:root {
    --surface: rgba(255, 255, 255, 0.92);
    --text: #1f2937;
    --muted: #6b7280;
    --line: rgba(148, 163, 184, 0.24);
    --primary: #0f766e;
    --primary-light: #14b8a6;
    --success: #059669;
    --danger: #dc2626;
    --shadow: 0 24px 60px rgba(15, 23, 42, 0.14);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(15, 118, 110, 0.18), transparent 28%),
        radial-gradient(circle at bottom right, rgba(245, 158, 11, 0.16), transparent 20%),
        linear-gradient(180deg, #f8fbff 0%, #eef4f8 100%);
}

button,
input,
select {
    font: inherit;
}

.hidden {
    display: none !important;
}

/* ========== 认证页面 ========== */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 20px;
}

.auth-shell {
    width: min(1180px, 100%);
    display: grid;
    gap: 24px;
}

.login-shell {
    grid-template-columns: 1.2fr 0.9fr;
}

.register-shell {
    grid-template-columns: 1.1fr 0.8fr;
}

.auth-hero,
.auth-panel,
.register-side-card,
.topbar,
.sidebar,
.content-card {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.auth-hero,
.auth-panel,
.register-side-card,
.content-card {
    padding: 32px;
}

.auth-badge,
.topbar-tag,
.pill {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(15, 118, 110, 0.12);
    color: #115e59;
    font-size: 13px;
    font-weight: 700;
}

.auth-hero h1,
.register-side-card h1 {
    margin: 18px 0 12px;
    line-height: 1.08;
    font-size: clamp(32px, 4vw, 52px);
}

.auth-subtitle,
.panel-head p,
.register-side-card p,
.notice-card li,
.field span,
.content-header p,
.info-meta,
.empty-state p {
    color: var(--muted);
}

.notice-card {
    margin-top: 24px;
    padding: 24px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(255, 255, 255, 0.85));
    border: 1px solid rgba(15, 118, 110, 0.14);
}

.notice-card h2,
.panel-head h2,
.content-header h2 {
    margin: 0 0 10px;
}

.notice-card ul {
    margin: 0;
    padding-left: 18px;
    display: grid;
    gap: 10px;
}

.panel-head {
    margin-bottom: 24px;
}

/* ========== 表单 ========== */
.form-grid {
    display: grid;
    gap: 18px;
}

.single-column {
    grid-template-columns: 1fr;
}

.two-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
    display: grid;
    gap: 10px;
}

.field span {
    font-size: 14px;
    font-weight: 700;
}

.field input,
.field select {
    width: 100%;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 10px 16px;
    outline: none;
}

select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url('data:image/svg+xml;charset=US-ASCII,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24"><path fill="%236b7280" d="M7 10l5 5 5-5z"/></svg>');
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
}

select[name="college"] option {
    padding: 6px 16px;
    line-height: 1.3;
}

select[name="college"] option[value=""] {
    color: var(--muted);
    display: none;
}

select[name="college"]:invalid {
    color: var(--muted);
}

select[name="college"]:valid {
    color: var(--text);
}

.form-actions {
    display: flex;
    gap: 14px;
    align-items: center;
}

.form-actions.stacked {
    flex-direction: column;
}

.full-row {
    grid-column: 1 / -1;
}

.primary-btn,
.ghost-btn,
.nav-item,
.tab-item,
.action-btn {
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.primary-btn,
.ghost-btn {
    min-height: 48px;
    padding: 0 22px;
    border-radius: 16px;
    font-weight: 700;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
}

.ghost-btn {
    background: rgba(255, 255, 255, 0.8);
    color: var(--text);
    border: 1px solid var(--line);
}

.small {
    min-height: 40px;
    padding: 0 16px;
}

.form-message {
    min-height: 22px;
    margin: 0;
    font-size: 14px;
}

.form-message.success {
    color: var(--success);
}

.form-message.error {
    color: var(--danger);
}

/* ========== 应用布局 ========== */
.app-body {
    padding: 24px;
}

.app-layout {
    display: grid;
    gap: 18px;
}

.topbar {
    padding: 22px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar h1 {
    margin: 10px 0 0;
    font-size: 30px;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
}

.main-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 18px;
    align-items: start;
}

.sidebar {
    padding: 18px;
    display: grid;
    gap: 10px;
    align-content: start;
    min-height: 720px;
    background: linear-gradient(180deg, #23364d 0%, #32465f 100%);
}

.nav-item {
    width: 100%;
    text-align: left;
    padding: 16px 18px;
    border-radius: 18px;
    background: transparent;
    color: rgba(255, 255, 255, 0.86);
    font-weight: 700;
    border: 1px solid transparent;
}

.nav-item.active {
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.16);
}

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

.content-area {
    display: grid;
    gap: 18px;
    align-content: start;
    align-items: start;
}

.content-card {
    align-self: start;
    height: auto;
}

.content-header,
.section-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.content-tabs {
    display: flex;
    gap: 10px;
}

.tab-item {
    min-width: 110px;
    padding: 12px 18px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--text);
    font-weight: 700;
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.tab-item.active {
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.14), rgba(20, 184, 166, 0.24));
    color: #115e59;
    border-color: rgba(15, 118, 110, 0.18);
}

.profile-grid,
.summary-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.summary-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-bottom: 22px;
    align-items: start;
}

.info-card,
.summary-card {
    padding: 18px;
    border-radius: 20px;
    background: rgba(248, 250, 252, 0.96);
    border: 1px solid rgba(226, 232, 240, 0.9);
    height: auto;
    align-self: start;
}

.summary-card strong,
.info-card strong {
    display: block;
    margin-bottom: 8px;
}

.summary-card p,
.info-card p {
    margin: 0;
    font-size: 16px;
}

.section-block+.section-block {
    margin-top: 28px;
}

.section-head {
    margin-bottom: 18px;
}

/* ========== 通用数据表格 ========== */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: 14px;
    overflow: hidden;
    background: #fff;
    font-size: 13px;
    min-width: 700px;
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.06);
}

.data-table thead {
    background: linear-gradient(135deg, #0f766e, #14b8a6);
    color: #fff;
}

.data-table thead th {
    padding: 14px 12px;
    text-align: center;
    font-weight: 700;
    font-size: 13px;
    white-space: nowrap;
    border-right: 1px solid rgba(255, 255, 255, 0.15);
    letter-spacing: 0.5px;
}

.data-table thead th:last-child {
    border-right: none;
}

.data-table tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid #e2e8f0;
    vertical-align: middle;
    white-space: nowrap;
}

.data-table tbody tr:nth-child(even) {
    background: #f8fafc;
}

.data-table tbody tr:nth-child(odd) {
    background: #ffffff;
}

.data-table tbody tr:hover {
    background: #e6f7f5;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table .actions-cell {
    white-space: nowrap;
    text-align: center;
    min-width: 200px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    align-items: center;
    padding: 10px 6px !important;
}

/* ========== 状态标签 ========== */
.status-active {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    background: #d1fae5;
    color: #065f46;
    font-size: 12px;
    font-weight: 700;
}

.status-disabled {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    background: #fee2e2;
    color: #991b1b;
    font-size: 12px;
    font-weight: 700;
}

/* ========== 按钮样式 ========== */
.action-btn {
    padding: 8px 14px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 700;
    font-size: 12px;
    white-space: nowrap;
    transition: all 0.2s ease;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
}

.action-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(15, 118, 110, 0.25);
}

.action-btn[disabled] {
    background: rgba(148, 163, 184, 0.6);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.action-btn.small-btn {
    padding: 7px 14px;
    font-size: 12px;
    border-radius: 8px;
    min-width: 56px;
    text-align: center;
}

.action-btn.cancel-btn {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.action-btn.register-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
}

.action-btn.danger-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.edit-user-btn {
    background: linear-gradient(135deg, #3b82f6, #2563eb) !important;
}

.reset-password-btn {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed) !important;
}

.disable-user-btn {
    background: linear-gradient(135deg, #f59e0b, #d97706) !important;
}

.enable-user-btn {
    background: linear-gradient(135deg, #10b981, #059669) !important;
}

.delete-user-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
}

.edit-event-btn {
    background: linear-gradient(135deg, #3b82f6, #2563eb) !important;
}

.delete-event-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
}

/* ========== 上传区域 ========== */
.upload-area {
    padding: 18px;
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.96);
    border: 1px dashed rgba(148, 163, 184, 0.55);
}

.upload-hint {
    margin-bottom: 18px;
    padding: 14px 18px;
    background: #fefce8;
    border-left: 4px solid #f59e0b;
    border-radius: 10px;
    font-size: 13px;
    line-height: 1.8;
}

.upload-hint p {
    margin: 4px 0;
    color: #78350f;
}

.upload-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.upload-file-name {
    font-size: 13px;
    color: var(--muted);
}

/* ========== 空状态 ========== */
.empty-state {
    padding: 32px 20px;
    text-align: center;
    border-radius: 22px;
    background: rgba(248, 250, 252, 0.86);
    border: 1px dashed rgba(148, 163, 184, 0.45);
}

/* ========== 可折叠导航菜单 ========== */
.nav-group {
    display: grid;
    gap: 4px;
}

.nav-parent {
    width: 100%;
    text-align: left;
    padding: 14px 16px;
    border-radius: 18px;
    background: transparent;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 700;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-parent:hover,
.nav-parent.expanded {
    background: rgba(255, 255, 255, 0.1);
}

.nav-arrow {
    display: inline-block;
    font-size: 10px;
    transition: transform 0.2s ease;
}

.nav-parent.expanded .nav-arrow {
    transform: rotate(90deg);
}

.nav-children {
    display: none;
    padding-left: 12px;
    margin: 2px 0 6px;
    border-left: 2px solid rgba(255, 255, 255, 0.15);
}

.nav-children.open {
    display: grid;
    gap: 4px;
}

.nav-sub {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid transparent;
    padding: 12px 16px;
    font-size: 14px;
}

.nav-sub:hover {
    background: rgba(255, 255, 255, 0.12);
}

.nav-sub.active {
    background: rgba(255, 255, 255, 0.14);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.2);
}

/* ========== 分页 ========== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.page-btn {
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.95);
    color: var(--text);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.page-btn:hover:not(:disabled) {
    background: rgba(15, 118, 110, 0.08);
    border-color: var(--primary);
}

.page-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    border-color: transparent;
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-info {
    text-align: center;
    margin-top: 12px;
    font-size: 14px;
    color: var(--muted);
}

/* ========== 工具栏 ========== */
.toolbar-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.search-input {
    flex: 1;
    min-width: 200px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.95);
    border-radius: 16px;
    padding: 10px 16px;
    outline: none;
    font-size: 14px;
}

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
}

/* ========== 仪表盘 ========== */
.dashboard-shell {
    display: grid;
    gap: 16px;
}

.dashboard-top,
.dashboard-bottom {
    display: grid;
    gap: 16px;
}

.dashboard-top {
    grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.95fr);
}

.dashboard-bottom {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.dashboard-hero-card,
.metric-card,
.dashboard-panel,
.donut-panel {
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(226, 232, 240, 0.92);
}

.dashboard-hero-card {
    padding: 22px 24px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 20px;
    align-items: center;
    background:
        radial-gradient(circle at top right, rgba(20, 184, 166, 0.18), transparent 35%),
        linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(255, 255, 255, 0.94));
}

.dashboard-hero-card.compact {
    grid-template-columns: 1fr;
    align-items: stretch;
}

.dashboard-hero-copy {
    display: grid;
    align-content: start;
    gap: 10px;
}

.dashboard-kicker {
    margin: 0 0 8px;
    font-size: 13px;
    font-weight: 700;
    color: #0f766e;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.dashboard-hero h3 {
    margin: 0 0 8px;
    font-size: 28px;
}

.dashboard-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 6px;
}

.dashboard-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.metric-card {
    padding: 18px 20px;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

.metric-label,
.metric-hint,
.ranking-item p,
.upcoming-item p,
.timeline-content p,
.timeline-content span {
    color: var(--muted);
}

.metric-label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 12px;
}

.metric-value {
    display: block;
    font-size: 32px;
    line-height: 1;
    margin-bottom: 10px;
}

.metric-hint {
    margin: 0;
    font-size: 13px;
}

.dashboard-panel {
    padding: 20px 22px;
    min-height: 0;
}

.dashboard-stat-list,
.mini-bars,
.ranking-list,
.upcoming-list,
.timeline-list {
    display: grid;
    gap: 14px;
}

.dashboard-stat-row,
.mini-bar-text,
.ranking-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.dashboard-stat-row {
    padding: 14px 0;
    border-bottom: 1px solid rgba(226, 232, 240, 0.88);
}

.dashboard-stat-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.mini-bar-track {
    height: 10px;
    border-radius: 999px;
    overflow: hidden;
    background: rgba(226, 232, 240, 0.92);
}

.mini-bar-track span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #0f766e, #14b8a6);
}

.timeline-item,
.upcoming-item,
.ranking-item {
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.92);
    border: 1px solid rgba(226, 232, 240, 0.88);
}

.timeline-item {
    display: flex;
    gap: 14px;
    padding: 16px 18px;
}

.timeline-dot {
    width: 12px;
    min-width: 12px;
    height: 12px;
    margin-top: 6px;
    border-radius: 50%;
    background: linear-gradient(135deg, #0f766e, #14b8a6);
    box-shadow: 0 0 0 6px rgba(20, 184, 166, 0.12);
}

.timeline-content strong,
.upcoming-item strong,
.ranking-item strong {
    display: block;
}

.timeline-content p,
.timeline-content span,
.upcoming-item p,
.upcoming-item span,
.ranking-item p,
.ranking-meta {
    margin: 6px 0 0;
    font-size: 13px;
}

.upcoming-item,
.ranking-item {
    padding: 16px 18px;
}

.ranking-index {
    font-size: 12px;
    font-weight: 700;
    color: #0f766e;
}

.dashboard-empty {
    padding: 26px 18px;
    border-radius: 18px;
    text-align: center;
    color: var(--muted);
    background: rgba(248, 250, 252, 0.86);
    border: 1px dashed rgba(148, 163, 184, 0.45);
}

.donut-layout {
    display: grid;
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 16px;
    align-items: center;
}

.donut-chart {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.donut-hole {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.96);
    display: grid;
    place-items: center;
    text-align: center;
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.08);
}

.donut-hole strong {
    font-size: 26px;
    line-height: 1;
}

.donut-hole span {
    font-size: 12px;
    color: var(--muted);
}

.donut-legend {
    display: grid;
    gap: 10px;
}

.donut-legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.donut-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex: 0 0 12px;
}

.donut-legend-text strong {
    display: block;
    font-size: 14px;
}

.donut-legend-text p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 12px;
}

.category-overview-list {
    display: grid;
    gap: 14px;
}

.category-overview-item {
    display: grid;
    gap: 8px;
}

.category-overview-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.category-overview-head strong {
    font-size: 14px;
}

.category-overview-head span {
    color: var(--muted);
    font-size: 12px;
    white-space: nowrap;
}

.category-overview-track {
    height: 12px;
    border-radius: 999px;
    overflow: hidden;
    background: rgba(226, 232, 240, 0.92);
}

.category-overview-fill {
    display: block;
    height: 100%;
    border-radius: inherit;
}

.category-overview-fill.fill-0 {
    background: linear-gradient(90deg, #0f766e, #14b8a6);
}

.category-overview-fill.fill-1 {
    background: linear-gradient(90deg, #2563eb, #60a5fa);
}

.category-overview-fill.fill-2 {
    background: linear-gradient(90deg, #f97316, #fb923c);
}

.category-overview-fill.fill-3 {
    background: linear-gradient(90deg, #e11d48, #fb7185);
}

.category-overview-fill.fill-4 {
    background: linear-gradient(90deg, #8b5cf6, #a78bfa);
}

.compact-ranking-list,
.compact-feed-list {
    display: grid;
    gap: 12px;
}

.compact-ranking-item,
.compact-feed-item {
    display: grid;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(248, 250, 252, 0.92);
    border: 1px solid rgba(226, 232, 240, 0.88);
}

.compact-ranking-item {
    grid-template-columns: 34px minmax(0, 1fr) auto;
}

.compact-rank-no {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #0f766e, #14b8a6);
    color: #fff;
    font-weight: 700;
}

.compact-ranking-main strong,
.compact-feed-body strong {
    display: block;
}

.compact-ranking-main p,
.compact-feed-body p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.compact-rank-badge,
.compact-feed-tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 28px;
    padding: 0 10px;
    border-radius: 999px;
    background: rgba(15, 118, 110, 0.12);
    color: #0f766e;
    font-size: 12px;
    font-weight: 700;
}

.compact-feed-item {
    grid-template-columns: auto minmax(0, 1fr) auto;
}

.compact-feed-time {
    color: var(--muted);
    font-size: 12px;
    white-space: nowrap;
}

/* ========== 记住账号 ========== */
.remember-inline {
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
}

/* ========== 验证码 ========== */
.captcha-row {
    display: grid;
    grid-template-columns: 1fr 140px auto;
    gap: 12px;
    align-items: center;
}

.captcha-row input {
    min-width: 0;
}

.captcha-row canvas {
    border-radius: 14px;
    border: 1px solid var(--line);
    cursor: pointer;
    background: #fff;
}

/* ========== 响应式 ========== */
@media (max-width: 960px) {
    .login-shell,
    .register-shell,
    .main-layout,
    .profile-grid,
    .summary-grid,
    .dashboard-top,
    .dashboard-bottom,
    .dashboard-metrics,
    .two-columns {
        grid-template-columns: 1fr;
    }

    .topbar,
    .dashboard-hero-card,
    .content-header,
    .section-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

    .dashboard-hero-card {
        grid-template-columns: 1fr;
    }

    .donut-layout {
        grid-template-columns: 1fr;
        justify-items: center;
    }
}

@media (max-width: 720px) {
    .captcha-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    body,
    .app-body {
        padding: 14px;
    }

    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .data-table {
        min-width: auto;
    }

    .dashboard-hero,
    .dashboard-panel,
    .dashboard-hero-card,
    .metric-card,
    .donut-panel {
        padding: 18px;
    }

    .compact-ranking-item,
    .compact-feed-item {
        grid-template-columns: 1fr;
        align-items: start;
    }
}