@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;800&display=swap');

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
}

html {
    scroll-snap-type: y mandatory;
}

body {
    /* 背景图片：请将图片放在 assets/images/background.jpg */
    background: url('assets/images/background.jpg.jpg') no-repeat center center fixed;
    background-size: cover;
    position: relative;
    height: 100%;
    overflow: hidden;
    font-family: 'Poppins', sans-serif;
}

body.loaded {
    overflow: auto;
}

.webgl {
    position: fixed;
    top: 0;
    left: 0;
    outline: none;
}

section {
    height: 100vh;
    width: 100vw;
    scroll-snap-align: start;
    position: relative;
}

section .container {
    max-width: 1360px;
    width: 100%;
    height: 100%;
    margin: 0 auto;
    padding: 0 15px;

    display: grid;
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
    justify-content: flex-start;
}

section.one .container {
    grid-template-areas: 'content ..'
}

section.two .container {
    grid-template-areas: '.. content'
}

.hero {
    width: 100%;
    height: 100%;
    margin-bottom: 50px;

    grid-area: content;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    flex-direction: column;
    color: #fff; /* 文字颜色改为白色，适应深色背景 */
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

h1 {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 90px;
    line-height: 100px;
    font-weight: 700;
    height: 100px;
    width: 100%;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-shadow: 2px 2px 5px rgba(0,0,0,0.7);
}

h2 {
    font-size: 60px;
    font-weight: 600;
    line-height: 70px;
    font-family: inherit;
    display: block;
    width: 100%;
}

h3 {
    font-size: 50px;
    font-weight: 400;
    line-height: 60px;
    margin-bottom: 30px;
    display: block;
    width: 100%;
}

p {
    font-size: 16px;
    line-height: 26px;
    font-weight: 300;
    display: block;
    width: 100%;
}

.loading-bar {
    position: fixed;
    top: 50%;
    width: 100%;
    height: 2px;
    z-index: 99;
    background: #ffffff;
    transform: scaleX(0);
    transition: transform 0.5s;
    transform-origin: top left;
}

.loading-bar.ended {
    transform: scaleX(0);
    transform-origin: 100% 0;
    transition: transform 1.5s ease-in-out;
}