/* ============================================
   World视界AI全能创作 - 官网样式
   暗色主题（与软件UI风格一致）
   ============================================ */

/* CSS 变量 */
:root {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d29;
    --bg-tertiary: #252836;
    --bg-card: #1e2130;
    --bg-hover: #2a2e42;

    --text-primary: #ffffff;
    --text-secondary: #b0b8cc;
    --text-muted: #6b7280;

    --accent-primary: #3b82f6;
    --accent-secondary: #06b6d4;
    --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #8b5cf6;

    --border-color: #2d3142;
    --border-hover: #3d4258;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --nav-height: 64px;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei UI", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--accent-primary);
}

/* ============ 导航栏 ============ */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    height: var(--nav-height);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: var(--max-width);
    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: 8px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 28px;
}

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

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

.nav-link {
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    white-space: nowrap;
}

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

.nav-btn-primary {
    background: var(--accent-gradient);
    color: white !important;
    font-weight: 600;
}

.nav-btn-primary:hover {
    opacity: 0.9;
    background: var(--accent-gradient);
}

.nav-btn-outline {
    border: 1px solid var(--border-color);
    color: var(--text-secondary) !important;
}

.nav-btn-outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary) !important;
}

/* ============ 主内容 ============ */
.main-content {
    flex: 1;
    width: 100%;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============ 首页 Hero ============ */
.hero {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    padding: 80px 24px 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--accent-secondary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.5;
}

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

/* ============ 按钮 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    white-space: nowrap;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    color: white;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.btn-large {
    padding: 16px 36px;
    font-size: 17px;
}

.btn-disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
}

/* ============ 功能卡片 ============ */
.features {
    padding: 80px 24px;
}

.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-title p {
    font-size: 16px;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

/* ============ 版本对比 ============ */
.pricing {
    padding: 80px 24px;
    background: var(--bg-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    position: relative;
    transition: all 0.3s;
}

.pricing-card.featured {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.pricing-card.featured::before {
    content: "推荐";
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-gradient);
    color: white;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 8px;
}

.pricing-price {
    font-size: 36px;
    font-weight: 800;
    margin: 16px 0;
    color: var(--accent-secondary);
}

.pricing-price small {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 400;
}

.pricing-features {
    text-align: left;
    margin: 24px 0;
    list-style: none;
}

.pricing-features li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pricing-features li::before {
    content: "✓";
    color: var(--accent-success);
    font-weight: bold;
}

.pricing-features li.disabled {
    color: var(--text-muted);
}

.pricing-features li.disabled::before {
    content: "•";
    color: var(--text-muted);
}

/* ============ 下载页 ============ */
.download-page {
    padding: 60px 24px;
    max-width: 800px;
    margin: 0 auto;
}

.download-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
}

.download-icon {
    font-size: 64px;
    margin-bottom: 24px;
}

.download-card h2 {
    font-size: 28px;
    margin-bottom: 8px;
}

.download-card .version {
    color: var(--accent-secondary);
    font-size: 16px;
    margin-bottom: 8px;
}

.download-card .size {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 32px;
}

.download-info {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 24px 0;
    text-align: left;
}

.download-info h4 {
    font-size: 15px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.download-info ul {
    list-style: none;
    color: var(--text-secondary);
    font-size: 13px;
}

.download-info li {
    padding: 4px 0;
    display: flex;
    gap: 8px;
}

.download-info li::before {
    content: "•";
    color: var(--accent-secondary);
}

/* ============ 登录/注册 ============ */
.auth-page {
    padding: 60px 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - var(--nav-height) - 200px);
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
}

.auth-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: 32px;
}

.auth-tab {
    flex: 1;
    padding: 10px;
    text-align: center;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    background: transparent;
}

.auth-tab.active {
    background: var(--accent-gradient);
    color: white;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.auth-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--accent-danger);
    color: var(--accent-danger);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-bottom: 20px;
}

.btn-full {
    width: 100%;
}

/* ============ 用户中心 ============ */
.dashboard-page {
    padding: 40px 24px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.dashboard-header {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.dashboard-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
    font-weight: 700;
}

.dashboard-info h2 {
    font-size: 24px;
    margin-bottom: 4px;
}

.dashboard-info .license-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-top: 8px;
}

.license-badge.basic {
    background: rgba(139, 92, 246, 0.2);
    color: #a78bfa;
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.license-badge.professional {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.license-badge.subscription {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.dashboard-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.dashboard-card h3 {
    font-size: 18px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

.info-row:last-child {
    border-bottom: none;
}

.info-row .label {
    color: var(--text-secondary);
}

.info-row .value {
    color: var(--text-primary);
    font-weight: 500;
}

/* ============ 升级包列表 ============ */
.updates-page {
    padding: 40px 24px;
    max-width: var(--max-width);
    margin: 0 auto;
}

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

.update-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.update-info {
    flex: 1;
}

.update-info h4 {
    font-size: 18px;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.update-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.update-status.available {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
}

.update-status.locked {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

.update-lock-info {
    font-size: 12px;
    color: var(--accent-warning);
    margin-top: 8px;
}

/* ============ 错误页 ============ */
.error-page {
    padding: 80px 24px;
    text-align: center;
}

.error-code {
    font-size: 72px;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.error-message {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* ============ 底部 ============ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 48px 24px 24px;
    margin-top: auto;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

.footer-section h4 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.footer-section p,
.footer-section a {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.8;
    display: block;
}

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

.footer-version {
    color: var(--text-muted) !important;
    font-size: 12px !important;
    margin-top: 8px;
}

.footer-bottom {
    max-width: var(--max-width);
    margin: 32px auto 0;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

/* ============ 响应式 ============ */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .nav-links {
        gap: 4px;
    }

    .nav-link {
        padding: 6px 10px;
        font-size: 13px;
    }

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

    .dashboard-header {
        flex-direction: column;
        text-align: center;
    }

    .update-item {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ============ 工具类 ============ */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--accent-success); }
.text-warning { color: var(--accent-warning); }
.text-danger { color: var(--accent-danger); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }