/* ===== 嫩草影院 全局样式表 ===== */
/* 风格：现代影视平台 · 深蓝科技感 · 毛玻璃质感 */

/* ===== 主题变量 ===== */
:root {
    --bg-page: #0b1424;
    --bg-card: #131f33;
    --bg-card-hover: #1a2a42;
    --bg-elevated: #1c2f4a;
    --text-primary: #e8eef7;
    --text-secondary: #9fb3c8;
    --text-heading: #ffffff;
    --text-link: #6db3ff;
    --text-link-hover: #a8d4ff;
    --text-footer: #7c8fa5;
    --border-light: #243b57;
    --border-glow: #3a6ea5;
    --bg-footer: #071120;
    --btn-bg: linear-gradient(135deg, #0f6bb5, #0e4f8a);
    --btn-bg-hover: linear-gradient(135deg, #1284d9, #0f6bb5);
    --btn-text: #ffffff;
    --nav-bg: rgba(10, 20, 35, 0.75);
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
    --shadow-hover: 0 12px 40px rgba(0, 80, 160, 0.25);
    --glow-primary: rgba(0, 140, 255, 0.15);
    --card-backdrop: rgba(20, 35, 55, 0.6);
    --accent: #00a8ff;
    --accent-2: #ffb84d;
    --success: #2ecc71;
    --radius-lg: 22px;
    --radius-md: 14px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-page: #f0f4fa;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fbff;
    --bg-elevated: #eef3fa;
    --text-primary: #1f2c3c;
    --text-secondary: #5a6d82;
    --text-heading: #0e1a2b;
    --text-link: #0066cc;
    --text-link-hover: #004a99;
    --text-footer: #4a5f73;
    --border-light: #d3dfeb;
    --border-glow: #b0cfe8;
    --bg-footer: #0b1a2f;
    --btn-bg: linear-gradient(135deg, #0077e6, #005bb5);
    --btn-bg-hover: linear-gradient(135deg, #1a8cff, #0066cc);
    --btn-text: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.82);
    --shadow: 0 4px 20px rgba(0, 20, 50, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 60, 120, 0.12);
    --glow-primary: rgba(0, 120, 255, 0.08);
    --card-backdrop: rgba(255, 255, 255, 0.7);
    --accent: #0066cc;
    --accent-2: #e68a00;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background-color: var(--bg-page);
    background-image: 
        radial-gradient(ellipse at 20% 30%, var(--glow-primary), transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(0, 100, 200, 0.08), transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    transition: background-color 0.4s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-page);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--accent), #3a6ea5);
    border-radius: 10px;
    border: 2px solid var(--bg-page);
}
::-webkit-scrollbar-thumb:hover {
    background: #00a8ff;
}
::selection {
    background: var(--accent);
    color: #fff;
}

/* ===== 排版 ===== */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-heading);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
}
h1 {
    font-size: 2.4rem;
    margin: 1rem 0;
    background: linear-gradient(135deg, var(--text-heading), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
h2 {
    font-size: 2rem;
    margin: 3rem 0 1.5rem;
    position: relative;
    padding-left: 1.2rem;
    border-left: 4px solid var(--accent);
    border-radius: 2px;
    background: linear-gradient(90deg, var(--glow-primary), transparent);
    padding: 0.5rem 1rem;
}
h3 {
    font-size: 1.35rem;
    margin: 1.2rem 0 0.8rem;
}
h4 {
    font-size: 1.1rem;
    margin: 1rem 0 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
}
p {
    margin-bottom: 1.2rem;
    color: var(--text-primary);
    line-height: 1.8;
}
a {
    color: var(--text-link);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}
a:hover {
    color: var(--text-link-hover);
    text-decoration: none;
}
strong {
    color: var(--text-heading);
    font-weight: 700;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 0;
    gap: 1rem;
}
.logo {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--text-heading);
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--text-heading), var(--text-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}
.logo span {
    background: linear-gradient(135deg, #00a8ff, #00d4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
}
.menu {
    display: flex;
    gap: 1.2rem;
    align-items: center;
    list-style: none;
}
.menu a {
    color: var(--text-primary);
    font-weight: 500;
    padding: 0.5rem 0.8rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
    font-size: 0.95rem;
}
.menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
    border-radius: 2px;
}
.menu a:hover {
    color: var(--accent);
    background: rgba(0, 168, 255, 0.08);
}
.menu a:hover::after {
    width: 80%;
}
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
}
.hamburger:hover {
    background: var(--glow-primary);
}
.hamburger span {
    width: 26px;
    height: 2.5px;
    background: var(--text-heading);
    margin: 3px 0;
    border-radius: 4px;
    transition: var(--transition);
}
.theme-toggle, .search-icon {
    background: none;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--text-primary);
    margin-left: 10px;
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition);
    line-height: 1;
}
.theme-toggle:hover, .search-icon:hover {
    background: var(--glow-primary);
    transform: rotate(15deg);
}

/* ===== 搜索框 ===== */
.search-box {
    display: flex;
    gap: 4px;
    align-items: center;
    background: var(--bg-card);
    border-radius: 40px;
    padding: 0.15rem 0.3rem 0.15rem 1rem;
    border: 1px solid var(--border-light);
    transition: var(--transition);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}
.search-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--glow-primary);
}
.search-box input {
    border: none;
    background: none;
    padding: 0.55rem 0.3rem;
    outline: none;
    color: var(--text-primary);
    width: 170px;
    font-size: 0.9rem;
    transition: var(--transition);
}
.search-box input::placeholder {
    color: var(--text-secondary);
}
.search-box button {
    background: var(--btn-bg);
    border: none;
    font-size: 1rem;
    cursor: pointer;
    color: var(--btn-text);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}
.search-box button:hover {
    background: var(--btn-bg-hover);
    transform: scale(1.05);
}

/* ===== 按钮 ===== */
.btn {
    background: var(--btn-bg);
    color: var(--btn-text);
    padding: 0.7rem 2rem;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    display: inline-block;
    transition: var(--transition);
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(0, 100, 200, 0.3);
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}
.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}
.btn:hover {
    background: var(--btn-bg-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 100, 200, 0.4);
    color: #fff;
}
.btn:hover::before {
    left: 100%;
}
.btn:active {
    transform: translateY(0);
}

/* ===== 卡片系统 ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin: 2rem 0;
}
.card {
    background: var(--card-backdrop);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 1.8rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    opacity: 0;
    transition: var(--transition);
}
.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--border-glow);
    background: var(--bg-card-hover);
}
.card:hover::before {
    opacity: 1;
}
.card h3 {
    margin-top: 0.5rem;
    color: var(--text-heading);
    font-size: 1.3rem;
}
.card p {
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}
.badge {
    display: inline-block;
    background: linear-gradient(135deg, rgba(0, 168, 255, 0.2), rgba(0, 168, 255, 0.1));
    color: var(--accent);
    padding: 0.25rem 1rem;
    border-radius: 30px;
    font-size: 0.8rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    border: 1px solid rgba(0, 168, 255, 0.2);
}

/* ===== Banner ===== */
.banner {
    background: linear-gradient(145deg, #0a1e33 0%, #0f3050 40%, #1a4a70 100%);
    color: white;
    padding: 4rem 2rem;
    border-radius: 28px;
    margin: 2.5rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 168, 255, 0.15) 0%, transparent 50%);
    animation: bannerPulse 4s ease-in-out infinite;
}
@keyframes bannerPulse {
    0%, 100% { transform: scale(0.8); opacity: 0.5; }
    50% { transform: scale(1.2); opacity: 1; }
}
.banner h2 {
    color: white;
    border: none;
    background: none;
    font-size: 2.2rem;
    font-weight: 800;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
    padding: 0;
    margin-bottom: 1rem;
}
.banner p {
    color: #b8d4e8;
    font-size: 1.1rem;
    position: relative;
    z-index: 1;
    margin-bottom: 2rem;
}
.banner .btn {
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, #ffb84d, #ff9f1a);
    color: #0a1e33;
    font-weight: 700;
    box-shadow: 0 4px 20px rgba(255, 159, 26, 0.4);
}
.banner .btn:hover {
    background: linear-gradient(135deg, #ffc266, #ffb84d);
    transform: translateY(-2px) scale(1.02);
}
.highlight {
    color: var(--accent-2);
    font-weight: 700;
}

/* ===== FAQ 手风琴 ===== */
.faq-item {
    border-bottom: 1px solid var(--border-light);
    padding: 1.2rem 0;
    transition: var(--transition);
}
.faq-item:first-child {
    border-top: 1px solid var(--border-light);
}
.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-heading);
    font-size: 1.05rem;
    padding: 0.5rem 0;
    transition: var(--transition);
    gap: 1rem;
}
.faq-question:hover {
    color: var(--accent);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in-out;
    color: var(--text-primary);
    padding-left: 1.5rem;
    line-height: 1.8;
    font-size: 0.95rem;
}
.faq-item.active .faq-answer {
    max-height: 500px;
    padding-top: 0.8rem;
    padding-bottom: 0.3rem;
}
.faq-item.active .faq-icon {
    transform: rotate(45deg);
    color: var(--accent);
}
.faq-icon {
    font-size: 1.8rem;
    line-height: 1;
    font-weight: 300;
    transition: transform 0.3s ease;
    color: var(--accent);
    flex-shrink: 0;
}

/* ===== 页脚 ===== */
footer {
    background-color: var(--bg-footer);
    color: var(--text-footer);
    padding: 3.5rem 0 2rem;
    margin-top: 4rem;
    border-top: 1px solid var(--border-light);
    position: relative;
}
footer::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
footer a {
    color: #8fa8c7;
    transition: var(--transition);
    font-size: 0.9rem;
}
footer a:hover {
    color: var(--accent);
    text-decoration: none;
}
footer .footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}
footer h4 {
    color: #eef2f6;
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    position: relative;
    padding-bottom: 0.5rem;
}
footer h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}
footer p {
    color: var(--text-footer);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== 表格 ===== */
.table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
}
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
}
th {
    background: linear-gradient(135deg, #0b4f8a, #0a3d6b);
    color: white;
    padding: 14px 16px;
    font-weight: 600;
    text-align: left;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}
td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
    font-size: 0.95rem;
}
tr:last-child td {
    border-bottom: none;
}
tr:hover td {
    background: var(--glow-primary);
}

/* ===== 文章列表 ===== */
.article-list {
    display: grid;
    gap: 20px;
}
.article-item {
    background: var(--card-backdrop);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.article-item:hover {
    transform: translateX(6px);
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}
.article-item h3 {
    margin-bottom: 0.5rem;
    color: var(--text-heading);
    font-size: 1.15rem;
}
.article-meta {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.article-item p {
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 0.8rem;
}
.read-more {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9rem;
}

/* ===== 滚动动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 面包屑 ===== */
.breadcrumb {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 1.2rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.breadcrumb a {
    color: var(--text-link);
    transition: var(--transition);
}
.breadcrumb a:hover {
    color: var(--accent);
}

/* ===== 数字统计 ===== */
.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), #00d4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    display: inline-block;
}

/* ===== 返回顶部 ===== */
#backTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--btn-bg);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 999;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}
#backTop:hover {
    transform: translateY(-3px) scale(1.05);
    background: var(--btn-bg-hover);
    box-shadow: 0 8px 30px rgba(0, 100, 200, 0.4);
}

/* ===== 专题卡片 ===== */
.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
}
.topic-item {
    background: var(--card-backdrop);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    text-align: center;
}
.topic-item:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}
.topic-item h4 {
    color: var(--text-heading);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}
.topic-item p {
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
}

/* ===== 联系区域 ===== */
.contact-section {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--border-light);
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    box-shadow: var(--shadow);
}
.contact-section h4 {
    color: var(--text-heading);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}
.contact-section p {
    color: var(--text-primary);
    font-size: 0.95rem;
}

/* ===== 友情链接 ===== */
.friendly-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
    margin-bottom: 2.5rem;
}
.friendly-links a {
    padding: 0.4rem 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 30px;
    font-size: 0.9rem;
    transition: var(--transition);
    color: var(--text-primary);
}
.friendly-links a:hover {
    background: var(--glow-primary);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.7rem; }
    .banner { padding: 3rem 1.5rem; }
    .banner h2 { font-size: 1.8rem; }
}

@media (max-width: 800px) {
    body {
        font-size: 15px;
    }
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; margin: 2rem 0 1rem; }
    .menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--nav-bg);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 1rem 0;
        box-shadow: var(--shadow);
        border-bottom: 1px solid var(--border-light);
        gap: 0.5rem;
        max-height: 80vh;
        overflow-y: auto;
    }
    .menu.show {
        display: flex;
        animation: slideDown 0.3s ease;
    }
    @keyframes slideDown {
        from { opacity: 0; transform: translateY(-10px); }
        to { opacity: 1; transform: translateY(0); }
    }
    .menu a {
        padding: 0.8rem 2rem;
        font-size: 1rem;
        width: 100%;
        text-align: center;
    }
    .menu a::after {
        display: none;
    }
    .menu a:hover {
        background: var(--glow-primary);
    }
    .hamburger {
        display: flex;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
    }
    .search-box {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    .search-box input {
        width: 100%;
    }
    .nav-inner {
        flex-wrap: wrap;
    }
    .logo {
        font-size: 1.6rem;
    }
    .card-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .card {
        padding: 1.4rem;
    }
    .banner {
        padding: 2.5rem 1.2rem;
        border-radius: 20px;
        margin: 1.5rem 0;
    }
    .banner h2 {
        font-size: 1.5rem;
    }
    .topic-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .stat-number {
        font-size: 2.2rem;
    }
    #backTop {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    h1 { font-size: 1.6rem; }
    .card-grid {
        grid-template-columns: 1fr;
    }
    .topic-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    footer h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .banner h2 {
        font-size: 1.3rem;
    }
    .banner p {
        font-size: 0.95rem;
    }
    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
    .nav-inner {
        gap: 0.5rem;
    }
    .theme-toggle, .search-icon {
        font-size: 1.1rem;
        padding: 6px;
    }
    .contact-section {
        padding: 1.5rem;
        gap: 1rem;
    }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.gap-1 { gap: 1rem; }
.gap-2 { gap: 2rem; }

/* ===== 暗色模式过渡 ===== */
body, .navbar, .card, .article-item, .faq-item, .search-box {
    transition: background-color 0.4s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* ===== 统计区块 ===== */
.stats-wrapper {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: space-around;
    background: var(--bg-card);
    padding: 2.5rem 1.5rem;
    border-radius: 24px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow);
    margin: 2rem 0;
}
.stat-item {
    text-align: center;
    flex: 1;
    min-width: 150px;
}
.stat-item p {
    margin-top: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ===== 指南区块 ===== */
.guide-box {
    background: var(--bg-card);
    padding: 2.2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow);
    margin: 2rem 0;
}
.guide-box h4 {
    color: var(--text-heading);
    font-size: 1.15rem;
    margin-top: 0;
}
.guide-box p {
    font-size: 0.95rem;
}

/* ===== 打印样式 ===== */
@media print {
    .navbar, #backTop, .btn, .hamburger, .theme-toggle {
        display: none !important;
    }
    body {
        background: white;
        color: black;
    }
    .card, .article-item, .banner {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}