/* ShowAI 简约风 —— 浅色 / 大量留白 / 单一强调色 */

:root, [data-theme="light"] {
    --bg: #fafaf9;
    --surface: #fff;
    --text: #1a1a1a;
    --text-2: #525252;
    --text-3: #a3a3a3;
    --border: #f0f0f0;
    --border-2: #e5e5e5;
    --primary: #1a1a1a;
    --primary-text: #fff;
    --primary-hover: #333;
    --link: #1a1a1a;
    --link-hover: #6366f1;
    --code-bg: #f5f5f4;
    --row-hover: #fafaf9;
}
[data-theme="dark"] {
    --bg: #0a0a0a;
    --surface: #141414;
    --text: #f5f5f4;
    --text-2: #a3a3a3;
    --text-3: #737373;
    --border: #262626;
    --border-2: #404040;
    --primary: #f5f5f4;
    --primary-text: #0a0a0a;
    --primary-hover: #e5e5e5;
    --link: #f5f5f4;
    --link-hover: #818cf8;
    --code-bg: #1a1a1a;
    --row-hover: #1a1a1a;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    font-size: 15px;
    transition: background .2s, color .2s;
}
a { color: var(--text); text-decoration: none; transition: color .15s; }
a:hover { color: #6366f1; }
img, svg { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; padding: 0; }

/* ===== 通用 ===== */
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 9px 18px; background: var(--surface); color: var(--text);
    border: 1px solid var(--border-2); border-radius: 8px;
    transition: all .15s; font-size: 14px; font-weight: 500;
}
.btn:hover { background: var(--code-bg); border-color: var(--border-2); }
.btn-primary {
    background: var(--primary); color: var(--primary-text); border-color: var(--text);
}
.btn-primary:hover { background: var(--primary-hover); color: var(--primary-text); }
.btn-danger { color: #dc2626; border-color: #fecaca; background: #fef2f2; }
.btn-danger:hover { background: #fee2e2; }
.btn-success { color: #059669; border-color: #a7f3d0; background: #f0fdf4; }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

input[type=text], input[type=password], input[type=email], input[type=number],
input[type=url], input[type=file], select, textarea {
    width: 100%; padding: 10px 12px;
    background: var(--surface); color: var(--text);
    border: 1px solid var(--border-2); border-radius: 8px;
    transition: border-color .15s, box-shadow .15s;
}
input:focus, textarea:focus, select:focus {
    outline: none; border-color: var(--text);
    box-shadow: 0 0 0 3px rgba(26, 26, 26, .08);
}
textarea { resize: vertical; min-height: 80px; }
label { display: block; margin-bottom: 6px; color: var(--text-2); font-size: 13px; font-weight: 500; }
.form-group { margin-bottom: 18px; }
.help { color: var(--text-3); font-size: 12px; margin-top: 4px; }
.form-row { display: flex; gap: 12px; }
.form-row > * { flex: 1; }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
}
.card-title {
    margin: 0 0 16px; font-size: 16px; font-weight: 600; color: var(--text);
    display: flex; align-items: center; gap: 8px;
}
.muted { color: var(--text-3); }
.hr { height: 1px; background: var(--border); margin: 24px 0; border: 0; }

table.tbl { width: 100%; border-collapse: collapse; }
table.tbl th, table.tbl td {
    padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px;
}
table.tbl th { color: var(--text-2); font-weight: 500; background: var(--bg); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
table.tbl tr:last-child td { border-bottom: 0; }
table.tbl tr:hover td { background: var(--bg); }

.badge {
    display: inline-block; padding: 2px 10px; border-radius: 12px;
    font-size: 12px; line-height: 1.6; background: var(--code-bg); color: var(--text-2);
    font-weight: 500;
}
.badge-ok { background: #ecfdf5; color: #047857; }
.badge-err { background: #fef2f2; color: #b91c1c; }
.badge-warn { background: #fffbeb; color: #b45309; }
.badge-info { background: #eff6ff; color: #1d4ed8; }

.flash {
    padding: 12px 16px; border-radius: 8px; margin-bottom: 16px;
    border: 1px solid; font-size: 14px;
}
.flash-ok { background: #f0fdf4; border-color: #bbf7d0; color: #166534; }
.flash-error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }

/* ===== 顶部导航 ===== */
.topbar {
    position: sticky; top: 0; z-index: 50;
    background: rgba(250, 250, 249, .85); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}
.topbar-inner {
    display: flex; align-items: center; gap: 24px;
    padding: 14px 24px; max-width: 1200px; margin: 0 auto;
}
.brand {
    display: flex; align-items: center; gap: 8px;
    font-weight: 700; font-size: 17px; color: var(--text);
    letter-spacing: -0.01em;
}
.brand svg { width: 24px; height: 24px; }
.brand-text { color: var(--text); }
.brand-sub { color: var(--text-3); font-size: 13px; font-weight: 400; margin-left: 4px; }

.nav { display: flex; gap: 4px; flex: 1; }
.nav a {
    padding: 6px 12px; border-radius: 6px; color: var(--text-2); font-size: 14px;
    font-weight: 500;
}
.nav a:hover { background: var(--code-bg); color: var(--text); }
.nav a.active { background: var(--primary); color: var(--primary-text); }

.user-box { display: flex; align-items: center; gap: 8px; }
.user-points {
    background: var(--code-bg); border-radius: 16px;
    padding: 5px 14px; font-size: 13px; color: var(--text);
    display: inline-flex; align-items: center; gap: 5px;
    font-weight: 500;
}
.user-points svg { width: 14px; height: 14px; }

/* 移动端汉堡菜单 */
.menu-toggle {
    display: none;
    width: 36px; height: 36px;
    border: 1px solid var(--border-2); border-radius: 8px;
    background: var(--surface); align-items: center; justify-content: center;
}
.menu-toggle svg { width: 18px; height: 18px; color: var(--text); }

/* 主题切换按钮 */
.theme-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px;
    border: 1px solid var(--border-2); border-radius: 8px;
    background: var(--surface); color: var(--text);
    text-decoration: none; transition: all .15s;
}
.theme-toggle:hover { background: var(--code-bg); }
.theme-toggle svg { width: 16px; height: 16px; }

/* /account 标签页 */
.account-tabs {
    display: flex; gap: 4px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px; flex-wrap: wrap;
}
.tab-btn {
    padding: 10px 18px; border: 0; background: transparent;
    color: var(--text-2); font-size: 14px; cursor: pointer;
    border-bottom: 2px solid transparent;
    display: inline-flex; align-items: center; gap: 6px;
    transition: all .15s; margin-bottom: -1px;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--text); border-bottom-color: var(--text); }
.tab-btn svg { width: 14px; height: 14px; }
.overview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px 24px;
}
.ov-label { font-size: 12px; color: var(--text-3); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 4px; }
.ov-value { font-size: 16px; color: var(--text); font-weight: 500; }
@media (max-width: 768px) {
    .overview-grid { grid-template-columns: repeat(2, 1fr); gap: 14px 16px; }
    .account-tabs { overflow-x: auto; flex-wrap: nowrap; }
    .tab-btn { white-space: nowrap; padding: 10px 14px; }
}
@media (max-width: 480px) {
    .overview-grid { grid-template-columns: 1fr; }
}

/* ===== 公告 ===== */
.announcement-bar {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    color: var(--text-2); font-size: 13px;
}
.announcement-inner {
    max-width: 1080px; margin: 0 auto;
    padding: 8px 24px; display: flex; align-items: center; gap: 8px;
}

/* ===== 页面容器 ===== */
.page { max-width: 1080px; margin: 0 auto; padding: 32px 24px 80px; }
.page-title { font-size: 26px; font-weight: 700; margin: 0 0 6px; color: var(--text); letter-spacing: -0.02em; }
.page-sub { color: var(--text-2); margin: 0 0 24px; font-size: 15px; }

/* ===== 首页 hero ===== */
.hero {
    text-align: center; padding: 80px 24px 60px;
    max-width: 760px; margin: 0 auto;
}
.hero h1 {
    font-size: 44px; font-weight: 800; margin: 0 0 16px;
    color: var(--text);
    line-height: 1.15; letter-spacing: -0.03em;
}
.hero p { color: var(--text-2); font-size: 17px; margin: 0 0 32px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.features {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px; margin: 40px 0;
}
.feature {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 24px; transition: all .2s;
    display: block;
}
.feature:hover { border-color: var(--border-2); transform: translateY(-2px); }
.feature-icon {
    width: 40px; height: 40px; border-radius: 10px;
    background: var(--primary);
    display: inline-flex; align-items: center; justify-content: center;
    margin-bottom: 12px;
}
.feature-icon svg { width: 22px; height: 22px; color: var(--primary-text); }
.feature h3 { margin: 0 0 6px; font-size: 15px; font-weight: 600; }
.feature p { color: var(--text-2); font-size: 13px; margin: 0; line-height: 1.5; }

/* ===== 通用网格 ===== */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ===== 对话 ===== */
.chat-wrap { display: flex; gap: 16px; height: calc(100vh - 220px); min-height: 500px; }
.chat-sessions {
    width: 220px; flex-shrink: 0; background: var(--surface); border: 1px solid var(--border);
    border-radius: 12px; padding: 12px; overflow-y: auto;
}
.chat-sessions h4 { margin: 0 0 8px; font-size: 12px; color: var(--text-3); font-weight: 500; text-transform: uppercase; letter-spacing: .04em; }
.chat-sessions a {
    display: block; padding: 8px 10px; border-radius: 6px; color: var(--text-2); font-size: 13px;
    margin-bottom: 2px;
}
.chat-sessions a:hover, .chat-sessions a.active { background: var(--code-bg); color: var(--text); }
.sessions-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 4px; }
.sessions-head h4 { margin: 0; }
.sessions-head .new-session {
    display: inline-flex; align-items: center; justify-content: center;
    width: 24px; height: 24px; padding: 0; border-radius: 4px; font-size: 16px;
    text-decoration: none; color: var(--text-2); border: 1px solid var(--border-2); background: var(--surface);
}
.sessions-head .new-session:hover { background: var(--code-bg); color: var(--text); }
.session-item {
    display: flex; align-items: center; gap: 4px;
    padding: 4px 6px; border-radius: 6px; margin-bottom: 2px;
    border: 1px solid transparent;
}
.session-item:hover { background: var(--code-bg); }
.session-item.active { background: var(--code-bg); border-color: var(--border-2); }
.session-item .session-link {
    flex: 1; display: block; padding: 0; margin: 0; color: var(--text-2);
    text-decoration: none; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    font-size: 13px; background: transparent !important;
}
.session-item .session-link .title { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.session-item .session-del {
    border: 0; background: transparent; cursor: pointer; color: var(--text-3);
    font-size: 14px; padding: 0 4px; line-height: 1; border-radius: 3px;
    opacity: 0; transition: opacity .15s;
}
.session-item:hover .session-del { opacity: 1; }
.session-item .session-del:hover { background: var(--border-2); color: #dc2626; }
.session-title-bar {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 14px; border-bottom: 1px solid var(--border);
    background: var(--surface);
}
.session-title-bar .session-title {
    font-size: 14px; font-weight: 600; cursor: pointer; padding: 2px 6px; border-radius: 4px;
}
.session-title-bar .session-title:hover { background: var(--code-bg); }
.session-title-bar .session-title-hint {
    font-size: 11px; color: var(--text-3); opacity: 0; transition: opacity .15s;
}
.session-title-bar:hover .session-title-hint { opacity: 1; }

.chat-main {
    flex: 1; display: flex; flex-direction: column;
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
}
.chat-messages { flex: 1; overflow-y: auto; padding: 20px; }
.chat-msg { margin-bottom: 16px; display: flex; gap: 10px; }
.chat-msg .avatar {
    width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 600;
}
.chat-msg.user .avatar { background: var(--code-bg); color: var(--text-2); }
.chat-msg.assistant .avatar { background: var(--primary); color: var(--primary-text); }
.chat-msg .bubble {
    background: var(--bg); padding: 10px 14px; border-radius: 12px; max-width: 80%;
    white-space: pre-wrap; word-break: break-word; font-size: 14px;
    border: 1px solid var(--border);
}
.chat-msg.user .bubble { background: var(--code-bg); }
.chat-msg .meta { font-size: 11px; color: var(--text-3); margin-top: 4px; }

.chat-input { border-top: 1px solid var(--border); padding: 12px; }
.chat-input-row { display: flex; gap: 8px; align-items: flex-end; }
.chat-input textarea { flex: 1; min-height: 44px; max-height: 160px; }
.chat-toolbar {
    padding: 10px 12px; border-bottom: 1px solid var(--border);
    display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
}
.chat-toolbar select { width: auto; padding: 4px 8px; font-size: 13px; }
.img-preview {
    display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px;
    padding: 8px; background: var(--code-bg); border-radius: 8px;
}
.img-preview .thumb {
    position: relative; width: 80px; height: 80px; border-radius: 6px;
    overflow: hidden; border: 1px solid var(--border);
}
.img-preview .thumb img { width: 100%; height: 100%; object-fit: cover; }
.img-preview .thumb button {
    position: absolute; top: 2px; right: 2px;
    width: 22px; height: 22px; border-radius: 50%; border: 0;
    background: rgba(0,0,0,.6); color: #fff; cursor: pointer; font-size: 14px; line-height: 1;
}
.msg-images { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 6px; }
.msg-images img { max-width: 180px; max-height: 180px; border-radius: 6px; border: 1px solid var(--border); }
.msg-text { white-space: pre-wrap; word-break: break-word; }
.msg-text p { margin: 0 0 8px; }
.msg-text p:last-child { margin-bottom: 0; }
.msg-text strong { font-weight: 700; color: var(--text); }
.msg-text em { font-style: italic; }
.msg-text code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--code-bg); padding: 1px 5px; border-radius: 3px; font-size: 13px; }
.msg-text pre { background: var(--code-bg); border: 1px solid var(--border); border-radius: 6px; padding: 10px 12px; overflow-x: auto; margin: 8px 0; }
.msg-text pre code { background: transparent; padding: 0; font-size: 13px; }
.msg-text h1, .msg-text h2, .msg-text h3, .msg-text h4 { margin: 12px 0 8px; font-weight: 600; line-height: 1.3; }
.msg-text h1 { font-size: 20px; }
.msg-text h2 { font-size: 18px; }
.msg-text h3 { font-size: 16px; }
.msg-text h4 { font-size: 15px; }
.msg-text ul, .msg-text ol { margin: 6px 0; padding-left: 22px; }
.msg-text li { margin: 2px 0; }
.msg-text a { color: var(--link-hover); text-decoration: underline; }
.msg-text blockquote { border-left: 3px solid var(--border-2); margin: 8px 0; padding: 0 12px; color: var(--text-2); }
.msg-text hr { border: 0; border-top: 1px solid var(--border); margin: 12px 0; }
.msg-text table { border-collapse: collapse; margin: 8px 0; }
.msg-text table th, .msg-text table td { border: 1px solid var(--border); padding: 4px 8px; }
.msg-text.streaming::after { content: '▍'; color: var(--text-3); animation: cursor-blink 1s infinite; }
@keyframes cursor-blink { 50% { opacity: 0; } }
.msg-actions {
    display: flex; gap: 6px; margin-top: 8px; padding-top: 6px;
    border-top: 1px dashed var(--border); opacity: 0; transition: opacity .15s;
}
.chat-msg.assistant:hover .msg-actions, .chat-msg.assistant:focus-within .msg-actions { opacity: 1; }
.msg-actions .msg-act {
    border: 1px solid var(--border-2); background: transparent; color: var(--text-2);
    font-size: 12px; padding: 3px 8px; border-radius: 4px; cursor: pointer;
}
.msg-actions .msg-act:hover { background: var(--code-bg); color: var(--text); }
.msg-text pre { position: relative; }
.msg-text .code-copy {
    position: absolute; top: 6px; right: 6px;
    border: 1px solid var(--border-2); background: var(--surface); color: var(--text-2);
    font-size: 11px; padding: 2px 8px; border-radius: 3px; cursor: pointer; opacity: 0; transition: opacity .15s;
}
.msg-text pre:hover .code-copy { opacity: 1; }
.msg-text .code-copy:hover { background: var(--code-bg); color: var(--text); }

@media (max-width: 768px) {
    .chat-wrap { flex-direction: column; height: auto; }
    .chat-sessions { width: 100%; max-height: 120px; }
}

/* ===== 图片生成 ===== */
.gen-layout { display: grid; grid-template-columns: 360px 1fr; gap: 16px; }
@media (max-width: 900px) { .gen-layout { grid-template-columns: 1fr; } }
.gen-side { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.gen-canvas {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 20px; min-height: 400px; display: flex; align-items: center; justify-content: center;
}
.gen-canvas img { max-width: 100%; max-height: 60vh; border-radius: 8px; }

.image-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px; margin-top: 16px;
}
.image-grid .item {
    background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
    overflow: hidden; cursor: pointer; transition: all .15s;
}
.image-grid .item:hover { border-color: var(--border-2); }
.image-grid .item img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.image-grid .item .prompt { padding: 10px; font-size: 12px; color: var(--text-2); line-height: 1.4;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ===== 后台 ===== */
.admin-layout { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.admin-side {
    background: var(--surface); border-right: 1px solid #f0f0f0; padding: 20px 12px;
    position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.admin-side .brand { padding: 0 8px 16px; margin-bottom: 12px; border-bottom: 1px solid var(--border); }
.admin-side a {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 12px; border-radius: 6px; color: var(--text-2); font-size: 14px;
    margin-bottom: 2px; font-weight: 500;
}
.admin-side a:hover { background: var(--code-bg); color: var(--text); }
.admin-side a.active { background: var(--primary); color: var(--primary-text); }
.admin-side a svg { width: 16px; height: 16px; }
.admin-main { padding: 32px; max-width: 100%; overflow-x: auto; }
@media (max-width: 768px) {
    .admin-layout { grid-template-columns: 1fr; }
    .admin-side { position: static; height: auto; padding: 12px; }
    .admin-side .brand { display: none; }
    .admin-main { padding: 16px; }
}

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.stat-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
    padding: 16px 20px;
}
.stat-card .label { color: var(--text-3); font-size: 12px; margin-bottom: 4px; text-transform: uppercase; letter-spacing: .04em; }
.stat-card .value { font-size: 22px; font-weight: 700; color: var(--text); }

.bar-chart { display: flex; align-items: flex-end; gap: 8px; height: 140px; padding: 12px 0; }
.bar-chart .bar { flex: 1; background: var(--primary); border-radius: 4px 4px 0 0; min-height: 4px; transition: all .3s; }
.bar-chart .bar:hover { background: var(--border-2); }
.bar-labels { display: flex; gap: 8px; }
.bar-labels span { flex: 1; text-align: center; color: var(--text-3); font-size: 11px; }

/* ===== 页脚：左对齐的「想吃猫的鱼工作室旗下」 ===== */
.footer {
    border-top: 1px solid #f0f0f0;
    padding: 32px 24px;
    margin-top: 60px;
    background: var(--surface);
}
.footer-inner {
    max-width: 1080px; margin: 0 auto;
    display: flex; flex-direction: column; align-items: flex-start; gap: 8px;
}
.footer-brand {
    font-size: 14px; color: var(--text); font-weight: 600;
    display: flex; align-items: center; gap: 6px;
}
.footer-brand svg { width: 14px; height: 14px; }
.footer-sub { font-size: 12px; color: var(--text-3); }
.friend-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 4px; }
.friend-links a { color: var(--text-2); font-size: 13px; }
.friend-links a:hover { color: var(--text); }

/* 通用工具 */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mt-2 { margin-top: 8px; } .mt-3 { margin-top: 12px; } .mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; } .mb-3 { margin-bottom: 12px; } .mb-4 { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 12px; }
.text-muted { color: var(--text-3); }
.text-ok { color: #059669; }
.text-err { color: #dc2626; }
.text-warn { color: #b45309; }
.w-full { width: 100%; }
.hidden { display: none; }

.spinner {
    display: inline-block; width: 14px; height: 14px;
    border: 2px solid #e5e5e5; border-top-color: var(--text); border-radius: 50%;
    animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 移动端响应式 ===== */
@media (max-width: 768px) {
    .container, .page { padding-left: 16px; padding-right: 16px; }
    .hero { padding: 48px 16px 32px; }
    .hero h1 { font-size: 30px; }
    .hero p { font-size: 15px; }
    .topbar-inner { flex-wrap: wrap; padding: 12px 16px; gap: 12px; }
    .nav { order: 4; width: 100%; overflow-x: auto; padding: 8px 0 0; gap: 2px; }
    .nav a { white-space: nowrap; font-size: 13px; padding: 6px 10px; }
    .user-box { gap: 6px; }
    .user-box .btn-sm { padding: 4px 10px; }
    .brand-sub { display: none; }
    .menu-toggle { display: inline-flex; }
    .nav.collapsed { display: none; }
    .form-row { flex-direction: column; gap: 0; }
    .page-title { font-size: 22px; }
    .features { grid-template-columns: 1fr 1fr; gap: 12px; }
    .feature { padding: 16px; }
    .feature h3 { font-size: 14px; }
    .feature p { font-size: 12px; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
    .stat-card { padding: 12px 14px; }
    .stat-card .value { font-size: 18px; }
    .footer { padding: 24px 16px; }
    .footer-inner { gap: 6px; }
    .image-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
    .card { padding: 16px; }
    .admin-side a { font-size: 13px; padding: 6px 10px; }
    table.tbl th, table.tbl td { padding: 8px 10px; font-size: 13px; }
}

@media (max-width: 480px) {
    .features { grid-template-columns: 1fr; }
    .stat-grid { grid-template-columns: 1fr; }
    .image-grid { grid-template-columns: 1fr; }
}