/* ========================================
   对弈 - 五子棋在线对战官网
   DuiYi.top - 水墨国风版
   ======================================== */

/* === 自定义字体 === */
@font-face {
    font-family: 'LingDuPengFan';
    src: url('../webfonts/ChaoZiSheLingDuPengFan-2.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

/* Noto Sans SC 本地字体 */
@font-face {
    font-family: 'Noto Sans SC';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('../webfonts/NotoSansSC-Regular.woff2') format('woff2');
}

@font-face {
    font-family: 'Noto Sans SC';
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url('../webfonts/NotoSansSC-Medium.woff2') format('woff2');
}

@font-face {
    font-family: 'Noto Sans SC';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('../webfonts/NotoSansSC-Bold.woff2') format('woff2');
}

@font-face {
    font-family: 'Noto Sans SC';
    font-style: normal;
    font-weight: 900;
    font-display: swap;
    src: url('../webfonts/NotoSansSC-Black.woff2') format('woff2');
}

/* === 变量定义 === */
:root {
    /* 主色调 - 水墨宣纸色系 */
    --color-paper: #F5F0E6;
    --color-paper-dark: #E8E0D0;
    --color-ink: #2D2D2D;
    --color-ink-light: #4A4A4A;
    --color-ink-muted: #6B6B6B;
    
    /* 棋盘木质色 */
    --color-wood-light: #E8D4B8;
    --color-wood: #D4A76A;
    --color-wood-dark: #8B6914;
    
    /* 棋子颜色 */
    --color-stone-black: #1a1a1a;
    --color-stone-white: #f5f5f5;
    
    /* 强调色 - 朱红印章色 */
    --color-accent: #C94A4A;
    --color-accent-dark: #A03030;
    
    /* 字体 */
    --font-display: 'LingDuPengFan', 'Zhi Mang Xing', 'Long Cang', cursive;
    --font-title: 'LingDuPengFan', 'Long Cang', cursive;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 50%;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.15);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: var(--font-body);
    background: var(--color-paper);
    color: var(--color-ink);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

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

img {
    max-width: 100%;
    height: auto;
}

/* === 背景 === */
.bg-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.bg-container::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(245, 240, 230, 0.3);
    pointer-events: none;
}

.bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* === 导航栏 === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(245, 240, 230, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(45, 45, 45, 0.1);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(245, 240, 230, 0.95);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    border: 2px solid rgba(45, 45, 45, 0.1);
}

.logo-text {
    font-family: 'LingDuPengFan', var(--font-display);
    font-size: 2rem;
    color: var(--color-ink);
    letter-spacing: 0.15em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    font-size: 0.95rem;
    color: var(--color-ink-light);
    position: relative;
    padding: var(--spacing-sm) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-ink);
    transition: width var(--transition-normal);
}

.nav-link:hover {
    color: var(--color-ink);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-ink);
    transition: all var(--transition-fast);
}

/* === Hero 区域 === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px var(--spacing-lg) var(--spacing-3xl);
    max-width: 1400px;
    margin: 0 auto;
    gap: var(--spacing-3xl);
}

.hero-content {
    flex: 1;
    max-width: 500px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(45, 45, 45, 0.08);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    color: var(--color-ink-light);
    border: 1px solid rgba(45, 45, 45, 0.15);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease forwards;
}

.hero-title {
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.1s forwards;
    opacity: 0;
}

.title-chinese {
    display: block;
    font-family: 'LingDuPengFan', var(--font-display);
    font-size: 6.5rem;
    color: #1a1a1a;
    line-height: 1.1;
    text-shadow: 3px 3px 0 rgba(255,255,255,0.7), 0 0 30px rgba(0,0,0,0.1);
    letter-spacing: 0.15em;
}

.title-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-ink-light);
    margin-top: var(--spacing-sm);
    font-family: 'LingDuPengFan', var(--font-display);
    letter-spacing: 0.15em;
    text-shadow: 1px 1px 0 rgba(255,255,255,0.6);
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--color-ink);
    line-height: 2;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
    font-weight: 400;
    text-shadow: 1px 1px 0 rgba(255,255,255,0.9), 0 0 20px rgba(255,255,255,0.5);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease 0.3s forwards;
    opacity: 0;
}

/* === 按钮样式 === */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: none;
    background: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200%;
    height: 300%;
    object-fit: contain;
    z-index: 0;
    transition: all var(--transition-normal);
    pointer-events: none;
}

.btn-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-2xl);
    color: #fff;
    font-size: 1.05rem;
    font-weight: 500;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    white-space: nowrap;
    transition: all var(--transition-normal);
}

.btn:hover .btn-bg {
    transform: translate(-50%, -50%) scale(1.05);
    filter: sepia(0.3) saturate(1.2);
}

.btn:hover .btn-content {
    text-shadow: 0 2px 6px rgba(0,0,0,0.6);
}

.btn:hover {
    transform: translateY(-3px);
}

.btn-outline .btn-bg {
    opacity: 0.85;
}

.btn-primary {
    min-width: 180px;
    min-height: 55px;
}

.btn-outline {
    min-width: 170px;
    min-height: 55px;
}

/* === 统计数字 === */
.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    animation: fadeInUp 0.6s ease 0.4s forwards;
    opacity: 0;
}

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

.stat-number {
    display: block;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-ink);
    font-family: 'LingDuPengFan', var(--font-display);
}

.stat-number::after {
    content: '+';
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-ink-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(45, 45, 45, 0.2);
}

/* === 棋盘预览 === */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    padding-right: var(--spacing-xl);
    animation: fadeInRight 0.8s ease 0.3s forwards;
    opacity: 0;
}

.board-preview {
    position: relative;
    width: 450px;
}

.board-frame {
    width: 100%;
    height: auto;
    display: block;
}

.game-board {
    position: absolute;
    top: 5%;
    left: 8%;
    width: 84%;
    height: 58%;
    display: grid;
    grid-template-columns: repeat(15, 1fr);
    grid-template-rows: repeat(15, 1fr);
}

.board-stone {
    position: absolute;
    width: 24px;
    height: 24px;
    transform: translate(-50%, -50%);
    z-index: 1;
    animation: placeStone 0.3s ease;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.board-stone.black {
    background-image: url('../img/black.png');
}

.board-stone.white {
    background-image: url('../img/white.png');
}

@keyframes placeStone {
    0% { transform: translate(-50%, -50%) scale(0); opacity: 0; }
    50% { transform: translate(-50%, -50%) scale(1.15); }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

/* 棋局状态指示 */
.game-status {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'LingDuPengFan', var(--font-display);
    font-size: 2.5rem;
    color: var(--color-ink);
    text-shadow: 2px 2px 0 rgba(255,255,255,0.8);
    opacity: 0;
    pointer-events: none;
    z-index: 10;
    transition: opacity 0.5s ease;
}

.game-status.show {
    opacity: 1;
}

.game-status.black-win {
    color: #1a1a1a;
}

.game-status.white-win {
    color: #666;
}

.player-indicator {
    position: absolute;
    bottom: 3%;
    left: 6%;
    width: 88%;
    height: 30%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
}

.player {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    opacity: 0.6;
    transition: all var(--transition-normal);
}

.player.active {
    opacity: 1;
}

.player-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(45, 45, 45, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-ink-muted);
    font-size: 1.1rem;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
}

.player.active .player-avatar {
    background: var(--color-ink);
    color: #fff;
    border-color: var(--color-ink);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

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

.player-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-ink);
}

.player-status {
    font-size: 0.85rem;
    color: var(--color-ink-muted);
    font-weight: 500;
}

.player.active .player-status {
    color: var(--color-accent);
    font-weight: 600;
}

.vs-badge {
    font-weight: 700;
    color: var(--color-ink);
    font-size: 2.2rem;
    font-family: 'LingDuPengFan', var(--font-display);
    text-shadow: 1px 1px 0 rgba(255,255,255,0.5);
    letter-spacing: 0.1em;
}

/* === 通用区块样式 === */
section {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-badge {
    display: inline-block;
    background: rgba(45, 45, 45, 0.12);
    color: var(--color-ink);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(45, 45, 45, 0.2);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    font-family: 'LingDuPengFan', var(--font-display);
    color: var(--color-ink);
    letter-spacing: 0.1em;
}

.section-desc {
    font-size: 1.15rem;
    color: var(--color-ink);
    max-width: 600px;
    margin: 0 auto;
    font-weight: 400;
    text-shadow: 1px 1px 0 rgba(255,255,255,0.8);
}

/* === 功能特色 === */
.features {
    background: linear-gradient(180deg, 
        transparent, 
        rgba(45, 45, 45, 0.03), 
        transparent
    );
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.feature-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(45, 45, 45, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.8);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-lg);
    background: var(--color-ink);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: #fff;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-ink);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--color-ink-muted);
    line-height: 1.7;
}

/* === 使用方式 === */
.steps-container {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--spacing-lg);
}

.step-card {
    flex: 1;
    max-width: 300px;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(45, 45, 45, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    position: relative;
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-ink);
    color: #fff;
    font-size: 1.3rem;
    font-weight: 700;
    font-family: 'LingDuPengFan', var(--font-display);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    letter-spacing: 0.15em;
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: var(--spacing-md) auto var(--spacing-lg);
    background: rgba(45, 45, 45, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--color-ink);
}

.step-card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-ink);
}

.step-card p {
    font-size: 0.95rem;
    color: var(--color-ink-muted);
}

.step-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 60px;
    color: var(--color-ink);
    font-size: 1.5rem;
    opacity: 0.3;
}

/* === 下载区域 === */
.download {
    padding: var(--spacing-3xl) var(--spacing-lg);
}

.download-card {
    max-width: 800px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(45, 45, 45, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.download-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.download-icon {
    width: 90px;
    height: 90px;
    flex-shrink: 0;
}

.download-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-lg);
}

.download-info h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-ink);
}

.download-info p {
    color: var(--color-ink-muted);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}

.download-meta {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 0.85rem;
    color: var(--color-ink-muted);
}

.download-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.download-actions {
    text-align: center;
}

.btn-download {
    min-width: 200px;
    min-height: 60px;
}

.btn-download .btn-content {
    flex-direction: row;
    gap: var(--spacing-md);
}

.btn-download .btn-content i {
    font-size: 1.5rem;
}

.btn-download .btn-content span {
    text-align: left;
}

.btn-download .btn-content small {
    display: block;
    font-size: 0.75rem;
    opacity: 0.8;
}

.download-alt {
    margin-top: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--color-ink-muted);
}

.download-alt a {
    color: var(--color-accent);
}

.download-alt a:hover {
    text-decoration: underline;
}

.download-alt .divider {
    margin: 0 var(--spacing-sm);
    opacity: 0.3;
}

/* === 页脚 === */
.footer {
    background: rgba(45, 45, 45, 0.05);
    border-top: 1px solid rgba(45, 45, 45, 0.1);
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-lg);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.8rem;
    font-weight: 700;
    font-family: 'LingDuPengFan', var(--font-display);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.15em;
}

.footer-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
}

.footer-brand p {
    color: var(--color-ink);
    font-size: 1rem;
    font-weight: 400;
}

.footer-links {
    display: flex;
    gap: var(--spacing-3xl);
}

.footer-column h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-ink);
    font-weight: 600;
}

.footer-column a {
    display: block;
    color: var(--color-ink);
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    font-weight: 400;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(45, 45, 45, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-ink-light);
    font-size: 0.9rem;
}

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 120px;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .board-preview {
        width: 380px;
    }
    
    .hero-visual {
        justify-content: center;
        padding-right: 0;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .download-card {
        flex-direction: column;
        text-align: center;
    }
    
    .download-content {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(245, 240, 230, 0.98);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .title-chinese {
        font-size: 3.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-container {
        flex-direction: column;
        align-items: center;
    }
    
    .step-arrow {
        transform: rotate(90deg);
        padding: var(--spacing-md) 0;
    }
    
    .step-card {
        max-width: 100%;
    }
    
    .board-preview {
        width: 300px;
    }
    
    .footer-container {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .stat-divider {
        display: none;
    }
    
    .download-meta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .board-preview {
        width: 280px;
    }
}

/* === ICP 备案链接 === */
.icp-link {
    margin-top: var(--spacing-sm);
}

.icp-link a {
    color: var(--color-ink-muted);
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

.icp-link a:hover {
    color: var(--color-ink);
}

/* === 模态框 === */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--color-paper);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    padding: var(--spacing-2xl);
    position: relative;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(45, 45, 45, 0.1);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-ink-muted);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(45, 45, 45, 0.2);
    color: var(--color-ink);
}

.modal-title {
    font-family: 'LingDuPengFan', var(--font-display);
    font-size: 1.8rem;
    color: var(--color-ink);
    margin-bottom: var(--spacing-lg);
    padding-right: var(--spacing-xl);
    letter-spacing: 0.1em;
}

.modal-body {
    color: var(--color-ink-light);
    line-height: 1.8;
}

.modal-body p {
    margin-bottom: var(--spacing-md);
}

.modal-body h4 {
    color: var(--color-ink);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
    font-size: 1.1rem;
}

.modal-body ul {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.modal-body li {
    margin-bottom: var(--spacing-xs);
}

.modal-body .email-highlight {
    display: inline-block;
    background: rgba(45, 45, 45, 0.1);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    color: var(--color-ink);
    margin-top: var(--spacing-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.modal-body .email-highlight:hover {
    background: rgba(45, 45, 45, 0.2);
    color: var(--color-accent);
}