:root {
    --primary: #15356b;
    --primary-dark: #0f2a55;
    --primary-light: #e8edf5;
    --accent: #2563eb;
    --text: #1f2937;
    --text-secondary: #6b7280;
    --bg: #ffffff;
    --bg-soft: #f6f8fb;
    --border: #e6eaf1;
    --shadow: 0 4px 14px rgba(21, 53, 107, 0.06);
    --shadow-lg: 0 18px 40px rgba(21, 53, 107, 0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.logo-img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: var(--shadow);
}

.nav {
    display: flex;
    gap: 28px;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav a:hover {
    color: var(--primary);
}

/* ==================== 站内公告 ==================== */
.notice-bar {
    background: linear-gradient(135deg, #ffa758 0%, #ef7d2c 100%);
    color: #fff;
    padding: 13px 0;
}

.notice-inner {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.notice-tag {
    flex: none;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 1.2px;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 3px 11px;
    border-radius: 9999px;
}

.notice-text {
    flex: 1 1 340px;
    margin: 0;
    font-size: 0.92rem;
    line-height: 1.6;
}

.notice-link {
    flex: none;
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
    padding-bottom: 2px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.55);
    transition: opacity 0.2s ease;
}

.notice-link:hover {
    opacity: 0.8;
}


/* ==================== Section eyebrow ==================== */
.section-eyebrow {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 2.4px;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 12px;
    border-radius: 9999px;
    margin-bottom: 14px;
    text-transform: uppercase;
}

/* Section common */
.section-header {
    text-align: center;
    margin-bottom: 28px;
}

.section-header h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Tools */
.tools {
    padding: 40px 0 56px;
    background: var(--bg);
}

.tools-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}
@media (min-width: 640px) {
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}
@media (min-width: 1080px) {
    .tools-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 18px;
    }
}

.tool-card {
    position: relative;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    color: inherit;
    overflow: hidden;
}

.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.tool-status {
    margin-bottom: 10px;
}

.status-badge {
    display: inline-block;
    padding: 2px 9px;
    border-radius: 9999px;
    font-size: 0.7rem;
    font-weight: 600;
}

.status-badge.live {
    background: #dcfce7;
    color: #166534;
}

.status-badge.dev {
    background: #fef3c7;
    color: #92400e;
}

.status-badge.soon {
    background: #f3f4f6;
    color: var(--text-secondary);
}

.tool-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    font-size: 1.2rem;
    margin-bottom: 10px;
    transition: transform .25s ease;
}
.tool-card:hover .tool-icon {
    transform: scale(1.06);
}

.tool-card h3 {
    font-size: 1.02rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}

.tool-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.55;
    margin-bottom: 12px;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tool-desc.is-expanded {
    display: block;
    -webkit-line-clamp: unset;
    line-clamp: unset;
    overflow: visible;
}

.tool-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: auto;
    position: relative;
    z-index: 2;
}

.tool-more {
    background: none;
    border: 0;
    padding: 0;
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
}
.tool-more:hover { text-decoration: underline; }
.tool-more[hidden] { display: none; }

.tool-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
    margin-left: auto;
}

.tool-link:hover {
    color: var(--primary-dark);
    gap: 10px;
}

.tool-link.disabled {
    color: var(--text-secondary);
    cursor: not-allowed;
    margin-left: auto;
}

/* 主推小角标（不改变卡片尺寸） */
.main-flag {
    position: absolute;
    top: 10px;
    right: 10px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #fff;
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 2px 8px;
    border-radius: 9999px;
    box-shadow: var(--shadow);
    z-index: 1;
}

.arrow {
    transition: var(--transition);
}

/* About */
.about {
    padding: 48px 0 56px;
    background: var(--bg-soft);
}

.about-content {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* Contact */
.contact {
    padding: 56px 0 64px;
    background: var(--bg);
    text-align: center;
}

.contact p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 20px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    max-width: 760px;
    margin: 16px auto 0;
}

.wechat-card {
    display: inline-flex;
    align-items: center;
    gap: 24px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 36px;
    box-shadow: var(--shadow);
    text-align: left;
}

.wechat-qr {
    width: 140px;
    height: 140px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
}

.wechat-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.wechat-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
}

/* Footer */
.footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 48px 0 24px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 32px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    text-decoration: none;
}

.footer-brand .logo-img {
    box-shadow: none;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-links a,
.footer-links span {
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.beian {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
    padding: 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 24px;
}

.beian-item a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #94a3b8;
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition);
}

.beian-item a:hover {
    color: white;
}

.beian-icon {
    width: 16px;
    height: 16px;
    object-fit: contain;
}

.copyright {
    text-align: center;
    font-size: 0.85rem;
    color: #64748b;
}

/* Responsive */
@media (max-width: 768px) {
    .header .container {
        height: 56px;
    }

    .logo-text {
        font-size: 1.1rem;
    }

    .logo-img {
        width: 32px;
        height: 32px;
    }

    .notice-inner {
        gap: 8px;
    }

    .notice-text {
        flex: 1 1 100%;
        font-size: 0.86rem;
    }

    .notice-link {
        width: 100%;
    }


    .section-header {
        margin-bottom: 24px;
    }

    .section-header h2 {
        font-size: 1.35rem;
    }

    .section-header p {
        font-size: 0.88rem;
    }

    .about,
    .contact {
        padding: 40px 0;
    }

    .about-content p {
        font-size: 0.92rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        max-width: 340px;
        margin: 14px auto 0;
        gap: 14px;
    }

    .wechat-card {
        flex-direction: column;
        text-align: center;
        padding: 20px;
        gap: 14px;
        width: 100%;
        max-width: 340px;
    }

    .wechat-qr {
        width: 116px;
        height: 116px;
        object-fit: cover;
    }

    .wechat-info h3 {
        font-size: 1.05rem;
    }

    .wechat-info p {
        font-size: 0.82rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .beian {
        flex-direction: column;
        gap: 12px;
    }

    .nav {
        display: none;
    }
}

/* ---------------- 管理后台 ---------------- */
.admin-main {
    padding: 60px 0 100px;
    min-height: 70vh;
    background: var(--bg-soft);
}

.admin-login {
    max-width: 380px;
    margin: 60px auto;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    box-shadow: var(--shadow);
}

.admin-login h2 {
    font-size: 1.5rem;
    margin-bottom: 24px;
}

.admin-login form,
.admin-form-card form {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.admin-login label,
.admin-form-card label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 10px;
}

.admin-login input,
.admin-form-card input,
.admin-form-card select,
.admin-form-card textarea {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    background: white;
    color: var(--text);
}

.admin-login input:focus,
.admin-form-card input:focus,
.admin-form-card select:focus,
.admin-form-card textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.admin-form-card label.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 400;
    margin-top: 14px;
}

.admin-form-card label.checkbox input {
    width: auto;
}

.btn-primary {
    margin-top: 18px;
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-ghost {
    padding: 8px 16px;
    background: white;
    color: var(--primary);
    border: 1px solid var(--primary);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-ghost:hover {
    background: var(--primary-light);
}

.btn-danger {
    padding: 8px 16px;
    background: white;
    color: #dc2626;
    border: 1px solid #fca5a5;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-danger:hover {
    background: #fef2f2;
}

.form-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 8px;
}

.flash {
    max-width: 600px;
    margin: 0 auto 20px;
    padding: 12px 18px;
    background: #fef3c7;
    color: #92400e;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
}

.admin-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 28px;
    align-items: start;
}

.admin-form-card,
.admin-list-card {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
}

.admin-form-card h3,
.admin-list-card h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
}

/* SSO 跳转卡片 */
.sso-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 18px 14px;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text);
    transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.sso-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(21,53,107,0.12);
    border-color: var(--primary);
    color: var(--text);
}
.sso-card-icon {
    font-size: 1.8rem;
    margin-bottom: 6px;
}
.sso-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}
.sso-card-sub {
    font-size: 0.78rem;
    color: var(--text-secondary);
    word-break: break-all;
}

.tool-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.tool-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.tool-list-main {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.tool-list-icon {
    font-size: 1.6rem;
    line-height: 1.2;
}

.tool-list-name {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-list-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
    line-height: 1.5;
}

.tool-list-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

@media (max-width: 900px) {
    .admin-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------------- 工具卡：扩展链接 + 移动端 ---------------- */
/* 「立即使用」链接的伪元素覆盖整张卡：点空白处也能跳转 */
.tool-link::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    border-radius: var(--radius);
}
.tool-link {
    position: relative;
    z-index: 2;
}
/* 「查看更多」按钮在覆盖层之上，优先接收点击 */
.tool-more {
    position: relative;
    z-index: 3;
}

@media (max-width: 768px) {
    .tools {
        padding: 32px 0 40px;
    }
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .tool-card {
        padding: 18px 18px 16px;
    }
    .tool-icon {
        width: 38px;
        height: 38px;
        font-size: 1.25rem;
        margin-bottom: 10px;
    }
    .tool-card h3 {
        font-size: 1.05rem;
        margin-bottom: 6px;
    }
    .tool-desc {
        font-size: 0.85rem;
        line-height: 1.55;
        margin-bottom: 12px;
        -webkit-line-clamp: 2;
        line-clamp: 2;
    }
    .main-flag {
        top: 10px;
        right: 12px;
        font-size: 0.66rem;
        padding: 2px 8px;
    }
}