/* ============================================
   欢迎页样式 — Welcome Page
   ============================================ */

/* ----- Hero 区域（主题感知渐变全宽） ----- */
.welcome-hero {
    position: relative;
    overflow: hidden;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(160deg, var(--color-bg) 0%, var(--color-bg-secondary) 50%, var(--color-bg) 100%);
}

.welcome-hero::before {
    content: '';
    position: absolute;
    top: -40%;
    left: 20%;
    width: 900px;
    height: 900px;
    background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 50%);
    pointer-events: none;
}

.welcome-hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    right: 0;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(192, 132, 252, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

/* ----- 顶部横条 ----- */
.welcome-header {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--color-border);
}

.welcome-brand {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 8px;
}

.welcome-brand svg {
    color: var(--color-primary);
}

.brand-disclaimer {
    font-size: 0.72rem;
    font-weight: 400;
    color: var(--color-text-muted);
    margin-left: 12px;
    padding-left: 12px;
    border-left: 1px solid var(--color-border);
}

.welcome-header .theme-toggle {
    position: static;
    margin-left: auto;
}

/* ----- 居中标题 ----- */
.welcome-headline {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 40px 24px 0;
}

.welcome-headline h1 {
    font-size: 2.6rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

/* ----- Hero 主体内容 ----- */
.welcome-content {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 32px 24px 80px;
    gap: 48px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* ----- 左侧登录栏 ----- */
.welcome-left {
    flex-shrink: 0;
    width: 340px;
    display: flex;
    flex-direction: column;
}

/* 登录卡片 */
.welcome-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 28px;
    width: 100%;
    box-shadow: var(--shadow-xl);
    height: 500px;
    overflow-y: auto;
}

.welcome-card-title {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-card .auth-footer-links {
    text-align: center;
    margin-top: 14px;
    font-size: 0.82rem;
}

.welcome-card .auth-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--color-border);
}

.welcome-card .auth-tab {
    flex: 1;
    padding: 10px 0;
    border: none;
    background: none;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    position: relative;
    transition: color var(--transition-fast);
}

.welcome-card .auth-tab:hover {
    color: var(--color-text-secondary);
}

.welcome-card .auth-tab.active {
    color: var(--color-primary);
}

.welcome-card .auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
}

.welcome-card .auth-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.welcome-card .auth-form-extra {
    display: flex;
    justify-content: space-between;
    margin-top: -6px;
}

.welcome-card .auth-form-extra a {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.welcome-card .auth-form-extra a:hover {
    color: var(--color-primary);
}

.welcome-card .auth-submit {
    width: 100%;
    margin-top: 4px;
}

.welcome-card .auth-footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.welcome-card .auth-footer-links a:hover {
    color: var(--color-primary);
}

.welcome-card .auth-footer-divider {
    margin: 0 8px;
    color: var(--color-border);
}

/* ----- 右侧功能说明卡片 ----- */
.welcome-right {
    flex: 1;
    min-width: 0;
}

.feature-single {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 28px;
    width: 100%;
    box-shadow: var(--shadow-xl);
    height: 500px;
    overflow-y: auto;
}

.feature-single-header {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    padding-bottom: 16px;
    margin-bottom: 16px;
    border-bottom: 2px solid var(--color-border);
}

.feature-item {
    display: flex;
    gap: 12px;
    padding: 10px 0;
}

.feature-item + .feature-item {
    border-top: 1px solid var(--color-border);
}

.feature-item-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    margin-top: 1px;
}

.feature-item-content {
    flex: 1;
    min-width: 0;
}

.feature-item-content strong {
    font-size: 0.9rem;
    color: var(--color-text);
    font-weight: 600;
}

.feature-item-content p {
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-top: 2px;
}

.feature-item-link {
    display: inline-block;
    margin-top: 4px;
    color: var(--color-primary);
    text-decoration: underline;
    font-size: 0.82rem;
}

/* ----- 底部 ----- */
.welcome-footer {
    position: relative;
    z-index: 2;
}

.welcome-footer .site-footer {
    position: static;
    backdrop-filter: none;
    background: transparent;
    border-top: 1px solid var(--color-border);
}

/* ----- 响应式 ----- */
@media (max-width: 900px) {
    .welcome-content {
        flex-direction: column;
        gap: 32px;
        padding: 32px 20px 60px;
    }

    .welcome-left {
        width: 100%;
        max-width: 400px;
    }

    .welcome-headline h1 {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .welcome-content {
        padding: 20px 16px 40px;
        gap: 24px;
    }

    .welcome-headline {
        padding: 24px 16px 0;
    }

    .welcome-headline h1 {
        font-size: 1.6rem;
    }

    .welcome-header {
        padding: 12px 16px;
    }

    .welcome-brand {
        flex-wrap: wrap;
    }

    .brand-disclaimer {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        width: 100%;
        font-size: 0.68rem;
    }

    .feature-single {
        padding: 20px;
    }

    .feature-item {
        padding: 8px 0;
    }
}