/* ================================
   恒星锰业企业网站 V2 - 仿天辰工程风格
   ================================ */

/* CSS 变量 */
:root {
    --primary-dark: #1a5276;
    --primary-blue: #2980b9;
    --secondary-blue: #2980b9;
    --accent-gold: #1a5276;
    --text-dark: #333;
    --text-gray: #666;
    --text-light: #999;
    --bg-white: #ffffff;
    --bg-light: #f5f7fa;
    --bg-dark: #1a5276;
    --border-color: #e0e0e0;
    --shadow: 0 2px 15px rgba(0,0,0,0.08);
    --shadow-hover: 0 5px 25px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
}

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

ul, ol {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
}

/* ================================
   顶部栏
   ================================ */
.top-bar {
    background: var(--bg-dark);
    color: #ccc;
    padding: 12px 0;
    font-size: 14px;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-info {
    display: flex;
    gap: 30px;
}

.top-info span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-lang {
    display: flex;
    gap: 10px;
}

.top-lang a {
    color: #ccc;
}

.top-lang a.active,
.top-lang a:hover {
    color: var(--accent-gold);
}

.top-lang span {
    color: #555;
}

/* ================================
   导航栏
   ================================ */
.navbar-v2 {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
	transition: var(--transition);
}

.navbar-v2 .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 10px;
}

.logo-v2 {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    width: 60px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-blue:#2980b9));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
    font-weight: bold;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-cn {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-dark);
    line-height: 1.2;
}

.logo-en {
    font-size: 11px;
    color: var(--text-gray);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav-menu-v2 {
    display: flex;
    gap: 30px;
}

.nav-menu-v2 a {
    color: var(--text-dark);
    font-size: 16px;
    font-weight: 500;
    padding: 10px 0;
    position: relative;
}

.nav-menu-v2 a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--secondary-blue);
    transition: var(--transition);
}

.nav-menu-v2 a:hover::after,
.nav-menu-v2 a.active::after {
    width: 100%;
}

.nav-menu-v2 a:hover,
.nav-menu-v2 a.active {
    color: var(--secondary-blue);
}

.nav-toggle-v2 {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle-v2 span {
    width: 25px;
    height: 3px;
    background: var(--primary-dark);
    border-radius: 2px;
}

/* ================================
   主 Banner
   ================================ */
.hero-banner {
    position: relative;
    background: linear-gradient(95deg, var(--primary-dark) 0%, var(--primary-blue) 100%);
    min-height: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;

}

.hero-slides {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 30px;
}

.hero-slide {
    width: 100%;
    max-width: 1400px;
    text-align: center;
    color: white;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: bold;
    margin-bottom: 20px;
    letter-spacing: 3px;
}

.hero-content p {
    font-size: 24px;
    opacity: 0.9;
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.hero-desc {
    font-size: 18px;
    opacity: 0.8;
    margin-bottom: 40px;
}

.hero-btn {
    display: inline-block;
    padding: 15px 45px;
    background: var(--accent-gold);
    color: var(--bg-dark);
    font-size: 16px;
    font-weight: 600;
    border-radius: 3px;
    transition: var(--transition);
}

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

.hero-nav {
    background: rgba(0,0,0,0.3);
    padding: 30px 0;
}

.hero-nav .container {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.hero-nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    color: rgba(255,255,255,0.6);
    cursor: pointer;
    transition: var(--transition);
}

.hero-nav-item:hover,
.hero-nav-item.active {
    color: white;
}

.hero-nav-num {
    font-size: 24px;
    font-weight: bold;
    font-family: 'Georgia', serif;
}

.hero-nav-title {
    font-size: 16px;
    letter-spacing: 2px;
}

/* ================================
   Section 通用样式
   ================================ */
.section {
    padding: 50px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: block;
    color: var(--secondary-blue);
    font-size: 14px;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 15px;
}

.section-title {
    font-size: 42px;
    color: var(--primary-dark);
    font-weight: bold;
    margin-bottom: 20px;
}

.section-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-blue), var(--accent-gold));
    margin: 0 auto;
}

/* ================================
   关于我们
   ================================ */
.about-section {
    background: var(--bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-intro {
    font-size: 18px;
    line-height: 1.9;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-weight: 500;
}

.about-text p {
    color: var(--text-gray);
    line-height: 1.9;
    margin-bottom: 20px;
}
    .transparent-btn {
      display: inline-block;
      font-size: 16px;
      padding: 44px 70px; /* 大小：上下12，左右28 */
      background-color: rgba(255, 255, 255, 0);
      border: 1px solid rgba(255, 255, 255,0);
      border-radius: 8px;
      color: #fff;
      text-decoration: none;
      transition: all 0.3s ease;
      backdrop-filter: blur(0.5px);
    }
    .transparent-btn:hover {
      background-color: rgba(255, 255, 255, 0.25);
      border-color: rgba(255, 255, 255, 0.5);
    }
	
.btn-more {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--secondary-blue);
    font-weight: 600;
    margin-top: 20px;
    padding: 12px 25px;
    border: 2px solid var(--secondary-blue);
    border-radius: 3px;
    transition: var(--transition);
}

.btn-more:hover {
    background: var(--secondary-blue);
    color: white;
}

.btn-more .arrow {
    transition: var(--transition);
}

.btn-more:hover .arrow {
    transform: translateX(5px);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.stat-box {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    color: white;
    transition: var(--transition);
}

.stat-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.stat-num {
    display: block;
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 10px;
    font-family: 'Georgia', serif;
}

.stat-unit {
    font-size: 15px;
    opacity: 0.9;
    letter-spacing: 1px;
}

/* ================================
   主营业务
   ================================ */
.business-section {
    background: var(--bg-light);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.business-card {
    background: var(--bg-white);
    padding: 25px 25px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--secondary-blue);
    transform: scaleX(0);
    transition: var(--transition);
}

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

.business-card.featured {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
    color: white;
    transform: scale(1.05);
    z-index: 1;
}

.business-card.featured h3,
.business-card.featured h4,
.business-card.featured p,
.business-card.featured ul li {
    color: white;
}

.business-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.business-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.business-icon {
    font-size: 40px;
    margin-bottom: 5px;
}

.business-card h3 {
    font-size: 24px;
    color: var(--primary-dark);
    margin-bottom: 5px;
}

.business-card h4 {
    font-size: 14px;
    color: var(--secondary-blue);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.business-card p {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 10px;
}

.business-card ul {
    border-top: 1px solid var(--border-color);
    padding-top: 5px;
}

.business-card ul li {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 2;
}

.business-card.featured ul {
    border-color: rgba(255,255,255,0.2);
}

/* ================================
   产品中心 V2
   ================================ */
.products-section {
    background: var(--bg-white);
}

.products-grid-v2 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
    margin-bottom: 50px;
}

.product-card-v2 {
    background: var(--bg-light);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.product-card-v2:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.product-img {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-blue));
	color: #4CAF50;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
}

.product-card-v2 h3 {
    padding: 25px 25px 10px;
    font-size: 22px;
    color: var(--primary-dark);
}

.product-card-v2 p {
    padding: 0 25px 20px;
    color: var(--text-gray);
    font-size: 14px;
}

.product-link {
    display: block;
    margin: 0 25px 25px;
    padding: 12px;
    background: var(--secondary-blue);
    color: white;
    text-align: center;
    border-radius: 5px;
    font-weight: 500;
    transition: var(--transition);
}

.product-link:hover {
    background: var(--primary-dark);
}

.center-btn {
    text-align: center;
}

.btn-primary-v2 {
    display: inline-block;
    padding: 15px 50px;
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-blue));
    color: white;
    font-size: 16px;
    font-weight: 600;
    border-radius: 5px;
    transition: var(--transition);
}

.btn-primary-v2:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.btn-outline-v2 {
    display: inline-block;
    padding: 15px 50px;
    border: 2px solid var(--secondary-blue);
    color: var(--secondary-blue);
    font-size: 16px;
    font-weight: 600;
    border-radius: 5px;
    transition: var(--transition);
}

.btn-outline-v2:hover {
    background: var(--secondary-blue);
    color: white;
}

/* ================================
   全球布局
   ================================ */
.global-section {
    background: linear-gradient(135deg, var(--bg-dark), #2c3e50);
    color: white;
}

.global-section .section-tag {
    color: var(--accent-gold);
}

.global-section .section-title {
    color: white;
}

.global-grid {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-bottom: 60px;
}

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

.global-num {
    display: block;
    font-size: 64px;
    font-weight: bold;
    color: var(--accent-gold);
    font-family: 'Georgia', serif;
    line-height: 1;
    margin-bottom: 15px;
}

.global-label {
    font-size: 16px;
    opacity: 0.8;
    letter-spacing: 1px;
}

.global-regions {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.region-card {
    background: rgba(255,255,255,0.1);
    padding: 25px 20px;
    border-radius: 8px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(255,255,255,0.1);
}

.region-card:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-5px);
}

.region-icon {
    font-size: 40px;
    display: block;
    margin-bottom: 15px;
}

.region-card h4 {
    font-size: 16px;
    margin-bottom: 8px;
}

.region-card p {
    font-size: 13px;
    opacity: 0.7;
}

/* ================================
   新闻中心 V2
   ================================ */
.news-section {
    background: var(--bg-light);
}

.news-grid-v2 {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 30px;
    margin-bottom: 50px;
}

.news-card-v2 {
    background: var(--bg-white);
    padding: 35px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-card-v2:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.news-card-v2.featured {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-blue));
    color: white;
}

.news-card-v2.featured .news-date {
    color: rgba(255,255,255,0.7);
}

.news-card-v2.featured h3 {
    color: white;
}

.news-card-v2.featured p {
    color: rgba(255,255,255,0.9);
}

.news-card-v2.featured .news-link {
    color: var(--accent-gold);
}

.news-date {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.news-card-v2 h3 {
    font-size: 20px;
    color: var(--primary-dark);
    margin-bottom: 15px;
    line-height: 1.4;
}

.news-card-v2 p {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    color: var(--secondary-blue);
    font-weight: 600;
    font-size: 14px;
}

/* ================================
   合作伙伴
   ================================ */
.partners-section {
    background: var(--bg-white);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;
    align-items: center;
}

.partner-logo {
    background: var(--bg-light);
    padding: 30px 20px;
    border-radius: 8px;
    text-align: center;
    color: var(--text-gray);
    font-weight: 600;
    font-size: 15px;
    transition: var(--transition);
}

.partner-logo:hover {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    color: var(--primary-dark);
}

/* ================================
   页脚 V2
   ================================ */
.footer-v2 {
    background: var(--bg-dark);
    color: #ccc;
    padding: 60px 0 20px;
}

.footer-content-v2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section-v2 h3 {
    color: white;
    font-size: 22px;
    margin-bottom: 15px;
}

.footer-section-v2 h4 {
    color: white;
    font-size: 18px;
    margin-bottom: 20px;
}

.footer-section-v2 p {
    line-height: 1.8;
    margin-bottom: 8px;
}

.footer-section-v2 ul li {
    margin-bottom: 12px;
}

.footer-section-v2 ul li a {
    color: #ccc;
    transition: var(--transition);
}

.footer-section-v2 ul li a:hover {
    color: var(--accent-gold);
    padding-left: 5px;
}

.footer-bottom-v2 {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    text-align: center;
    font-size: 14px;
}

.footer-bottom-v2 p {
    margin-bottom: 8px;
    opacity: 0.7;
}

/* ================================
   响应式设计
   ================================ */
@media (max-width: 1200px) {
    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .business-card.featured {
        transform: none;
    }
    
    .business-card.featured:hover {
        transform: translateY(-10px);
    }
    
    .global-regions {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-content-v2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .nav-menu-v2 {
        gap: 25px;
    }
    
    .nav-menu-v2 a {
        font-size: 14px;
    }
    
    .hero-content h1 {
        font-size: 42px;
    }
    
    .hero-nav .container {
        gap: 30px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .products-grid-v2 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid-v2 {
        grid-template-columns: 1fr;
    }
    
    .global-grid {
        gap: 40px;
    }
    
    .global-regions {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .top-bar {
        display: none;
    }
    
    .nav-toggle-v2 {
        display: flex;
    }
    
    .nav-menu-v2 {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: var(--shadow);
        display: none;
    }
    
    .nav-menu-v2.active {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-content p {
        font-size: 18px;
    }
    
    .hero-nav {
        display: none;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid-v2 {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .global-grid {
        flex-direction: column;
        gap: 30px;
    }
    
    .global-regions {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content-v2 {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }
    
    .logo-cn {
        font-size: 20px;
    }
    
    .logo-en {
        font-size: 10px;
    }
    
    .stat-num {
        font-size: 36px;
    }
    
    .global-num {
        font-size: 48px;
    }
    
    .partners-grid {
        grid-template-columns: 1fr;
    }
}