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

:root {
    --color-primary:      #1B4332;
    --color-primary-dark: #143728;
    --color-gold:         #FFB703;
    --color-gold-hover:   #E5A500;
    --color-gold-light:   rgba(255,183,3,0.12);
    --bg-brand:           #0A192F;
    --bg-form:            #FFFFFF;
    --text-brand:         rgba(255,255,255,0.90);
    --text-brand-dim:     rgba(255,255,255,0.50);
    --text-primary:       #0D0D0D;
    --text-secondary:     #6B7280;
    --text-hint:          #9CA3AF;
    --border-color:       #E5E7EB;
    --border-focus:       #FFB703;
    --shadow-card:        0 8px 40px rgba(0,0,0,0.10);
    --radius-md:          10px;
    --radius-lg:          14px;
    --radius-xl:          20px;
    --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI",
                 "PingFang SC", "Hiragino Sans GB",
                 "Microsoft YaHei", sans-serif;
    --transition: 0.2s ease;
}

html, body {
    height: 100%;
    font-family: var(--font-base);
    background: var(--bg-brand);
    overflow: hidden;
}

/* ========================================
   整体布局
   ======================================== */
.login-page {
    display: flex;
    height: 100vh;
    width: 100%;
}

/* ========================================
   左侧品牌区
   ======================================== */
.login-brand {
    flex: 1;
    background: var(--bg-brand);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 56px;
    position: relative;
    overflow: hidden;
}

/* 背景光晕装饰 */
.login-brand::before {
    content: '';
    position: absolute;
    top: -120px;
    left: -120px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle,
        rgba(27,67,50,0.6) 0%,
        transparent 70%);
    pointer-events: none;
}

.login-brand::after {
    content: '';
    position: absolute;
    bottom: -80px;
    right: -80px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle,
        rgba(255,183,3,0.08) 0%,
        transparent 70%);
    pointer-events: none;
}

.brand-content {
    position: relative;
    z-index: 1;
    max-width: 420px;
    width: 100%;
}

/* Logo */
.brand-logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 36px;
}

.brand-logo-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--color-primary);
    border: 1px solid rgba(255,183,3,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    flex-shrink: 0;
}

.brand-logo-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-brand);
    letter-spacing: 0.02em;
}

/* 主标题 */
.brand-headline {
    font-size: 38px;
    font-weight: 700;
    color: var(--text-brand);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.brand-headline.accent {
    color: var(--color-gold);
    margin-bottom: 32px;
}

/* 数据背书 */
.brand-stats {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 32px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    padding: 16px 0;
}

.brand-stat-item {
    flex: 1;
    text-align: center;
    padding: 0 16px;
}

.brand-stat-num {
    font-size: 26px;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1.2;
    margin-bottom: 4px;
}

.brand-stat-num span {
    font-size: 16px;
    font-weight: 600;
}

.brand-stat-label {
    font-size: 12px;
    color: var(--text-brand-dim);
}

.brand-stat-divider {
    width: 1px;
    height: 36px;
    background: rgba(255,255,255,0.08);
    flex-shrink: 0;
}

/* 特性列表 */
.brand-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-brand-dim);
    line-height: 1.5;
}

.feature-icon {
    width: 26px;
    height: 26px;
    border-radius: 8px;
    background: rgba(255,183,3,0.12);
    border: 1px solid rgba(255,183,3,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gold);
    flex-shrink: 0;
}

/* 数据折线图 */
.brand-chart {
    position: relative;
}

.brand-chart svg {
    width: 100%;
    height: 80px;
    display: block;
}

.brand-chart-label {
    position: absolute;
    top: 8px;
    right: 0;
    font-size: 11px;
    color: var(--text-brand-dim);
}

/* ========================================
   右侧表单区
   ======================================== */
.login-form-area {
    width: 460px;
    flex-shrink: 0;
    background: var(--bg-form);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 40px;
    overflow-y: auto;
}

.login-card {
    width: 100%;
    max-width: 360px;
}

/* 手机端 Logo */
.mobile-logo {
    display: none;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
}

.mobile-logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    flex-shrink: 0;
}

.mobile-logo span {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

/* 卡片标题 */
.card-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.card-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 28px;
    line-height: 1.5;
}

/* ========================================
   Tab 切换（滑块式）
   ======================================== */
.auth-tabs {
    margin-bottom: 24px;
}

.auth-tabs-track {
    position: relative;
    display: flex;
    background: #F3F4F6;
    border-radius: var(--radius-md);
    padding: 3px;
}

.auth-tabs-slider {
    position: absolute;
    top: 3px;
    left: 3px;
    width: calc(50% - 3px);
    height: calc(100% - 6px);
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.10);
    transition: transform var(--transition);
    pointer-events: none;
}

.auth-tabs-slider.slide-right {
    transform: translateX(100%);
}

.auth-tab {
    flex: 1;
    padding: 9px 0;
    background: none;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-hint);
    cursor: pointer;
    font-family: var(--font-base);
    transition: color var(--transition);
    position: relative;
    z-index: 1;
}

.auth-tab.active {
    color: var(--text-primary);
    font-weight: 600;
}

/* ========================================
   表单
   ======================================== */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

/* 输入框容器 */
.input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 12px;
    color: var(--text-hint);
    display: flex;
    align-items: center;
    pointer-events: none;
    z-index: 1;
}

.form-input {
    width: 100%;
    padding: 11px 40px 11px 38px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: var(--font-base);
    color: var(--text-primary);
    background: #ffffff;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

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

.form-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(255,183,3,0.12);
}

/* 密码显隐按钮 */
.eye-btn {
    position: absolute;
    right: 10px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-hint);
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: color var(--transition);
}

.eye-btn:hover {
    color: var(--text-secondary);
}

/* 错误提示 */
.form-error {
    font-size: 13px;
    color: #EF4444;
    min-height: 18px;
    line-height: 1.4;
}

/* 提交按钮 */
.btn-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 13px;
    background: var(--color-gold);
    color: #000000;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    font-family: var(--font-base);
    transition: background var(--transition), transform var(--transition),
                box-shadow var(--transition);
    margin-top: 4px;
    box-shadow: 0 2px 8px rgba(255,183,3,0.30);
}

.btn-submit:hover {
    background: var(--color-gold-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(255,183,3,0.35);
}

.btn-submit:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(255,183,3,0.25);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ========================================
   底部
   ======================================== */
.login-footer {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.security-badge {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--text-hint);
}

.security-badge svg {
    color: var(--text-hint);
    flex-shrink: 0;
}

.back-link {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition);
}

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

/* ========================================
   响应式：平板（≤1024px）
   ======================================== */
@media (max-width: 1024px) {
    .login-form-area {
        width: 420px;
        padding: 32px 32px;
    }

    .brand-headline {
        font-size: 32px;
    }

    .login-brand {
        padding: 40px 40px;
    }
}

/* ========================================
   响应式：手机端（≤768px）
   ======================================== */
@media (max-width: 768px) {
    html, body {
        overflow: auto;
    }

    .login-page {
        flex-direction: column;
        height: auto;
        min-height: 100vh;
    }

    /* 隐藏左侧品牌区 */
    .login-brand {
        display: none;
    }

    /* 表单区占满全屏 */
    .login-form-area {
        width: 100%;
        min-height: 100vh;
        padding: 32px 24px 40px;
        align-items: flex-start;
        padding-top: 48px;
    }

    .login-card {
        max-width: 100%;
    }

    /* 显示手机端 Logo */
    .mobile-logo {
        display: flex;
    }

    .card-title {
        font-size: 22px;
    }
}

/* ========================================
   响应式：小屏手机（≤375px）
   ======================================== */
@media (max-width: 375px) {
    .login-form-area {
        padding: 32px 20px 40px;
    }

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