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

:root {
    /* 核心色彩 */
    --color-primary:       #1B4332;
    --color-primary-dark:  #143728;
    --color-primary-light: #D1FAE5;
    --color-gold:          #FFB703;
    --color-gold-hover:    #E5A500;
    --color-gold-light:    #FFF8E1;

    /* 背景色 */
    --bg-page:      #F8F9FA;
    --bg-panel:     #FFFFFF;
    --bg-sidebar:   #143728;
    --bg-hover:     rgba(255,255,255,0.08);
    --bg-active:    rgba(255,255,255,0.14);
    --bg-input:     #FFFFFF;

    /* 文字色 */
    --text-primary:   #0D0D0D;
    --text-secondary: #6B7280;
    --text-hint:      #9CA3AF;
    --text-sidebar:   rgba(255,255,255,0.85);
    --text-sidebar-dim: rgba(255,255,255,0.45);

    /* 边框 */
    --border-color:  #E5E7EB;
    --border-panel:  #E5E7EB;

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.14);
    --shadow-panel: 2px 0 16px rgba(0,0,0,0.08);

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    /* 尺寸 */
    --sidebar-width:    260px;
    --right-panel-width: 320px;
    --topbar-height:    56px;
    --tabbar-height:    60px;

    /* 字体 */
    --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);
    font-size: 15px;
    background: var(--bg-page);
    color: var(--text-primary);
    overflow: hidden;
}

/* ========================================
   整体布局：三栏
   ======================================== */
body {
    display: flex;
    height: 100vh;
}

/* ========================================
   左侧边栏
   ======================================== */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width var(--transition), transform var(--transition);
    overflow: hidden;
    z-index: 100;
    box-shadow: var(--shadow-panel);
}

.sidebar.collapsed {
    width: 0;
}

/* 侧边栏顶部 */
.sidebar-header {
    position: relative;
    padding: 0;
    flex-shrink: 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar-logo {
    width: 100%;
}

.sidebar-toggle {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0,0,0,0.45);
    border: none;
    cursor: pointer;
    color: #ffffff;
    padding: 6px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), color var(--transition);
    z-index: 10;
}

.sidebar-toggle:hover {
    background: rgba(0,0,0,0.65);
    color: #ffffff;
}

/* 新对话按钮 */
.sidebar-actions {
    padding: 10px 8px 6px;
    flex-shrink: 0;
}

.new-chat-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 9px 12px;
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: var(--radius-md);
    color: var(--text-sidebar);
    font-size: 13px;
    font-family: var(--font-base);
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
    white-space: nowrap;
}

.new-chat-btn:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.18);
}

/* 侧边栏可滚动区域 */
.sidebar-scrollable {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 4px 0;
}

.sidebar-scrollable::-webkit-scrollbar {
    width: 4px;
}

.sidebar-scrollable::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-scrollable::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.12);
    border-radius: 2px;
}

/* 侧边栏分区 */
.sidebar-section {
    margin-bottom: 4px;
}

.sidebar-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px 6px;
    cursor: pointer;
    user-select: none;
    transition: background var(--transition);
    border-radius: var(--radius-sm);
    margin: 0 4px;
}

.sidebar-section-header:hover {
    background: var(--bg-hover);
}

.sidebar-section-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-sidebar-dim);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    white-space: nowrap;
}

.section-arrow {
    color: var(--text-sidebar-dim);
    transition: transform var(--transition);
    flex-shrink: 0;
}

.sidebar-section.collapsed .section-arrow {
    transform: rotate(-90deg);
}

.sidebar-section-body {
    padding: 2px 6px;
    overflow: hidden;
    transition: max-height 0.25s ease;
}

.sidebar-section.collapsed .sidebar-section-body {
    display: none;
}

/* 侧边栏空状态 */
.sidebar-empty {
    padding: 10px 8px;
    font-size: 12px;
    color: var(--text-sidebar-dim);
    text-align: center;
}

/* 历史对话列表项 */
.history-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition);
}

.history-item:hover {
    background: var(--bg-hover);
}

.history-item.active {
    background: var(--bg-active);
}

.history-item-title {
    flex: 1;
    font-size: 13px;
    color: var(--text-sidebar);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
}

.history-item-del {
    width: 20px;
    height: 20px;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--text-sidebar-dim);
    border-radius: 4px;
    display: none;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition);
    padding: 0;
}

.history-item:hover .history-item-del {
    display: flex;
}

.history-item-del:hover {
    background: rgba(239,68,68,0.2);
    color: #fca5a5;
}

/* 方案列表项 */
.plan-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition);
}

.plan-item:hover {
    background: var(--bg-hover);
}

.plan-item.active {
    background: var(--bg-active);
}

.plan-item-left {
    flex: 1;
    min-width: 0;
}

.plan-item-title {
    font-size: 13px;
    color: var(--text-sidebar);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
}

.plan-item-meta {
    font-size: 11px;
    color: var(--text-sidebar-dim);
    margin-top: 2px;
}

.plan-type-tag {
    display: inline-flex;
    align-items: center;
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    margin-right: 4px;
}

.plan-type-tag.type-完整 { background: rgba(255,183,3,0.2); color: #FFB703; }
.plan-type-tag.type-冲   { background: rgba(239,68,68,0.2);  color: #fca5a5; }
.plan-type-tag.type-稳   { background: rgba(59,130,246,0.2); color: #93c5fd; }
.plan-type-tag.type-保   { background: rgba(16,185,129,0.2); color: #6ee7b7; }

.plan-item-del {
    width: 20px;
    height: 20px;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--text-sidebar-dim);
    border-radius: 4px;
    display: none;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition);
    padding: 0;
}

.plan-item:hover .plan-item-del {
    display: flex;
}

.plan-item-del:hover {
    background: rgba(239,68,68,0.2);
    color: #fca5a5;
}

/* 侧边栏中间可滚动区域（让底部固定） */
.sidebar-scrollable {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    min-height: 0; /* 关键：防止内容撑破父容器 */
    padding: 4px 0;
}

.sidebar-scrollable::-webkit-scrollbar {
    width: 5px;
}
.sidebar-scrollable::-webkit-scrollbar-track {
    background: transparent;
}
.sidebar-scrollable::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.15);
    border-radius: 3px;
}

/* 侧边栏底部 */
.sidebar-footer {
    padding: 8px;
    border-top: 1px solid rgba(255,255,255,0.06);
    flex-shrink: 0;
}

.sidebar-user-info {
    padding: 8px 6px 10px;
}

.sidebar-user-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.sidebar-user-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 2px solid rgba(255,183,3,0.5);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-user-detail {
    flex: 1;
    min-width: 0;
}

.sidebar-user-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-sidebar);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-badge {
    font-size: 11px;
    color: var(--text-sidebar-dim);
    margin-top: 1px;
}

.sidebar-usage {
    font-size: 11px;
    color: var(--text-sidebar-dim);
    padding-left: 2px;
}

.admin-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 12px;
    color: var(--text-sidebar-dim);
    text-decoration: none;
    transition: background var(--transition), color var(--transition);
    white-space: nowrap;
}

.admin-btn:hover {
    background: var(--bg-hover);
    color: var(--text-sidebar);
}

/* ========================================
   遮罩层
   ======================================== */
.sidebar-overlay,
.panel-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    z-index: 299;
    backdrop-filter: blur(2px);
}

.sidebar-overlay.active,
.panel-overlay.active {
    display: block;
}

/* ========================================
   主内容区
   ======================================== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background: var(--bg-panel);
    min-width: 0;
}

/* ========================================
   顶部导航栏
   ======================================== */
.topbar {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    padding: 0 14px;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    background: var(--bg-panel);
}

.topbar-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 6px;
    border-radius: var(--radius-sm);
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
    flex-shrink: 0;
}

.topbar-menu-btn:hover { background: var(--bg-page); }

.topbar-toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 6px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
    flex-shrink: 0;
}

.topbar-toggle-btn:hover { background: var(--bg-page); }

.topbar-right {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-shrink: 0;
}

/* 档案面板切换按钮 */
.topbar-panel-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    font-family: var(--font-base);
    transition: all var(--transition);
    white-space: nowrap;
}

.topbar-panel-btn:hover,
.topbar-panel-btn.active {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ========================================
   模型选择下拉
   ======================================== */
.model-selector { position: relative; }

.model-selector-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    background: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-base);
    transition: background var(--transition);
    white-space: nowrap;
}

.model-selector-btn:hover { background: var(--bg-page); }

.model-selector-btn svg {
    color: var(--text-secondary);
    transition: transform var(--transition);
    flex-shrink: 0;
}

.model-selector.open .model-selector-btn svg {
    transform: rotate(180deg);
}

.model-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 290px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 6px;
    z-index: 200;
}

.model-selector.open .model-dropdown { display: block; }

.model-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition);
    gap: 10px;
}

.model-option:hover { background: var(--bg-page); }

.model-option-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.model-option-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
    overflow: hidden; /* 新增：确保图片被裁剪为圆形 */
}

/* 新增：模型图标图片样式 */
.model-option-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.model-option-icon.top    { background: #fef3c7; color: #d97706; }
.model-option-icon.high   { background: #ede9fe; color: #7c3aed; }
.model-option-icon.normal { background: var(--color-primary-light); color: var(--color-primary); }

.model-option-info { flex: 1; min-width: 0; }

.model-option-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.model-option-desc {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.model-option-check {
    color: var(--color-primary);
    flex-shrink: 0;
}

/* ========================================
   顶栏用户区
   ======================================== */
.btn-login-entry {
    padding: 6px 14px;
    background: var(--color-primary);
    color: #ffffff;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    transition: background var(--transition);
    white-space: nowrap;
}

.btn-login-entry:hover { background: var(--color-primary-dark); }

.user-menu-wrap { position: relative; }

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 4px 10px 4px 4px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: background var(--transition);
    font-family: var(--font-base);
}

.user-menu-btn:hover { background: var(--bg-page); }

.user-avatar {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #ffffff;
    font-size: 11px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-nickname {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 会员等级标签 */
.member-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 7px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}

.member-badge.tier-0 { background: #F3F4F6; color: #6B7280; }
.member-badge.tier-1 { background: var(--color-primary-light); color: var(--color-primary); }
.member-badge.tier-2 { background: #DBEAFE; color: #2563EB; }
.member-badge.tier-3 { background: var(--color-gold-light); color: var(--color-gold-hover); }

/* 用户下拉菜单 */
.user-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 190px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 6px;
    z-index: 200;
}

.user-menu-wrap.open .user-dropdown { display: block; }

.user-dropdown-info {
    padding: 8px 10px;
}

.dropdown-nickname {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 3px;
}

.dropdown-usage {
    font-size: 11px;
    color: var(--text-secondary);
}

.user-dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 4px 0;
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 10px;
    border: none;
    background: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
    font-family: var(--font-base);
    transition: all var(--transition);
    text-align: left;
}

.upgrade-item:hover {
    background: var(--color-gold-light);
    color: var(--color-gold-hover);
}

.logout-item:hover {
    background: #FEF2F2;
    color: #EF4444;
}

/* ========================================
   对话消息区
   ======================================== */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar { width: 5px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

/* ========================================
   欢迎页
   ======================================== */
.welcome-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 20px 20px;
    gap: 28px;
    min-height: 0;
}

.welcome-hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-align: center;
}

.welcome-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    margin-bottom: 4px;
    box-shadow: 0 4px 16px rgba(27,67,50,0.25);
}

.welcome-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.welcome-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    max-width: 380px;
    line-height: 1.6;
}

/* 快捷提问卡片 */
.welcome-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    width: 100%;
    max-width: 600px;
}

.welcome-card {
    background: var(--bg-page);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
}

.welcome-card:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.welcome-card-icon {
    font-size: 20px;
    margin-bottom: 6px;
}

.welcome-card-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.welcome-card-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ========================================
   消息气泡
   ======================================== */
.message {
    display: flex;
    gap: 12px;
    max-width: 760px;
    width: 100%;
    margin: 0 auto;
    animation: fadeInUp 0.22s ease;
}

.user-message {
    flex-direction: row-reverse;
    align-self: flex-end;
    margin-left: auto;
    max-width: 72%;
}

.ai-message {
    align-self: flex-start;
    width: 100%;
    max-width: 760px;
}

.msg-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 12px;
    font-weight: 700;
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.user-message .msg-avatar {
    background: var(--color-primary);
    color: #ffffff;
}

.msg-content {
    padding: 11px 15px;
    border-radius: var(--radius-lg);
    font-size: 18px;
    line-height: 1.75;
    word-break: break-word;
    min-width: 0;
    flex: 1;
}

.user-message .msg-content {
    background: #1dc37e;
    color: #0D0D0D;
    border-bottom-right-radius: 4px;
}

.ai-message .msg-content {
    background: #ffffff;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

/* Markdown 样式 */
.msg-content h1,
.msg-content h2,
.msg-content h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 10px 0 4px;
    line-height: 1.5;
}

.msg-content p   { margin: 4px 0; line-height: 1.8; }
.msg-content ul  { padding-left: 20px; margin: 4px 0; }
.msg-content li  { margin: 3px 0; line-height: 1.8; }

.msg-content strong {
    font-weight: 600;
    color: var(--text-primary);
}

.msg-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 10px 0;
}

.msg-content code {
    font-family: "Courier New", Consolas, monospace;
    font-size: 13px;
    background: var(--bg-page);
    padding: 1px 5px;
    border-radius: 4px;
    color: #d97706;
}

.msg-content pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 8px 0;
    font-size: 13px;
    line-height: 1.6;
}

.msg-content pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

.msg-content table {
    border-collapse: collapse;
    width: 100%;
    margin: 8px 0;
    font-size: 13px;
}

.msg-content table td,
.msg-content table th {
    border: 1px solid var(--border-color);
    padding: 6px 10px;
    text-align: left;
}

.msg-content table thead tr {
    background: var(--bg-page);
}

/* 骨架屏 */
.skeleton-box {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 4px 0;
}

.skeleton-line {
    height: 14px;
    border-radius: 6px;
    background: linear-gradient(
        90deg,
        var(--border-color) 25%,
        rgba(255,255,255,0.6) 50%,
        var(--border-color) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.4s infinite;
}

@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* 打字机光标 */
.typing-cursor::after {
    content: '▋';
    animation: blink 0.8s infinite;
    color: var(--color-primary);
    font-size: 13px;
}

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

/* 消息操作按钮 */
.msg-actions {
    display: flex;
    gap: 6px;
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px dashed var(--border-color);
    flex-wrap: wrap;
}

.msg-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-base);
}

.msg-action-btn:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.msg-action-btn.save-plan-btn:hover {
    background: var(--color-gold-light);
    border-color: var(--color-gold);
    color: var(--color-gold-hover);
}

/* ========================================
   底部输入区
   ======================================== */
.input-area {
    padding: 10px 16px 14px;
    background: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

/* 免费用户查询面板 */
.query-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 0 4px;
    gap: 8px;
}

.query-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    max-width: 560px;
    padding: 12px 20px;
    background: var(--color-primary);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-base);
    transition: all var(--transition);
    box-shadow: 0 2px 8px rgba(27,67,50,0.2);
}

.query-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(27,67,50,0.3);
}

.query-hint {
    font-size: 12px;
    color: var(--text-hint);
}

/* 输入框 */
.input-box-wrap {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    background: var(--bg-input);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 8px 8px 8px 14px;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.input-box-wrap:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(27,67,50,0.08);
}

.input-attach-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-hint);
    padding: 5px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: color var(--transition);
}

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

#user-input {
    flex: 1;
    border: none;
    background: none;
    font-size: 15px;
    font-family: var(--font-base);
    color: var(--text-primary);
    resize: none;
    outline: none;
    line-height: 1.5;
    max-height: 140px;
    overflow-y: auto;
    padding: 4px 0;
}

#user-input::placeholder { color: var(--text-hint); }

.input-send-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border-radius: 50%;
    transition: transform var(--transition), opacity var(--transition);
    margin-bottom: 1px;
}

.input-send-btn:hover   { transform: scale(1.08); }
.input-send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.input-footer-hint {
    text-align: center;
    font-size: 11px;
    color: var(--text-hint);
    margin-top: 6px;
}

/* 次数不足警告条 */
.usage-warning {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 12px;
    background: #FFFBEB;
    border: 1px solid #FDE68A;
    border-radius: var(--radius-md);
    margin-bottom: 8px;
    font-size: 12px;
    color: #92400E;
}

.usage-warning a {
    color: var(--color-gold-hover);
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
}

.usage-warning a:hover { text-decoration: underline; }

/* ========================================
   右侧档案面板
   ======================================== */
.right-panel {
    width: var(--right-panel-width);
    height: 100vh;
    background: var(--bg-panel);
    border-left: 1px solid var(--border-panel);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width var(--transition), transform var(--transition);
    overflow: hidden;
    z-index: 100;
}

.right-panel.collapsed {
    width: 0;
    border-left: none;
}

.right-panel-header {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.right-panel-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.right-panel-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 5px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}

.right-panel-close:hover { background: var(--bg-page); }

.right-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.right-panel-body::-webkit-scrollbar { width: 4px; }
.right-panel-body::-webkit-scrollbar-track { background: transparent; }
.right-panel-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

/* 用户信息卡片 */
.profile-user-card {
    background: var(--color-primary);
    border-radius: var(--radius-lg);
    padding: 14px;
    color: #ffffff;
}

.profile-user-card-inner {
    display: flex;
    align-items: center;
    gap: 10px;
}

.puc-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    border: 2px solid rgba(255,183,3,0.6);
    color: #ffffff;
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.puc-info {
    flex: 1;
    min-width: 0;
}

.puc-name {
    font-size: 14px;
    font-weight: 600;
    color: #ffffff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
}

.puc-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.puc-usage {
    font-size: 11px;
    color: rgba(255,255,255,0.65);
}

.puc-upgrade-btn {
    padding: 5px 10px;
    background: var(--color-gold);
    color: #000000;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    font-family: var(--font-base);
    transition: background var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

.puc-upgrade-btn:hover { background: var(--color-gold-hover); }

.puc-guest-text {
    font-size: 13px;
    color: rgba(255,255,255,0.8);
    flex: 1;
}

.puc-login-btn {
    padding: 6px 12px;
    background: var(--color-gold);
    color: #000000;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 700;
    text-decoration: none;
    transition: background var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

.puc-login-btn:hover { background: var(--color-gold-hover); }

/* 考生信息表单 */
.profile-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.profile-form-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-hint);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.profile-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.profile-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.profile-label-hint {
    font-weight: 400;
    color: var(--text-hint);
    font-size: 11px;
}

/* 科类选择 */
.subject-tabs {
    display: flex;
    gap: 6px;
}

.subject-tab {
    flex: 1;
    padding: 7px 10px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-panel);
    font-size: 13px;
    font-family: var(--font-base);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition);
    text-align: center;
}

.subject-tab:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.subject-tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
    font-weight: 500;
}

/* 省份选择 */
.profile-select {
    width: 100%;
    padding: 8px 10px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-panel);
    font-size: 13px;
    font-family: var(--font-base);
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition);
}

.profile-select:focus { border-color: var(--color-primary); }

/* 选科组合 */
.subjects-picker {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.subject-chip {
    padding: 4px 10px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-xl);
    background: var(--bg-panel);
    font-size: 12px;
    font-family: var(--font-base);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition);
    white-space: nowrap;
    user-select: none;
}

.subject-chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.subject-chip.selected {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
    font-weight: 500;
}

.subject-chip.fixed {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
    cursor: default;
    font-weight: 500;
}

.subjects-hint {
    font-size: 11px;
    color: var(--text-hint);
    align-self: center;
    white-space: nowrap;
}

/* 分数滑块 */
.score-input-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.score-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(to right,
        var(--color-primary) 0%,
        var(--color-primary) 58.3%,
        var(--border-color) 58.3%);
    outline: none;
    cursor: pointer;
}

.score-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    box-shadow: 0 0 0 3px rgba(27,67,50,0.15);
    transition: box-shadow var(--transition);
}

.score-slider::-webkit-slider-thumb:hover {
    box-shadow: 0 0 0 5px rgba(27,67,50,0.2);
}

.score-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 0 3px rgba(27,67,50,0.15);
}

.score-number-input {
    width: 60px;
    padding: 5px 6px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    outline: none;
    transition: border-color var(--transition);
    background: var(--bg-panel);
    font-family: var(--font-base);
}

.score-number-input:focus { border-color: var(--color-primary); }

.score-unit {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* 位次输入 */
.rank-input-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.rank-input {
    flex: 1;
    padding: 7px 10px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    font-family: var(--font-base);
    color: var(--text-primary);
    outline: none;
    transition: border-color var(--transition);
    background: var(--bg-panel);
}

.rank-input:focus { border-color: var(--color-primary); }

/* ========================================
   手机端底部 Tab 导航
   ======================================== */
.mobile-tabbar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--tabbar-height);
    background: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    z-index: 300;
    padding: 0 4px;
    align-items: center;
    justify-content: space-around;
    box-shadow: 0 -2px 12px rgba(0,0,0,0.06);
}

.tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    flex: 1;
    padding: 6px 4px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-hint);
    font-size: 10px;
    font-family: var(--font-base);
    transition: color var(--transition);
    border-radius: var(--radius-sm);
}

.tab-item.active {
    color: var(--color-primary);
}

.tab-item svg {
    transition: stroke var(--transition);
}

/* ========================================
   手机端"我的"抽屉
   ======================================== */
.me-drawer {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-panel);
    border-radius: 20px 20px 0 0;
    box-shadow: 0 -4px 24px rgba(0,0,0,0.12);
    z-index: 400;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.me-drawer.open {
    transform: translateY(0);
}

.me-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 12px;
    border-bottom: 1px solid var(--border-color);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.me-drawer-header button {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 4px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.me-drawer-body {
    padding: 16px 20px 24px;
}

.me-user-card {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.me-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #ffffff;
    font-size: 16px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.me-info {
    flex: 1;
    min-width: 0;
}

.me-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.me-usage {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 14px;
}

.me-upgrade-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 12px;
    background: var(--color-gold);
    color: #000000;
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    margin-bottom: 10px;
    transition: background var(--transition);
}

.me-upgrade-btn:hover { background: var(--color-gold-hover); }

.me-logout-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 11px;
    background: none;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    font-family: var(--font-base);
    transition: all var(--transition);
}

.me-logout-btn:hover {
    background: #FEF2F2;
    border-color: #FECACA;
    color: #EF4444;
}

.me-guest-tip {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 14px;
    line-height: 1.6;
}

.me-login-btn {
    display: block;
    text-align: center;
    padding: 12px;
    background: var(--color-primary);
    color: #ffffff;
    border-radius: var(--radius-lg);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: background var(--transition);
}

.me-login-btn:hover { background: var(--color-primary-dark); }

/* ========================================
   未登录提示
   ======================================== */
.login-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 28px 16px;
    text-align: center;
}

.login-prompt-icon   { font-size: 36px; }

.login-prompt-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.login-prompt-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.login-prompt-btn {
    display: inline-flex;
    align-items: center;
    padding: 9px 24px;
    background: var(--color-primary);
    color: #ffffff;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: background var(--transition);
    margin-top: 4px;
}

.login-prompt-btn:hover { background: var(--color-primary-dark); }

/* ========================================
   弹窗
   ======================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
}

.modal {
    background: var(--bg-panel);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    animation: modalFadeIn 0.2s ease-out;
}

@keyframes modalFadeIn {
    from { opacity: 0; transform: translateY(-16px) scale(0.96); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px 14px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    width: 28px;
    height: 28px;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}

.modal-close:hover { background: var(--bg-page); }

.modal-body { padding: 16px 20px; }

.modal-body p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0 0 12px;
}

.form-group { margin-top: 10px; }

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-select,
.form-input-text {
    width: 100%;
    padding: 9px 10px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    font-family: var(--font-base);
    color: var(--text-primary);
    background: var(--bg-panel);
    outline: none;
    transition: border-color var(--transition);
}

.form-select:focus,
.form-input-text:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(27,67,50,0.08);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 12px 20px 18px;
    border-top: 1px solid var(--border-color);
}

.btn-secondary {
    padding: 8px 16px;
    background: var(--bg-panel);
    color: var(--text-primary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-base);
    transition: all var(--transition);
}

.btn-secondary:hover {
    background: var(--bg-page);
    border-color: #D1D5DB;
}

.btn-primary {
    padding: 8px 16px;
    background: var(--color-primary);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-base);
    transition: background var(--transition);
}

.btn-primary:hover { background: var(--color-primary-dark); }

/* ========================================
   动画
   ======================================== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ========================================
   响应式：平板（768px ~ 1024px）
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 220px;
        --right-panel-width: 290px;
    }

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

/* ========================================
   响应式：手机端（≤768px）
   ======================================== */
@media (max-width: 768px) {

    /* 侧边栏变抽屉 */
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: calc(100vh - var(--tabbar-height));
        height: calc(100dvh - var(--tabbar-height)); /* 兼容移动端动态视口 */
        width: var(--sidebar-width) !important;
        transform: translateX(-100%);
        z-index: 300;
        display: flex;
        flex-direction: column;
        overflow: hidden;
    }

    .sidebar.mobile-open {
        transform: translateX(0);
    }

    /* 右侧面板变底部抽屉 */
    .right-panel {
        position: fixed;
        bottom: var(--tabbar-height);
        left: 0;
        right: 0;
        width: 100% !important;
        height: auto;
        max-height: 75vh;
        border-left: none;
        border-top: 1px solid var(--border-color);
        border-radius: 20px 20px 0 0;
        box-shadow: 0 -4px 24px rgba(0,0,0,0.12);
        z-index: 300;
        transform: translateY(100%);
        transition: transform 0.3s ease;
    }

    .right-panel.mobile-open {
        transform: translateY(0);
    }

    .right-panel.collapsed {
        width: 100% !important;
        transform: translateY(100%);
    }

    /* 主内容区底部留出 tabbar 空间 */
    .main-content {
        padding-bottom: var(--tabbar-height);
    }

    /* 显示底部 tabbar */
    .mobile-tabbar {
        display: flex;
    }

    /* 显示"我的"抽屉 */
    .me-drawer {
        display: block;
    }

    /* 隐藏 PC 端元素 */
    .topbar-toggle-btn  { display: none; }
    .topbar-panel-btn   { display: none; }
    .user-nickname      { display: none; }
    .member-badge       { display: none; }

    .topbar-menu-btn {
        display: flex;
    }

    .user-menu-btn {
        padding: 3px;
        border: none;
        border-radius: 50%;
    }

    /* 消息区 */
    .chat-messages {
        padding: 16px 12px;
        gap: 16px;
    }

    .message    { max-width: 100%; }
    .user-message { max-width: 88%; }

    /* 欢迎页 */
    .welcome-cards {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .welcome-title    { font-size: 18px; }
    .welcome-subtitle { font-size: 13px; }

    /* 输入区 */
    .input-area { padding: 8px 12px 10px; }

    /* 模型下拉 */
    .model-dropdown {
        min-width: 250px;
        left: -8px;
    }
}

/* ========================================
   响应式：小屏手机（≤375px）
   ======================================== */
@media (max-width: 375px) {
    .welcome-cards          { grid-template-columns: 1fr; }
    .welcome-title          { font-size: 16px; }
    .model-selector-btn     { font-size: 13px; }
    .welcome-card-desc      { display: none; }
}

/* ========================================
   升级会员弹窗样式（需求5）
   ======================================== */
.upgrade-modal-box {
    background: #ffffff;
    border-radius: 20px;
    width: 92%;
    max-width: 880px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    animation: modalFadeIn 0.25s ease-out;
    max-height: 90vh;
    overflow-y: auto;
}

.upgrade-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 32px 16px;
    border-bottom: 1px solid #E5E7EB;
}

.upgrade-modal-header h2 {
    font-size: 22px;
    font-weight: 700;
    color: #0D0D0D;
    margin: 0;
}

.upgrade-modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    cursor: pointer;
    color: #6B7280;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.upgrade-modal-close:hover {
    background: #F3F4F6;
}

.upgrade-modal-body {
    padding: 24px 32px 32px;
}

.plan-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.plan-card {
    background: #ffffff;
    border: 2px solid #E5E7EB;
    border-radius: 16px;
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.2s;
    position: relative;
}

.plan-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

/* 推荐套餐（登科 - 绿色系） */
.plan-card.highlight {
    border-color: #1B4332;
    background: #F0FDF4; 
}

/* 顶级套餐（夺魁 - 金色系） */
.plan-card.gold {
    border-color: #FFB703;
    background: #FFFBEB; 
}

.plan-card-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: #1B4332;
    color: #ffffff;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.plan-card-name {
    font-size: 18px;
    font-weight: 700;
    color: #0D0D0D;
    margin-bottom: 8px;
    margin-top: 4px;
}

.plan-card-price {
    font-size: 32px;
    font-weight: 800;
    color: #0D0D0D;
    margin-bottom: 4px;
    line-height: 1.2;
}

.plan-card-price span {
    font-size: 14px;
    font-weight: 500;
    color: #6B7280;
}

.plan-card-desc {
    font-size: 13px;
    color: #6B7280;
    margin-bottom: 20px;
}

.plan-card-features {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
    width: 100%;
    text-align: left;
}

.plan-card-features li {
    font-size: 13px;
    color: #0D0D0D;
    padding: 8px 0;
    border-bottom: 1px solid #F3F4F6;
    display: flex;
    align-items: center;
    gap: 8px;
    line-height: 1.4;
}

.plan-card-features li::before {
    content: '✓';
    color: #1B4332;
    font-weight: 700;
    flex-shrink: 0;
}

.plan-card.gold .plan-card-features li::before {
    color: #E5A500;
}

.plan-card-btn {
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    background: #1B4332;
    color: #ffffff;
    transition: background 0.2s, transform 0.2s;
    margin-top: auto;
}

.plan-card-btn:hover {
    background: #143728;
    transform: translateY(-1px);
}

.plan-card-btn.current {
    background: #E5E7EB;
    color: #9CA3AF;
    cursor: not-allowed;
    transform: none;
}

.plan-card.gold .plan-card-btn {
    background: #FFB703;
    color: #000000;
    box-shadow: 0 2px 8px rgba(255,183,3,0.3);
}

.plan-card.gold .plan-card-btn:hover {
    background: #E5A500;
}

/* 响应式：平板（≤1024px） */
@media (max-width: 1024px) {
    .plan-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 响应式：手机（≤768px） */
@media (max-width: 768px) {
    .upgrade-modal-header {
        padding: 20px 20px 14px;
    }
    .upgrade-modal-header h2 {
        font-size: 18px;
    }
    .upgrade-modal-body {
        padding: 16px 20px 24px;
    }
    .plan-cards {
        display: flex; /* 切换为 flex 布局 */
        flex-direction: column-reverse; /* 核心：垂直反向排列，夺魁在最上，免费在最下 */
        grid-template-columns: none; /* 清除 PC 端的 grid 属性 */
        max-width: 360px;
        margin: 0 auto;
    }
}

/* 修复升级弹窗遮罩层不显示的问题 */
#upgrade-modal-overlay {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    background: rgba(0, 0, 0, 0.6) !important;
    z-index: 99999 !important;
    align-items: center !important;
    justify-content: center !important;
    backdrop-filter: blur(3px);
}

/* ========================================
   院校推荐卡片
   ======================================== */
.school-cards-wrap {
    width: 100%;
    margin: 16px 0 8px;
}

.school-cards-title {
    font-size: 12px;
    color: #94A3B8;
    font-weight: 500;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.school-cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

@media (max-width: 768px) {
    .school-cards-grid {
        grid-template-columns: 1fr;
    }
}

.school-card {
    background: #FFFFFF;
    border: 1px solid #E2E8F0;
    border-radius: 16px;
    padding: 18px 18px 14px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
    display: flex;
    flex-direction: column;
    gap: 0;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.school-card:hover {
    box-shadow: 0 8px 24px -4px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

/* 卡片顶部：校名 + 类型标签 */
.school-card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
}

.school-card-name {
    font-size: 17px;
    font-weight: 700;
    color: #0F172A;
    line-height: 1.3;
    flex: 1;
}

.school-card-tag {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
}

.school-card-tag.tag-冲 {
    background: #FFF1F2;
    color: #E11D48;
}

.school-card-tag.tag-稳 {
    background: #FFFBEB;
    color: #D97706;
}

.school-card-tag.tag-保 {
    background: #ECFDF5;
    color: #059669;
}

/* 专业行 */
.school-card-major {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: #64748B;
    margin-bottom: 14px;
}

.school-card-major svg {
    flex-shrink: 0;
    opacity: 0.6;
}

/* 分割线 */
.school-card-divider {
    height: 1px;
    background: #F1F5F9;
    margin-bottom: 14px;
}

/* 数据行：分数 + 位次 */
.school-card-stats {
    display: flex;
    gap: 0;
    margin-bottom: 14px;
}

.school-card-stat {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.school-card-stat:first-child {
    border-right: 1px solid #F1F5F9;
    padding-right: 14px;
    margin-right: 14px;
}

.school-card-stat-label {
    font-size: 11px;
    color: #94A3B8;
    font-weight: 500;
}

.school-card-stat-value {
    font-size: 22px;
    font-weight: 700;
    color: #0F172A;
    font-family: 'Roboto Mono', 'Courier New', monospace;
    line-height: 1.2;
}

/* 录取概率进度条 */
.school-card-prob-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.school-card-prob-text {
    font-size: 11px;
    color: #94A3B8;
    font-weight: 500;
}

.school-card-prob-pct {
    font-size: 13px;
    font-weight: 700;
    font-family: 'Roboto Mono', 'Courier New', monospace;
}

.school-card-prob-pct.pct-冲 { color: #E11D48; }
.school-card-prob-pct.pct-稳 { color: #D97706; }
.school-card-prob-pct.pct-保 { color: #059669; }

.school-card-prob-bar {
    height: 5px;
    background: #F1F5F9;
    border-radius: 99px;
    overflow: hidden;
    margin-bottom: 14px;
}

.school-card-prob-fill {
    height: 100%;
    border-radius: 99px;
    transition: width 0.8s cubic-bezier(0.4,0,0.2,1);
}

.school-card-prob-fill.fill-冲 { background: #E11D48; }
.school-card-prob-fill.fill-稳 { background: #D97706; }
.school-card-prob-fill.fill-保 { background: #059669; }

/* 底部：推荐理由 + 加号按钮 */
.school-card-bottom {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 10px;
}

.school-card-reason-wrap {
    flex: 1;
}

.school-card-reason-label {
    font-size: 11px;
    color: #94A3B8;
    font-weight: 500;
    margin-bottom: 3px;
}

.school-card-reason {
    font-size: 12px;
    color: #64748B;
    line-height: 1.5;
}

.school-card-add-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid #E2E8F0;
    background: #F8FAFC;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transition: all 0.2s ease;
    color: #64748B;
    font-size: 20px;
    font-weight: 300;
    line-height: 1;
}

.school-card-add-btn:hover {
    background: #0F172A;
    border-color: #0F172A;
    color: #FFFFFF;
    transform: scale(1.05);
}

/* 收藏按钮已收藏状态 */
.school-card-add-btn.favorited {
    background: #0F172A;
    border-color: #0F172A;
    color: #FFFFFF;
}

.school-card-add-btn.favorited:hover {
    background: #ef4444;
    border-color: #ef4444;
    color: #FFFFFF;
}

/* ========================================
   侧边栏收藏列表
   ======================================== */
.favorite-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    border-radius: var(--radius-md);
    cursor: default;
    transition: background var(--transition);
    gap: 8px;
}

.favorite-item:hover {
    background: rgba(255,255,255,0.08);
}

.favorite-item-left {
    flex: 1;
    min-width: 0;
}

.favorite-item-name {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255,255,255,0.9);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.favorite-item-major {
    font-size: 11px;
    color: rgba(255,255,255,0.5);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

.favorite-item-tag {
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 600;
    flex-shrink: 0;
}

.favorite-item-tag.tag-冲 { background: #FFF1F2; color: #E11D48; }
.favorite-item-tag.tag-稳 { background: #FFFBEB; color: #D97706; }
.favorite-item-tag.tag-保 { background: #ECFDF5; color: #059669; }

.favorite-item-del {
    background: none;
    border: none;
    cursor: pointer;
    color: rgba(255,255,255,0.3);
    padding: 3px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: color var(--transition);
    opacity: 0;
}

.favorite-item:hover .favorite-item-del {
    opacity: 1;
}

.favorite-item-del:hover {
    color: #ef4444;
}

/* ========================================
   收藏院校详情抽屉
   ======================================== */
.fav-drawer-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.3);
    z-index: 1200;
}

.fav-drawer-overlay.active {
    display: block;
}

.fav-drawer {
    position: fixed;
    top: 0;
    right: -380px;
    width: 360px;
    height: 100vh;
    background: #ffffff;
    z-index: 1201;
    display: flex;
    flex-direction: column;
    transition: right 0.3s cubic-bezier(0.4,0,0.2,1);
    box-shadow: -4px 0 24px rgba(0,0,0,0.1);
}

.fav-drawer.open {
    right: 0;
}

@media (max-width: 768px) {
    .fav-drawer {
        width: 100vw;
        right: -100vw;
    }
}

.fav-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    border-bottom: 1px solid #F1F5F9;
    flex-shrink: 0;
}

.fav-drawer-title {
    font-size: 16px;
    font-weight: 700;
    color: #0F172A;
}

.fav-drawer-close {
    background: none;
    border: none;
    cursor: pointer;
    color: #94A3B8;
    padding: 4px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}

.fav-drawer-close:hover {
    color: #0F172A;
}

.fav-drawer-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.fav-detail-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 6px;
}

.fav-detail-name {
    font-size: 22px;
    font-weight: 700;
    color: #0F172A;
    line-height: 1.3;
    flex: 1;
}

.fav-detail-tag {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
    margin-left: 10px;
}

.fav-detail-tag.tag-冲 { background: #FFF1F2; color: #E11D48; }
.fav-detail-tag.tag-稳 { background: #FFFBEB; color: #D97706; }
.fav-detail-tag.tag-保 { background: #ECFDF5; color: #059669; }

.fav-detail-major {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: #64748B;
    margin-bottom: 20px;
}

.fav-detail-divider {
    height: 1px;
    background: #F1F5F9;
    margin-bottom: 20px;
}

.fav-detail-stats {
    display: flex;
    gap: 0;
    margin-bottom: 20px;
}

.fav-detail-stat {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.fav-detail-stat:first-child {
    border-right: 1px solid #F1F5F9;
    padding-right: 16px;
    margin-right: 16px;
}

.fav-detail-stat-label {
    font-size: 12px;
    color: #94A3B8;
    font-weight: 500;
}

.fav-detail-stat-value {
    font-size: 28px;
    font-weight: 700;
    color: #0F172A;
    font-family: 'Roboto Mono', 'Courier New', monospace;
    line-height: 1.2;
}

.fav-detail-prob-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.fav-detail-prob-text {
    font-size: 12px;
    color: #94A3B8;
    font-weight: 500;
}

.fav-detail-prob-pct {
    font-size: 14px;
    font-weight: 700;
    font-family: 'Roboto Mono', 'Courier New', monospace;
}

.fav-detail-prob-pct.pct-冲 { color: #E11D48; }
.fav-detail-prob-pct.pct-稳 { color: #D97706; }
.fav-detail-prob-pct.pct-保 { color: #059669; }

.fav-detail-prob-bar {
    height: 6px;
    background: #F1F5F9;
    border-radius: 99px;
    overflow: hidden;
    margin-bottom: 20px;
}

.fav-detail-prob-fill {
    height: 100%;
    border-radius: 99px;
}

.fav-detail-prob-fill.fill-冲 { background: #E11D48; }
.fav-detail-prob-fill.fill-稳 { background: #D97706; }
.fav-detail-prob-fill.fill-保 { background: #059669; }

.fav-detail-reason-label {
    font-size: 12px;
    color: #94A3B8;
    font-weight: 500;
    margin-bottom: 6px;
}

.fav-detail-reason {
    font-size: 14px;
    color: #475569;
    line-height: 1.6;
    padding: 12px 14px;
    background: #F8FAFC;
    border-radius: 10px;
}

.fav-drawer-footer {
    padding: 16px 20px;
    border-top: 1px solid #F1F5F9;
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

.fav-drawer-website-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 11px 0;
    background: #F8FAFC;
    border: 1px solid #E2E8F0;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    color: #475569;
    text-decoration: none;
    transition: all 0.2s;
}

.fav-drawer-website-btn:hover {
    background: #0F172A;
    border-color: #0F172A;
    color: #ffffff;
}

.fav-drawer-remove-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 11px 0;
    background: #FFF1F2;
    border: 1px solid #FECDD3;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    color: #E11D48;
    cursor: pointer;
    font-family: var(--font-base);
    transition: all 0.2s;
}

.fav-drawer-remove-btn:hover {
    background: #E11D48;
    border-color: #E11D48;
    color: #ffffff;
}

/* ========================================
   侧边栏 Logo 悬浮文字（叠加在图片上）
   ======================================== */
.sidebar-logo {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-slogan-wrap {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    cursor: default;
}

.sidebar-slogan {
    font-size: 20px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.95);
    letter-spacing: 4px;
    text-indent: 4px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
}

.sidebar-slogan:hover {
    color: #FFB703;
    text-shadow: 
        0 0 8px rgba(255, 183, 3, 0.9),
        0 0 16px rgba(255, 183, 3, 0.6),
        0 0 32px rgba(255, 183, 3, 0.4);
    transform: scale(1.1);
}

.sidebar-website {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 0.5px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}