/* ============================================
   学校后勤工作门户 - 样式表
   设计风格：简洁专业
   ============================================ */

/* --- CSS 变量 --- */
:root {
    --color-primary: #1a3a5c;
    --color-primary-light: #2c5282;
    --color-secondary: #2563eb;
    --color-accent: #d97706;
    --color-accent-light: #fef3c7;

    --color-bg: #fafbfc;
    --color-bg-alt: #f0f4f8;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;

    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-light: #94a3b8;

    --color-success: #059669;
    --color-warning: #d97706;
    --color-danger: #dc2626;

    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --nav-height: 68px;
    --max-width: 1200px;

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- 全局重置 --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

/* --- 导航栏 --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 4px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: var(--color-bg-alt);
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    position: relative;
    width: 36px;
    height: 36px;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: all var(--transition);
    position: absolute;
    left: 7px;
}

.hamburger {
    top: 17px;
}

.hamburger::before {
    content: '';
    top: -7px;
}

.hamburger::after {
    content: '';
    top: 7px;
}

.nav-toggle.open .hamburger {
    background: transparent;
}

.nav-toggle.open .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.open .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* --- Hero 区域 --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f2940 0%, #1a3a5c 40%, #1e4d7b 70%, #2563a8 100%);
    overflow: hidden;
    text-align: center;
    color: #fff;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.04) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(217,119,6,0.06) 0%, transparent 60%);
    pointer-events: none;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(255,255,255,0.008) 2px,
        rgba(255,255,255,0.008) 4px
    );
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 24px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-badge {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 8px;
}

.hero-subtitle {
    display: block;
    font-size: 1.25rem;
    font-weight: 400;
    color: rgba(255,255,255,0.8);
    margin-top: 4px;
    letter-spacing: 0.02em;
}

.hero-desc {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    margin: 24px 0 32px;
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: #fff;
    color: var(--color-primary);
    border-color: #fff;
}

.btn-primary:hover {
    background: #f0f4f8;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.4);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.7);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.6);
    margin-top: 4px;
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 0.8rem;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    font-size: 1.2rem;
    margin-top: 4px;
}

/* --- 通用 Section Header --- */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-accent-light);
    color: var(--color-accent);
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
}

/* --- 关于我 --- */
.about-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.about-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
}

.about-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-primary-light);
}

.about-icon {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.about-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.about-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.about-year {
    font-size: 0.8rem !important;
    color: var(--color-text-light) !important;
    margin-top: 8px !important;
}

/* --- 工作职责 --- */
.resp-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.resp-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.resp-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.resp-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.resp-card:hover::before {
    transform: scaleX(1);
}

.resp-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.resp-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.resp-card > p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.resp-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.resp-tags li {
    padding: 3px 10px;
    background: var(--color-bg-alt);
    color: var(--color-text-secondary);
    border-radius: 4px;
    font-size: 0.78rem;
    white-space: nowrap;
}

/* --- 常用工具 --- */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.tool-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition);
    position: relative;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-secondary);
    background: #f8faff;
}

.tool-icon {
    font-size: 2rem;
    margin-bottom: 14px;
}

.tool-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.tool-card p {
    font-size: 0.83rem;
    color: var(--color-text-secondary);
    flex: 1;
}

.tool-arrow {
    position: absolute;
    bottom: 20px;
    right: 24px;
    font-size: 1.1rem;
    color: var(--color-text-light);
    transition: all var(--transition);
}

.tool-card:hover .tool-arrow {
    color: var(--color-secondary);
    transform: translateX(4px);
}

/* --- 办事流程 --- */
.process-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.process-item {
    display: flex;
    gap: 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    transition: all var(--transition);
}

.process-item:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

.process-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.3;
    line-height: 1;
    flex-shrink: 0;
    min-width: 48px;
}

.process-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 6px;
}

.process-note {
    font-size: 0.82rem;
    color: var(--color-text-light);
    margin-bottom: 12px;
}

.process-sub {
    margin-bottom: 16px;
}

.process-sub:last-child {
    margin-bottom: 0;
}

.process-sub h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px dashed var(--color-border);
}

.process-steps {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

.process-steps span:not(.step-arrow) {
    padding: 6px 14px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.step-arrow {
    color: var(--color-text-light) !important;
    background: none !important;
    padding: 0 !important;
    font-weight: 600;
}

/* --- 资源下载 --- */
.resource-categories {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 860px;
    margin: 0 auto;
}

.resource-cat {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
}

.cat-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

.resource-items {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.resource-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    transition: all var(--transition);
    border: 1px solid transparent;
}

.resource-item:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-border);
}

.resource-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.resource-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
}

.resource-meta {
    font-size: 0.78rem;
    color: var(--color-text-light);
}

.btn-download {
    padding: 8px 20px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-download:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 官网下载按钮 */
.btn-download-official {
    background: #059669;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.btn-download-official:hover {
    background: #047857;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.external-icon {
    font-size: 0.75rem;
    opacity: 0.8;
}

/* 本地下载按钮 */
.btn-download-local {
    background: var(--color-text-light);
    cursor: pointer;
    display: inline-block;
}

.btn-download-local:hover {
    background: var(--color-text-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 资源底部入口 */
.resource-footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
}

.resource-footer-note {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 20px;
    line-height: 1.6;
}

.resource-portal-link {
    display: inline-block;
    padding: 14px 36px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition);
    text-decoration: none;
}

.resource-portal-link:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    color: #fff;
}

/* --- 联系方式 --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
}

.contact-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.contact-form-wrap {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    transition: all var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    background: #fff;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* Toast 提示 */
.toast {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(-120px);
    padding: 14px 28px;
    border-radius: var(--radius-md);
    color: #fff;
    font-weight: 500;
    font-size: 0.9rem;
    z-index: 9999;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-lg);
}

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

.toast.success { background: var(--color-success); }
.toast.info { background: var(--color-secondary); }

/* --- 页脚 --- */
.footer {
    background: var(--color-primary);
    color: rgba(255,255,255,0.7);
    text-align: center;
    padding: 40px 0;
}

.footer-text {
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.footer-copy {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.5);
}

/* --- 动画 --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* 滚动渐入动画 */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- 响应式设计 --- */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: repeat(2, 1fr); }
    .resp-grid { grid-template-columns: repeat(2, 1fr); }
    .tools-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 2.6rem; }
}

@media (max-width: 768px) {
    :root { --nav-height: 60px; }

    .section { padding: 64px 0; }
    .section-title { font-size: 1.7rem; }
    .section-header { margin-bottom: 40px; }

    .nav-toggle { display: block; }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.96);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        transform: translateY(-10px);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition);
    }

    .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .hero { min-height: 90vh; }
    .hero-title { font-size: 2rem; }
    .hero-desc { font-size: 0.95rem; }
    .hero-stats { gap: 24px; }
    .stat-number { font-size: 1.8rem; }

    .about-grid { grid-template-columns: 1fr 1fr; }
    .resp-grid { grid-template-columns: 1fr; }
    .tools-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .process-steps { gap: 4px; }
    .process-steps span:not(.step-arrow) { font-size: 0.78rem; padding: 4px 10px; }
}

@media (max-width: 480px) {
    .about-grid { grid-template-columns: 1fr; }
    .tools-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 1.7rem; }
    .hero-actions { flex-direction: column; align-items: center; }
    .resource-item { flex-direction: column; align-items: flex-start; gap: 10px; }
    .btn-download { width: 100%; text-align: center; }
    .process-item { flex-direction: column; gap: 12px; }
    .contact-form-wrap { padding: 20px; }
}