/* ========== 全局变量 ========== */
:root {
    /* 主色调 - 紫粉渐变体系 */
    --color-bg: #0a0418;
    --color-bg-soft: #14082b;
    --color-bg-card: rgba(28, 14, 56, 0.55);
    --color-bg-card-hover: rgba(40, 20, 78, 0.75);

    --color-primary: #a855f7;        /* 紫罗兰 */
    --color-primary-deep: #7c3aed;   /* 深紫 */
    --color-secondary: #ec4899;      /* 玫红 */
    --color-accent: #06b6d4;         /* 青色 */
    --color-gold: #fbbf24;           /* 金色（版本号） */

    --color-text: #f3eefc;
    --color-text-soft: #b8a8d9;
    --color-text-muted: #7a6a9a;

    --color-border: rgba(168, 85, 247, 0.18);
    --color-border-hover: rgba(168, 85, 247, 0.45);

    --gradient-primary: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
    --gradient-primary-soft: linear-gradient(135deg, rgba(168, 85, 247, 0.15) 0%, rgba(236, 72, 153, 0.15) 100%);
    --gradient-text: linear-gradient(135deg, #c084fc 0%, #f472b6 50%, #f9a8d4 100%);
    --gradient-bg: radial-gradient(ellipse at top, #1a0b35 0%, #0a0418 60%);

    --shadow-glow: 0 0 60px rgba(168, 85, 247, 0.35);
    --shadow-card: 0 8px 32px rgba(10, 4, 24, 0.6);
    --shadow-button: 0 8px 30px rgba(168, 85, 247, 0.4);

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 999px;

    --max-width: 1200px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
        "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* ========== 通用容器 ========== */
.section {
    position: relative;
    padding: 110px 24px;
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    font-size: 12px;
    letter-spacing: 3px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--gradient-primary-soft);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 16px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 16px;
    color: var(--color-text-soft);
}

/* ========== 顶部导航 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 18px 0;
    transition: var(--transition);
    background: rgba(10, 4, 24, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(10, 4, 24, 0.92);
    border-bottom-color: var(--color-border);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 20px;
}

.logo-img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    background: var(--gradient-primary);
    /* 占位: logo地址留空 */
}

.logo-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 18px;
    font-size: 15px;
    color: var(--color-text-soft);
    border-radius: var(--radius-full);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--color-text);
    background: rgba(168, 85, 247, 0.1);
}

.nav-cta {
    background: var(--gradient-primary);
    color: #fff !important;
    font-weight: 600;
    box-shadow: 0 4px 18px rgba(168, 85, 247, 0.4);
}

.nav-cta:hover {
    background: var(--gradient-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(168, 85, 247, 0.55);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ========== Hero 首屏 ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 24px 80px;
    overflow: hidden;
    background: var(--gradient-bg);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 14s ease-in-out infinite;
}

.orb-1 {
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, #a855f7, transparent 70%);
    top: -120px;
    left: -120px;
}

.orb-2 {
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, #ec4899, transparent 70%);
    bottom: -100px;
    right: -80px;
    animation-delay: -4s;
}

.orb-3 {
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, #06b6d4, transparent 70%);
    top: 40%;
    left: 40%;
    animation-delay: -8s;
    opacity: 0.3;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(40px, -30px) scale(1.05); }
    66% { transform: translate(-30px, 40px) scale(0.95); }
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(168, 85, 247, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(168, 85, 247, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    max-width: 560px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    font-size: 13px;
    color: var(--color-text-soft);
    background: rgba(168, 85, 247, 0.12);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-secondary);
    box-shadow: 0 0 12px var(--color-secondary);
    animation: pulse 2s ease-in-out infinite;
}

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

.hero-title {
    font-size: clamp(38px, 6vw, 68px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: 2px;
    margin-bottom: 24px;
}

.hero-title-gradient {
    display: block;
    margin-top: 12px;
    font-size: clamp(22px, 3vw, 32px);
    font-weight: 600;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 16px;
    color: var(--color-text-soft);
    margin-bottom: 32px;
    line-height: 1.85;
}

.hero-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    padding: 18px 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 36px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.meta-label {
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.meta-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
}

.meta-divider {
    width: 1px;
    height: 32px;
    background: var(--color-border);
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: var(--shadow-button);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 36px rgba(168, 85, 247, 0.6);
}

.btn-ghost {
    color: var(--color-text);
    background: transparent;
    border: 1px solid var(--color-border-hover);
}

.btn-ghost:hover {
    background: rgba(168, 85, 247, 0.1);
    border-color: var(--color-primary);
}

/* ========== 三张截图叠加展示 ========== */
.hero-showcase {
    position: relative;
    height: 540px;
    perspective: 1500px;
}

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

.screenshot {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 280px;
    height: 480px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 30px 80px rgba(10, 4, 24, 0.7),
                0 0 0 1px rgba(168, 85, 247, 0.3);
    background: #1a0b35;
}

.screenshot-inner {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, #1f0d3d 0%, #2a1450 100%);
}

.shot-header {
    display: flex;
    gap: 6px;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
}

.shot-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
}

.shot-dot:nth-child(1) { background: #ff5f57; }
.shot-dot:nth-child(2) { background: #febc2e; }
.shot-dot:nth-child(3) { background: #28c840; }

.shot-body {
    flex: 1;
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow: hidden;
}

/* 默认位置：三张叠加 */
.screenshot-1 {
    transform: translate(-50%, -50%) translateZ(0) rotate(-6deg) scale(1);
    z-index: 3;
}

.screenshot-2 {
    transform: translate(-50%, -50%) translateZ(-60px) translateX(-30px) translateY(20px) rotate(-12deg) scale(0.92);
    z-index: 2;
    opacity: 0.85;
}

.screenshot-3 {
    transform: translate(-50%, -50%) translateZ(-120px) translateX(-60px) translateY(40px) rotate(-18deg) scale(0.85);
    z-index: 1;
    opacity: 0.65;
}

/* 激活态：当前展示的居中放大 */
.showcase-stack.active-0 .screenshot-1 {
    transform: translate(-50%, -50%) translateZ(60px) rotate(0deg) scale(1.05);
    box-shadow: 0 40px 100px rgba(168, 85, 247, 0.4),
                0 0 0 1px rgba(168, 85, 247, 0.6);
}
.showcase-stack.active-0 .screenshot-2 {
    transform: translate(-50%, -50%) translateZ(-40px) translateX(-220px) rotate(-12deg) scale(0.8);
    opacity: 0.5;
}
.showcase-stack.active-0 .screenshot-3 {
    transform: translate(-50%, -50%) translateZ(-80px) translateX(220px) rotate(12deg) scale(0.8);
    opacity: 0.5;
}

.showcase-stack.active-1 .screenshot-1 {
    transform: translate(-50%, -50%) translateZ(-40px) translateX(-220px) rotate(-12deg) scale(0.8);
    opacity: 0.5;
}
.showcase-stack.active-1 .screenshot-2 {
    transform: translate(-50%, -50%) translateZ(60px) rotate(0deg) scale(1.05);
    box-shadow: 0 40px 100px rgba(168, 85, 247, 0.4),
                0 0 0 1px rgba(168, 85, 247, 0.6);
    opacity: 1;
}
.showcase-stack.active-1 .screenshot-3 {
    transform: translate(-50%, -50%) translateZ(-80px) translateX(220px) rotate(12deg) scale(0.8);
    opacity: 0.5;
}

.showcase-stack.active-2 .screenshot-1 {
    transform: translate(-50%, -50%) translateZ(-40px) translateX(-220px) rotate(-12deg) scale(0.8);
    opacity: 0.5;
}
.showcase-stack.active-2 .screenshot-2 {
    transform: translate(-50%, -50%) translateZ(-80px) translateX(220px) rotate(12deg) scale(0.8);
    opacity: 0.5;
}
.showcase-stack.active-2 .screenshot-3 {
    transform: translate(-50%, -50%) translateZ(60px) rotate(0deg) scale(1.05);
    box-shadow: 0 40px 100px rgba(168, 85, 247, 0.4),
                0 0 0 1px rgba(168, 85, 247, 0.6);
    opacity: 1;
}

/* 截图内容样式 */
.shot-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.shot-tag {
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    color: var(--color-secondary);
    background: rgba(236, 72, 153, 0.15);
    border-radius: var(--radius-full);
    align-self: flex-start;
}

.shot-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    margin-bottom: 8px;
}

.avatar-3 {
    background: linear-gradient(135deg, #f472b6, #a855f7);
    box-shadow: 0 0 20px rgba(236, 72, 153, 0.5);
}

.shot-bubble {
    padding: 10px 14px;
    font-size: 13px;
    color: var(--color-text);
    background: rgba(168, 85, 247, 0.18);
    border-radius: 14px 14px 14px 4px;
    max-width: 90%;
    align-self: flex-start;
}

.shot-bubble.me {
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 14px 14px 4px 14px;
    align-self: flex-end;
}

.char-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 12px;
}

.char-card {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 8px;
    font-size: 12px;
    color: #fff;
    font-weight: 600;
}

.char-1 { background: linear-gradient(135deg, #6366f1, #a855f7); }
.char-2 { background: linear-gradient(135deg, #ec4899, #f472b6); }
.char-3 { background: linear-gradient(135deg, #06b6d4, #3b82f6); }
.char-4 { background: linear-gradient(135deg, #f59e0b, #ef4444); }

.voice-wave {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 60px;
    margin: 20px 0;
}

.voice-wave span {
    width: 4px;
    height: 20px;
    background: var(--gradient-primary);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
}

.voice-wave span:nth-child(2) { animation-delay: 0.1s; }
.voice-wave span:nth-child(3) { animation-delay: 0.2s; }
.voice-wave span:nth-child(4) { animation-delay: 0.3s; }
.voice-wave span:nth-child(5) { animation-delay: 0.4s; }
.voice-wave span:nth-child(6) { animation-delay: 0.5s; }
.voice-wave span:nth-child(7) { animation-delay: 0.4s; }
.voice-wave span:nth-child(8) { animation-delay: 0.3s; }
.voice-wave span:nth-child(9) { animation-delay: 0.2s; }
.voice-wave span:nth-child(10) { animation-delay: 0.1s; }

@keyframes wave {
    0%, 100% { height: 12px; }
    50% { height: 48px; }
}

.shot-line {
    text-align: center;
    font-size: 13px;
    color: var(--color-text-soft);
}

.shot-emojis {
    text-align: center;
    font-size: 24px;
    margin-top: auto;
}

.showcase-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(168, 85, 247, 0.3);
    transition: var(--transition);
}

.dot.active {
    width: 32px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
}

.scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 26px;
    height: 42px;
    border: 2px solid var(--color-border-hover);
    border-radius: 14px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
    z-index: 1;
}

.scroll-hint span {
    width: 4px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: scrollDown 1.8s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(14px); }
}

/* ========== 功能特点 ========== */
.features {
    background: var(--color-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-card);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary-soft);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    color: var(--color-primary);
    transition: var(--transition);
}

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

.feature-card:hover .feature-icon {
    background: var(--gradient-primary);
    color: #fff;
    transform: scale(1.08) rotate(-4deg);
    box-shadow: var(--shadow-glow);
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--color-text);
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-soft);
    line-height: 1.7;
}

/* ========== 用户评价 ========== */
.reviews {
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-soft) 100%);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.review-card {
    padding: 32px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.review-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}

.review-stars {
    color: var(--color-gold);
    font-size: 18px;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.review-text {
    font-size: 15px;
    color: var(--color-text);
    line-height: 1.85;
    margin-bottom: 24px;
    font-style: italic;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 14px;
}

.avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    color: #fff;
}

.avatar-a { background: linear-gradient(135deg, #a855f7, #ec4899); }
.avatar-b { background: linear-gradient(135deg, #06b6d4, #a855f7); }
.avatar-c { background: linear-gradient(135deg, #f59e0b, #ec4899); }
.avatar-d { background: linear-gradient(135deg, #10b981, #06b6d4); }

.author-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
}

.author-meta {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.reviews-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 40px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.stat-value span {
    font-size: 18px;
    font-weight: 600;
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-soft);
    margin-top: 8px;
}

/* ========== 常见问题 ========== */
.faq {
    background: var(--color-bg);
}

.faq-list {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.faq-item.active {
    border-color: var(--color-border-hover);
    background: var(--color-bg-card-hover);
}

.faq-question {
    width: 100%;
    padding: 22px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-icon {
    position: relative;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    background: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.faq-icon::before {
    width: 16px;
    height: 2px;
    transform: translate(-50%, -50%);
}

.faq-icon::after {
    width: 2px;
    height: 16px;
    transform: translate(-50%, -50%);
}

.faq-item.active .faq-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
    opacity: 0;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer p {
    padding: 0 28px 24px;
    font-size: 15px;
    color: var(--color-text-soft);
    line-height: 1.85;
}

/* ========== 下载区域 ========== */
.download {
    position: relative;
    background: linear-gradient(180deg, var(--color-bg) 0%, #1a0b35 100%);
    overflow: hidden;
}

.download-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.download-bg .orb {
    opacity: 0.4;
}

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

.download-content {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
    padding: 60px 40px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-hover);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 30px 80px rgba(10, 4, 24, 0.7);
}

.download-logo {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

.download-logo-img {
    width: 88px;
    height: 88px;
    border-radius: var(--radius-lg);
    object-fit: cover;
    background: var(--gradient-primary);
    box-shadow: var(--shadow-glow);
}

.download-title {
    font-size: clamp(28px, 4vw, 38px);
    font-weight: 700;
    margin: 16px 0;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.download-desc {
    font-size: 16px;
    color: var(--color-text-soft);
    margin-bottom: 28px;
}

.download-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 32px;
    padding: 24px;
    background: rgba(10, 4, 24, 0.5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 32px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    text-align: center;
}

.info-label {
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.info-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
}

.info-value:first-letter {
    color: var(--color-gold);
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 48px;
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: var(--transition);
    box-shadow: 0 12px 40px rgba(168, 85, 247, 0.5);
    position: relative;
    overflow: hidden;
}

.btn-download::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #ec4899, #a855f7);
    opacity: 0;
    transition: var(--transition);
}

.btn-download span,
.btn-download svg {
    position: relative;
    z-index: 1;
}

.btn-download:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: 0 18px 50px rgba(236, 72, 153, 0.6);
}

.btn-download:hover::before {
    opacity: 1;
}

.download-tip {
    margin-top: 16px;
    font-size: 13px;
    color: var(--color-text-muted);
}

/* ========== 页脚 ========== */
.footer {
    padding: 50px 24px 30px;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.footer-container {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 12px;
}

.footer-logo-img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    background: var(--gradient-primary);
}

.footer-brand-text {
    font-size: 20px;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-desc {
    font-size: 14px;
    color: var(--color-text-soft);
    margin-bottom: 24px;
}

.footer-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 24px;
}

.footer-nav a {
    font-size: 14px;
    color: var(--color-text-soft);
    transition: var(--transition);
}

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

.footer-copy {
    font-size: 12px;
    color: var(--color-text-muted);
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}

/* ========== 滚动渐入动画 ========== */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
        margin: 0 auto;
    }

    .hero-actions,
    .hero-meta {
        justify-content: center;
    }

    .hero-showcase {
        height: 480px;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        padding: 16px 24px 24px;
        background: rgba(10, 4, 24, 0.96);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition);
        pointer-events: none;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-link {
        width: 100%;
        padding: 14px 18px;
        text-align: center;
    }

    .nav-toggle {
        display: flex;
    }
}

@media (max-width: 640px) {
    .section {
        padding: 80px 18px;
    }

    .hero {
        padding: 110px 18px 60px;
    }

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

    .reviews-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px 16px;
        padding: 28px 20px;
    }

    .stat-value {
        font-size: 30px;
    }

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

    .hero-meta .meta-divider {
        display: none;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-showcase {
        height: 420px;
    }

    .screenshot {
        width: 220px;
        height: 380px;
    }

    /* 移动端叠加效果简化 */
    .screenshot-1 {
        transform: translate(-50%, -50%) rotate(-4deg) scale(1);
    }
    .screenshot-2 {
        transform: translate(-50%, -50%) translateX(-30px) translateY(20px) rotate(-10deg) scale(0.9);
    }
    .screenshot-3 {
        transform: translate(-50%, -50%) translateX(-60px) translateY(40px) rotate(-16deg) scale(0.82);
    }

    .showcase-stack.active-0 .screenshot-1,
    .showcase-stack.active-1 .screenshot-2,
    .showcase-stack.active-2 .screenshot-3 {
        transform: translate(-50%, -50%) scale(1.05);
    }

    .showcase-stack.active-0 .screenshot-2,
    .showcase-stack.active-1 .screenshot-1,
    .showcase-stack.active-1 .screenshot-3,
    .showcase-stack.active-2 .screenshot-2 {
        transform: translate(-50%, -50%) translateX(-180px) scale(0.7);
        opacity: 0.4;
    }

    .showcase-stack.active-0 .screenshot-3,
    .showcase-stack.active-2 .screenshot-1 {
        transform: translate(-50%, -50%) translateX(180px) scale(0.7);
        opacity: 0.4;
    }

    .download-content {
        padding: 40px 24px;
    }

    .download-info {
        gap: 16px;
    }

    .btn-download {
        width: 100%;
        justify-content: center;
        padding: 16px 32px;
    }

    .footer-nav {
        gap: 16px;
    }
}

@media (max-width: 380px) {
    .hero-title {
        font-size: 36px;
    }

    .screenshot {
        width: 200px;
        height: 340px;
    }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}