/* =================================================================
// styles.css - Contega (筑界物语) - 春节主题 (2026 马年红金喜庆)
// 主题: iOS 26 Concept 风格 + 中国春节红金配色
// ================================================================= */

:root {
    /* --- 核心色盘 (红金喜庆主题) --- */
    --ios-primary: #c41e3a;          /* 中国红 主色 */
    --ios-primary-light: #e63946;    /* 稍浅红，用于 hover */

    /* 渐变辅助色 - 经典红金渐变 */
    --ios-gradient-start: #c41e3a;   /* 深红 */
    --ios-gradient-end: #d4af37;     /* 经典金色 */

    /* 强调色 */
    --ios-accent: #d4af37;           /* 金色 */

    /* 文字颜色 */
    --ios-text-primary: #1a1a1a;     /* 深色文字 */
    --ios-text-secondary: #4a4a4a;

    /* 背景流体色 (春节氛围 - 暖红金渐变) */
    --ios-bg-mesh-1: #fff5f5;        /* 浅粉红 */
    --ios-bg-mesh-2: #fffbe6;        /* 浅金黄 */
    --ios-bg-mesh-3: #ffcccc;        /* 辅助浅红 */
    --ios-bg-mesh-4: #fff3cd;        /* 辅助浅金 */

    /* 玻璃材质 - 偏暖调，带金边 */
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(212, 175, 55, 0.3); /* 金色边框 */
    --glass-shadow: 0 8px 32px 0 rgba(212, 175, 55, 0.12); /* 金色光晕 */
    --glass-blur: 30px;
    --glass-radius: 28px;

    /* 组件特定 */
    --nav-bg: rgba(255, 255, 255, 0.92);
    --input-bg: rgba(255, 245, 245, 0.6);
    --code-bg: rgba(196, 30, 58, 0.08); /* 极淡的红色背景 */
}

/* --- 深色模式适配 (春节暗黑红金版) --- */
@media (prefers-color-scheme: dark) {
    :root {
        --ios-text-primary: #f8f9fa;
        --ios-text-secondary: #adb5bd;

        --ios-bg-mesh-1: #2d0a0e;     /* 暗红 */
        --ios-bg-mesh-2: #3a2a0f;     /* 暗金 */
        --ios-bg-mesh-3: #3d0f14;
        --ios-bg-mesh-4: #4a3a0f;

        --glass-bg: rgba(40, 20, 20, 0.75);
        --glass-border: rgba(212, 175, 55, 0.25);
        --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.55);

        --nav-bg: rgba(30, 20, 20, 0.88);
        --input-bg: rgba(40, 20, 20, 0.5);
        --code-bg: rgba(212, 175, 55, 0.1);
    }
}

/* --- 全局重置 --- */
* { margin: 0; padding: 0; box-sizing: border-box; outline: none; -webkit-tap-highlight-color: transparent; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--ios-text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-color: var(--ios-bg-mesh-1);
}

/* --- 动态背景 (红金流体 + 春节氛围) --- */
.ios-background-mesh {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -1;
    background: 
        radial-gradient(at 0% 0%, var(--ios-bg-mesh-1) 0px, transparent 50%),
        radial-gradient(at 100% 0%, var(--ios-bg-mesh-2) 0px, transparent 50%),
        radial-gradient(at 100% 100%, var(--ios-bg-mesh-3) 0px, transparent 50%),
        radial-gradient(at 0% 100%, var(--ios-bg-mesh-4) 0px, transparent 50%);
    background-size: 200% 200%;
    animation: gradientMove 18s ease infinite alternate;
}

.ios-background-mesh::before {
    content: "";
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 25% 35%, rgba(212, 175, 55, 0.15) 0%, transparent 25%),
        radial-gradient(circle at 75% 65%, rgba(212, 175, 55, 0.12) 0%, transparent 20%);
    opacity: 0.6;
    animation: twinkle 10s infinite alternate;
}

@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes twinkle {
    0%, 100% { opacity: 0.45; }
    50% { opacity: 0.75; }
}

a { text-decoration: none; color: inherit; transition: opacity 0.2s; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 2; }

/* --- 玻璃组件基础 --- */
.glass-panel, .glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.glass-card {
    border-radius: var(--glass-radius);
    padding: 40px;
    margin-bottom: 24px;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(212, 175, 55, 0.25); /* 金色悬浮光 */
}

/* --- 导航栏 (悬浮岛) --- */
header {
    position: fixed;
    top: 24px;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 0 20px;
    display: flex;
    justify-content: center;
    pointer-events: none;
}

.navbar {
    width: auto;
    min-width: 320px;
    max-width: 95%;
    height: 56px;
    
    border-radius: 100px;
    background: var(--nav-bg);
    backdrop-filter: blur(25px) saturate(180%);
    -webkit-backdrop-filter: blur(25px) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px 0 24px;
    pointer-events: auto;
}

.nav-logo a {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--ios-text-primary);
}

.nav-logo i {
    color: var(--ios-accent); 
    background: -webkit-linear-gradient(45deg, var(--ios-gradient-start), var(--ios-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    gap: 2px;
    list-style: none;
    align-items: center;
    margin-left: 15px;
}

.nav-link {
    padding: 8px 14px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ios-text-primary);
    border-radius: 20px;
    transition: all 0.3s;
}

.nav-link:hover {
    background: rgba(196, 30, 58, 0.12); /* 悬浮淡红色 */
    color: var(--ios-primary);
}

.btn-glass-sm {
    background: linear-gradient(135deg, var(--ios-gradient-start), var(--ios-gradient-end));
    color: white !important;
    padding: 6px 18px;
    margin-left: 5px;
    box-shadow: 0 4px 10px rgba(212, 175, 55, 0.35);
    border: none;
}

.menu-toggle {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    transition: all 0.4s ease;
    z-index: 1001;
}

.bar {
    width: 24px;
    height: 3px;
    background: var(--ios-text-primary);
    border-radius: 2px;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    transform-origin: center;
}

/* 汉堡菜单动画 */
.menu-toggle.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.menu-toggle.active .bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.menu-toggle.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* 导航栏滚动交互 */
header, .navbar {
    transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}

header.scrolled {
    top: 0;
    padding: 0;
    background: transparent;
}

header.scrolled .navbar {
    width: 100%;
    max-width: 100%;
    height: 64px;
    border-radius: 0;
    border: none;
    background: rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(20px) saturate(180%) brightness(140%);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
    header.scrolled .navbar {
        background: rgba(40, 20, 20, 0.4);
        backdrop-filter: blur(20px) saturate(180%) brightness(120%);
        box-shadow: 0 1px 0 rgba(212, 175, 55, 0.15);
    }
}

header.scrolled .nav-link {
    color: var(--ios-text-primary);
}
header.scrolled .nav-link:hover {
    background: rgba(196, 30, 58, 0.2);
}

/* --- Hero 区域 --- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 100px 20px 40px;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(212, 175, 55, 0.25);
    color: var(--ios-primary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
    border: 1px solid rgba(212, 175, 55, 0.4);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.2);
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 15px;
    line-height: 1.1;
    background: linear-gradient(135deg, var(--ios-gradient-start) 0%, var(--ios-gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content h1 .en-title {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: 10px;
    margin-top: 10px;
    text-transform: uppercase;
    color: var(--ios-text-secondary);
    -webkit-text-fill-color: initial;
    opacity: 0.7;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--ios-text-secondary);
    margin-bottom: 30px;
    max-width: 500px;
    font-weight: 500;
}

.server-status-container {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(212, 175, 55, 0.4);
    border-radius: 50px;
    margin-bottom: 40px;
    font-weight: 600;
    font-size: 0.9rem;
    backdrop-filter: blur(10px);
    color: var(--ios-text-primary);
}

.status-dot { width: 8px; height: 8px; background: #d4af37; border-radius: 50%; box-shadow: 0 0 12px #d4af37; }
.pulsing { animation: pulse 2s infinite; }
@keyframes pulse { 0% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.2); } 100% { opacity: 1; transform: scale(1); } }

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

.ios-btn-primary, .ios-btn-secondary {
    padding: 14px 30px;
    border-radius: 30px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.ios-btn-primary {
    background: linear-gradient(135deg, var(--ios-gradient-start), var(--ios-gradient-end));
    color: white;
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.4);
}

.ios-btn-secondary {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(10px);
    color: var(--ios-text-primary);
    border: 1px solid rgba(212, 175, 55, 0.3);
}

.ios-btn-primary:hover, .ios-btn-secondary:hover { transform: scale(1.03); }

/* --- 通用内容样式 --- */
section { padding: 60px 0; }
.full-width { width: 100%; }

section h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--ios-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
section h2 i {
    color: var(--ios-primary);
}

.about-content { display: grid; grid-template-columns: 3fr 2fr; gap: 40px; align-items: center; }
.about-text p { color: var(--ios-text-secondary); margin-bottom: 15px; font-size: 1rem; }

.ios-grid-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin: 30px 0;
    text-align: center;
}
.grid-item { display: flex; flex-direction: column; align-items: center; gap: 10px; font-size: 0.85rem; color: var(--ios-text-secondary); }
.grid-item i { 
    font-size: 1.4rem; 
    color: var(--ios-primary); 
    background: rgba(196, 30, 58, 0.15); 
    padding: 12px; 
    border-radius: 50%; 
}

.server-specs {
    background: var(--input-bg);
    border-radius: 20px;
    padding: 24px;
    border: 1px solid rgba(212, 175, 55, 0.3);
}
.server-specs h4 { text-align: center; margin-bottom: 20px; color: var(--ios-text-primary); font-size: 1rem; }
.specs-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.spec-item { display: flex; flex-direction: column; text-align: center; }
.spec-label { font-size: 0.7rem; color: var(--ios-text-secondary); text-transform: uppercase; margin-bottom: 5px; }
.spec-value { font-weight: 700; color: var(--ios-primary); font-size: 0.9rem; }

.about-image { display: flex; justify-content: center; align-items: center; }
.floating-icon { 
    font-size: 10rem; 
    background: linear-gradient(135deg, var(--ios-gradient-start), var(--ios-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0.25; 
    animation: float 6s ease-in-out infinite; 
}
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-20px); } }

/* --- Rules --- */
.rules-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; margin-bottom: 30px; }
.rule-card { text-align: left; }
.rule-icon-bg { 
    width: 44px; height: 44px; 
    background: linear-gradient(135deg, var(--ios-gradient-start), var(--ios-gradient-end)); 
    border-radius: 14px; 
    display: flex; align-items: center; justify-content: center; 
    color: white; font-size: 1.1rem; margin-bottom: 15px; 
    box-shadow: 0 4px 10px rgba(212, 175, 55, 0.3);
}
.rule-card h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--ios-text-primary); }
.rule-card p { font-size: 0.9rem; color: var(--ios-text-secondary); }
.rules-cta { text-align: center; }
.ios-link { color: var(--ios-primary); font-weight: 600; display: inline-flex; align-items: center; gap: 5px; font-size: 0.95rem; }

/* --- Commands --- */
.commands-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.command-category h3 { margin-bottom: 15px; display: flex; align-items: center; gap: 8px; color: var(--ios-primary); font-size: 1.1rem; }
.command-list { display: flex; flex-direction: column; gap: 10px; }
.command-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--code-bg);
    padding: 10px 14px;
    border-radius: 10px;
}
.command-item code { 
    font-family: 'SF Mono', 'Courier New', monospace; 
    color: var(--ios-primary);
    font-weight: 600; 
    font-size: 0.9rem; 
}
.command-item span { font-size: 0.8rem; color: var(--ios-text-secondary); }

/* --- Contact & Footer --- */
.contact-wrapper { max-width: 600px; margin: 0 auto; text-align: center; }
.contact-form textarea {
    width: 100%;
    background: var(--input-bg);
    border: none;
    padding: 15px;
    border-radius: 14px;
    color: var(--ios-text-primary);
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    margin-bottom: 20px;
    transition: box-shadow 0.3s;
}
.contact-form textarea:focus { box-shadow: 0 0 0 2px rgba(212, 175, 55, 0.4); }

.footer { padding: 40px 0; text-align: center; margin-top: 20px; }
.footer p { color: var(--ios-text-secondary); font-size: 0.85rem; margin-bottom: 15px; }
.social-links { display: flex; justify-content: center; gap: 15px; }
.glass-icon {
    width: 36px; height: 36px;
    background: var(--glass-bg);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--ios-text-primary);
    border: 1px solid var(--glass-border);
    transition: 0.3s;
    font-size: 1.1rem;
}
.glass-icon:hover { 
    background: linear-gradient(135deg, var(--ios-gradient-start), var(--ios-gradient-end)); 
    color: white; 
    transform: rotate(360deg); 
    box-shadow: 0 4px 10px rgba(212, 175, 55, 0.4);
}

/* --- 移动端适配 --- */
@media (max-width: 768px) {
    header { top: 15px; padding: 0 10px; }
    .navbar { min-width: auto; width: 100%; padding: 0 15px; }
    
    .nav-menu {
        position: fixed;
        top: 80px; left: 15px; right: 15px;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        border-radius: 20px;
        flex-direction: column;
        padding: 20px;
        gap: 10px;
        display: none;
        box-shadow: 0 10px 40px rgba(0,0,0,0.12);
        border: 1px solid rgba(212, 175, 55, 0.3);
        margin-left: 0;
    }
    
    .nav-menu.active { display: flex; }
    .nav-item { width: 100%; text-align: center; }
    .nav-link { display: block; padding: 12px; }
    .menu-toggle { display: flex; margin-right: 0; }
    
    .hero-content h1 { font-size: 2.5rem; }
    .hero-content h1 .en-title { font-size: 0.9rem; letter-spacing: 5px; }
    .about-content { grid-template-columns: 1fr; }
    .about-image { display: none; }
    .specs-grid { grid-template-columns: repeat(2, 1fr); }
    .ios-grid-list { grid-template-columns: repeat(2, 1fr); }
}

/* --- 用户登录状态 (User Info Pill) 美化 --- */
.user-info-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(196, 30, 58, 0.12);
    padding: 6px 6px 6px 14px;
    border-radius: 30px;
    border: 1px solid rgba(196, 30, 58, 0.25);
    margin-left: 10px;
    transition: all 0.3s ease;
}

.user-info-pill:hover {
    background: rgba(196, 30, 58, 0.18);
    border-color: rgba(196, 30, 58, 0.35);
    box-shadow: 0 4px 12px rgba(212, 175, 55, 0.2);
}

.user-name-span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ios-primary);
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: inline-block;
    vertical-align: middle;
}

.logout-btn-small {
    background: #ffffff;
    border: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #c41e3a;
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.logout-btn-small:hover {
    background: #c41e3a;
    color: #ffffff;
    transform: scale(1.1) rotate(90deg);
    box-shadow: 0 4px 10px rgba(196, 30, 58, 0.3);
}

.logout-btn-small i {
    font-size: 0.85rem;
}

@media (prefers-color-scheme: dark) {
    .user-info-pill {
        background: rgba(212, 175, 55, 0.15);
        border-color: rgba(212, 175, 55, 0.3);
    }
    .user-name-span {
        color: #ffd700;
    }
    .logout-btn-small {
        background: rgba(255, 255, 255, 0.1);
    }
}

.menu-toggle:active {
    transform: scale(0.92);
}

/* ===== 公告页面专用（完全仿 rules 风格） ===== */

/* 英雄区 */
.rules-hero { 
    min-height: 60vh; 
    background: rgba(255,255,255,0.1); 
}

/* 规则网格布局 */
.rules-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
    gap: 24px; 
    margin-bottom: 30px; 
}

/* 规则卡片 */
.rule-card { 
    text-align: left; 
}
.rule-icon-bg { 
    width: 44px; height: 44px; 
    background: linear-gradient(135deg, var(--ios-gradient-start), var(--ios-gradient-end)); 
    border-radius: 14px; 
    display: flex; align-items: center; justify-content: center; 
    color: white; font-size: 1.1rem; margin-bottom: 15px; 
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.2);
}

/* 公告权重颜色 */
.priority-normal .rule-icon-bg {
    background: linear-gradient(135deg, #10b981, #34d399); /* 绿色 */
}
.priority-update .rule-icon-bg {
    background: linear-gradient(135deg, #3b82f6, #60a5fa); /* 青蓝 */
}
.priority-maintenance .rule-icon-bg {
    background: linear-gradient(135deg, #8b5cf6, #a78bfa); /* 紫色 */
}
.priority-important .rule-icon-bg {
    background: linear-gradient(135deg, #ef4444, #f97316); /* 红色 */
}

.announcement-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.announcement-date {
    font-size: 0.85rem;
    color: var(--ios-text-secondary);
}

.announcement-tag {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.priority-normal .announcement-tag { background: #10b981; }
.priority-update .announcement-tag { background: #3b82f6; }
.priority-maintenance .announcement-tag { background: #8b5cf6; }
.priority-important .announcement-tag { background: #ef4444; }

.rule-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--ios-text-primary);
    line-height: 1.3;
}

.rule-card-content {
    font-size: 0.95rem;
    color: var(--ios-text-secondary);
    line-height: 1.7;
}

/* 总览网格 */
.rules-overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 30px 0;
}
.overview-item {
    text-align: center;
    padding: 20px;
    background: rgba(255,255,255,0.4);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    transition: all 0.3s;
    cursor: default;
}
.overview-item:hover {
    transform: translateY(-4px);
    background: var(--ios-gradient-start);
    color: white;
}
.overview-item i {
    font-size: 2rem;
    display: block;
    margin-bottom: 8px;
    color: var(--ios-primary);
}

/* 快速导航 */
.quick-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin: 40px 0;
}
.quick-nav-item {
    text-align: center;
    padding: 16px;
    background: rgba(255,255,255,0.4);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    transition: all 0.3s;
    cursor: pointer;
    color: var(--ios-text-primary);
}
.quick-nav-item:hover {
    transform: translateY(-4px);
    background: var(--ios-gradient-start);
    color: white;
    box-shadow: 0 10px 30px rgba(13, 148, 136, 0.3);
}
.quick-nav-item i { font-size: 1.5rem; display: block; margin-bottom: 8px; }

/* 加载/错误状态 */
.loading-placeholder, .error-placeholder {
    grid-column: 1/-1;
    text-align: center;
    padding: 60px 20px;
    color: var(--ios-text-secondary);
}
.loading-placeholder i, .error-placeholder i {
    font-size: 3rem;
    margin-bottom: 16px;
    color: var(--ios-primary);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .rules-grid { grid-template-columns: 1fr; }
    .rules-section .glass-card { max-width: 100%; }
    .announcement-header { flex-direction: column; align-items: flex-start; gap: 8px; }
    .quick-nav-grid { grid-template-columns: repeat(2, 1fr); }
}

/* 加载/错误占位 */
.loading-placeholder, .error-placeholder {
    text-align: center;
    padding: 60px 20px;
    font-size: 1.1rem;
    color: var(--ios-text-secondary);
}

.loading-placeholder i, .error-placeholder i {
    font-size: 3rem;
    margin-bottom: 16px;
    color: var(--ios-primary);
}

/* ===== 公告权重颜色 ===== */
.priority-normal .rule-icon-bg {
    background: linear-gradient(135deg, #10b981, #34d399); /* 绿色 - 普通 */
}

.priority-update .rule-icon-bg {
    background: linear-gradient(135deg, #3b82f6, #60a5fa); /* 蓝色 - 更新 */
}

.priority-maintenance .rule-icon-bg {
    background: linear-gradient(135deg, #8b5cf6, #a78bfa); /* 紫色 - 维护 */
}

.priority-important .rule-icon-bg {
    background: linear-gradient(135deg, #ef4444, #f97316); /* 红色 - 重要 */
}

.priority-normal .announcement-tag,
.priority-update .announcement-tag,
.priority-maintenance .announcement-tag,
.priority-important .announcement-tag {
    color: white;
    font-weight: 600;
}

.priority-normal .announcement-tag {
    background: #10b981;
}

.priority-update .announcement-tag {
    background: #3b82f6;
}

.priority-maintenance .announcement-tag {
    background: #8b5cf6;
}

.priority-important .announcement-tag {
    background: #ef4444;
}

/* hover 时加强视觉反馈 */
.rule-card.hover-lift:hover .rule-icon-bg {
    transform: scale(1.1);
}