/* ============================================
   CSS Variables
   ============================================ */
:root {
    --color-main: #1a365d;
    --color-accent: #c53030;
    --color-white: #ffffff;
    --color-gray-light: #f7f7f7;
    --color-gray: #e5e5e5;
    --color-gray-dark: #666666;
    --color-text: #333333;
    --font-family: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
}

/* ============================================
   Reset
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ============================================
   Layout
   ============================================ */
.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section--gray {
    background-color: var(--color-gray-light);
}

.section--main {
    background-color: var(--color-main);
    color: var(--color-white);
}

/* ============================================
   Scroll Animations
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Typography
   ============================================ */
.text-accent {
    color: var(--color-accent);
}

strong {
    font-weight: 700;
}

.heading-section {
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-main);
    margin-bottom: 16px;
}

.section--main .heading-section {
    color: var(--color-white);
    opacity: 0.7;
}

.heading-title {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 24px;
}

.heading-lead {
    font-size: 16px;
    color: var(--color-gray-dark);
    max-width: 560px;
}

.section--main .heading-lead {
    color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray);
    transition: box-shadow 0.2s ease;
}

.header.is-scrolled {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-image {
    height: 40px;
    width: auto;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--color-main);
}

.nav-link--cta {
    background-color: var(--color-main);
    color: var(--color-white);
    padding: 10px 20px;
    border-radius: 2px;
}

.nav-link--cta:hover {
    background-color: #15294a;
    color: var(--color-white);
}

.hamburger {
    display: none;
    width: 24px;
    height: 20px;
    position: relative;
    cursor: pointer;
    border: none;
    background: none;
}

.hamburger-line {
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.hamburger-line:nth-child(1) { top: 0; }
.hamburger-line:nth-child(2) { top: 9px; }
.hamburger-line:nth-child(3) { bottom: 0; }

.hamburger.is-active .hamburger-line:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.hamburger.is-active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger.is-active .hamburger-line:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* ============================================
   Hero
   ============================================ */
.hero {
    padding-top: 72px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-color: var(--color-gray-light);
    position: relative;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1080px;
    margin: 0 auto;
    padding: 80px 24px;
}

.hero-content {
    padding-right: 40px;
}

.hero-catch {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-main);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-sub {
    font-size: 18px;
    color: var(--color-gray-dark);
    margin-bottom: 16px;
    line-height: 1.8;
}

.hero-price-appeal {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 24px;
    padding: 12px 16px;
    background-color: rgba(197, 48, 48, 0.08);
    border: 1px solid var(--color-accent);
}

.hero-price-appeal strong {
    font-weight: 900;
}

.hero-info-box {
    background-color: var(--color-white);
    padding: 20px 24px;
    margin-bottom: 32px;
    border: 1px solid var(--color-gray);
}

.hero-info-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 0;
}

.hero-info-item:not(:last-child) {
    border-bottom: 1px solid var(--color-gray);
    padding-bottom: 12px;
    margin-bottom: 4px;
}

.hero-info-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--color-white);
    background-color: var(--color-main);
    padding: 4px 12px;
    flex-shrink: 0;
}

.hero-info-value {
    font-size: 14px;
    color: var(--color-text);
}

.hero-info-value strong {
    color: var(--color-main);
    font-weight: 700;
}

.hero-cta-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-cta {
    display: inline-block;
    font-size: 16px;
    font-weight: 700;
    padding: 16px 32px;
    border-radius: 2px;
    transition: background-color 0.2s ease;
    text-align: center;
}

.hero-cta--line {
    background-color: #06C755;
    color: var(--color-white);
}

.hero-cta--line:hover {
    background-color: #05a648;
}

.hero-cta--form {
    background-color: var(--color-main);
    color: var(--color-white);
}

.hero-cta--form:hover {
    background-color: #15294a;
}

.hero-cta-note {
    margin-top: 16px;
    font-size: 13px;
    color: var(--color-gray-dark);
}

.hero-cta-note strong {
    color: var(--color-main);
    font-weight: 700;
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--color-gray);
}

.hero-stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-main);
    line-height: 1;
}

.hero-stat-label {
    font-size: 13px;
    color: var(--color-gray-dark);
    margin-top: 8px;
}

/* Hero Feature Box */
.hero-feature-box {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.hero-feature-main {
    padding: 24px 0;
    border-bottom: 1px solid var(--color-gray);
    overflow: hidden;
}

.hero-feature-main:last-child {
    border-bottom: none;
}

.hero-feature-big {
    display: block;
    font-size: 56px;
    font-weight: 900;
    color: var(--color-main);
    letter-spacing: 0.05em;
    line-height: 1;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.hero-feature-big.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-feature-jp {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-dark);
    margin-top: 8px;
    letter-spacing: 0.05em;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease 0.2s, transform 0.6s ease 0.2s;
}

.hero-feature-jp.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   About (Member & Payment)
   ============================================ */
.section--about {
    background-color: var(--color-main);
    padding: 80px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.about-card {
    background-color: var(--color-white);
    padding: 40px;
}

.about-card-label {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 12px;
}

.about-card-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: 16px;
}

.about-card-text {
    font-size: 15px;
    color: var(--color-gray-dark);
    line-height: 1.8;
    margin-bottom: 24px;
}

.about-card-text strong {
    color: var(--color-main);
    font-weight: 700;
}

.about-card-list {
    list-style: none;
}

.about-card-list li {
    font-size: 14px;
    color: var(--color-text);
    padding: 12px 0;
    padding-left: 24px;
    position: relative;
    border-bottom: 1px solid var(--color-gray);
}

.about-card-list li:first-child {
    border-top: 1px solid var(--color-gray);
}

.about-card-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-main);
    font-weight: 700;
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.payment-method {
    background-color: var(--color-main);
    color: var(--color-white);
    padding: 16px;
    text-align: center;
    font-weight: 700;
    font-size: 15px;
}

.payment-method--other {
    background-color: var(--color-gray-light);
    color: var(--color-gray-dark);
    font-weight: 500;
}

/* ============================================
   Service
   ============================================ */
.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.service-card {
    background-color: var(--color-white);
    padding: 40px 32px;
    border: 1px solid var(--color-gray);
    transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.section--gray .service-card {
    border: none;
}

.service-card:hover {
    border-color: var(--color-main);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(26, 54, 93, 0.1);
}

.service-card-number {
    font-size: 12px;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.service-card-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
}

.service-card-text {
    font-size: 14px;
    color: var(--color-gray-dark);
    line-height: 1.8;
}

/* ============================================
   Flow
   ============================================ */
.flow-list {
    margin-top: 60px;
}

.flow-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 40px;
    padding: 40px 0;
    border-bottom: 1px solid var(--color-gray);
    align-items: start;
}

.flow-item:first-child {
    border-top: 1px solid var(--color-gray);
}

.flow-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--color-main);
    line-height: 1;
}

.flow-content-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.flow-content-text {
    font-size: 15px;
    color: var(--color-gray-dark);
}

.flow-content-text strong {
    color: var(--color-main);
}

.flow-item--highlight {
    background-color: rgba(197, 48, 48, 0.05);
    margin-left: -24px;
    margin-right: -24px;
    padding-left: 24px;
    padding-right: 24px;
    border-left: 3px solid var(--color-accent);
}

/* ============================================
   Price
   ============================================ */
.price-base {
    margin-top: 48px;
    text-align: center;
    padding: 32px;
    background-color: var(--color-main);
    color: var(--color-white);
}

.price-base-label {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 8px;
    opacity: 0.8;
}

.price-base-amount {
    font-size: 24px;
    font-weight: 700;
}

.price-base-amount span {
    font-size: 36px;
}

.price-base-note {
    margin-top: 12px;
    font-size: 14px;
    opacity: 0.8;
}

.price-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 32px;
    align-items: stretch;
}

.price-card {
    background-color: var(--color-white);
    padding: 40px 32px;
    text-align: center;
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    min-height: 320px;
}

.price-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(26, 54, 93, 0.1);
}

.price-card--featured {
    border: 2px solid var(--color-main);
}

.price-card--featured::before {
    content: "人気";
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-main);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 700;
    padding: 4px 16px;
}

.price-card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.price-card-sub {
    font-size: 12px;
    color: var(--color-gray-dark);
    margin-bottom: 24px;
}

.price-card-price {
    font-size: 14px;
    color: var(--color-gray-dark);
    margin-bottom: 24px;
    padding: 16px 0;
    border-top: 1px solid var(--color-gray);
    border-bottom: 1px solid var(--color-gray);
}

.price-card-note {
    font-size: 13px;
    color: var(--color-gray-dark);
    text-align: left;
    line-height: 1.8;
}

.price-card-btn {
    display: block;
    margin-top: auto;
    padding: 12px;
    background-color: var(--color-main);
    color: var(--color-white);
    font-size: 14px;
    font-weight: 700;
    border-radius: 2px;
    transition: background-color 0.2s ease;
}

.price-card-btn:hover {
    background-color: #15294a;
}

.price-table-wrapper {
    margin-top: 48px;
    background-color: var(--color-white);
    padding: 32px;
}

.price-table-title {
    font-size: 18px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}

.price-table-note {
    font-size: 14px;
    color: var(--color-gray-dark);
    text-align: center;
    margin-bottom: 24px;
}

.price-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.price-table th,
.price-table td {
    padding: 12px 16px;
    text-align: center;
    border: 1px solid var(--color-gray);
}

.price-table th {
    background-color: var(--color-main);
    color: var(--color-white);
    font-weight: 700;
}

.price-table th:first-child {
    background-color: var(--color-gray-light);
    color: var(--color-text);
}

.price-table td:first-child {
    background-color: var(--color-gray-light);
    font-weight: 700;
}

.price-table tbody tr:hover {
    background-color: rgba(26, 54, 93, 0.05);
}

.price-table-caution {
    margin-top: 16px;
    font-size: 13px;
    color: var(--color-gray-dark);
    text-align: center;
}

.price-payment {
    margin-top: 24px;
    margin-bottom: 8px;
    font-size: 15px;
    text-align: center;
    color: var(--color-text);
}

.price-payment strong {
    color: var(--color-main);
    font-weight: 700;
}

.price-note {
    margin-top: 40px;
    font-size: 14px;
    color: var(--color-gray-dark);
    text-align: center;
}

/* ============================================
   Sample
   ============================================ */
.sample-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 60px;
}

.sample-card {
    background-color: var(--color-white);
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid var(--color-gray);
}

.sample-card:hover {
    border-color: var(--color-main);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(26, 54, 93, 0.1);
}

.sample-card:hover .sample-card-link {
    color: var(--color-accent);
}

.sample-card-inner {
    padding: 32px 24px;
}

.sample-card-number {
    font-size: 12px;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 12px;
}

.sample-card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.sample-card-desc {
    font-size: 14px;
    color: var(--color-gray-dark);
    margin-bottom: 16px;
}

.sample-card-link {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-main);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.is-active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
}

.modal-content {
    position: relative;
    background-color: var(--color-white);
    max-width: 800px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    padding: 40px;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    background: none;
    border: 1px solid var(--color-gray);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s ease;
}

.modal-close:hover {
    border-color: var(--color-main);
}

.modal-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
    padding-right: 40px;
}

.modal-body {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-gray-dark);
}

.modal-body p {
    margin-bottom: 16px;
}

.modal-body p:last-child {
    margin-bottom: 0;
}

/* ============================================
   Works
   ============================================ */
.works-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 60px;
}

.works-stat-item {
    background-color: var(--color-white);
    padding: 40px 24px;
    text-align: center;
}

.works-stat-number {
    display: block;
    font-size: 48px;
    font-weight: 900;
    color: var(--color-main);
    line-height: 1;
    margin-bottom: 12px;
}

.works-stat-label {
    font-size: 14px;
    color: var(--color-gray-dark);
}

.works-categories {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.works-category {
    background-color: var(--color-white);
    padding: 32px;
}

.works-category-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-main);
}

.works-category-text {
    font-size: 14px;
    color: var(--color-gray-dark);
    line-height: 1.8;
}

/* ============================================
   External
   ============================================ */
.external-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 60px;
}

.external-card {
    display: block;
    padding: 32px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.external-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.external-card--line {
    background-color: #06C755;
    color: var(--color-white);
}

.external-card--x {
    background-color: #000000;
    color: var(--color-white);
}

.external-card--note {
    background-color: var(--color-white);
    color: #000000;
    border: 2px solid #000000;
}

.external-card--coconala {
    background-color: #57C5B6;
    color: var(--color-white);
}

.external-card-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.external-card-text {
    font-size: 14px;
    opacity: 0.8;
}

.external-card--note .external-card-text {
    color: var(--color-gray-dark);
}

/* ============================================
   FAQ
   ============================================ */
.faq-container {
    margin-top: 60px;
}

.faq-category {
    margin-bottom: 48px;
}

.faq-category:last-child {
    margin-bottom: 0;
}

.faq-category-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-main);
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-main);
}

.faq-list {
    max-width: 100%;
}

.faq-item {
    border-bottom: 1px solid var(--color-gray);
}

.faq-item:first-child {
    border-top: 1px solid var(--color-gray);
}

.faq-question {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 0;
    cursor: pointer;
    list-style: none;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background-color: var(--color-main);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.faq-question-text {
    font-size: 15px;
    font-weight: 700;
    padding-top: 2px;
}

.faq-answer {
    padding: 0 0 20px 40px;
}

.faq-answer p {
    font-size: 14px;
    color: var(--color-gray-dark);
    line-height: 1.8;
}

/* ============================================
   Contact
   ============================================ */
.contact-inner {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    margin-top: 60px;
}

.contact-info-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-info-text {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 16px;
}

.contact-info-text strong {
    color: var(--color-white);
    font-weight: 700;
}

.contact-info-note {
    font-size: 14px;
    color: var(--color-white);
    font-weight: 500;
    margin-bottom: 32px;
    padding: 12px 16px;
    background-color: rgba(255, 255, 255, 0.15);
    border-left: 3px solid #FFD700;
}

.contact-info-note strong {
    color: #FFD700;
    font-weight: 700;
}

.contact-sns {
    display: flex;
    gap: 16px;
}

.contact-sns-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    font-size: 12px;
    font-weight: 700;
    transition: opacity 0.2s ease;
}

.contact-sns-link:hover {
    opacity: 0.8;
}

.contact-sns-link--line {
    background-color: #06C755;
    color: var(--color-white);
}

.contact-sns-link--x {
    background-color: #000000;
    color: var(--color-white);
}

.contact-sns-link--note {
    background-color: var(--color-white);
    color: #000000;
    border: 1px solid #000000;
}

.contact-form {
    background-color: var(--color-white);
    padding: 40px;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 8px;
}

.form-required {
    color: var(--color-accent);
    margin-left: 4px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-gray);
    border-radius: 2px;
    background-color: var(--color-white);
    transition: border-color 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-main);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-file {
    width: 100%;
    padding: 12px 16px;
    border: 1px dashed var(--color-gray);
    border-radius: 2px;
    background-color: var(--color-gray-light);
    cursor: pointer;
}

.form-file:hover {
    border-color: var(--color-main);
}

.form-file-note {
    margin-top: 8px;
    font-size: 12px;
    color: var(--color-gray-dark);
}

.form-submit {
    width: 100%;
    padding: 16px;
    background-color: var(--color-main);
    color: var(--color-white);
    font-size: 16px;
    font-weight: 700;
    border: none;
    border-radius: 2px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.form-submit:hover {
    background-color: #15294a;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--color-main);
    color: var(--color-white);
    padding: 60px 0 40px;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-logo-image {
    height: 36px;
    width: auto;
    margin-bottom: 16px;
}

.footer-text {
    font-size: 14px;
    opacity: 0.7;
}

.footer-nav {
    display: flex;
    gap: 60px;
    justify-content: flex-end;
}

.footer-nav-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-nav-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-nav-link {
    font-size: 14px;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.footer-nav-link:hover {
    opacity: 1;
}

.footer-bottom {
    padding-top: 40px;
    text-align: center;
}

.footer-copyright {
    font-size: 13px;
    opacity: 0.5;
}

/* ============================================
   Back to Top
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    background-color: var(--color-main);
    color: var(--color-white);
    border: none;
    border-radius: 2px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: #15294a;
}

/* ============================================
   Floating LINE CTA
   ============================================ */
.floating-cta {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 90;
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: #06C755;
    color: var(--color-white);
    padding: 14px 24px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 4px 16px rgba(6, 199, 85, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background-color 0.2s ease;
}

.floating-cta.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.floating-cta:hover {
    background-color: #05a648;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 199, 85, 0.5);
}

.floating-cta-icon {
    width: 20px;
    height: 20px;
}

@media (max-width: 600px) {
    .floating-cta {
        left: 16px;
        bottom: 16px;
        padding: 12px 20px;
        font-size: 13px;
    }

    .back-to-top {
        bottom: 16px;
        right: 16px;
    }
}

/* ============================================
   Responsive
   ============================================ */
/* Mobile Nav Overlay */
.nav-overlay {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 90;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-overlay.is-active {
    opacity: 1;
}

@media (max-width: 900px) {
    .hamburger {
        display: block;
    }

    .nav-overlay {
        display: block;
        pointer-events: none;
    }

    .nav-overlay.is-active {
        pointer-events: auto;
    }

    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--color-white);
        padding: 40px 24px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 95;
    }

    .nav.is-active {
        transform: translateX(0);
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }

    .nav-link--cta {
        width: 100%;
        text-align: center;
    }

    .hero-inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-content {
        padding-right: 0;
    }

    .hero-catch {
        font-size: 36px;
    }

    .hero-visual {
        order: -1;
    }

    .about-grid,
    .service-grid,
    .price-grid,
    .external-grid,
    .sample-grid {
        grid-template-columns: 1fr;
    }

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

    .works-categories {
        grid-template-columns: 1fr;
    }

    .flow-item {
        grid-template-columns: 60px 1fr;
        gap: 24px;
    }

    .flow-number {
        font-size: 36px;
    }

    .contact-inner {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-nav {
        justify-content: flex-start;
        gap: 40px;
    }
}

@media (max-width: 600px) {
    .section {
        padding: 60px 0;
    }

    .hero-catch {
        font-size: 28px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .hero-feature-big {
        font-size: 36px;
    }

    .hero-feature-jp {
        font-size: 13px;
    }

    .heading-title {
        font-size: 24px;
    }

    .contact-form {
        padding: 24px;
    }

    .footer-nav {
        flex-direction: column;
        gap: 32px;
    }

    .price-table-wrapper {
        padding: 16px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .price-table {
        font-size: 13px;
        min-width: 340px;
    }

    .price-table th,
    .price-table td {
        padding: 10px 8px;
        font-size: 12px;
    }

    .price-table th {
        font-size: 11px;
        white-space: nowrap;
    }

    .price-table td:first-child {
        white-space: nowrap;
    }
}

/* ============================================
   Voice / Testimonials
   ============================================ */
.voice-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 60px;
}

.voice-card {
    background-color: var(--color-white);
    padding: 40px 32px;
    position: relative;
}

.voice-card::before {
    content: "\201C";
    position: absolute;
    top: 16px;
    left: 24px;
    font-size: 64px;
    font-weight: 900;
    color: var(--color-main);
    opacity: 0.15;
    line-height: 1;
    font-family: Georgia, serif;
}

.voice-card-stars {
    display: flex;
    gap: 2px;
    margin-bottom: 16px;
}

.voice-card-star {
    color: #F6AD55;
    font-size: 16px;
}

.voice-card-text {
    font-size: 15px;
    color: var(--color-text);
    line-height: 1.9;
    margin-bottom: 24px;
}

.voice-card-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 20px;
    border-top: 1px solid var(--color-gray);
}

.voice-card-avatar {
    width: 48px;
    height: 48px;
    background-color: var(--color-main);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    flex-shrink: 0;
}

.voice-card-info-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 2px;
}

.voice-card-info-detail {
    font-size: 12px;
    color: var(--color-gray-dark);
}

.voice-card-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    color: var(--color-main);
    background-color: rgba(26, 54, 93, 0.08);
    padding: 4px 10px;
    margin-bottom: 16px;
}

@media (max-width: 900px) {
    .voice-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

/* ============================================
   AI Declaration
   ============================================ */
.ai-declaration {
    background-color: var(--color-main);
    padding: 80px 0;
}

.ai-declaration-inner {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.ai-declaration-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: #FFD700;
    margin-bottom: 16px;
}

.ai-declaration-title {
    font-size: 28px;
    font-weight: 900;
    color: var(--color-white);
    line-height: 1.4;
    margin-bottom: 20px;
}

.ai-declaration-text {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.9;
    margin-bottom: 16px;
}

.ai-declaration-list {
    list-style: none;
}

.ai-declaration-list li {
    font-size: 15px;
    color: var(--color-white);
    padding: 12px 0;
    padding-left: 28px;
    position: relative;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.ai-declaration-list li:first-child {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.ai-declaration-list li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: #FFD700;
    font-weight: 700;
}

@media (max-width: 900px) {
    .ai-declaration-inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .ai-declaration-title {
        font-size: 24px;
    }
}