/* ===========================
   夜色AI - 主样式文件
   配色：深紫靛蓝夜色主题
   =========================== */

/* 全局变量 */
:root {
    --primary: #7c3aed;
    --primary-light: #a78bfa;
    --primary-dark: #5b21b6;
    --secondary: #4f46e5;
    --accent: #ec4899;
    --accent-light: #f472b6;
    --bg-dark: #0a0a1a;
    --bg-darker: #050510;
    --bg-section: #111127;
    --bg-card: #1a1a3a;
    --bg-card-hover: #24244d;
    --text-primary: #ffffff;
    --text-secondary: #c7c7e0;
    --text-muted: #8888aa;
    --border: rgba(139, 92, 246, 0.2);
    --glow-primary: rgba(124, 58, 237, 0.4);
    --glow-accent: rgba(236, 72, 153, 0.3);
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #4f46e5 100%);
    --gradient-accent: linear-gradient(135deg, #ec4899 0%, #7c3aed 100%);
    --gradient-hero: linear-gradient(180deg, #0a0a1a 0%, #1a0a2e 50%, #0a0a1a 100%);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 60px var(--glow-primary);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --nav-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

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

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===========================
   顶部导航栏
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(10, 10, 26, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 10, 26, 0.95);
    border-bottom-color: var(--border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    height: 100%;
    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: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--gradient-primary);
    box-shadow: 0 4px 15px var(--glow-primary);
}

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-menu a {
    font-size: 15px;
    color: var(--text-secondary);
    transition: color 0.2s ease;
    position: relative;
}

.nav-menu a:not(.nav-download-btn)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

.nav-menu a:hover::after {
    width: 100%;
}

.nav-download-btn {
    padding: 10px 22px;
    background: var(--gradient-primary);
    border-radius: 50px;
    color: #fff !important;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px var(--glow-primary);
}

.nav-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px var(--glow-primary);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.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);
}

/* ===========================
   通用区块标题
   =========================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(124, 58, 237, 0.15);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-light);
    letter-spacing: 1px;
    margin-bottom: 18px;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 17px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ===========================
   Hero 首屏区域
   =========================== */
.hero {
    position: relative;
    min-height: 100vh;
    padding-top: var(--nav-height);
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

/* 星空效果 */
.stars, .stars2, .stars3 {
    position: absolute;
    inset: 0;
    background-repeat: repeat;
}

.stars {
    background-image: 
        radial-gradient(1px 1px at 20px 30px, #fff, transparent),
        radial-gradient(1px 1px at 40px 70px, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 50px 160px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 90px 40px, rgba(167,139,250,0.8), transparent),
        radial-gradient(1px 1px at 130px 80px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 160px 120px, rgba(236,72,153,0.6), transparent);
    background-size: 200px 200px;
    animation: twinkle 8s ease-in-out infinite;
}

.stars2 {
    background-image: 
        radial-gradient(1px 1px at 100px 150px, #fff, transparent),
        radial-gradient(1px 1px at 200px 50px, rgba(167,139,250,0.7), transparent),
        radial-gradient(1.5px 1.5px at 300px 200px, #fff, transparent),
        radial-gradient(1px 1px at 350px 100px, rgba(255,255,255,0.9), transparent);
    background-size: 400px 400px;
    animation: twinkle 12s ease-in-out infinite;
    animation-delay: -4s;
}

.stars3 {
    background-image: 
        radial-gradient(2px 2px at 50px 250px, rgba(236,72,153,0.5), transparent),
        radial-gradient(1px 1px at 250px 350px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 450px 150px, rgba(167,139,250,0.6), transparent);
    background-size: 500px 500px;
    animation: twinkle 15s ease-in-out infinite;
    animation-delay: -8s;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 60% at 80% 20%, rgba(124, 58, 237, 0.25), transparent 60%),
        radial-gradient(ellipse 60% 50% at 10% 80%, rgba(236, 72, 153, 0.18), transparent 60%),
        radial-gradient(ellipse 50% 40% at 50% 50%, rgba(79, 70, 229, 0.15), transparent 70%);
}

.hero-container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px 40px;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
    min-height: calc(100vh - var(--nav-height) - 80px);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(124, 58, 237, 0.12);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 14px;
    color: var(--primary-light);
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.6);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.2); }
}

.hero-title {
    margin-bottom: 24px;
}

.title-line1 {
    display: block;
    font-size: 56px;
    font-weight: 900;
    line-height: 1.1;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
}

.title-line2 {
    display: block;
    font-size: 36px;
    font-weight: 700;
    line-height: 1.2;
    margin-top: 8px;
    color: var(--text-primary);
}

.hero-desc {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.8;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

/* 按钮通用样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.3s ease;
    white-space: nowrap;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 6px 24px var(--glow-primary);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px var(--glow-primary);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary);
    transform: translateY(-3px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.stat-num {
    font-size: 26px;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* 截图区域 */
.hero-screenshots {
    position: relative;
    height: 560px;
}

.screenshot-card {
    position: absolute;
    border-radius: var(--radius-lg);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.screenshot-frame {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(10px);
}

.screenshot-glow {
    position: absolute;
    inset: -3px;
    border-radius: calc(var(--radius-lg) + 3px);
    background: var(--gradient-accent);
    z-index: -1;
    opacity: 0;
    filter: blur(20px);
    transition: opacity 0.5s ease;
}

.screenshot-card:hover .screenshot-glow {
    opacity: 0.5;
}

.screenshot-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border);
}

.screenshot-header .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #eab308; }
.dot.green { background: #22c55e; }

.screenshot-title {
    margin-left: auto;
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.screenshot-body {
    height: 280px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* 模拟聊天内容1 - 角色广场 */
.mock-chat-1 {
    background: linear-gradient(180deg, rgba(124, 58, 237, 0.08), transparent);
}

.mock-chat-1::before,
.mock-chat-1::after,
.mock-chat-2::before,
.mock-chat-2::after,
.mock-chat-3::before,
.mock-chat-3::after {
    content: '';
    display: block;
}

.mock-chat-1 .char-card,
.mock-chat-2 .msg-bubble,
.mock-chat-3 .profile-item {
    display: block;
}

.mock-chat-1 > * {
    background: rgba(124, 58, 237, 0.15);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 12px;
    padding: 10px 12px;
    font-size: 0;
    position: relative;
}

.mock-chat-1 > *::before {
    content: '';
    position: absolute;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-primary);
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
}

.mock-chat-1 > *::after {
    content: '';
    position: absolute;
    left: 60px;
    top: 50%;
    transform: translateY(-50%);
    height: 20px;
    background: linear-gradient(90deg, var(--text-muted), transparent);
    border-radius: 4px;
}

.mock-chat-1 > *:nth-child(1) { height: 56px; }
.mock-chat-1 > *:nth-child(1)::after { width: 100px; }
.mock-chat-1 > *:nth-child(2) { height: 56px; background: rgba(236, 72, 153, 0.12); border-color: rgba(236, 72, 153, 0.3); }
.mock-chat-1 > *:nth-child(2)::before { background: var(--gradient-accent); }
.mock-chat-1 > *:nth-child(2)::after { width: 130px; }
.mock-chat-1 > *:nth-child(3) { height: 56px; }
.mock-chat-1 > *:nth-child(3)::after { width: 80px; }
.mock-chat-1 > *:nth-child(4) { height: 56px; background: rgba(79, 70, 229, 0.12); border-color: rgba(79, 70, 229, 0.3); }
.mock-chat-1 > *:nth-child(4)::before { background: linear-gradient(135deg, #4f46e5, #06b6d4); }
.mock-chat-1 > *:nth-child(4)::after { width: 110px; }

/* 模拟聊天内容2 - 私密对话 */
.mock-chat-2 {
    background: linear-gradient(180deg, rgba(236, 72, 153, 0.08), transparent);
    justify-content: flex-end;
}

.mock-chat-2 > * {
    max-width: 75%;
    padding: 10px 14px;
    border-radius: 16px;
    font-size: 0;
    line-height: 0;
}

.mock-chat-2 > *:nth-child(odd) {
    align-self: flex-start;
    background: var(--bg-card-hover);
    border-bottom-left-radius: 4px;
}

.mock-chat-2 > *:nth-child(even) {
    align-self: flex-end;
    background: var(--gradient-primary);
    border-bottom-right-radius: 4px;
}

.mock-chat-2 > *::after {
    content: '';
    display: block;
    height: 10px;
    background: currentColor;
    opacity: 0.4;
    border-radius: 4px;
}

.mock-chat-2 > *:nth-child(1)::after { width: 90px; }
.mock-chat-2 > *:nth-child(2)::after { width: 70px; opacity: 0.7; color: #fff; }
.mock-chat-2 > *:nth-child(3)::after { width: 130px; }
.mock-chat-2 > *:nth-child(4)::after { width: 100px; opacity: 0.7; color: #fff; }
.mock-chat-2 > *:nth-child(5)::after { width: 60px; }

/* 模拟聊天内容3 - 人设档案 */
.mock-chat-3 {
    background: linear-gradient(180deg, rgba(79, 70, 229, 0.08), transparent);
}

.mock-chat-3 > *:nth-child(1) {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--gradient-accent);
    align-self: center;
    margin-bottom: 8px;
    box-shadow: 0 4px 20px var(--glow-accent);
}

.mock-chat-3 > *:nth-child(2) {
    align-self: center;
    font-size: 0;
    height: 14px;
    width: 80px;
    background: var(--text-primary);
    border-radius: 4px;
    opacity: 0.9;
    margin-bottom: 12px;
}

.mock-chat-3 > * {
    display: block;
    width: 100%;
    font-size: 0;
}

.mock-chat-3 > *:nth-child(n+3) {
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid var(--border);
    position: relative;
}

.mock-chat-3 > *:nth-child(n+3)::before {
    content: '';
    display: inline-block;
    vertical-align: middle;
    width: 30%;
    height: 10px;
    background: var(--text-muted);
    opacity: 0.5;
    border-radius: 4px;
    margin-right: 10px;
}

.mock-chat-3 > *:nth-child(n+3)::after {
    content: '';
    display: inline-block;
    vertical-align: middle;
    width: 55%;
    height: 10px;
    background: var(--text-secondary);
    opacity: 0.7;
    border-radius: 4px;
}

/* 截图卡片定位与浮动动画 */
.screenshot-1 {
    width: 240px;
    top: 0;
    left: 10px;
    transform: rotate(-6deg);
    animation: float1 6s ease-in-out infinite;
    z-index: 1;
}

.screenshot-2 {
    width: 260px;
    top: 60px;
    right: 0;
    transform: rotate(5deg);
    animation: float2 7s ease-in-out infinite;
    z-index: 3;
}

.screenshot-3 {
    width: 240px;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) rotate(2deg);
    animation: float3 8s ease-in-out infinite;
    z-index: 2;
}

.screenshot-card:hover {
    z-index: 10 !important;
    transform: rotate(0) scale(1.05) translateZ(0);
}

@keyframes float1 {
    0%, 100% { transform: rotate(-6deg) translateY(0); }
    50% { transform: rotate(-4deg) translateY(-15px); }
}

@keyframes float2 {
    0%, 100% { transform: rotate(5deg) translateY(0); }
    50% { transform: rotate(3deg) translateY(-20px); }
}

@keyframes float3 {
    0%, 100% { transform: translateX(-50%) rotate(2deg) translateY(0); }
    50% { transform: translateX(-50%) rotate(0deg) translateY(-12px); }
}

/* Hero 底部版本信息条 */
.hero-version-bar {
    position: relative;
    z-index: 2;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px 30px;
}

.version-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    padding: 18px 32px;
    background: rgba(26, 26, 58, 0.6);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(15px);
    flex-wrap: wrap;
}

.version-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.version-tag strong {
    color: var(--text-primary);
    font-weight: 700;
}

.version-tag svg {
    color: var(--primary-light);
}

.version-divider {
    width: 1px;
    height: 24px;
    background: var(--border);
}

/* ===========================
   功能特色区块
   =========================== */
.features {
    padding: 100px 0;
    background: var(--bg-section);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

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

.feature-card {
    padding: 36px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    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: transform 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    background: var(--bg-card-hover);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow), var(--shadow-card);
}

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

.feature-wide {
    grid-column: span 2;
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: all 0.3s ease;
}

.icon-1 {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.2), rgba(124, 58, 237, 0.05));
    color: var(--primary-light);
    border: 1px solid rgba(124, 58, 237, 0.3);
}

.icon-2 {
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.2), rgba(236, 72, 153, 0.05));
    color: var(--accent-light);
    border: 1px solid rgba(236, 72, 153, 0.3);
}

.icon-3 {
    background: linear-gradient(135deg, rgba(251, 146, 60, 0.2), rgba(251, 146, 60, 0.05));
    color: #fb923c;
    border: 1px solid rgba(251, 146, 60, 0.3);
}

.icon-4 {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.2), rgba(34, 197, 94, 0.05));
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.icon-5 {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(6, 182, 212, 0.05));
    color: #06b6d4;
    border: 1px solid rgba(6, 182, 212, 0.3);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(-4deg);
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===========================
   用户评价区块
   =========================== */
.reviews {
    padding: 100px 0;
    background: var(--bg-dark);
    position: relative;
}

.reviews::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.review-card {
    padding: 32px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

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

.review-stars {
    display: flex;
    gap: 2px;
    margin-bottom: 20px;
    color: #fbbf24;
}

.review-text {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 24px;
    min-height: 100px;
}

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

.review-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    color: #fff;
}

.review-info {
    flex: 1;
}

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

.review-date {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ===========================
   常见问题区块
   =========================== */
.faq {
    padding: 100px 0;
    background: var(--bg-section);
    position: relative;
}

.faq::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

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

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active {
    border-color: var(--primary);
    box-shadow: 0 4px 30px var(--glow-primary);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 28px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    transition: color 0.2s ease;
}

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

.faq-arrow {
    flex-shrink: 0;
    color: var(--text-muted);
    transition: transform 0.3s ease, color 0.3s ease;
}

.faq-item.active .faq-arrow {
    transform: rotate(180deg);
    color: var(--primary-light);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
    padding: 0 28px;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 28px 24px;
}

.faq-answer p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* ===========================
   下载区域
   =========================== */
.download {
    padding: 100px 0;
    background: var(--bg-dark);
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.download-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.download-particles {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 60% 50% at 50% 30%, rgba(124, 58, 237, 0.2), transparent 70%),
        radial-gradient(ellipse 40% 40% at 80% 70%, rgba(236, 72, 153, 0.15), transparent 60%),
        radial-gradient(ellipse 40% 40% at 20% 80%, rgba(79, 70, 229, 0.15), transparent 60%);
    animation: particleMove 12s ease-in-out infinite alternate;
}

@keyframes particleMove {
    0% { transform: scale(1) translateY(0); }
    100% { transform: scale(1.1) translateY(-20px); }
}

.download-card {
    position: relative;
    z-index: 2;
    max-width: 860px;
    margin: 0 auto;
    padding: 56px 48px;
    background: linear-gradient(145deg, var(--bg-card), rgba(26, 26, 58, 0.5));
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-card), 0 0 100px rgba(124, 58, 237, 0.1);
    backdrop-filter: blur(20px);
}

.download-logo {
    margin-bottom: 28px;
}

.download-logo-img {
    width: 88px;
    height: 88px;
    margin: 0 auto;
    border-radius: 22px;
    background: var(--gradient-primary);
    box-shadow: 0 10px 40px var(--glow-primary);
}

.download-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 14px;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.download-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 36px;
}

.download-info-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    padding: 20px 32px;
    margin-bottom: 40px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    flex-wrap: wrap;
}

.download-info-item {
    text-align: center;
}

.info-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.info-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.download-info-divider {
    width: 1px;
    height: 36px;
    background: var(--border);
}

/* 主下载按钮 */
.download-main-btn-wrap {
    margin-bottom: 40px;
}

.btn-download-main {
    display: inline-flex;
    align-items: center;
    gap: 18px;
    padding: 20px 36px 20px 24px;
    background: var(--gradient-accent);
    border-radius: 100px;
    color: #fff;
    font-weight: 700;
    box-shadow: 0 10px 50px var(--glow-primary), 0 4px 20px var(--glow-accent);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    max-width: 100%;
}

.btn-download-main::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn-download-main:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 16px 60px var(--glow-primary), 0 8px 30px var(--glow-accent);
}

.btn-download-main:hover::before {
    transform: translateX(100%);
}

.btn-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    backdrop-filter: blur(10px);
}

.btn-text {
    text-align: left;
    flex: 1;
}

.btn-title {
    font-size: 19px;
    line-height: 1.2;
}

.btn-subtitle {
    font-size: 13px;
    opacity: 0.85;
    margin-top: 3px;
    font-weight: 500;
}

.btn-arrow {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.btn-download-main:hover .btn-arrow {
    transform: translateX(4px);
}

.download-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 50px;
}

.step-num {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

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

.step-arrow {
    color: var(--text-muted);
    font-size: 18px;
}

.download-badges {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.badge-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
}

.badge-item svg {
    color: var(--primary-light);
}

/* ===========================
   页脚
   =========================== */
.footer {
    background: var(--bg-darker);
    padding: 60px 0 24px;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr 2fr;
    gap: 60px;
    margin-bottom: 48px;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 20px;
    margin-bottom: 16px;
}

.footer-logo-img {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--gradient-primary);
}

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

.footer-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 320px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 18px;
}

.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 10px;
    transition: color 0.2s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===========================
   入场动画
   =========================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ===========================
   响应式设计
   =========================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 50px;
        min-height: auto;
        padding: 50px 24px;
    }

    .hero-content {
        text-align: center;
    }

    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }

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

    .hero-stats {
        justify-content: center;
    }

    .hero-screenshots {
        max-width: 520px;
        margin: 0 auto;
        height: 520px;
    }

    .title-line1 {
        font-size: 48px;
    }

    .title-line2 {
        font-size: 30px;
    }

    .section-title {
        font-size: 34px;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(10, 10, 26, 0.98);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
        padding: 16px 24px 24px;
        transform: translateY(-120%);
        transition: transform 0.3s ease;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-menu a {
        padding: 16px 0;
        width: 100%;
        border-bottom: 1px solid var(--border);
        text-align: center;
    }

    .nav-menu a:last-child {
        border-bottom: none;
        margin-top: 16px;
    }

    .nav-download-btn {
        width: 100%;
        padding: 14px 22px !important;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        min-height: auto;
    }

    .title-line1 {
        font-size: 40px;
    }

    .title-line2 {
        font-size: 24px;
    }

    .hero-desc {
        font-size: 15px;
    }

    .btn-large {
        padding: 14px 26px;
        font-size: 15px;
    }

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

    .stat-num {
        font-size: 22px;
    }

    .hero-screenshots {
        height: 480px;
        max-width: 420px;
    }

    .screenshot-1 {
        width: 200px;
        left: 0;
    }
    
    .screenshot-2 {
        width: 220px;
    }
    
    .screenshot-3 {
        width: 200px;
    }

    .screenshot-body {
        height: 240px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .section-title {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 15px;
    }

    .features {
        padding: 70px 0;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .feature-wide {
        grid-column: span 1;
    }

    .feature-card {
        padding: 28px 24px;
    }

    .feature-icon {
        width: 56px;
        height: 56px;
        margin-bottom: 18px;
    }

    .reviews {
        padding: 70px 0;
    }

    .reviews-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .review-text {
        min-height: auto;
    }

    .faq {
        padding: 70px 0;
    }

    .faq-question {
        padding: 18px 20px;
        font-size: 15px;
        gap: 12px;
    }

    .faq-item.active .faq-answer {
        padding: 0 20px 20px;
    }

    .download {
        padding: 70px 0;
    }

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

    .download-logo-img {
        width: 72px;
        height: 72px;
    }

    .download-title {
        font-size: 28px;
    }

    .download-subtitle {
        font-size: 15px;
    }

    .download-info-bar {
        gap: 16px;
        padding: 16px;
    }

    .download-info-divider {
        display: none;
    }

    .info-value {
        font-size: 16px;
    }

    .btn-download-main {
        width: 100%;
        padding: 16px 20px;
        gap: 14px;
    }

    .btn-icon {
        width: 44px;
        height: 44px;
    }

    .btn-title {
        font-size: 16px;
    }

    .btn-subtitle {
        font-size: 12px;
    }

    .btn-arrow {
        display: none;
    }

    .step-arrow {
        display: none;
    }

    .download-steps {
        flex-direction: column;
        align-items: stretch;
    }

    .footer {
        padding: 40px 0 20px;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }

    .version-divider {
        display: none;
    }

    .version-info {
        gap: 16px;
        padding: 16px 20px;
    }
}

@media (max-width: 480px) {
    .nav-container,
    .section-container,
    .hero-container,
    .hero-version-bar {
        padding-left: 16px;
        padding-right: 16px;
    }

    .title-line1 {
        font-size: 34px;
    }

    .title-line2 {
        font-size: 20px;
    }

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

    .btn {
        width: 100%;
    }

    .hero-badge {
        font-size: 12px;
        padding: 6px 14px;
    }

    .hero-screenshots {
        height: 420px;
    }

    .screenshot-1,
    .screenshot-3 {
        width: 180px;
    }

    .screenshot-2 {
        width: 200px;
    }

    .screenshot-body {
        height: 200px;
    }

    .section-title {
        font-size: 24px;
    }

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

    .download-title {
        font-size: 24px;
    }

    .download-info-bar {
        flex-direction: column;
        gap: 12px;
    }
}