/* 
 * 北疆红韵 - 核心样式表 (极致美化与功能强化版)
 */

:root {
    --primary-red: #C8102E;      /* 中国红 */
    --primary-dark: #8B0000;     /* 深红/暗红 */
    --secondary-gold: #D4AF37;   /* 金色 */
    --light-gold: #F1D279;       /* 亮金 */
    --bg-beige: #FDFBF7;         /* 米白背景 */
    --text-dark: #1A1A1A;        /* 近黑 */
    --text-mid: #444444;         /* 深灰 */
    --text-light: #777777;       /* 中灰 */
    --border: #E0E0E0;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
    --card-shadow: 0 5px 15px rgba(200, 16, 46, 0.05);
    --gold-gradient: linear-gradient(135deg, #D4AF37 0%, #F1D279 50%, #D4AF37 100%);
    --red-gradient: linear-gradient(135deg, #C8102E 0%, #8B0000 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: "Source Han Serif SC", "Noto Serif CJK SC", "SimSun", serif;
    background-color: var(--bg-beige);
    color: var(--text-dark);
    line-height: 1.8;
    background-image: radial-gradient(var(--border) 0.5px, transparent 0.5px);
    background-size: 30px 30px; /* 微弱暗纹背景 */
}

/* 统一布局模块样式 */
.unified-section {
    padding: 80px 0;
    position: relative;
}

.unified-section:nth-child(even) {
    background-color: #FFFFFF;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 10;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-title::before {
    content: '\f24e'; /* FontAwesome flag icon */
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: rgba(200, 16, 46, 0.1);
    font-size: 5rem;
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: -1;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-red);
    margin-bottom: 15px;
    letter-spacing: 4px;
    font-weight: 900;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
    display: inline-block;
    position: relative;
}

.section-title h2::before, .section-title h2::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 50px;
    height: 2px;
    background: var(--gold-gradient);
}

.section-title h2::before { left: -70px; }
.section-title h2::after { right: -70px; }

.section-title .divider {
    width: 80px;
    height: 4px;
    background: var(--gold-gradient);
    margin: 0 auto;
    border-radius: 2px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* 导航栏升级 */
.navbar {
    background: var(--red-gradient);
    color: white;
    height: 80px;
    position: sticky;
    top: 0;
    z-index: 2000;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    border-bottom: 3px solid var(--secondary-gold);
}

.nav-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding: 0 30px;
}

.nav-logo { 
    font-size: 1.8rem; 
    font-weight: 900; 
    letter-spacing: 3px; 
    color: var(--light-gold);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo i { font-size: 2rem; }

.nav-links { display: flex; height: 100%; list-style: none; }

.nav-item { position: relative; height: 100%; }

.nav-item > a {
    display: flex;
    align-items: center;
    padding: 0 20px;
    height: 100%;
    color: white;
    font-size: 1.1rem;
    font-weight: bold;
    transition: all 0.3s;
    text-decoration: none;
}

.nav-item:hover > a, .nav-item > a.active {
    background: rgba(0,0,0,0.1);
    color: var(--light-gold);
    border-bottom: 4px solid var(--light-gold);
}

.dropdown {
    position: absolute;
    top: 80px;
    left: 0;
    background: white;
    min-width: 220px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    display: none;
    border-top: 4px solid var(--secondary-gold);
    border-radius: 0 0 8px 8px;
    overflow: hidden;
}

.nav-item:hover .dropdown { display: block; animation: navFade 0.3s ease forwards; }

.dropdown a {
    display: block;
    padding: 15px 25px;
    color: var(--text-dark);
    text-decoration: none;
    border-bottom: 1px solid #F0F0F0;
    font-size: 1rem;
    transition: 0.3s;
}

.dropdown a:hover { 
    background: #FFF5F5; 
    color: var(--primary-red); 
    padding-left: 35px;
    border-left: 5px solid var(--primary-red);
}

@keyframes navFade { 
    from { opacity: 0; transform: translateY(20px); } 
    to { opacity: 1; transform: translateY(0); } 
}

/* 首页大轮播 Banner */
.hero-banner {
    height: 100vh;
    min-height: 600px;
    position: relative;
    overflow: hidden;
    background: #000;
}

.hero-slide {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: opacity 1s ease-in-out;
}

.hero-slide::after {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to bottom, rgba(139,0,0,0.3), rgba(0,0,0,0.7));
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 4.5rem;
    margin-bottom: 25px;
    letter-spacing: 8px;
    font-weight: 900;
    text-shadow: 0 5px 15px rgba(0,0,0,0.5);
    color: #fff;
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 40px;
    letter-spacing: 2px;
    color: var(--light-gold);
    font-weight: 500;
}

.hero-btn {
    display: inline-block;
    padding: 15px 40px;
    background: var(--red-gradient);
    color: white;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 50px;
    border: 2px solid var(--secondary-gold);
    transition: 0.3s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.hero-btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 25px rgba(200, 16, 46, 0.4);
    background: var(--gold-gradient);
    color: var(--primary-dark);
}

/* 通用卡片设计 */
.card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    border: 1px solid #F0F0F0;
    position: relative;
}

.card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 40px rgba(200, 16, 46, 0.12);
    border-color: var(--light-gold);
}

/* 人物卡片专场 */
.people-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.people-card {
    display: flex;
    flex-direction: column;
}

.people-img-wrapper {
    position: relative;
    height: 350px;
    overflow: hidden;
}

.people-img { 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
    transition: 0.6s;
}

.people-card:hover .people-img { transform: scale(1.1); }

.people-info { padding: 30px; border-top: 4px solid var(--primary-red); }
.people-info h3 { 
    color: var(--primary-red); 
    margin-bottom: 12px; 
    font-size: 1.8rem; 
    font-weight: 900;
}
.people-info .role { 
    color: var(--secondary-gold); 
    font-weight: bold; 
    margin-bottom: 20px; 
    display: block; 
    font-size: 1rem;
    border-bottom: 1px dashed var(--secondary-gold);
    padding-bottom: 10px;
}
.people-info p { 
    color: var(--text-mid); 
    font-size: 1rem; 
    line-height: 1.8; 
    text-align: justify;
}

/* 视频播放器弹窗样式 */
.video-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.9);
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.video-popup-container {
    width: 100%;
    max-width: 1000px;
    position: relative;
    background: #000;
    border: 3px solid var(--secondary-gold);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 0 50px rgba(212, 175, 55, 0.3);
}

.close-video {
    position: absolute;
    top: -45px; right: 0;
    color: white;
    font-size: 2.5rem;
    cursor: pointer;
    transition: 0.3s;
}

.close-video:hover { color: var(--secondary-gold); transform: rotate(90deg); }

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
}

.video-wrapper iframe {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
}

/* 页脚升级 */
.footer {
    background: var(--primary-dark);
    color: #F0F0F0;
    padding: 80px 0 30px;
    border-top: 5px solid var(--secondary-gold);
}

.footer h4 {
    color: var(--light-gold);
    font-size: 1.4rem;
    margin-bottom: 25px;
    font-weight: bold;
    position: relative;
}

.footer h4::after {
    content: '';
    position: absolute;
    bottom: -10px; left: 0;
    width: 40px; height: 2px;
    background: var(--secondary-gold);
}

.footer a { color: #BBB; text-decoration: none; transition: 0.3s; }
.footer a:hover { color: var(--light-gold); padding-left: 5px; }

.footer-bottom {
    text-align: center;
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
    color: #888;
}

/* 按钮与通用元素装饰 */
.btn-gold {
    background: var(--gold-gradient);
    color: var(--primary-dark);
    padding: 10px 25px;
    border-radius: 4px;
    font-weight: bold;
    text-decoration: none;
    display: inline-block;
    border: none;
    cursor: pointer;
    transition: 0.3s;
}

.btn-gold:hover { transform: scale(1.05); box-shadow: 0 5px 15px rgba(212, 175, 55, 0.4); }

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-content h1 { font-size: 2.8rem; letter-spacing: 4px; }
    .hero-content p { font-size: 1.1rem; }
    .section-title h2 { font-size: 2rem; }
    .navbar { height: 70px; }
    .nav-logo { font-size: 1.4rem; }
}