
        --headline-lg: 1.75rem;
    }

    .hero-title {
        font-size: 3.5rem;
    }

    .hero-content {
        max-width: 800px;
    }
    
    .product-features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .tutorials-layout {
        grid-template-columns: 1fr;
        gap: var(--sp-5);
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .about-layout {
        max-width: 100%;
    }
    
    .contact-info-grid {
        grid-template-columns: 1fr;
    }
    
    .audience-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --display-lg: 2.25rem;
        --display-md: 1.75rem;
        --headline-lg: 1.5rem;
        --sp-24: 4rem;
        --sp-16: 3rem;
    }
    
    /* Mobile Nav */
    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--sp-4);
        background: rgba(14,14,16,0.97);
        backdrop-filter: blur(30px);
        opacity: 0;
        visibility: hidden;
        transition: all var(--duration-normal) var(--ease-out);
    }
    
    .nav-links.open {
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links a {
        font-size: var(--title-lg);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-actions .btn {
        display: none;
    }
    
    /* Hero */
    .hero-title {
        font-size: 2.75rem;
    }

    .hero-desc {
        max-width: 100%;
        white-space: normal;
    }

    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--sp-6);
    }

    .stat-number, .stat-number-text {
        font-size: 1.5rem;
    }
    
    .product-main-row {
        flex-direction: column;
    }

    .download-sidebar {
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .download-btn-side {
        flex: 1;
        min-width: 200px;
    }

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

    /* Portfolio */
    .video-showcase {
        grid-template-columns: 1fr 1fr;
    }

    .image-showcase {
        grid-template-columns: 1fr 1fr;
    }

    .vertical-showcase {
        grid-template-columns: repeat(4, 1fr) !important;
    }

    .tutorial-player,
    .tutorial-list {
        padding: 18px;
    }

    .tutorial-player-head,
    .tutorial-list-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .tutorial-pagination {
        width: 100%;
        justify-content: space-between;
        margin-left: 0;
        margin-top: 0;
    }

    .news-modal-dialog {
        padding: 24px 20px 20px;
        max-height: calc(100vh - 32px);
    }

    .news-modal-title {
        font-size: 1.4rem;
        margin-bottom: 16px;
    }

    .news-modal-body {
        font-size: 0.94rem;
        line-height: 1.8;
        padding-right: 6px;
    }

    .download-modal {
        padding: 16px;
    }

    .download-modal-dialog {
        padding: 24px 20px 20px;
        max-height: calc(100vh - 32px);
    }

    .download-modal-header {
        flex-direction: column;
        gap: 16px;
        padding-right: 44px;
        margin-bottom: 20px;
    }

    .download-modal-title {
        font-size: 1.4rem;
    }

    .download-modal-desc {
        font-size: 0.92rem;
        line-height: 1.7;
    }

    .download-modal-action {
        width: 100%;
        min-width: 0;
    }

    .download-modal-content {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .download-steps-block,
    .download-tips-block {
        padding: 18px;
        border-radius: 20px;
    }

    .tutorial-episodes {
        justify-content: flex-start;
        gap: 8px;
    }

    .tutorial-episode {
        padding: 10px 12px;
    }

    .tutorial-episode-text strong {
        font-size: 0.84rem;
    }

    .tutorial-episode-text em {
        font-size: 0.68rem;
    }

    .tutorial-player-title {
        font-size: 1.05rem;
    }
    
    .portfolio-tabs-row {
        flex-wrap: wrap;
        gap: var(--sp-3);
    }
    
    /* News */
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    /* Contact */
    .contact-info-grid {
        grid-template-columns: 1fr;
    }

    .social-qr-popup {
        width: 180px;
        bottom: calc(100% + 10px);
    }
    
    /* Audience */
    .audience-grid {
        grid-template-columns: 1fr;
    }
    
    .audience-card {
        padding: var(--sp-8) var(--sp-6) var(--sp-6);
    }
    
    /* Footer */
    .footer-top {
        flex-direction: column;
        gap: var(--sp-10);
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: var(--sp-8);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--sp-4);
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --display-lg: 1.875rem;
        --display-md: 1.5rem;
    }
    
    .video-showcase {
        grid-template-columns: 1fr;
    }

    .product-features-grid {
        grid-template-columns: 1fr;
    }

    .image-showcase {
        grid-template-columns: 1fr;
    }

    .vertical-showcase {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .tutorial-episode {
        flex-direction: column;
    }

    .news-modal {
        padding: 12px;
    }

    .news-modal-close {
        top: 12px;
        right: 12px;
        width: 40px;
        height: 40px;
    }

    .news-modal-header {
        gap: 10px;
        margin-bottom: 14px;
        padding-right: 44px;
    }

    .news-modal-tag {
        font-size: 0.72rem;
        padding: 5px 12px;
    }

    .news-modal-date {
        font-size: 0.8rem;
    }

    .download-modal-close {
        top: 12px;
        right: 12px;
        width: 40px;
        height: 40px;
    }

    .download-modal-badge {
        font-size: 0.72rem;
        padding: 5px 12px;
        margin-bottom: 12px;
    }

    .download-steps-title {
        font-size: 0.98rem;
        margin-bottom: 12px;
    }

    .download-steps-list,
    .download-tips-list {
        padding-left: 18px;
        font-size: 0.9rem;
    }

    .tutorial-episode-index {
        min-width: 42px;
        height: 42px;
    }

    .social-links {
        flex-direction: column;
        align-items: center;
    }

    .social-qr-popup {
        width: 160px;
    }
    
    .hero-badge {
        font-size: var(--label-sm);
    }
}