:root {
    --color-primary: #2563EB;
    --color-primary-hover: #1D4ED8;
    --color-primary-light: #DBEAFE;
    --color-primary-bg: #EFF6FF;
    --color-bg: #f4f7fc;
    --color-surface: #ffffff;
    --color-surface-hover: #f8faff;
    --color-text-primary: #0b1a33;
    --color-text-secondary: #4a5a72;
    --color-text-muted: #8a9bb5;
    --color-accent: #1a73e8;
    --color-accent-light: #e8f0fe;
    --color-accent-glow: rgba(26, 115, 232, 0.10);
    --color-border: #e2e8f0;
    --color-border-hover: #93c5fd;
    --color-success: #0d9e6b;
    --color-success-bg: #e6f7f0;
    --color-danger: #dc3545;
    --color-danger-bg: #fde8ea;
    --table-header-bg: #f0f6fd;
    --table-header-color: #1e4f8a;
    --table-border: #e2e8f0;
    --table-cell-bg: #ffffff;
    --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.05);
    --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.09);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-mono: "SF Mono", "Fira Code", "JetBrains Mono", monospace;
    --radius-sm: 4px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 40px;
    --radius-card: 14px;

    /* 过渡 */
    --transition: 0.2s ease;

    /* 弹窗遮罩 */
    --modal-overlay: rgba(15, 23, 42, 0.5);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s;
}

table {
    width: 100%;
    border-collapse: collapse;
    border-spacing: 0;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

table thead tr {
    background: var(--table-header-bg);
}

table th,
table td {
    border: 1px solid var(--table-border);
    padding: 5px;
    vertical-align: top;
    text-align: left;
    font-size: 0.85rem;
}

table th {
    font-weight: 600;
    color: var(--table-header-color);
    background-color: var(--table-header-bg);
}

table td {
    background-color: var(--table-cell-bg);
}

input,
textarea,
select {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1.5px solid var(--color-border);
    border-radius: 10px;
    font-size: 0.9rem;
    font-family: var(--font-mono);
    transition: 0.2s;
    background: var(--color-bg);
    color: var(--color-text-primary);
    resize: vertical;
    line-height: 1.7;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-accent);

}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-muted);
}

textarea {
    min-height: 120px;
    font-family: var(--font-mono);
}

select {
    appearance: auto;
    font-family: var(--font-sans);
    cursor: pointer;
    width: auto;
}

a:hover {
    color: #0d47a1;
}

.radio-group,
.checkbox-group {
    margin: 0.8rem 0;
    display: grid;
    grid-template-columns: 100px 1fr;
}

.radio-group .group-label,
.checkbox-group .group-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.radio-group .options,
.checkbox-group .options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
}

.radio-group label,
.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: 0.2s;
}

.radio-group label:hover,
.checkbox-group label:hover {
    color: var(--color-text-primary);
}

.radio-group input[type="radio"],
.checkbox-group input[type="checkbox"] {
    width: 15px;
    height: 15px;
    accent-color: var(--color-accent);
    cursor: pointer;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-primary);
}

.logo i {
    color: var(--color-accent);
    font-size: 1.8rem;
}

.logo .sub {
    font-weight: 400;
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-left: 0.2rem;
    letter-spacing: 0;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.8rem;
    list-style: none;
    font-weight: 500;
}

.nav-links a {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    padding: 0.4rem 0;
    border-bottom: 2px solid transparent;
    transition: 0.2s;
    display: inline-block;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-text-primary);
    border-bottom-color: var(--color-accent);
}

.nav-cta {
    background: var(--color-accent);
    color: #fff !important;
    padding: 0.5rem 1.4rem !important;
    border-radius: 40px;
    font-weight: 600;
    border-bottom: none !important;
    transition: 0.2s;
}

.nav-cta:hover {
    background: #1557b0;
    color: #fff !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
}

.nav-dropdown {
    position: relative;
    cursor: pointer;
}

.nav-dropdown>a {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.nav-dropdown>a i {
    font-size: 0.6rem;
    transition: transform 0.2s;
}

.nav-dropdown:hover>a i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-surface);
    border-radius: 16px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card-hover);
    min-width: 210px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transition: 0.2s;
    margin-top: 6px;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.6rem 1.5rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    border-bottom: none !important;
    transition: 0.15s;
    white-space: nowrap;
}

.dropdown-menu a:hover {
    background: var(--color-accent-light);
    color: var(--color-accent);
}

.dropdown-menu a i {
    font-size: 1.1rem;
    width: 20px;
    color: var(--color-accent);
}

.dropdown-menu .divider {
    height: 1px;
    background: var(--color-border);
    margin: 0.3rem 1rem;
}

.dropdown-menu .tag-sm {
    font-size: 0.6rem;
    background: var(--color-accent-light);
    color: var(--color-accent);
    padding: 0.1rem 0.5rem;
    border-radius: 40px;
    margin-left: 0.4rem;
}

.dropdown-menu .tag-wip-sm {
    background: #fef3e0;
    color: #f59e0b;
}

.nav-dropdown-posts {
    position: relative;
    cursor: pointer;
}

.nav-dropdown-posts>a {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.nav-dropdown-posts>a i {
    font-size: 0.6rem;
    transition: transform 0.2s;
}

.nav-dropdown-posts:hover>a i {
    transform: rotate(180deg);
}

.dropdown-menu-posts {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-surface);
    border-radius: 16px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card-hover);
    min-width: 160px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transition: 0.2s;
    margin-top: 6px;
}

.nav-dropdown-posts:hover .dropdown-menu-posts {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu-posts a {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.5rem 1.5rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    border-bottom: none !important;
    transition: 0.15s;
    white-space: nowrap;
}

.dropdown-menu-posts a:hover {
    background: var(--color-accent-light);
    color: var(--color-accent);
}

.dropdown-menu-posts .parent-cat {
    font-weight: 600;
    color: var(--color-text-primary);
    padding: 0.4rem 1.5rem 0.2rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
}

.dropdown-menu-posts .divider {
    height: 1px;
    background: var(--color-border);
    margin: 0.3rem 1rem;
}

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-overlay);
    backdrop-filter: blur(6px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

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

.modal-box {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: 2rem 2.2rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 30px 60px -16px rgba(0, 0, 0, 0.3);
    animation: modalFadeIn 0.25s ease;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-box .modal-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    color: var(--color-text);
}

.modal-box .modal-sub {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.modal-box .modal-body {
    margin-bottom: 1.2rem;
}

.modal-box .modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.6rem;
    padding-top: 0.8rem;
    border-top: 1px solid var(--color-border);
}

.modal-box .form-group {
    margin-bottom: 1rem;
}

.modal-box .form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 0.2rem;
}

.modal-box .form-group input {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    font-size: 0.9rem;
    font-family: inherit;
    transition: border var(--transition);
    background: var(--color-surface);
    color: var(--color-text);
}

.modal-box .form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.modal-box .btn-login {
    width: 100%;
    padding: 0.6rem;
    background: var(--color-primary);
    color: var(--color-surface);
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition);
    font-family: inherit;
}

.modal-box .btn-login:hover {
    background: var(--color-primary-hover);
}

.modal-box .btn-login:disabled {
    cursor: not-allowed;
    color: var(--color-text-muted);
    background: var(--color-primary-light);
}

.modal-box .modal-footer-text {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 1rem;
}

.modal-box .modal-footer-text a {
    color: var(--color-primary);
    text-decoration: none;
}

.modal-box .modal-footer-text a:hover {
    text-decoration: underline;
}

.modal-box .modal-close {
    float: right;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-light);
    cursor: pointer;
    transition: color var(--transition);
    line-height: 1;
}

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

.login-tabs {
    display: flex;
    gap: 0.3rem;
    background: var(--color-surface-hover);
    border-radius: var(--radius-full);
    padding: 3px;
    margin-bottom: 1.2rem;
}

.login-tab {
    flex: 1;
    padding: 0.4rem 0;
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    background: transparent;
    color: var(--color-text-secondary);
    transition: all var(--transition);
    font-family: inherit;
}

.login-tab.active {
    background: var(--color-primary);
    color: var(--color-surface);
}

.login-tab:hover:not(.active) {
    background: var(--color-surface-hover);
}

.btn-code {
    flex-shrink: 0;
    padding: 0.35rem 1rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    font-size: 0.75rem;
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--transition);
    font-family: inherit;
    white-space: nowrap;
}

.btn-code:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-hover);
}

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

.social-login-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.2rem 0.5rem;
    transition: all var(--transition);
    font-family: inherit;
    color: var(--color-text-secondary);
}

.social-login-btn:hover {
    transform: translateY(-2px);
    color: var(--color-primary);
}

.social-login-btn span:first-child {
    font-size: 1.8rem;
}

.social-login-btn span:last-child {
    font-size: 0.65rem;
}

.login-panel {
    animation: panelFadeIn 0.2s ease;
}

.btn-outline-nav {
    border: 1px solid var(--color-border);
    padding: 0.3rem 1rem;
    border-radius: var(--radius-full);
    background: var(--color-surface);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition);
}

.btn-outline-nav:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-hover);
}

.btn {
    display: inline-block;
    padding: 0.5rem 1.6rem;
    border-radius: 40px;
    font-weight: 600;
    transition: 0.25s;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-family: var(--font-sans);
}

.btn:disabled {
    cursor: not-allowed;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-surface);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(26, 115, 232, 0.25);
}

.btn-primary:disabled {
    color: var(--color-text-muted);
    background: var(--color-accent-light);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--color-border);
    color: var(--color-text-secondary);
}

.btn-outline:hover:not(:disabled) {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.btn-outline:disabled {
    border-color: var(--color-border);
    color: var(--color-text-muted);
}

.btn-success {
    background: var(--color-success);
    color: var(--color-surface);
}

.btn-success:hover:not(:disabled) {
    background: var(--color-success);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--color-success-bg);
}

.btn-danger {
    background: var(--color-danger);
    color: var(--color-surface);
    border-color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger);
    box-shadow: var(--color-danger-bg);
}

.btn-sm {
    padding: 0.3rem 1rem;
    font-size: 0.75rem;
}

.footer {
    border-top: 1px solid var(--color-border);
    padding: 1.5rem 0;
    color: var(--color-text-muted);
}

.footer-row {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer a {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    text-decoration: none;
}

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

.footer .footnote {
    font-size: 0.8rem;
}

@media (max-width: 1024px) {

    .dropdown-menu,
    .dropdown-menu-posts {
        left: 0;
        transform: none;
    }
}

@media (max-width: 768px) {

    .radio-group .options,
    .checkbox-group .options {
        gap: 0.4rem 0.8rem;
    }

    .radio-group label,
    .checkbox-group label {
        font-size: 0.8rem;
    }

    .nav-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem 0.8rem;
        margin-top: 0.5rem;
        width: 100%;
        border-top: 1px solid var(--color-border);
        padding-top: 0.5rem;
    }

    .nav-cta {
        padding: 0.2rem 0.8rem;
        font-size: 0.8rem;
    }

    .nav-toggle {
        display: block;
    }

    .nav-dropdown,
    .nav-dropdown-posts {
        position: static;
    }

    .dropdown-menu,
    .dropdown-menu-posts {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        border: none;
        background: transparent;
        padding: 0.2rem 0 0.2rem 0.8rem;
        display: none;
    }

    .nav-dropdown:hover .dropdown-menu,
    .nav-dropdown-posts:hover .dropdown-menu-posts {
        display: block;
    }

    .dropdown-menu a,
    .dropdown-menu-posts a {
        padding: 0.2rem 0;
        font-size: 0.8rem;
    }

    .dropdown-menu .divider,
    .dropdown-menu-posts .divider {
        display: none;
    }

    .dropdown-menu-posts .parent-cat {
        padding: 0.15rem 0;
        font-size: 0.65rem;
    }

    .footer {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 1rem 0;
    }

    .footer .social a {
        margin: 0 0.5rem;
    }

    .modal-box {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .modal-box {
        max-width: 95% !important;
        padding: 1.2rem !important;
    }

    .login-tab {
        font-size: 0.7rem;
        padding: 0.3rem 0;
    }

    .social-login-btn span:first-child {
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    .modal-box {
        margin: 1rem;
        padding: 1.5rem;
    }
}