/* ========================================
   Zy工作室 - 全局样式表 v3
   配色：专业蓝(#1a56db) + 浅蓝(#3b82f6) + 琥珀色(#f59e0b)
   参考扣子(Coze)官网风格，清爽、专业、现代
   ======================================== */

/* ===== CSS 变量 ===== */
:root {
    --color-primary: #1a56db;
    --color-primary-dark: #1e40af;
    --color-primary-light: #3b82f6;
    --color-primary-lighter: #93c5fd;
    --color-cyan: #3b82f6;
    --color-cyan-light: #93c5fd;
    --color-accent: #f59e0b;
    --color-accent-light: #fbbf24;
    --color-green: #10b981;
    --color-dark: #111827;
    --color-dark-2: #374151;
    --color-gray: #6b7280;
    --color-gray-light: #e5e7eb;
    --color-bg: #f9fafb;
    --color-white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 30px rgba(26, 86, 219, 0.1);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.3s ease;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--color-dark);
    background: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition);
}

ul {
    list-style: none;
}

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

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

/* ========================================
   顶部导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 64px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    transition: all var(--transition);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
}

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

/* LOGO */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: 10px;
    color: var(--color-white);
    font-weight: 800;
    font-size: 16px;
    letter-spacing: -0.5px;
    box-shadow: 0 2px 8px rgba(26, 86, 219, 0.3);
}

.logo-text {
    color: var(--color-dark);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

/* 导航菜单 */
.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    color: var(--color-dark-2);
    font-size: 15px;
    font-weight: 500;
    border-radius: 8px;
    transition: all var(--transition);
    cursor: pointer;
}

.nav-link:hover {
    color: var(--color-primary);
    background: rgba(26, 86, 219, 0.06);
}

.nav-btn-join {
    background: transparent;
    color: inherit !important;
    font-weight: 600;
    padding: 8px 22px;
    border-radius: 999px;
    box-shadow: none;
}

.nav-btn-join:hover {
    background: var(--color-primary);
    color: var(--color-white) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26, 86, 219, 0.35);
}

.nav-btn-join.nav-btn-active {
    color: var(--color-white) !important;
    background: var(--color-primary);
}

.nav-btn-active {
    color: var(--color-primary) !important;
    font-weight: 600;
}

/* 下拉箭头 */
.arrow {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid currentColor;
    transition: transform var(--transition);
}

.dropdown:hover .arrow {
    transform: rotate(180deg);
}

/* 下拉菜单 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 220px;
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 100;
    border: 1px solid var(--color-gray-light);
}

.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid var(--color-white);
}

.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    color: var(--color-dark-2);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition);
}

.dropdown-menu li a:hover {
    background: rgba(26, 86, 219, 0.04);
    color: var(--color-primary);
    padding-left: 24px;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: all var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   首屏轮播
   ======================================== */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    margin-top: 0;
}

.hero-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 1s ease;
    z-index: 1;
}

.hero-slide.active {
    opacity: 1;
    z-index: 2;
}

.slide-1 {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 35%, #1a56db 70%, #3b82f6 100%);
}

.slide-1::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(59, 130, 246, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(26, 86, 219, 0.15) 0%, transparent 50%);
}

.slide-2 {
    background: linear-gradient(135deg, #0c2d4a 0%, #1a56db 35%, #3b82f6 70%, #60a5fa 100%);
}

.slide-2::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 30% 20%, rgba(96, 165, 250, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 50%);
}

.slide-3 {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 35%, #1a56db 70%, #2563eb 100%);
}

.slide-3::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 25% 25%, rgba(37, 99, 235, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(30, 58, 95, 0.15) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 0 24px;
    animation: fadeUp 1s ease;
}

.hero-title {
    font-size: clamp(36px, 7vw, 72px);
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: 2px;
    margin-bottom: 20px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: clamp(18px, 3vw, 28px);
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
    letter-spacing: 1px;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 轮播箭头 */
.hero-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-white);
    z-index: 10;
    transition: all var(--transition);
}

.hero-arrow:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-50%) scale(1.1);
}

.hero-prev { left: 30px; }
.hero-next { right: 30px; }

/* 圆点指示器 */
.hero-dots {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.hero-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all var(--transition);
}

.hero-dot.active {
    width: 36px;
    border-radius: 6px;
    background: var(--color-white);
}

/* ========================================
   通用 Section
   ======================================== */
.section {
    padding: 44px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--color-dark);
    letter-spacing: 1px;
}

.section-title h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--color-dark);
}

.section-title p {
    color: var(--color-gray);
    margin-top: 8px;
    font-size: 1rem;
}

.section-title .line,
.section-divider {
    width: 48px;
    height: 3px;
    margin: 16px auto 0;
    background: var(--color-primary);
    border-radius: 2px;
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ========================================
   团队合影展示
   ======================================== */
.team-section {
    background: var(--color-white);
}

.team-photo {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: 40px;
}

.team-photo-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #1a56db 0%, #3b82f6 50%, #60a5fa 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    position: relative;
    overflow: hidden;
}

.team-photo-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 15% 85%, rgba(255, 255, 255, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.06) 0%, transparent 40%);
}

.team-photo-icon { position: relative; z-index: 2; }
.team-photo-text {
    position: relative;
    z-index: 2;
    color: var(--color-white);
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 3px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.team-tags {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.team-tag {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px 40px;
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    min-width: 160px;
    border: 1px solid var(--color-gray-light);
}

.team-tag:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-lighter);
}

.tag-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
}

.tag-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-dark);
    letter-spacing: 2px;
}

/* ========================================
   动态资讯列表
   ======================================== */
.news-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.news-card {
    display: flex;
    background: var(--color-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 1px solid var(--color-gray-light);
}

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

.news-thumb {
    flex-shrink: 0;
    width: 180px;
    display: block;
}

.news-thumb-placeholder {
    width: 100%;
    height: 100%;
    min-height: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--color-white);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
}

.news-thumb-1 { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.news-thumb-2 { background: linear-gradient(135deg, #3b82f6, #60a5fa); }
.news-thumb-3 { background: linear-gradient(135deg, #8b5cf6, #ec4899); }
.news-thumb-4 { background: linear-gradient(135deg, #10b981, #3b82f6); }

.news-body {
    flex: 1;
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.news-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 10px;
    font-size: 13px;
    color: var(--color-gray);
}

.news-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.news-summary {
    font-size: 14px;
    color: var(--color-gray);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 查看更多按钮 */
.section-more {
    text-align: center;
    margin-top: 40px;
}

.btn-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 36px;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 15px;
    font-weight: 600;
    border-radius: 50px;
    box-shadow: 0 4px 12px rgba(26, 86, 219, 0.25);
    transition: all var(--transition);
}

.btn-more::after {
    content: '→';
    font-size: 18px;
    transition: transform var(--transition);
}

.btn-more:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 86, 219, 0.3);
}

.btn-more:hover::after { transform: translateX(4px); }

/* ========================================
   友情链接
   ======================================== */
.friend-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.friend-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 40px 24px;
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    text-align: center;
    border: 1px solid var(--color-gray-light);
}

.friend-link:hover {
    transform: translateY(-6px);
    border-color: var(--color-primary-lighter);
    box-shadow: var(--shadow-lg);
}

.friend-link-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: rgba(26, 86, 219, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    transition: all var(--transition);
}

.friend-link:hover .friend-link-icon {
    background: var(--color-primary);
    color: var(--color-white);
    transform: scale(1.1);
}

.friend-link-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-dark-2);
}

/* ========================================
   底部页脚
   ======================================== */
.footer {
    background: #111827;
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-brand .footer-title {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-white);
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-brand .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
}

.footer-subtitle {
    color: var(--color-white);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 10px;
}

.footer-subtitle::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px;
}

.footer-links li { margin-bottom: 10px; }

.footer-links li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: all var(--transition);
}

.footer-links li a:hover {
    color: var(--color-primary-lighter);
    padding-left: 6px;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

.footer-contact li svg {
    flex-shrink: 0;
    color: var(--color-primary-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

/* ========================================
   返回顶部按钮
   ======================================== */
.back-to-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    border: none;
    border-radius: 50%;
    color: var(--color-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(26, 86, 219, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: 999;
}

.back-to-top.visible,
.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 24px rgba(26, 86, 219, 0.4);
    background: var(--color-primary-dark);
}

.back-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(26, 86, 219, 0.3);
    z-index: 500;
    border: none;
}

.back-top.show {
    opacity: 1;
    visibility: visible;
}

.back-top:hover {
    transform: translateY(-4px);
    background: var(--color-primary-dark);
}

/* ===== CSS 变量别名 ===== */
:root {
    --primary: #1a56db;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --primary-lighter: #93c5fd;
    --accent: #3b82f6;
    --accent-light: #93c5fd;
    --bg: #f9fafb;
    --bg2: #ffffff;
    --bg3: #eff6ff;
    --bg4: #dbeafe;
    --dark: #111827;
    --dark2: #374151;
    --text: #111827;
    --text2: #4b5563;
    --text3: #9ca3af;
    --border: #e5e7eb;
    --shadow: 0 1px 3px rgba(0,0,0,.06);
    --gradient: linear-gradient(135deg, #1a56db, #3b82f6);
    --gradient-dark: linear-gradient(135deg, #1e40af, #1a56db);
}

/* ===== 通用按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 10px;
    font-size: .95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all .3s;
    font-family: inherit;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(26,86,219,.25);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(26,86,219,.3);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

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

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

.btn-lg { padding: 16px 40px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* ===== 页面通用（子页面）===== */
.page-wrapper { padding-top: 64px; }

.page-header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    padding: 80px 0 60px;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255,255,255,.08) 1px, transparent 1px);
    background-size: 24px 24px;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    position: relative;
    margin-bottom: 12px;
}

.page-header p {
    font-size: 1.1rem;
    opacity: .9;
    position: relative;
}

.section-title-center {
    text-align: center;
    margin-bottom: 50px;
}

.section-title-center h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.section-title-center p {
    color: var(--color-gray);
    font-size: 1rem;
}

.section-title-center .line {
    width: 48px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px;
    margin: 16px auto 0;
}

/* ===== 通用卡片 ===== */
.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all .35s;
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.card-img {
    height: 200px;
    background: var(--bg3);
    overflow: hidden;
}

.card-body { padding: 20px; }

.card-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.card-body p {
    font-size: .875rem;
    color: var(--color-gray);
}

/* Grid */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ===== 移动端菜单 ===== */
.mobile-menu {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    height: calc(100vh - 64px);
    background: #fff;
    z-index: 999;
    transform: translateX(100%);
    transition: transform .35s;
    overflow-y: auto;
    padding: 20px;
    display: none;
}

.mobile-menu.open { transform: translateX(0); }

.mobile-menu .m-item { border-bottom: 1px solid var(--border); }

.mobile-menu .m-item > a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-dark);
}

.mobile-menu .m-sub { max-height: 0; overflow: hidden; transition: max-height .3s; }
.mobile-menu .m-item.open .m-sub { max-height: 500px; }

.mobile-menu .m-sub a {
    display: block;
    padding: 12px 32px;
    font-size: .9rem;
    color: var(--color-gray);
}

/* ===== 资讯列表（其他页面用）===== */
.news-item {
    display: flex;
    gap: 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all .3s;
    cursor: pointer;
}

.news-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(4px);
    border-color: var(--primary-lighter);
}

.news-item .news-thumb {
    width: 200px;
    height: 140px;
    flex-shrink: 0;
    background: var(--bg3);
    overflow: hidden;
}

.news-item .news-info {
    flex: 1;
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.news-info .news-meta {
    display: flex;
    gap: 16px;
    font-size: .8rem;
    color: var(--color-gray);
    margin-bottom: 8px;
}

.news-info p {
    font-size: .875rem;
    color: var(--color-gray);
    line-height: 1.5;
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination a {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .9rem;
    font-weight: 600;
    color: var(--color-gray);
    background: #fff;
    border: 1px solid var(--border);
    transition: all .25s;
    cursor: pointer;
}

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

.pagination a.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* ===== 表单 ===== */
.form-card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 40px;
    max-width: 800px;
    margin: 0 auto;
    border: 1px solid var(--border);
}

.form-group { margin-bottom: 22px; }

.form-group label {
    display: block;
    font-size: .9rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.form-group label .required { color: #ef4444; }

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: .95rem;
    color: var(--color-dark);
    transition: all .25s;
    font-family: inherit;
    background: #fff;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(26, 86, 219, .08);
}

textarea.form-control { min-height: 100px; resize: vertical; }
select.form-control { cursor: pointer; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.radio-group { display: flex; gap: 20px; }

.radio-item {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.radio-item input {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

.checkbox-group { display: flex; flex-wrap: wrap; gap: 12px; }

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all .2s;
    font-size: .875rem;
}

.checkbox-item:hover { border-color: var(--primary-light); }

.checkbox-item input {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

.checkbox-item.checked {
    border-color: var(--color-primary);
    background: var(--bg3);
}

/* ===== 倒计时 ===== */
.countdown-box {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    color: #fff;
}

.countdown-box h3 { font-size: 1.1rem; margin-bottom: 16px; opacity: .95; }

.countdown { display: flex; justify-content: center; gap: 16px; }

.countdown-item { text-align: center; }
.countdown-item .num { font-size: 2.5rem; font-weight: 900; line-height: 1; }
.countdown-item .label { font-size: .8rem; opacity: .8; margin-top: 4px; }

/* ===== 答疑 ===== */
.faq-tabs { display: flex; gap: 8px; margin-bottom: 30px; flex-wrap: wrap; }

.faq-tab {
    padding: 8px 20px;
    border-radius: 8px;
    font-size: .9rem;
    font-weight: 600;
    color: var(--color-gray);
    background: #fff;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all .25s;
}

.faq-tab.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.faq-list { display: flex; flex-direction: column; gap: 12px; }

.faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.faq-question {
    padding: 18px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    color: var(--color-dark);
    font-size: .95rem;
}

.faq-question .q-icon {
    font-size: 1.2rem;
    color: var(--color-primary);
    transition: transform .3s;
}

.faq-item.open .faq-question .q-icon { transform: rotate(45deg); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s;
    padding: 0 24px;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 24px 18px;
}

.faq-answer p {
    font-size: .9rem;
    color: var(--color-gray);
    line-height: 1.7;
}

/* ===== 关于页 ===== */
.about-intro {
    display: grid;
    grid-template-columns: 1fr;
    gap: 50px;
    align-items: center;
}

.about-intro .about-text h2 {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 16px;
}

.about-intro .about-text p {
    font-size: 1rem;
    color: var(--color-gray);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-intro .about-img {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    height: 360px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.2rem;
    font-weight: 600;
}

/* 关于页 - 发展历程板块 */
.about-block {
    margin-bottom: 32px;
}

.about-block h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 16px;
    padding-left: 16px;
    border-left: 4px solid var(--color-primary);
}

.about-block p, .about-block li {
    font-size: 1rem;
    color: var(--color-dark-2);
    line-height: 1.9;
}

.about-block ul {
    list-style: disc;
    padding-left: 24px;
}

.about-block ul li {
    margin-bottom: 8px;
}

.about-highlight {
    background: var(--bg3);
    border-radius: var(--radius);
    padding: 24px 28px;
    margin: 16px 0;
    border-left: 4px solid var(--color-primary);
}

.about-highlight p {
    font-size: 1rem;
    color: var(--color-dark-2);
    line-height: 1.8;
    margin: 0;
}

.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding-bottom: 32px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -34px;
    top: 4px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-primary);
    box-shadow: 0 0 0 4px var(--bg3);
}

.timeline-item .tl-year {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.timeline-item .tl-content {
    font-size: .95rem;
    color: var(--color-gray);
}

.stat-box {
    text-align: center;
    padding: 32px 20px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all .3s;
}

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

.stat-box .stat-num {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-primary);
}

.stat-box .stat-label {
    font-size: .9rem;
    color: var(--color-gray);
    margin-top: 4px;
}

/* ===== news.html 荣誉照片墙 ===== */
.honor-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.honor-card {
    background: var(--color-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all .35s;
    box-shadow: var(--shadow-sm);
}

.honor-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-lighter);
}

.honor-link {
    display: block;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.honor-photo {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    position: relative;
    overflow: hidden;
}

.honor-photo::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: linear-gradient(transparent, rgba(0,0,0,0.05));
}

.honor-info {
    padding: 20px;
}

.honor-info h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.honor-meta {
    font-size: .8rem;
    color: var(--color-gray);
    margin-bottom: 8px;
}

.honor-info p {
    font-size: .875rem;
    color: var(--color-dark-2);
    line-height: 1.6;
}

/* ===== 页脚兼容 ===== */
.footer-top {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-top .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 8px;
}

.footer-top .footer-logo .logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.footer-top p {
    font-size: .875rem;
    line-height: 1.7;
    margin-bottom: 16px;
    color: rgba(255,255,255,.6);
}

.footer-col h4 {
    font-size: .95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: .875rem;
    color: rgba(255,255,255,.6);
    padding: 4px 0;
    transition: color .2s;
}

.footer-col a:hover { color: #fff; }

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand .footer-logo .logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.footer-brand p {
    font-size: .875rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.footer-bottom-text {
    border-top: 1px solid rgba(255,255,255,.08);
    padding-top: 20px;
    text-align: center;
    font-size: .825rem;
    color: rgba(255,255,255,.4);
}

/* ===== 后台管理 ===== */
.admin-body {
    background: var(--bg);
    display: flex;
    min-height: 100vh;
    padding: 0;
}

.admin-sidebar {
    width: 240px;
    background: var(--color-dark);
    color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform .3s;
    overflow-y: auto;
}

.admin-sidebar .admin-logo {
    padding: 20px 24px;
    font-size: 1.1rem;
    font-weight: 800;
    border-bottom: 1px solid rgba(255,255,255,.1);
    display: flex;
    align-items: center;
    gap: 10px;
}

.admin-sidebar .admin-logo .logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .9rem;
}

.admin-nav { padding: 12px 0; }

.admin-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    font-size: .9rem;
    color: rgba(255,255,255,.7);
    transition: all .2s;
    cursor: pointer;
}

.admin-nav a:hover,
.admin-nav a.active {
    background: rgba(255,255,255,.1);
    color: #fff;
}

.admin-nav a .a-icon {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.admin-main {
    flex: 1;
    margin-left: 240px;
    padding: 24px;
    min-height: 100vh;
}

.admin-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.admin-topbar h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-dark);
}

.admin-user { display: flex; align-items: center; gap: 10px; }

.admin-user .avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: .9rem;
}

.admin-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

.admin-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 16px;
}

.admin-section { display: none; }
.admin-section:first-of-type { display: block; }

.data-table { width: 100%; border-collapse: collapse; }

.data-table th {
    text-align: left;
    padding: 12px 16px;
    font-size: .8rem;
    font-weight: 600;
    color: var(--color-gray);
    border-bottom: 2px solid var(--border);
}

.data-table td {
    padding: 12px 16px;
    font-size: .875rem;
    color: var(--color-dark);
    border-bottom: 1px solid var(--border);
}

.data-table tr:hover { background: var(--bg3); }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: .75rem;
    font-weight: 600;
}

.badge-warning { background: #fef3c7; color: #92400e; }
.badge-success { background: #d1fae5; color: #065f46; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1e40af; }

.stat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-card .sc-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #fff;
}

.stat-card .sc-info .sc-num {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--color-dark);
}

.stat-card .sc-info .sc-label {
    font-size: .85rem;
    color: var(--color-gray);
}

.admin-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-dark);
    position: relative;
}

.admin-login .login-box {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}

.admin-login .login-box h2 {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.admin-login .login-box p {
    text-align: center;
    color: var(--color-gray);
    margin-bottom: 28px;
    font-size: .9rem;
}

/* ===== 系统卡片 ===== */
.sys-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    transition: all .35s;
    position: relative;
    overflow: hidden;
}

.sys-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform .35s;
}

.sys-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

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

.sys-card .sys-icon {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    background: var(--bg3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 16px;
    transition: all .35s;
}

.sys-card:hover .sys-icon {
    background: var(--color-primary);
    transform: scale(1.1);
}

.sys-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.sys-card p {
    font-size: .85rem;
    color: var(--color-gray);
    margin-bottom: 16px;
    line-height: 1.5;
}

.sys-card .sys-btn {
    display: inline-block;
    padding: 8px 24px;
    border-radius: 8px;
    font-size: .85rem;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--bg3);
    transition: all .25s;
}

.sys-card:hover .sys-btn {
    background: var(--color-primary);
    color: #fff;
}

/* ===== 博客 ===== */
.blog-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all .35s;
}

.blog-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.blog-item .blog-img {
    height: 200px;
    background: var(--bg3);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.blog-item .blog-body { padding: 24px; }

.blog-item .blog-cat {
    display: inline-block;
    padding: 3px 12px;
    border-radius: 6px;
    font-size: .75rem;
    font-weight: 600;
    background: var(--bg3);
    color: var(--color-primary);
    margin-bottom: 10px;
}

.blog-item h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.blog-item p {
    font-size: .875rem;
    color: var(--color-gray);
    line-height: 1.6;
    margin-bottom: 12px;
}

.blog-item .blog-meta {
    display: flex;
    gap: 16px;
    font-size: .8rem;
    color: var(--color-gray);
}

/* ========================================
   响应式设计
   ======================================== */

/* 平板 */
@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 64px;
        right: 0;
        width: 300px;
        max-width: 80vw;
        height: calc(100vh - 64px);
        background: var(--color-white);
        padding: 24px;
        transform: translateX(100%);
        transition: transform var(--transition);
        overflow-y: auto;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    }

    .nav-menu.active { transform: translateX(0); }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
    }

    .nav-item { width: 100%; }

    .nav-link {
        width: 100%;
        padding: 14px 16px;
        font-size: 16px;
        border-bottom: 1px solid var(--color-gray-light);
        border-radius: 0;
        color: var(--color-dark);
    }

    .hamburger { display: flex; }

    .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        background: rgba(0, 0, 0, 0.02);
        box-shadow: none;
        border-radius: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition);
        border: none;
    }

    .dropdown-menu::before { display: none; }

    .dropdown.active .dropdown-menu { max-height: 500px; }

    .dropdown-menu li a {
        padding: 12px 32px;
        color: var(--color-gray);
        font-size: 14px;
    }

    .dropdown-menu li a:hover { padding-left: 36px; }

    .news-list { grid-template-columns: 1fr; }
    .friend-links { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .team-photo-placeholder { height: 300px; }
    .team-tags { gap: 20px; }
    .section { padding: 60px 0; }
    .section-title { font-size: 28px; }

    .hero-arrow { width: 40px; height: 40px; }
    .hero-prev { left: 15px; }
    .hero-next { right: 15px; }

    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-top { grid-template-columns: 1fr 1fr; }
    .about-intro { grid-template-columns: 1fr; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .honor-grid { grid-template-columns: repeat(2, 1fr); }
}

/* 手机 */
@media (max-width: 600px) {
    .news-card { flex-direction: column; }

    .news-thumb { width: 100%; height: 140px; }
    .news-thumb-placeholder { min-height: 140px; }
    .friend-links { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }

    .team-tags {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .team-tag {
        width: 100%;
        max-width: 240px;
        flex-direction: row;
        justify-content: flex-start;
        gap: 16px;
        padding: 16px 24px;
    }

    .hero-arrow { display: none; }
    .hero-dots { bottom: 24px; }
    .container { padding: 0 16px; }
    .section { padding: 48px 0; }
    .section-title { font-size: 24px; }

    .back-to-top {
        right: 16px;
        bottom: 16px;
        width: 42px;
        height: 42px;
    }

    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .news-item { flex-direction: column; }
    .news-item .news-thumb { width: 100%; height: 180px; }
    .form-row { grid-template-columns: 1fr; }
    .page-header { padding: 60px 0 40px; }
    .page-header h1 { font-size: 1.8rem; }
    .admin-sidebar { transform: translateX(-100%); }
    .admin-sidebar.open { transform: translateX(0); }
    .admin-main { margin-left: 0; }
    .footer-top { grid-template-columns: 1fr; gap: 24px; }
    .countdown-item .num { font-size: 1.8rem; }
    .form-card { padding: 24px; }
    .stat-box .stat-num { font-size: 2rem; }
    .honor-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .page-header h1 { font-size: 1.5rem; }
    .countdown { gap: 10px; }
    .countdown-item .num { font-size: 1.5rem; }
}

@media (max-width: 768px) {
    .mobile-menu { display: block; }
}