*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #1a1a1f;
    --surface: #242428;
    --surface-hover: #2a2a2f;
    --border: #3a3a40;
    --border-focus: #c8956c;
    --text: #e8e6e3;
    --text-dim: #8a8a8f;
    --accent: #c8956c;
    --accent-dim: rgba(200, 149, 108, 0.15);
    --result-bg: #1e2a1e;
    --result-border: #4a6a4a;
    --result-text: #7dcea0;
    --tag-alt: #6c8fc8;
    --card-radius: 8px;
    --card-shadow: none;
    --card-border: 1px solid var(--border);
    --body-grad: radial-gradient(1200px 800px at 70% -10%, transparent, transparent);
    --toggle-knob: #fff;
}

/* ===== 亮色主题 ===== */
body[data-theme="light"] {
    --bg: #f4f2ee;
    --surface: #ffffff;
    --surface-hover: #efede8;
    --border: #dcd8d0;
    --border-focus: #b0784a;
    --text: #2b2b2e;
    --text-dim: #7a766f;
    --accent: #b0784a;
    --accent-dim: rgba(176, 120, 74, 0.12);
    --result-bg: #edf5ec;
    --result-border: #c2dcc0;
    --result-text: #2e7d4f;
    --tag-alt: #4f6f9f;
    --card-radius: 8px;
    --card-shadow: 0 2px 10px rgba(60, 50, 40, 0.06);
    --card-border: 1px solid var(--border);
    --toggle-knob: #6b665e;
    --body-grad: radial-gradient(1100px 700px at 70% -10%, rgba(200, 149, 108, 0.12), transparent 55%),
                 radial-gradient(900px 700px at 10% 30%, rgba(79, 111, 159, 0.08), transparent 60%);
}

body[data-theme="light"] {
    background: var(--bg);
    background-image: var(--body-grad);
    background-attachment: fixed;
    transition: background 0.6s ease;
}

body[data-theme="light"] .toggle-slider::after {
    box-shadow: 0 0 0 1px var(--border);
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
    transition: background 0.6s ease, color 0.4s ease;
}

.app {
    max-width: 960px;
    margin: 0 auto;
    padding: 40px 24px;
    opacity: 0;
}

/* 自动计算开关栏（左上角） */
.calc-mode-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 10px;
}

.top-hint {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 20px;
    padding-left: 2px;
}

/* 公告条 */
.notice-bar {
    background: var(--accent-dim);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 14px;
    margin-bottom: 20px;
}

.notice-item {
    font-size: 0.82rem;
    color: var(--text);
    display: flex;
    align-items: baseline;
    gap: 8px;
    flex-wrap: wrap;
    padding: 3px 0;
}

.notice-tag {
    font-size: 0.7rem;
    background: var(--accent);
    color: var(--bg);
    padding: 1px 8px;
    border-radius: 3px;
    font-weight: 500;
}

.notice-content {
    color: var(--text-dim);
}

.notice-date {
    color: var(--text-dim);
    font-size: 0.72rem;
    margin-left: auto;
}

.calc-mode-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.calc-mode-toggle input {
    display: none;
}

.toggle-slider {
    width: 40px;
    height: 20px;
    background: var(--border);
    border-radius: 10px;
    position: relative;
    transition: background 0.25s;
    flex-shrink: 0;
}

.toggle-slider::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    background: var(--toggle-knob, #fff);
    border-radius: 50%;
    transition: transform 0.25s;
}

.calc-mode-toggle input:checked + .toggle-slider {
    background: var(--accent);
}

.calc-mode-toggle input:checked + .toggle-slider::after {
    transform: translateX(20px);
}

.toggle-label {
    font-size: 0.88rem;
    color: var(--text-dim);
}

.calc-run-btn {
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 500;
}

.calc-run-btn:hover {
    background: var(--accent);
    color: var(--bg);
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 48px;
}

.logo-wrap {
    margin-bottom: 20px;
}

.logo {
    height: 72px;
    width: auto;
}

.title {
    font-size: 1.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-dim);
    font-weight: 300;
    letter-spacing: 0.04em;
}

/* Tabs */
.tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 36px;
}

.tab {
    padding: 10px 28px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-dim);
    font-size: 0.95rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.25s;
}

.tab:hover {
    border-color: var(--accent);
    color: var(--text);
}

.tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* MPP mode buttons */
.mpp-mode {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 28px;
}

.mode-btn {
    padding: 8px 20px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-dim);
    font-size: 0.88rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.25s;
}

.mode-btn:hover {
    border-color: var(--tag-alt);
    color: var(--text);
}

.mode-btn.active {
    background: rgba(108, 143, 200, 0.15);
    border-color: var(--tag-alt);
    color: var(--tag-alt);
}

.hidden {
    display: none !important;
}

/* Ratio Section */
.ratio-section {
    margin-bottom: 36px;
}

.ratio-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    flex-wrap: wrap;
}

.ratio-label {
    font-size: 0.9rem;
    color: var(--text-dim);
    font-weight: 400;
}

.ratio-input {
    width: 72px;
    padding: 8px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
    text-align: center;
    transition: border-color 0.2s;
}

.ratio-input:focus {
    outline: none;
    border-color: var(--accent);
}

.ratio-btn {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-dim);
    font-size: 0.85rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
}

.ratio-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.ratio-btn.active {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
}

.ratio-hint {
    font-size: 0.8rem;
    color: var(--text-dim);
    opacity: 0.6;
}

/* Calculators Grid */
.calculators {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

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

/* Card */
.calc-card {
    background: var(--surface);
    border: var(--card-border, 1px solid var(--border));
    border-radius: var(--card-radius, 6px);
    overflow: hidden;
    box-shadow: var(--card-shadow, none);
}

.card-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.card-tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 3px 10px;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 3px;
    letter-spacing: 0.04em;
}

.card-tag.tag-alt {
    background: rgba(108, 143, 200, 0.15);
    color: var(--tag-alt);
}

.card-title {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-dim);
}

.card-body {
    padding: 20px 24px 24px;
}

/* Fields */
.field {
    margin-bottom: 16px;
}

.field:last-of-type {
    margin-bottom: 0;
}

.field label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 6px;
    font-weight: 400;
}

.field .unit {
    font-size: 0.75rem;
    opacity: 0.5;
    margin-left: 2px;
}

.field-input {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.25s, box-shadow 0.25s;
}

.field-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(200, 149, 108, 0.1);
}

.field-input::placeholder {
    color: var(--text-dim);
    opacity: 0.3;
}

.calc-run-btn {
    margin-top: 14px;
    width: 100%;
    padding: 12px;
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 6px;
    letter-spacing: 0.06em;
    transition: all 0.25s;
}

.calc-run-btn:hover {
    background: var(--accent);
    color: var(--bg);
    box-shadow: 0 4px 18px var(--accent-dim);
    transform: translateY(-1px);
}

/* 主题切换按钮 */
.theme-btn {
    margin-left: auto;
    font-size: 0.85rem;
}

.theme-btn.active {
    border-color: var(--accent);
    background: var(--accent-dim);
    color: var(--accent);
}

/* Result */
.result-area {
    margin-top: 24px;
    padding: 16px 18px;
    background: var(--result-bg);
    border: 1px solid var(--result-border);
    border-radius: 4px;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.result-label {
    font-size: 0.85rem;
    color: var(--result-text);
    opacity: 0.7;
}

.result-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--result-text);
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
    min-width: 80px;
}

.result-unit {
    font-size: 0.85rem;
    color: var(--result-text);
    opacity: 0.5;
}

/* Footer */
.footer {
    margin-top: 40px;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-dim);
    opacity: 0.4;
}

/* Selection */
::selection {
    background: var(--accent);
    color: var(--bg);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-dim);
}
/* 品牌区 */
/* 首屏广告层（可关闭） */
.landing-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(2px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
}

.landing-overlay.open {
    display: flex;
}

.landing-box {
    position: relative;
    width: min(92vw, 400px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 34px 26px 26px;
    text-align: center;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

.landing-close {
    position: absolute;
    top: 10px;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.2rem;
    cursor: pointer;
    font-family: inherit;
}

.landing-close:hover {
    color: var(--text);
}

.landing-logo {
    height: 58px;
    width: auto;
    margin-bottom: 12px;
}

.landing-badge {
    display: inline-block;
    padding: 4px 14px;
    margin-bottom: 12px;
    border: 1px solid var(--accent);
    border-radius: 999px;
    font-size: 0.75rem;
    color: var(--accent);
    letter-spacing: 0.16em;
}

.landing-title {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
    letter-spacing: 0.04em;
}

.landing-sub {
    font-size: 0.88rem;
    color: var(--text-dim);
    line-height: 1.7;
    margin-bottom: 14px;
}

.landing-points {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--accent);
    margin-bottom: 20px;
}

.landing-hint {
    display: block;
    margin-top: 10px;
    font-size: 0.72rem;
    color: var(--text-dim);
}

.brand-cta {
    padding: 12px 46px;
    border: none;
    border-radius: 999px;
    background: linear-gradient(135deg, #c8956c, #a06a3a);
    color: #fff;
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    cursor: pointer;
    font-family: inherit;
    box-shadow: 0 4px 14px rgba(200, 149, 108, 0.35);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.brand-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(200, 149, 108, 0.45);
}

.brand-cta:active {
    transform: translateY(0);
}

@keyframes card-flash {
    0%, 100% { box-shadow: none; }
    50% { box-shadow: 0 0 0 4px rgba(200, 149, 108, 0.5); }
}

.flash-focus {
    animation: card-flash 0.9s ease 2;
}

/* 材料比重选择 */
.material-sel {
    padding: 8px 10px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
}

.material-sel option {
    background: var(--bg);
    color: var(--text);
}

/* 结果复制按钮 */
.copy-btn {
    margin-left: auto;
    padding: 5px 12px;
    font-size: 0.75rem;
    border: 1px solid var(--result-border);
    border-radius: 4px;
    background: transparent;
    color: var(--result-text);
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
    white-space: nowrap;
}

.copy-btn:hover {
    background: var(--result-border);
    color: var(--bg);
}

/* 页脚链接 */
.footer-links {
    margin-top: 6px;
}

.footer-links a {
    color: var(--text-dim);
    text-decoration: none;
    cursor: pointer;
}

.footer-links a:hover {
    color: var(--accent);
}

/* ===== 头部操作按钮 ===== */
.header-actions {
    margin-top: 22px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.header-group {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    max-width: 100%;
}

.header-group-account {
    gap: 8px;
}

.header-group-account .action-btn {
    font-size: 0.82rem;
    padding: 8px 14px;
}

.header-group-account {
    position: relative;
    padding-top: 12px;
}

.header-group-account::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 240px;
    max-width: 80%;
    height: 1px;
    background: var(--border);
    opacity: 0.6;
}

.action-btn {
    padding: 9px 20px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-size: 0.88rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
}

.action-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.action-btn.pro-btn {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg);
    font-weight: 500;
}

.action-btn.danger {
    border-color: #b35;
    color: #d77;
}

.action-btn.logout {
    border-color: #b35;
    color: #d77;
}

.action-btn.admin-entry {
    border-color: var(--accent);
    background: var(--accent-dim);
    color: var(--accent);
    font-weight: 500;
}

.action-btn.admin-exit {
    border-color: #b35;
    color: #d77;
    font-size: 0.8rem;
    padding: 9px 12px;
}

.action-btn.admin-exit:hover {
    background: #b35;
    color: #fff;
}

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

.usage-badge {
    margin-left: 8px;
    font-size: 0.78rem;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 2px 10px;
    border-radius: 3px;
}

.usage-badge.pro {
    color: var(--result-text);
    background: rgba(125, 206, 160, 0.12);
}

.user-badge {
    font-size: 0.8rem;
    color: var(--text-dim);
    padding: 4px 10px;
    border: 1px dashed var(--border);
    border-radius: 4px;
}

.pro-spec-opt {
    color: #d9a066;
}

.plan-badge {
    font-size: 0.7rem;
    font-weight: 400;
    padding: 2px 10px;
    background: var(--border);
    border-radius: 3px;
    vertical-align: middle;
    margin-left: 8px;
    color: var(--text-dim);
}

.plan-badge.pro {
    background: var(--accent);
    color: var(--bg);
}

/* ===== 规格下拉 ===== */
.spec-select {
    appearance: auto;
    cursor: pointer;
}

.spec-select option {
    background: var(--bg);
    color: var(--text);
}

.spec-row {
    display: flex;
    gap: 8px;
}

.spec-row .spec-select {
    flex: 1;
}

.fav-btn {
    padding: 7px 12px;
    font-size: 0.8rem;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-dim);
    border-radius: 4px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
    font-family: inherit;
}

.fav-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* 升级对比表 */
.upgrade-compare {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    margin-top: 14px;
}

.compare-head {
    padding: 8px 14px;
    background: var(--surface-hover);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-dim);
}

.compare-row {
    display: flex;
    align-items: center;
    padding: 7px 14px;
    font-size: 0.82rem;
    border-top: 1px solid var(--border);
    gap: 8px;
}

.compare-row span {
    flex: 1;
    color: var(--text-dim);
}

.compare-row em {
    font-style: normal;
    font-weight: 500;
    min-width: 74px;
    text-align: center;
    padding: 2px 8px;
    border-radius: 3px;
    font-variant-numeric: tabular-nums;
}

.compare-row em.free {
    color: var(--text-dim);
    background: var(--bg);
    border: 1px solid var(--border);
}

.compare-row em.pro {
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid var(--accent);
}

/* 价格档案 */
.price-chart {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    margin-bottom: 8px;
}

.price-chart-title {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.price-chart-meta {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 6px;
}

/* ===== 登录弹窗 ===== */
.auth-modal {
    max-width: 420px;
}

.auth-tip {
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.auth-field {
    margin-bottom: 14px;
}

.auth-field label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 6px;
}

.auth-field .field-input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-size: 0.95rem;
}

.auth-field .field-input:focus {
    outline: none;
    border-color: var(--border-focus);
}

.auth-switch {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.auth-switch a {
    color: var(--accent);
    text-decoration: none;
}

.code-row {
    display: flex;
    gap: 8px;
}

.code-row .field-input {
    flex: 1;
}

.code-row .action-btn {
    white-space: nowrap;
    padding: 10px 14px;
}

/* 联系管理员 */
.msg-input {
    resize: vertical;
    min-height: 80px;
    margin-bottom: 10px;
}

.msg-send-btn {
    width: 100%;
    margin-bottom: 14px;
}

.msg-list {
    max-height: 300px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.msg-item {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.88rem;
    line-height: 1.5;
    background: var(--bg);
    border: 1px solid var(--border);
}

.msg-item.reply {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.msg-tag {
    font-size: 0.72rem;
    color: var(--accent);
    margin-right: 8px;
    font-weight: 500;
}

.msg-time {
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-top: 4px;
}

/* 批量计算 */
.batch-modal {
    max-width: 640px;
}

.batch-tip {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 10px;
    line-height: 1.6;
}

.batch-tip code {
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: 3px;
    color: var(--accent);
}

.batch-input {
    resize: vertical;
    font-family: 'Consolas', monospace;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.batch-actions {
    margin-bottom: 14px;
}

.batch-actions .action-btn {
    width: 100%;
    padding: 11px;
}

.batch-err {
    color: #d77;
    font-size: 0.85rem;
    margin-bottom: 10px;
}

.batch-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.batch-table th, .batch-table td {
    border: 1px solid var(--border);
    padding: 8px 10px;
    text-align: left;
}

.batch-table th {
    background: var(--surface-hover);
    font-weight: 500;
}

/* 个人中心 */
.profile-modal {
    max-width: 480px;
}

.profile-info {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px 16px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.profile-info p {
    display: flex;
    gap: 12px;
    padding: 4px 0;
}

.profile-label {
    color: var(--text-dim);
    width: 72px;
    flex-shrink: 0;
}

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

.profile-section h4 {
    font-size: 0.95rem;
    color: var(--text-dim);
    margin-bottom: 10px;
    font-weight: 500;
}

.profile-btn {
    width: 100%;
    padding: 10px;
}

.device-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 9px 12px;
    margin-bottom: 8px;
    font-size: 0.85rem;
}

.device-name {
    font-weight: 500;
}

.device-cur {
    color: var(--result-text);
    font-size: 0.72rem;
    border: 1px solid var(--result-border);
    padding: 1px 6px;
    border-radius: 3px;
    margin-left: 6px;
}

.device-meta {
    color: var(--text-dim);
    font-size: 0.75rem;
    margin-top: 3px;
}

.btn-sm.grant {
    border-color: var(--accent);
    color: var(--accent);
    background: transparent;
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.78rem;
}

/* 帮助弹窗 */
.help-body h4 {
    color: var(--accent);
    font-size: 0.95rem;
    margin: 14px 0 6px;
    font-weight: 500;
}

.help-body h4:first-child {
    margin-top: 0;
}

.help-body p {
    font-size: 0.88rem;
    color: var(--text-dim);
    line-height: 1.7;
}

.help-body code {
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: 3px;
    color: var(--accent);
}

/* ===== 弹窗 ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 20px;
}

.modal-overlay.open {
    display: flex;
}

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 100%;
    max-width: 520px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 1rem;
    font-weight: 500;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.4rem;
    cursor: pointer;
    line-height: 1;
}

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

.modal-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--border);
    text-align: right;
}

/* ===== 历史记录 ===== */
.history-item {
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 4px;
    margin-bottom: 10px;
}

.history-main {
    font-size: 0.95rem;
    color: var(--text);
}

.history-sub {
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 4px;
}

.empty-tip {
    color: var(--text-dim);
    text-align: center;
    padding: 30px 0;
    font-size: 0.9rem;
}

/* ===== 报价单 ===== */
.quote-header {
    border-bottom: 2px solid var(--accent);
    padding-bottom: 10px;
    margin-bottom: 16px;
}

.quote-company {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
}

.quote-date {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 4px;
}

.quote-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 16px;
    font-size: 0.88rem;
}

.quote-table th, .quote-table td {
    border: 1px solid var(--border);
    padding: 9px 12px;
    text-align: left;
}

.quote-table th {
    background: var(--bg);
    color: var(--text-dim);
    font-weight: 500;
}

.quote-price {
    font-variant-numeric: tabular-nums;
}

.quote-total {
    font-size: 1rem;
    margin-bottom: 12px;
}

.quote-watermark {
    margin-top: 14px;
    padding: 8px 0;
    text-align: center;
    font-size: 0.75rem;
    color: rgba(200, 149, 108, 0.6);
    border-top: 1px dashed var(--border);
}

/* ===== 升级弹窗 ===== */
.upgrade-list {
    margin-bottom: 16px;
}

.upgrade-item {
    padding: 8px 0;
    color: var(--text);
    font-size: 0.95rem;
}

.upgrade-plans {
    display: flex;
    gap: 12px;
    margin: 16px 0 10px;
}

.upgrade-plan {
    flex: 1;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s;
    background: var(--bg);
}

.upgrade-plan:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.upgrade-plan.hot {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent-dim);
}

.upgrade-plan-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.upgrade-plan-name em {
    font-style: normal;
    font-size: 0.7rem;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 1px 6px;
    border-radius: 3px;
    margin-left: 4px;
}

.upgrade-plan-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 10px;
    font-variant-numeric: tabular-nums;
}

.upgrade-plan-price span {
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-dim);
}

.upgrade-plan-btn {
    padding: 8px 0;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--bg);
    background: var(--accent);
    font-weight: 500;
}

.upgrade-tip {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 8px;
}

.upgrade-price {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
    padding: 12px 0;
    border-top: 1px dashed var(--border);
}

/* ===== 扫码付款弹窗 ===== */
.pay-modal {
    max-width: 420px;
}

.pay-plan-info {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 12px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 16px;
}

.pay-plan-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
}

.pay-plan-money {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

.pay-qrcode-wrap {
    text-align: center;
    padding: 12px;
}

.pay-qrcode {
    width: 220px;
    height: 220px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #fff;
}

.pay-steps {
    font-size: 0.85rem;
    color: var(--text-dim);
    text-align: center;
    line-height: 1.7;
    margin-bottom: 4px;
}

.pay-steps code {
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: 3px;
    color: var(--accent);
    user-select: all;
}

.pay-steps-dim {
    font-size: 0.75rem;
    color: var(--text-dim);
    opacity: 0.6;
    text-align: center;
    margin-bottom: 14px;
}

.pay-confirm-btn {
    width: 100%;
    padding: 12px;
    font-size: 0.95rem;
}

.pay-confirm-btn:disabled {
    opacity: 0.6;
    cursor: wait;
}

.pay-tip {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 10px;
}

/* ===== Toast ===== */
#toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--accent);
    color: var(--bg);
    padding: 10px 22px;
    border-radius: 4px;
    font-size: 0.88rem;
    font-weight: 500;
    opacity: 0;
    transition: all 0.3s;
    z-index: 200;
    pointer-events: none;
}

#toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.log-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-bottom: 12px;
}

/* ===== 管理后台布局（侧边栏） ===== */
.admin-layout {
    display: flex;
    gap: 18px;
    align-items: flex-start;
}
.admin-sidebar {
    width: 170px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: sticky;
    top: 16px;
}
.side-item {
    text-align: left;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text-dim);
    font-size: 0.92rem;
    cursor: pointer;
    font-family: inherit;
    transition: all .15s ease;
}
.side-item:hover {
    border-color: var(--accent);
    color: var(--text);
}
.side-item.active {
    background: var(--accent-dim);
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 600;
}
.side-ico {
    width: 15px;
    height: 15px;
    vertical-align: -2px;
    margin-right: 7px;
}
.side-badge {
    display: inline-block;
    min-width: 18px;
    height: 18px;
    line-height: 18px;
    text-align: center;
    border-radius: 9px;
    background: #b35;
    color: #fff;
    font-size: 0.7rem;
    margin-left: 6px;
    padding: 0 5px;
}
.admin-main {
    flex: 1;
    min-width: 0;
}
.tab-page {
    animation: fade-in .2s ease;
}
@keyframes fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: none; }
}
@media (max-width: 800px) {
    .admin-layout { flex-direction: column; }
    .admin-sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; position: static; }
    .side-item { flex: 1; min-width: 90px; text-align: center; padding: 8px 6px; font-size: 0.82rem; }
}