/* 引入 Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&display=swap');

/* Base Styles and Common Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    /* font-family: "Noto Serif JP", serif; */
    font-family: 'Noto Sans JP', sans-serif;
    /* font-family: 'Zen Kaku Gothic New', 'Noto Sans JP', 'M PLUS Rounded 1c', sans-serif; */
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    overflow-x: hidden;
}

html {
    overflow-x: hidden;
}

/* Container Styles */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Video Fallback Styles */
.video-fallback {
    width: 560px;
    height: 315px;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.fallback-content {
    text-align: center;
    color: #666;
    padding: 2rem;
}

.fallback-content p {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.fallback-content p:last-child {
    margin-bottom: 0;
    font-size: 0.8rem;
    color: #999;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 2rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: 1rem;
    font-size: 1rem;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn_primary {
    display: none;
}

.btn_secondary {
    background-color: transparent;
    color: #007bff;
    border: 2px solid #007bff;
}

.btn_secondary:hover {
    background-color: #007bff;
    color: white;
}

.btn_large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Section Styles */
section {
    padding: 4rem 0;
    /* min-height: 100vh; */
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.section_header {
    text-align: center;
    margin-bottom: 3rem;
}

.section_title {
    display: inline-grid;
    position: relative;
    color: #333;
    background-color: #ffffff;
    margin-bottom: 1rem;
}

.section_subtitle {
    font-size: 1.5rem;
    font-weight: bold;
    max-width: 600px;
    margin: 0 auto;
}

.container_title {
    display: grid;
    margin-top: -3rem;
    margin-bottom: 4rem;
    justify-items: start;
    justify-content: center;
}

/* Header Styles */
.header {
    background-color: transparent;
    position: absolute;
    width: 100%;
    z-index: 1000;
    transition: background-color 0.3s ease;
}

.header.scrolled {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header .container, .fv .container {
    max-width: 100%;
}

.header_content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 3%;
}

.logo img {
    height: 35px;
    width: auto;
}

.nav_list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav_link {
    text-decoration: none;
    color: white;
    font-weight: bold;
    transition: color 0.3s ease;
}

.nav_link:hover {
    color: #007bff;
}

/* FV Section */
.fv {
    position: relative;
    overflow: hidden;
    padding: 0;
    max-height: 90vh;
}

.fv_image {
    width: 100%;
    object-fit: cover;
}

.fv_buttons {
    position: absolute;
    top: 75%;
    left: 70%;
}

.fv_buttons img {
    /* width: 65%; */
    width: calc(10% + 20vw);
    transition: all 0.3s ease;
}

.fv_buttons img:hover {
    opacity: 0.7;
    transform: scale(1.1);
}

/* FV Carousel Styles */
.fv_carousel {
    width: 100%;
    overflow: hidden;
    padding: 0;
    margin: 0;
}

.carousel_container {
    width: 100%;
    overflow: hidden;
    padding: 0;
    margin: 0;
}

.js-marquee {
    display: flex;
}

.marquee {
    white-space: nowrap;
    overflow: hidden;
}


.course_image {
    height: 10vh;
    width: auto;
    margin-right: 30px;
    display: inline-block;
    vertical-align: middle;
}




/* About Section */
.about {
    position: relative;
    z-index: 10;
}

.about_image {
    display: flex;
    gap: 5rem;
    justify-content: center;
    justify-items: center;
}

.about_image img {
    width: 20%;
}

/* Propose Section */
.propose .container {
    width: 62%;
}

.propose_box {
    display: grid;
    border: 1px solid;
    justify-items: center;
    width: 100%;
    margin: -10% auto 0 auto;
    padding: 60px 5%;
    font-size: 1rem;
    font-weight: bold;
}

.propose_grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    width: 100%;
}

.propose_content {
    margin-bottom: 30px;
}

.propose_content p {
    margin-bottom: unset;
    font-size: 1.1rem;
}

.propose_item {
    display: flex;
    align-items: center;
    padding: 1.5rem 1rem;
    background-color: white;
    transition: transform 0.3s ease;
    justify-content: center;
}

.item_left {
    flex: 1;
    color: #333;
    text-align: left;
    max-width: 18vw;
}

.item_right {
    background-color: #666;
    color: white;
    padding: 0.5rem 1rem;
    white-space: nowrap;
    margin-left: 1rem;
    width: 50%;
    min-width: 240px;
}

.item_right b {
    font-size: 1.4rem;
}

.propose_item:nth-child(1) .item_right {
    background-color: #666;
}

.propose_item:nth-child(2) .item_right {
    background: linear-gradient(to right, #666 90%, #e74c3c00 20%);
}

.propose_item:nth-child(3) .item_right {
    background: linear-gradient(to right, #666 83%, #e74c3c00 30%);
}

/* Flow1 Section */
.flow1 {
    padding: 4rem 0;
}

.red {
    color: red;
}

.flow_subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: #666;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.flow1_steps {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 4rem;
    margin-bottom: 4rem;
    position: relative;
}

.flow1_step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    flex: 1;
    max-width: 300px;
}

.flow1_step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 115px;
    right: -8rem;
    width: 15rem;
    height: 1px;
    background-color: #000000;
    z-index: 1;
    max-width: calc(100vw - 100%);
    overflow: hidden;
}

.flow1_icon {
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 2;
}

.flow1_icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.flow1_content {
    background-color: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 2;
}

.flow1_title {
    color: #333;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.flow1_description {
    color: #666;
    line-height: 1.6;
    font-size: 0.875rem;
}

/* Flow Documents Section */
.flow_documents {
    margin-top: 4rem;
    display: grid;
}

.documents_intro {
    text-align: center;
    margin-bottom: 2rem;
}

.documents_intro p {
    font-size: 2rem;
    font-weight: bold;
    color: #333;
}

.documents_content {
    display: flex;
    align-items: center;
    gap: 3rem;
    margin: 0 auto;
}

.documents_image {
    flex: 1;
}

.documents_image img {
    width: 100%;
    height: auto;
}

.documents_list {
    flex: 1;
    /* line-height: 70px; */
    line-height: 8vh;
}

.documents_list ol {
    list-style: none;
    counter-reset: item;
    padding: 0;
}

.documents_list li {
    counter-increment: item;
    margin-bottom: 1rem;
    padding-left: 3.5rem;
    position: relative;
    font-size: 2rem;
    color: #333;
}

.documents_list li::before {
    content: counter(item, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: 0;
    width: 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
}

/* Banner Styles */
.banner {
    background-image: url('../images/banner_background_pc.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: white;
    text-align: center;
    position: relative;
    min-height: 335px;
    display: flex;
    align-items: center;
}

.banner_content {
    max-width: 800px;
    margin: 0 auto;
}

.banner_title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: white;
}

.banner_subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Banner Button Box Styles for PC */
.banner .container {
    font-size: 2.5rem;
    display: grid;
}

.banner .container span span {
    text-decoration: underline;
    text-decoration-color: #FFFF21;
    text-decoration-thickness: 3px;
    text-underline-offset: 4px;
}

.banner_btn_box {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 2rem;
}

.banner_btn_box img {
    transition: all 0.3s ease;
    cursor: pointer;
    height: auto;
    width: 70%;
}

.banner_btn_box img:hover {
    opacity: 0.7;
    transform: scale(1.05);
}

/* Features Section */
.features_grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.features {
    min-height: auto;
    padding: 4rem 0;
}

.feature_item {
    position: relative;
    background-color: white;
    border-radius: 15px;
    padding: 3rem;
    margin-top: 2rem;
    border: 1px solid #000000;
}

.module-number {
    position: absolute;
    left: 0;
    top: 0;
    background: #3e3a39;
    border-radius: 0.5rem;
    color: white;
    padding: 8px 16px;
    text-align: center;
    z-index: 10;
}

.module-number p:first-child {
    font-size: 12px;
    margin: 0;
    line-height: 1;
}

.module-number p:last-child {
    font-weight: bold;
    font-size: 3rem;
    line-height: 1;
    margin: 5px 0 0 0;
}

.feature_content {
    display: flex;
    /* align-items: center; */
    /* align-items: flex-end; */
    gap: 2rem;
}

.feature_text {
    flex: 1;
}

.feature_title {
    color: #333;
    font-size: 1.6rem;
    font-weight: bold;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.feature_description {
    color: #333;
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: bold;
}

/* Remove margin-bottom from first p tag in second feature_item */
.feature_item:nth-child(2) .feature_text p.feature_description {
    margin-bottom: 0;
}

.feature_description_small {
    color: #333;
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    font-weight: bold;
}

.feature_list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature_list li {
    color: #333;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
    line-height: 1.5;
    font-weight: bold;
}

.feature_icon {
    flex-shrink: 0;
}

.feature_icon img {
    height: auto;
}

.feature_stats {
    display: flex;
    justify-content: space-between;
    margin-top: 1.5rem;
    gap: 1rem;
}

.stat_item {
    text-align: center;
    flex: 1;
    position: relative;
}

.stat_item img {
    max-width: 200px;
}

.stat_label {
    font-size: 0.8rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.stat_value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #333;
}

/* Feature 02 specific styling - no image */
.feature_item:nth-child(2) .feature_title, .feature_item:nth-child(1) .feature_title, .feature_item:nth-child(3) .feature_title {
    margin-left: 75px;
}

/* Feature 03 specific styling - image on left */
.feature_item:nth-child(3) .feature_content {
    flex-direction: row;
    margin-top: 15px;
}

.feature_item:nth-child(3) .feature_icon {
    order: 1;
}

.feature_item:nth-child(3) .feature_text {
    order: 2;
}

/* Solution Section */
.solution {
    padding: 4rem 0;
}

.solution_points {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 85%;
}

.solution_point {
    background-color: white;
    padding: 2rem;
    border: 2px solid #000000;
    transition: transform 0.3s ease;
    position: relative;
}

.solution_point:hover {
    transform: translateY(-5px);
}

.solution_point .font_num {
    background-color: white;
    color: #000000;
    padding: 2px 5px;
}

.point_label {
    position: absolute;
    background-color: #666;
    color: white;
    padding: 0.5rem 1rem;
    font-size: 1.8rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 1rem;
    display: inline-block;
    left: -10px;
    top: -10px;
}

.point_english_subtitle {
    color: #999;
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    margin-top: -25px;
    text-align: right;
}

.point_title {
    color: #333;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.point_description {
    color: #333;
    line-height: 1.6;
    font-size: 1.2rem;
    font-weight: bold;
}

/* Genre Section */
.genre_grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 3rem;
    justify-items: center;
    align-items: center;
    justify-content: center;
}

.genre_grid img {
    height: 95%;
}

.genre_item {
    text-align: center;
    padding: 2rem;
    background-color: white;
    border-radius: 1rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.genre_item:hover {
    transform: translateY(-5px);
}

.genre_icon img {
    width: 4rem;
    height: 4rem;
    margin-bottom: 1.5rem;
}

.genre_title {
    color: #333;
    margin-bottom: 1rem;
}

.genre_description {
    color: #666;
    line-height: 1.6;
}

/* Actual Results Section */
.actual_results {
    padding: 4rem 0;
    min-height: auto;
}

.works_lists {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.list {
    background-color: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.list:hover {
    transform: translateY(-5px);
}

.video {
    position: relative;
    padding: 25px 25px 0px 25px;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.video iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.title {
    padding: 25px;
    font-size: 1rem;
    font-weight: 600;
    color: #2196F3;
}

.tags {
    padding: 0rem 1rem 1rem 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tags span {
    background-color: #f8f9fa;
    color: #666;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Price Section */
.price_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

/* Price table image styles for PC */
.price_box {
    width: 100%;
    overflow-x: auto;
}

.price img {
    display: block;
    margin: 0 auto;
    max-width: 1200px;
    width: 85%;
    height: auto;
}

/* Flow2 Section */
.flow2 {
    padding: 4rem 0;
    min-height: auto;
}

.flow2_title {
    font-size: 1.6rem;
}

.flow2_steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5rem 3rem;
    max-width: 1280px;
    margin: 0 auto;
}

.flow2_icon {
    height: 6rem;
}

.flow2_step {
    position: relative;
    text-align: center;
    padding: 4rem 1rem 1rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    border-radius: 10px;
    border: 2px solid #C1BEE3;
    box-shadow: 1px 1px 4px 1px gainsboro;
}

.flow2_step:not(:last-child, :nth-child(4))::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -2.5rem;
    transform: translateY(-50%) rotate(30deg);
    width: 30px;
    height: 30px;
    background: url(../images/triangle.png);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    z-index: 10;
    max-width: calc(100vw - 100%);
}

.flow2_content {
    flex: 1;
}

.flow2_step_label {
    position: absolute;
    background-color: #5C5C5C;
    color: white;
    padding: 1rem 1rem;
    font-size: 0.875rem;
    font-weight: bold;
    margin-bottom: 1rem;
    top: -45px;
    width: 80px;
    border-radius: 100%;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.flow2_step_label span {
    font-size: 1.2rem;
    font-weight: bold;
}

.flow2_icon img {
    width: 70%;
    /* height: 4rem; */
    margin-bottom: 1.5rem;
}

.flow2_title {
    color: #333;
    margin-bottom: 1rem;
}

.flow2_description {
    line-height: 1.6;
    font-weight: bold;
}

.flow2_step_special {
    background-color: #354C9F;
    color: white;
    border-radius: 8px;
}

.flow2_step_special .flow2_title {
    color: white;
}

.flow2_step_special .flow2_description {
    color: white;
}

.flow2_step_special .flow2_step_label {
    color: white;
}

/* Q&A Section */
.qa {
    min-height: auto;
    padding: 4rem 0;
}

.qa_list {
    max-width: 800px;
    margin: 0 auto;
}

.qa_item {
    background-color: white;
    border: 2px solid #294E80;
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

.qa_item:hover {
    border-color: #4682B4;
}

.qa_item dt {
    padding: 0.5rem 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: background-color 0.3s ease;
}

.qa_item dt:hover {
    background-color: #f8f9fa;
}

.qa_item_q {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;

    font-family: Arial, Helvetica, sans-serif;
    border-radius: 40px;
    text-align: center;
    /* line-height: 70px; */
    font-size: 2rem;
    color: #0095E0;
}

.qa_item_text {
    color: #0095E0;
    font-weight: bold;
    font-size: 1.2rem;
    flex: 1;
    margin: 0;
}

.qa_item_mark {
    color: #007bff;
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.qa_item.active .qa_item_mark {
    transform: rotate(0deg);
}

.qa_item dd {
    padding: 0 1.5rem 1.5rem;
    margin: 0;
    display: none !important;
    border-top: 1px solid #e5e7eb;
    border: 2px solid #ddd;
    border-radius: 0px 0px 8px 8px;
}

.qa_item.active {
    border: none;
    border-radius: unset;
}

.qa_item.active dt {
    border: 2px solid #294E80;
    border-radius: 8px 8px 0 0;
}

.qa_item.active dd {
    display: flex !important;
    align-items: center;
    gap: 1rem;
}

.qa_item_a {
    font-family: Arial, Helvetica, sans-serif;
    border-radius: 40px;
    text-align: center;
    line-height: 70px;
    color: #ddd;
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.qa_item dd div {
    color: #374151;
    line-height: 1.6;
    font-size: 0.95rem;
    margin-left: 0;
}

/* Promise Section Styles */
.triangle-img {
    display: block;
    margin: 2rem auto;
    width: auto;
    height: auto;
}

.promise-text {
    background-color: #0C2497;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    padding: 1rem 2rem;
    text-align: center;
    box-sizing: border-box;
    overflow-x: hidden;
}

.promise-text span {
    color: rgba(255, 255, 255, 0.99);
    font-size: 1.2rem;
    font-weight: 500;
    display: inline-block;
}

.promise-text span b {
    font-size: 1.7rem;
    font-family: sans-serif;
    font-weight: bold;
    color: white;
}

/* Footer */
.footer {
    background-color: #3E3A39;
    color: white;
    padding: 3rem 0 2rem;
}

.footer_content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 2rem;
}

.footer_logo img {
    height: 2.5rem;
    width: auto;
    margin-bottom: 1rem;
}

.footer_links {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer_link {
    color: white;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
}


.footer_copyright {
    color: white;
    margin: 0;
    font-size: 0.9rem;
}

/* Responsive Design for PC */
@media (max-width: 1400px) {
    section {
        padding: 2rem 0;
    }

    /* 增大section_header和container_title的间距 */
    .section_header {
        margin-bottom: 3rem;
    }

    .container_title {
        margin-bottom: 3rem;
    }

    /* 字号缩小 */
    html {
        font-size: 15px;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    h3 {
        font-size: 1.75rem;
    }

    h4 {
        font-size: 1.25rem;
    }

    p {
        font-size: 0.9rem;
    }

    .section_title {
        font-size: 1.8rem;
    }

    .section_subtitle {
        font-size: 1.3rem;
    }

    /* 宽度和高度缩小 */
    .container {
        max-width: 1100px;
        padding: 0 1.5rem;
    }

    .about_image img {
        width: 18%;
    }

    /* .propose_box {
        width: 75%;
        padding: 30px 8px;
    } */

    /* 减少间距 */
    .flow1_steps {
        gap: 2rem;
    }

    .flow1_step {
        max-width: 280px;
    }

    .feature_item {
        padding: 2rem 2.5rem;
    }

    .feature_item:nth-child(2) .feature_title, .feature_item:nth-child(1) .feature_title, .feature_item:nth-child(3) .feature_title {
        margin: 1rem 90px 2rem 90px;
    }

    .solution_points {
        gap: 2rem;
    }

    .point_english_subtitle {
        margin-top: -5px;
    }

    .solution_point {
        padding: 1rem 1.5rem;
    }

    .point_title {
        font-size: 2.2rem;
    }

    .point_description {
        font-size: 1rem;
    }

    /* 缩小图片 */
    /* .genre_grid {
        gap: 1rem 0;
    } */

    .genre_grid img {
        height: 80px;
    }

    .price img {
        width: 80%;
    }

    .works_lists {
        gap: 1rem;
    }

    .video {
        height: 220px;
    }

    .flow2 .container {
        max-width: 80%;
    }

    .flow2_step_label {
        padding: 0.6rem 0.7rem;
        width: 70px;
    }

    .flow2_icon img {
        width: 55%;
    }

    .flow2_steps {
        gap: 3.5rem 2.5rem;
    }

    .flow2_step {
        padding: 2rem 0.75rem 0.75rem 0.75rem;
    }

    .qa_item dt {
        padding: 1rem;
    }

    .qa_item_text {
        font-size: 1.1rem;
    }
}

@media (max-width: 1200px) {
    .container {
        padding: 0 1.5rem;
    }

    section {
        padding: 1.5rem 0;
    }

    .fv_title {
        font-size: 3rem;
    }

    .section_title {
        font-size: 2rem;
    }

    /* 增大section_header和container_title的间距 */
    .section_header {
        margin-bottom: 2.5rem;
    }

    .container_title {
        margin-bottom: 2.5rem;
    }

    /* 字号进一步缩小 */
    html {
        font-size: 14px;
    }

    h1 {
        font-size: 2.25rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.4rem;
    }

    h4 {
        font-size: 1.125rem;
    }

    p {
        font-size: 0.85rem;
    }

    .logo img {
        height: 30px;
    }

    .section_title {
        font-size: 1.6rem;
    }

    .section_subtitle {
        font-size: 1.2rem;
    }

    /* 宽度和高度进一步缩小 */
    .container {
        max-width: 1000px;
        padding: 0 1.25rem;
    }

    .about_image img {
        width: 16%;
    }

    .propose_box {
        width: 95%;
        padding: 30px 5%;
        margin: -10% auto 0 auto;
    }

    /* 减少间距 */
    .flow1_steps {
        gap: 1.5rem;
    }

    .flow1_step {
        max-width: 260px;
    }

    .feature_item {
        padding: 1.5rem 2rem;
    }

    .feature_item:nth-child(2) .feature_title, .feature_item:nth-child(1) .feature_title, .feature_item:nth-child(3) .feature_title {
        margin: 1rem 90px 3rem 90px;
    }

    .solution_points {
        gap: 1.75rem;
        width: unset;
    }

    .point_english_subtitle {
        margin-top: -10px;
    }

    .solution_point {
        padding: 0.75rem 1.25rem;
    }

    .point_title {
        font-size: 2rem;
    }

    .point_description {
        font-size: 0.9rem;
    }

    /* 缩小图片 */
    /* .genre_grid {
        gap: 2rem;
    } */

    .genre_grid img {
        height: 70px;
    }

    .price img {
        width: 75%;
    }

    .works_lists {
        gap: 0.75rem;
    }

    .video {
        height: 200px;
    }

    .flow2 .container {
        max-width: 82%;
    }

    h3.flow2_title {
        font-size: 1.3rem;
    }

    .flow2_step_label {
        padding: 0.5rem 0.6rem;
        width: 66px;
    }

    .flow2_icon img {
        width: 53%;
    }

    .flow2_steps {
        gap: 4rem 3rem;
    }

    .flow2_step {
        padding: 1.5rem 0.5rem 0.5rem 0.5rem;
    }

    .qa_item dt {
        padding: 0.75rem;
    }

    .qa_item_text {
        font-size: 1rem;
    }
}

@media (max-width: 992px) {
    section {
        padding: 1rem 0;
    }

    /* 增大section_header和container_title的间距 */
    .section_header {
        margin-bottom: 2rem;
    }

    .container_title {
        margin-bottom: 2rem;
    }

    /* 字号紧凑布局 */
    html {
        font-size: 13px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    h4 {
        font-size: 1rem;
    }

    p {
        font-size: 0.8rem;
    }
    .logo img {
        height: 25px;
    }
    .section_title {
        font-size: 1.4rem;
    }

    .section_subtitle {
        font-size: 1.1rem;
    }

    /* 宽度和高度紧凑布局 */
    .container {
        max-width: 900px;
        padding: 0 1rem;
    }

    .about_image img {
        width: 14%;
    }

    .propose_box {
        width: 100%;
        padding: 30px 5%;
        margin: -9% auto 0 auto;
    }

    .propose_grid {
        grid-template-columns: 1fr;
    }

    /* 减少间距 */
    .flow1_steps {
        gap: 1rem;
    }

    .flow1_step:not(:last-child)::after {
        right: -1rem;
        width: 2rem;
    }

    .flow1_step {
        max-width: 240px;
    }

    .features_grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .feature_item {
        padding: 1rem 1.5rem;
    }

    /* .feature_title {
        font-size: 1.1rem;
    }

    .feature_description {
        font-size: 0.8rem;
    } */

    .feature_content {
        flex-direction: column;
        gap: 1rem;
    }

    .feature_stats {
        flex-direction: column;
        gap: 0.5rem;
    }

    .solution_points {
        gap: 1.5rem;
        width: unset;
    }

    .point_english_subtitle {
        margin-top: -5px;
    }

    .solution_point {
        padding: 0.5rem 1rem;
    }

    .point_title {
        font-size: 1.5rem;
    }

    .point_description {
        font-size: 0.8rem;
    }

    /* 缩小图片 */
    .genre_grid img {
        height: 60px;
    }

    .price img {
        width: 67%;
    }

    .works_lists {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }

    .video {
        height: 180px;
    }

    .results_grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .price_grid {
        grid-template-columns: 1fr;
    }

    h3.flow2_title {
        font-size: 1.26rem;
    }

    .flow2 .container {
        max-width: 81%;
    }

    .flow2_step_label {
        padding: 0.4rem 0.5rem;
        width: 60px;
    }

    .flow2_icon img {
        width: 50%;
    }

    .flow2_steps {
        gap: 5rem 3rem;
    }

    .flow2_step {
        padding: 1rem 0.25rem 0.25rem 0.25rem;
    }

    .qa_item dt {
        padding: 0.5rem;
    }

    .qa_item_text {
        font-size: 0.9rem;
    }

    .footer_content {
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    section {
        /* min-height: 75vh; */
        padding: 1.5rem 0;
    }

    .section_header {
        margin-bottom: 0.75rem;
    }

    .container_title {
        margin-bottom: 0.75rem;
    }

    .nav {
        display: none;
    }

    .fv_title {
        font-size: 2.5rem;
    }

    .fv_subtitle {
        font-size: 1.25rem;
    }

    .about_content {
        grid-template-columns: 1fr;
    }

    .solution_content {
        grid-template-columns: 1fr;
    }

    .flow1_steps {
        flex-direction: column;
        gap: 2rem;
    }


    .flow2_steps {
        grid-template-columns: 1fr;
    }

    .works_lists {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .video {
        height: 160px;
    }

    .title {
        padding: 0.75rem;
        font-size: 0.875rem;
    }

    .tags {
        padding: 0.5rem 0.75rem 0.75rem;
        gap: 0.375rem;
    }

    .tags span {
        font-size: 0.625rem;
        padding: 0.1875rem 0.5rem;
    }

    .results_grid {
        grid-template-columns: 1fr;
    }

    .footer_content {
        gap: 1rem;
    }
}

/* Ultra-wide screen responsive design (2560px and above) */
@media (min-width: 2560px) {

    /* Typography scaling for ultra-wide screens */
    html {
        font-size: 18px;
    }

    h1 {
        font-size: 4rem;
    }

    h2 {
        font-size: 3rem;
    }

    h3 {
        font-size: 2.5rem;
    }

    h4 {
        font-size: 2rem;
    }

    h5 {
        font-size: 1.5rem;
    }

    h6 {
        font-size: 1.25rem;
    }

    p {
        font-size: 1.125rem;
    }

    /* Section spacing adjustments */
    .section_header {
        margin-bottom: 4rem;
    }

    .section_subtitle {
        font-size: 3rem;
    }

    .logo img {
        height: 3.5rem;
    }

    .nav_list {
        gap: 3rem;
    }

    .nav_link {
        font-size: 1.5rem;
    }

    /* Button scaling */
    .btn {
        padding: 1rem 2rem;
        font-size: 1.125rem;
        border-radius: 0.75rem;
    }

    .btn_large {
        padding: 1.25rem 2.5rem;
        font-size: 1.25rem;
    }

    /* FV Section adjustments */
    /* .header_content {
        padding: 2rem 8rem;
    } */

    .fv_content {
        padding: 0 4rem;
    }

    .fv_content span {
        font-size: 3.3rem;
    }

    .fv_content span P {
        font-size: 6rem;
    }

    /* Grid layouts for ultra-wide screens */
    .propose_box {
        width: 80%;
        margin: -100px auto 0 auto;
        padding: 60px 12%;
    }

    .propose_grid {
        gap: 3rem;
    }

    .propose_item {
        padding: 1rem;
    }

    .propose_icon img {
        width: 5rem;
        height: 5rem;
        margin-bottom: 2rem;
    }

    .propose_title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .propose_description {
        font-size: 1.125rem;
    }

    /* Flow1 adjustments */
    .flow1_steps {
        gap: 5rem;
    }

    .flow1_step {
        max-width: 350px;
    }

    .flow1_icon {
        margin-bottom: 2rem;
    }

    .flow1_content {
        padding: 2rem;
    }

    .flow1_title {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    .flow1_description {
        font-size: 1rem;
    }

    .flow1_step:not(:last-child)::after {
        top: 125px;
        right: -10rem;
    }

    /* Banner adjustments */
    .banner_title {
        font-size: 3.5rem;
        margin-bottom: 1.5rem;
    }

    .banner_subtitle {
        font-size: 1.5rem;
        margin-bottom: 2.5rem;
    }

    /* Features grid adjustments */
    .features_grid {
        grid-template-columns: 1fr;
        gap: 4rem;
        max-width: 1200px;
    }

    .feature_item {
        padding: 4rem;
    }

    .feature_content {
        gap: 3rem;
    }

    .feature_title {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }

    .feature_description {
        font-size: 1.25rem;
    }

    .feature_description_small {
        font-size: 1.125rem;
    }

    .feature_list li {
        font-size: 1.25rem;
    }

    .stat_value {
        font-size: 2rem;
    }

    .stat_label {
        font-size: 1rem;
    }

    /* About and Solution sections */
    .about_content,
    .solution_content {
        gap: 4rem;
    }

    .about_title,
    .solution_title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .about_description,
    .solution_description {
        font-size: 1.25rem;
        margin-bottom: 2.5rem;
    }

    .about_feature,
    .solution_feature {
        font-size: 1.125rem;
        padding: 0.75rem 0;
        padding-left: 2rem;
    }

    /* Genre grid adjustments */

    .genre_item {
        padding: 3rem;
    }

    .genre_icon img {
        width: 5rem;
        height: 5rem;
        margin-bottom: 2rem;
    }

    .genre_title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .genre_description {
        font-size: 1.125rem;
    }

    /* Results grid adjustments */
    .results_grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 3rem;
    }

    .result_item {
        padding: 3rem;
    }

    .result_number {
        font-size: 4rem;
        margin-bottom: 1.5rem;
    }

    .result_title {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    .result_description {
        font-size: 1.125rem;
    }

    /* Price grid adjustments */
    .price_grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 3rem;
        max-width: 1400px;
    }

    .price_item {
        padding: 3rem;
    }

    .price_title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .price_value {
        font-size: 4rem;
    }

    .price_currency {
        font-size: 2rem;
    }

    .price_period {
        font-size: 1.25rem;
    }

    .price_feature {
        font-size: 1.125rem;
        padding: 0.75rem 0;
    }

    /* Flow2 adjustments */
    .flow2_steps {
        grid-template-columns: repeat(4, 1fr);
        gap: 3rem;
    }

    .flow2_icon img {
        margin-bottom: 2rem;
    }

    .flow2_title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .flow2_description {
        font-size: 1.125rem;
    }

    /* Q&A adjustments */
    .qa_list {
        max-width: 1000px;
    }

    .qa_item {
        margin-bottom: 1.5rem;
    }

    .qa_question {
        padding: 2rem;
    }

    .qa_title {
        font-size: 1.25rem;
    }

    .qa_toggle {
        font-size: 2rem;
    }

    .qa_answer {
        padding: 0 2rem 2rem;
        font-size: 1.125rem;
    }

    /* Footer adjustments */
    .footer {
        padding: 4rem 0 2rem;
    }

    .footer_content {
        gap: 3rem;
    }

    .footer_logo img {
        height: 3rem;
        margin-bottom: 1.5rem;
    }

    .footer_title {
        font-size: 1.25rem;
        margin-bottom: 1.5rem;
    }

    .footer_description {
        font-size: 1.125rem;
    }

    .footer_link {
        font-size: 1.125rem;
        padding: 0.5rem 0;
    }

    .footer_copyright {
        font-size: 1.125rem;
    }
}

/* Extra ultra-wide screen responsive design (3840px and above - 4K displays) */
@media (min-width: 3840px) {

    /* Typography scaling for 4K displays */
    html {
        font-size: 20px;
    }

    h1 {
        font-size: 5rem;
    }

    h2 {
        font-size: 4rem;
    }

    h3 {
        font-size: 3rem;
    }

    h4 {
        font-size: 2.5rem;
    }

    h5 {
        font-size: 2rem;
    }

    h6 {
        font-size: 1.5rem;
    }

    p {
        font-size: 1.25rem;
    }

    /* Section spacing adjustments for 4K */
    section {
        padding: 8rem 0;
    }

    .section_header {
        margin-bottom: 5rem;
    }

    .section_subtitle {
        font-size: 1.5rem;
        max-width: 1000px;
    }

    /* Header adjustments for 4K */
    .header_content {
        padding: 2rem 10rem;
    }

    .logo img {
        height: 5rem;
    }

    .nav_list {
        gap: 4rem;
    }

    .nav_link {
        font-size: 2.25rem;
    }

    /* Button scaling for 4K */
    .btn {
        padding: 1.25rem 2.5rem;
        font-size: 1.25rem;
        border-radius: 1rem;
    }

    .btn_large {
        padding: 1.5rem 3rem;
        font-size: 1.5rem;
    }

    /* FV Section adjustments for 4K */
    .fv_content span {
        font-size: 4rem;
    }

    .fv_content span P {
        font-size: 6rem;
    }

    /* Grid layouts for 4K displays */
    .propose_grid {
        gap: 4rem;
    }

    .propose_item {
        padding: 4rem;
    }

    .propose_icon img {
        width: 6rem;
        height: 6rem;
        margin-bottom: 2.5rem;
    }

    .propose_title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .propose_description {
        font-size: 1.25rem;
    }

    /* Flow1 adjustments for 4K */
    .flow1_steps {
        gap: 6rem;
    }

    .flow1_step {
        max-width: 400px;
    }

    .flow1_icon {
        margin-bottom: 2.5rem;
    }

    .flow1_content {
        padding: 2.5rem;
    }

    .flow1_title {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }

    .flow1_description {
        font-size: 1.25rem;
    }

    .flow1_step:not(:last-child)::after {
        top: 150px;
        right: -15rem;
    }

    /* Banner adjustments for 4K */
    .banner_title {
        font-size: 4.5rem;
        margin-bottom: 2rem;
    }

    .banner_subtitle {
        font-size: 2rem;
        margin-bottom: 3rem;
    }

    /* Features grid adjustments for 4K */
    .features_grid {
        gap: 5rem;
        max-width: 1400px;
    }

    .feature_item {
        padding: 5rem;
    }

    .feature_content {
        gap: 4rem;
    }

    .feature_title {
        font-size: 2.5rem;
        margin-bottom: 2rem;
    }

    .feature_description {
        font-size: 1.5rem;
    }

    .feature_description_small {
        font-size: 1.25rem;
    }

    .feature_list li {
        font-size: 1.25rem;
    }

    .stat_value {
        font-size: 2.5rem;
    }

    .stat_label {
        font-size: 1.125rem;
    }

    /* About and Solution sections for 4K */
    .about_content,
    .solution_content {
        gap: 5rem;
    }

    .about_title,
    .solution_title {
        font-size: 2.5rem;
        margin-bottom: 2.5rem;
    }

    .about_description,
    .solution_description {
        font-size: 1.5rem;
        margin-bottom: 3rem;
    }

    .about_feature,
    .solution_feature {
        font-size: 1.25rem;
        padding: 1rem 0;
        padding-left: 2.5rem;
    }

    /* Genre grid adjustments for 4K */
    .genre_grid {
        gap: 4rem;
    }

    .genre_item {
        padding: 4rem;
    }

    .genre_icon img {
        width: 6rem;
        height: 6rem;
        margin-bottom: 2.5rem;
    }

    .genre_title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .genre_description {
        font-size: 1.25rem;
    }

    /* Results grid adjustments for 4K */
    .results_grid {
        gap: 4rem;
    }

    .result_item {
        padding: 4rem;
    }

    .result_number {
        font-size: 5rem;
        margin-bottom: 2rem;
    }

    .result_title {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }

    .result_description {
        font-size: 1.25rem;
    }

    /* Price grid adjustments for 4K */
    .price_grid {
        gap: 4rem;
        max-width: 1800px;
    }

    .price_item {
        padding: 4rem;
    }

    .price_title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .price_value {
        font-size: 5rem;
    }

    .price_currency {
        font-size: 2.5rem;
    }

    .price_period {
        font-size: 1.5rem;
    }

    .price_feature {
        font-size: 1.25rem;
        padding: 1rem 0;
    }

    /* Flow2 adjustments for 4K */
    .flow2_steps {
        gap: 4rem;
    }

    .flow2_step {
        padding: 4rem 3rem;
    }

    .flow2_icon img {
        margin-bottom: 2.5rem;
    }

    .flow2_title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .flow2_description {
        font-size: 1.25rem;
    }

    /* Q&A adjustments for 4K */
    .qa_list {
        max-width: 1200px;
    }

    .qa_item {
        margin-bottom: 2rem;
    }

    .qa_question {
        padding: 2.5rem;
    }

    .qa_title {
        font-size: 1.5rem;
    }

    .qa_toggle {
        font-size: 2.5rem;
    }

    .qa_answer {
        padding: 0 2.5rem 2.5rem;
        font-size: 1.25rem;
    }

    /* Footer adjustments for 4K */
    .footer {
        padding: 5rem 0 2.5rem;
    }

    .footer_content {
        gap: 4rem;
    }

    .footer_logo img {
        height: 4rem;
        margin-bottom: 2rem;
    }

    .footer_title {
        font-size: 1.5rem;
        margin-bottom: 2rem;
    }

    .footer_description {
        font-size: 1.25rem;
    }

    .footer_link {
        font-size: 1.25rem;
        padding: 0.75rem 0;
    }

    .footer_copyright {
        font-size: 1.25rem;
    }
}