/**
 * 算立方 MAXCUBE — 新主页样式
 * 独立于功能页，不继承 platform_base.css 的布局结构，
 * 但复用其 CSS 变量系统。
 */

/* ==================== CSS 变量引入 ==================== */
:root {
    --primary-color: #1890ff;
    --primary-hover: #40a9ff;
    --primary-active: #096dd9;
    --primary-light: #e6f7ff;
    --text-primary: #262626;
    --text-secondary: #595959;
    --text-tertiary: #8c8c8c;
    --border-color: #d9d9d9;
    --border-light: #e8e8e8;
    --bg-base: #f5f7fa;
    --bg-white: #ffffff;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
        'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue',
        Helvetica, Arial, sans-serif;
    --navbar-height: 64px;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03), 0 1px 6px -1px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 3px 6px -4px rgba(0, 0, 0, 0.12), 0 6px 16px 0 rgba(0, 0, 0, 0.08);
}

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

html {
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

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

/* ==================== 导航栏 ==================== */
.home-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    z-index: 1000;
    transition: background var(--transition-slow), box-shadow var(--transition-slow);
}

/* 初始透明 */
.home-navbar.transparent {
    background: transparent;
    box-shadow: none;
}

/* 滚动后变白 */
.home-navbar.solid {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

/* 透明状态下的文字颜色 */
.home-navbar.transparent .nav-menu-item,
.home-navbar.transparent .nav-auth-link {
    color: var(--text-secondary);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.nav-brand-logo {
    width: 38px;
    height: 38px;
    border-radius: 6px;
    overflow: hidden;
}

.nav-brand-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.nav-brand-title {
    display: flex;
    flex-direction: column;
}

.nav-brand-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
}

.nav-brand-sub {
    font-size: 11px;
    color: var(--text-tertiary);
    line-height: 1.2;
}

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

.nav-menu-item {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 6px;
    transition: all var(--transition-base);
    font-weight: 500;
}

.nav-menu-item:hover {
    color: var(--primary-color);
    background: var(--primary-light);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* 语言切换 */
.nav-language-selector {
    position: relative;
}

.nav-lang-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg-white);
    transition: all var(--transition-base);
}

.nav-lang-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.nav-lang-btn.is-open {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.nav-lang-btn svg {
    width: 16px;
    height: 16px;
}

.nav-lang-chevron {
    width: 12px !important;
    height: 12px !important;
    transition: transform var(--transition-base);
}

.nav-lang-btn.is-open .nav-lang-chevron {
    transform: rotate(180deg);
}

.nav-language-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 156px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 6px;
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 6px;
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.14);
    z-index: 1200;
}

.nav-language-menu[hidden] {
    display: none;
}

.nav-language-option {
    width: 100%;
    min-height: 36px;
    display: flex;
    align-items: center;
    padding: 8px 10px;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: var(--text-primary);
    font-size: 13px;
    line-height: 1.35;
    text-align: left;
    cursor: pointer;
    transition: background-color var(--transition-base), color var(--transition-base);
}

.nav-language-option:hover,
.nav-language-option:focus-visible {
    outline: none;
    background: #f1f5f9;
    color: var(--text-primary);
}

.nav-language-option.is-active,
.nav-language-option.is-active:hover,
.nav-language-option.is-active:focus-visible {
    background: #f1f5f9;
    color: var(--primary-color);
    font-weight: 600;
}

.nav-auth-link {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 6px;
    transition: all var(--transition-base);
    font-weight: 500;
}

.nav-auth-link:hover {
    color: var(--primary-color);
}

.nav-signup-btn {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: var(--primary-color);
    padding: 8px 20px;
    border-radius: 6px;
    transition: all var(--transition-base);
}

.nav-signup-btn:hover {
    background: var(--primary-hover);
}

/* 登录态头像菜单 */
.home-user-menu {
    position: relative;
}

.home-user-avatar {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), #36cfc9);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.home-user-avatar:hover,
.home-user-avatar:focus-visible {
    outline: none;
    transform: scale(1.05);
    box-shadow: 0 0 0 3px rgba(24, 144, 255, 0.14);
}

.home-user-panel {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 260px;
    padding: 10px 0;
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    box-shadow: 0 18px 42px rgba(15, 23, 42, 0.16);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(0.98);
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
    z-index: 1200;
}

.home-user-panel[hidden] {
    display: none;
}

.home-user-panel.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.home-user-panel::before {
    content: '';
    position: absolute;
    top: -6px;
    right: 13px;
    width: 12px;
    height: 12px;
    background: var(--bg-white);
    border-top: 1px solid var(--border-light);
    border-left: 1px solid var(--border-light);
    transform: rotate(45deg);
}

.home-user-identity {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px 12px;
}

.home-dropdown-avatar {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), #36cfc9);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
}

.home-user-copy {
    min-width: 0;
    flex: 1;
}

.home-dropdown-username {
    overflow: hidden;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.3;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.home-dropdown-company {
    overflow: hidden;
    margin-top: 1px;
    color: var(--text-tertiary);
    font-size: 12px;
    line-height: 1.3;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.home-dropdown-company[hidden],
.home-dropdown-badge[hidden] {
    display: none;
}

.home-dropdown-badge {
    display: inline-flex;
    align-items: center;
    margin-top: 6px;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 500;
    line-height: 1.4;
}

.home-dropdown-badge.badge-free {
    background: #f5f5f5;
    color: var(--text-tertiary);
}

.home-dropdown-badge.badge-trial,
.home-dropdown-badge.badge-active {
    background: #e6f7ff;
    color: var(--primary-color);
}

.home-dropdown-badge.badge-enterprise {
    background: #2f3542;
    color: #fff;
}

.home-dropdown-badge.badge-expired {
    background: #fff1f0;
    color: #ff4d4f;
}

.home-user-divider {
    height: 1px;
    margin: 0 12px;
    background: var(--border-light);
}

.home-user-menu-list {
    padding: 6px 8px;
}

.home-user-menu-item {
    width: 100%;
    min-height: 38px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.35;
    text-align: left;
    transition: background-color var(--transition-base), color var(--transition-base);
}

.home-user-menu-item:hover,
.home-user-menu-item:focus-visible {
    outline: none;
    background: var(--primary-light);
    color: var(--primary-color);
}

.home-user-menu-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    stroke: currentColor;
}

.home-user-logout:hover,
.home-user-logout:focus-visible {
    background: #fff1f0;
    color: #ff4d4f;
}

.home-user-logout:disabled {
    cursor: default;
    opacity: 0.6;
}

/* ==================== Hero ==================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 40px;
    padding-top: var(--navbar-height);
    background: linear-gradient(135deg, #f8faff 0%, var(--bg-base) 50%, #eef4ff 100%);
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1.15fr;
    gap: 60px;
    align-items: center;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--primary-light);
    border: 1px solid rgba(24, 144, 255, 0.2);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-color);
    width: fit-content;
}

.hero-badge .badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-color);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.5);
    }
}

.hero-title {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.hero-title .highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}

.hero-btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--primary-color);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    transition: all var(--transition-base);
    box-shadow: 0 4px 14px rgba(24, 144, 255, 0.35);
}

.hero-btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(24, 144, 255, 0.4);
    color: #fff;
}

.hero-btn-primary svg {
    width: 18px;
    height: 18px;
}

.hero-btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: var(--bg-white);
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 500;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.hero-btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}

/* Hero 右侧视频区域 */
.hero-visual {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(0, 0, 0, 0.04);
    background: #0f172a;
}

.hero-visual video {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 16px;
}

.hero-visual .video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(15, 23, 42, 0.3) 100%);
    pointer-events: none;
    border-radius: 16px;
}

/* ==================== 产品特点 ==================== */
.features-section {
    padding: 100px 40px;
    background: #0b1120;
    color: white;
}

.features-container {
    max-width: 1280px;
    margin: 0 auto;
}

.features-header {
    text-align: center;
    margin-bottom: 60px;
}

.features-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.features-header p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    max-width: 600px;
    margin: 0 auto;
}

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

.feature-card {
    padding: 36px 30px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    transition: all var(--transition-slow);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(24, 144, 255, 0.3);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-icon.engine {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.feature-icon.ai {
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
}

.feature-icon.constraint {
    background: linear-gradient(135deg, #10b981, #059669);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

/* ==================== 步骤流程 ==================== */
.steps-section {
    padding: 100px 40px;
    background: var(--bg-base);
}

.steps-container {
    max-width: 1280px;
    margin: 0 auto;
}

.steps-header {
    text-align: center;
    margin-bottom: 64px;
}

.steps-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

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

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    position: relative;
}

/* 步骤连接线 */
.steps-grid::before {
    content: '';
    position: absolute;
    top: 42px;
    left: calc(33.33% / 2 + 42px);
    right: calc(33.33% / 2 + 42px);
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-hover), var(--primary-color));
    opacity: 0.3;
}

.step-card {
    text-align: center;
    position: relative;
}

.step-number {
    width: 84px;
    height: 84px;
    border-radius: 50%;
    background: var(--bg-white);
    border: 3px solid var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    box-shadow: 0 4px 16px rgba(24, 144, 255, 0.1);
    position: relative;
    z-index: 1;
}

.step-number span {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary-color);
}

.step-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.step-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 280px;
    margin: 0 auto;
}

/* ==================== 底部 CTA ==================== */
.cta-section {
    padding: 80px 40px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #0050b3 100%);
    text-align: center;
    color: #fff;
}

.cta-container {
    max-width: 720px;
    margin: 0 auto;
}

.cta-section h2 {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 16px;
    opacity: 0.85;
    margin-bottom: 32px;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 40px;
    background: #fff;
    color: var(--primary-color);
    font-size: 17px;
    font-weight: 700;
    border-radius: 8px;
    transition: all var(--transition-base);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    color: var(--primary-active);
}

.cta-btn svg {
    width: 20px;
    height: 20px;
}

/* ==================== 页脚 ==================== */
.home-footer {
    background: #0b1120;
    padding: 48px 40px 32px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-brand-logo {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    overflow: hidden;
}

.footer-brand-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.footer-brand-name {
    font-size: 16px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
}

.footer-copyright {
    font-size: 13px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-base);
}

.footer-links a:hover {
    color: rgba(255, 255, 255, 0.8);
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-section {
        min-height: auto;
        padding: 120px 24px 60px;
    }

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

    .features-grid,
    .steps-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .steps-grid::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .home-navbar {
        padding: 0 20px;
    }

    .nav-center {
        display: none;
    }

    .home-user-panel {
        right: -4px;
        width: min(260px, calc(100vw - 32px));
    }

    .hero-section {
        padding: 100px 20px 40px;
    }

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

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

    .features-section,
    .steps-section {
        padding: 60px 20px;
    }

    .features-header h2,
    .steps-header h2 {
        font-size: 24px;
    }

    .cta-section {
        padding: 60px 20px;
    }

    .cta-section h2 {
        font-size: 24px;
    }

    .footer-container {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}