/* Global Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, Oxygen, sans-serif;
}
html {
    scroll-behavior: smooth;
}
body {
    background-color: #FAFAFA;
    color: #333;
    line-height: 1.7;
}
a {
    text-decoration: none;
    color: inherit;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}
/* Navigation Bar */
nav {
    width: 100%;
    position: fixed;
    top: 0;
    z-index: 999;
    background: rgba(26, 26, 26, 0.85);
    backdrop-filter: blur(6px);
    padding: 20px 0;
}
.nav-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 24px;
    font-weight: 700;
    color: #E65100;
    letter-spacing: 1px;
}
.nav-links a {
    color: #fff;
    margin-left: 40px;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.25s ease;
}
.nav-links a:hover {
    color: #E65100;
}
/* Video Banner Hero Section */
.hero-banner {
    width: 100%;
    height: 90vh;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 72px;
}
.hero-video {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}
.hero-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.22);
    z-index: 2;
}
.hero-text {
    position: relative;
    z-index: 3;
    text-align: center;
    color: white;
}
.hero-text h1 {
    font-size: 64px;
    line-height: 1.1;
    margin-bottom: 16px;
}
.hero-text p {
    font-size: 20px;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}
/* General Section Spacing */
section {
    padding: 100px 0;
}
.section-heading {
    font-size: 36px;
    text-align: center;
    margin-bottom: 60px;
    color: #1A1A1A;
    position: relative;
}
.section-heading::after {
    content: "";
    width: 80px;
    height: 4px;
    background: #E65100;
    display: block;
    margin: 12px auto 0;
}
/* Home 3 Image Grid */
.image-three-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 36px;
}
.image-card {
    background: white;
    overflow: hidden;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
.image-card img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    display: block;
}
.image-card .caption {
    padding: 24px;
}
.image-card h3 {
    font-size: 20px;
    margin-bottom: 8px;
    color: #1A1A1A;
}
.image-card p {
    color: #555;
    font-size: 15px;
}
/* Home 6 Video Thumbnail Grid */
.video-six-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.video-card {
    background: white;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
.video-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}
.video-card .caption {
    padding: 20px;
}
.video-card h4 {
    font-size: 18px;
    margin-bottom: 6px;
}
.video-card span {
    color: #E65100;
    font-size: 14px;
    font-weight: 600;
}
/* About Page Styling */
.about-wrap {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}
.about-img-box img {
    width: 100%;
    border-radius: 6px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}
.about-statement h2 {
    font-size: 32px;
    margin-bottom: 24px;
}
.about-statement p {
    font-size: 17px;
    color: #444;
    margin-bottom: 16px;
}
.about-four-img-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.about-four-img-grid img {
    width: 100%;
	height: 320px;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
/* Blog Page 4 Article Grid */
.blog-four-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}
.blog-card {
    background: white;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
.blog-card img {
    width: 100%;
    height: 320px;
    object-fit: cover;
}
.blog-card .blog-text {
    padding: 28px;
}
.blog-card .tag {
    color: #E65100;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
}
.blog-card h3 {
    font-size: 24px;
    margin: 8px 0 12px;
}
.blog-card p {
    color: #555;
}
/* Footer */
footer {
    background: #1A1A1A;
    color: #ccc;
    text-align: center;
    padding: 40px 0;
    font-size: 14px;
}
/* Mobile Responsive */
@media(max-width:992px){
    .image-three-grid, .video-six-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-wrap {
        grid-template-columns: 1fr;
    }
    .hero-text h1 {
        font-size: 46px;
    }
    /* 4列图片平板自动2列 */
    div[style*="grid-template-columns:repeat(4,1fr)"]{
        grid-template-columns: repeat(2, 1fr) !important;
    }
}
@media(max-width:640px){
    .image-three-grid, .video-six-grid, .blog-four-grid {
        grid-template-columns: 1fr;
    }
    .nav-links a {
        margin-left: 20px;
    }
    .hero-text h1 {
        font-size: 36px;
    }
    /* 4列图片手机自动单列 */
    div[style*="grid-template-columns:repeat(4,1fr)"]{
        grid-template-columns: 1fr !important;
    }
}




/* 教练4图网格：自定义间距+图片高度 */
.coach-four-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px; /* 自定义卡片间距 */
}
/* 仅本组图片高度，不影响页面三图、视频卡片 */
.coach-four-grid .image-card img {
    height: 170px;
}
/* 平板、手机自适应 */
@media(max-width:992px){
    .coach-four-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media(max-width:640px){
    .coach-four-grid {
        grid-template-columns: 1fr;
    }
}