/* 
 * AI研修LP スタイルシート
 * 
 * デザインコンセプト:
 * - 見やすさ: 情報の階層化、適切な余白、読みやすいフォント
 * - 質感と奥行き: 立体感のあるデザイン要素、素材感のある背景、視差効果
 * - AIっぽくないデザイン: 有機的な形状、人間味のある要素、バランスの取れたモダンさ
 */

/* ===== 基本設定 ===== */
:root {
    /* メインカラー */
    --primary-blue: #2A4B8D;
    --secondary-blue: #3A6BC5;
    
    /* アクセントカラー */
    --primary-orange: #FF7A3D;
    --secondary-orange: #FFB23D;
    
    /* ベースカラー */
    --light-gray: #F8F9FA;
    --white: #FFFFFF;
    --dark-gray: #333333;
    
    /* セクションカラー */
    --section-red: #E63946;
    --section-blue: #457B9D;
    --section-yellow: #F9C74F;
    --section-green: #43AA8B;
    --section-purple: #6A4C93;
    
    /* フォントファミリー */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-accent: 'M PLUS Rounded 1c', sans-serif;
    
    /* サイズ・スペース */
    --container-max-width: 1200px;
    --container-padding: 2rem;
    --section-spacing: 5rem;
    --card-border-radius: 12px;
    
    /* エフェクト */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
    --transition-speed: 0.3s;
}

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

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

body {
    font-family: var(--font-primary);
    color: var(--dark-gray);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23f0f0f0' fill-opacity='0.2' fill-rule='evenodd'/%3E%3C/svg%3E");
    background-attachment: fixed;
}

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

/* コンテナ */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* セクション共通 */
section {
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

/* テキスト装飾 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1.5rem;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.5rem;
}

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

.highlight {
    font-family: var(--font-accent);
    color: var(--primary-orange);
    font-weight: 500;
}

.highlight-strong {
    font-weight: 700;
    background: linear-gradient(transparent 70%, rgba(255, 122, 61, 0.3) 70%);
    padding: 0 0.2em;
}

.highlight-large {
    font-size: 1.2em;
    font-weight: 700;
    color: var(--primary-blue);
    display: inline-block;
    margin: 0.5rem 0;
    border-bottom: 3px solid var(--primary-orange);
    padding-bottom: 0.2rem;
}

.subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
}

/* ===== ヘッダー ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
    z-index: 1000;
    transition: all var(--transition-speed);
}

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

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-blue);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.logo .service-name {
    font-size: 1.5rem;
    display: block;
    margin-top: 0.2rem;
}

/* ===== ボタン ===== */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    transition: all var(--transition-speed);
    box-shadow: var(--shadow-sm);
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-orange);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--secondary-orange);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
    background-color: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.2rem;
}

.btn-cta {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 122, 61, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(255, 122, 61, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(255, 122, 61, 0);
    }
}

/* ===== セクション区切り ===== */
.section-divider {
    position: absolute;
    left: 0;
    width: 100%;
    height: 70px;
    z-index: 2;
}

.wave-red {
    bottom: -1px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120' preserveAspectRatio='none'%3E%3Cpath d='M321.39,56.44c58-10.79,114.16-30.13,172-41.86,82.39-16.72,168.19-17.73,250.45-.39C823.78,31,906.67,72,985.66,92.83c70.05,18.48,146.53,26.09,214.34,3V0H0V27.35A600.21,600.21,0,0,0,321.39,56.44Z' fill='%23ffffff'/%3E%3C/svg%3E");
    background-size: cover;
}

.wave-gradient {
    bottom: -1px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120' preserveAspectRatio='none'%3E%3Cpath d='M321.39,56.44c58-10.79,114.16-30.13,172-41.86,82.39-16.72,168.19-17.73,250.45-.39C823.78,31,906.67,72,985.66,92.83c70.05,18.48,146.53,26.09,214.34,3V0H0V27.35A600.21,600.21,0,0,0,321.39,56.44Z' fill='%23ffffff'/%3E%3C/svg%3E");
    background-size: cover;
}

.slant-yellow-top {
    top: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120' preserveAspectRatio='none'%3E%3Cpath d='M1200 0L0 0 598.97 114.72 1200 0z' fill='%23ffffff'/%3E%3C/svg%3E");
    background-size: cover;
}

.slant-yellow-bottom {
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 120' preserveAspectRatio='none'%3E%3Cpath d='M1200 120L0 16.48 0 0 1200 0 1200 120z' fill='%23ffffff'/%3E%3C/svg%3E");
    background-size: cover;
}

/* ===== セクション背景色 ===== */
.section-gradient {
    background: linear-gradient(135deg, #2b5876 0%, #4e4376 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.section-gradient::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3z' fill='%23ffffff' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.8;
}

.section-red {
    background: linear-gradient(135deg, var(--section-red) 0%, #f27474 100%);
    color: var(--white);
}

.section-blue-accent {
    position: relative;
}

.section-blue-accent::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--section-blue) 0%, var(--secondary-blue) 100%);
}

.section-yellow {
    background-color: rgba(249, 199, 79, 0.15);
    position: relative;
}

.section-green-accent {
    position: relative;
}

.section-green-accent::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--section-green) 0%, #6ad0b7 100%);
}

.section-purple {
    background: linear-gradient(135deg, var(--section-purple) 0%, #9a7fba 100%);
    color: var(--white);
}

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

.section-orange {
    background: linear-gradient(135deg, var(--primary-orange) 0%, var(--secondary-orange) 100%);
    color: var(--white);
}

/* ===== ヒーローセクション ===== */
.hero {
    padding-top: 8rem;
    padding-bottom: 6rem;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.hero-text {
    flex: 1;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    transform: translateY(20px);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0px);
    }
}

/* ===== 導入文セクション ===== */
.intro-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
    padding: 2rem 0;
}

.intro-text {
    flex: 3;
}

.intro-image {
    flex: 2;
    display: flex;
    justify-content: center;
}

.problem-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin: 2rem 0;
}

.card {
    background-color: var(--white);
    border-radius: var(--card-border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    flex: 1;
    min-width: 250px;
    transform: translateY(0);
    transition: all var(--transition-speed);
}

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

/* ===== 問題提起セクション ===== */
.problem-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
    padding: 3rem 0;
}

.problem-text {
    flex: 3;
}

.problem-image {
    flex: 2;
    display: flex;
    justify-content: center;
}

.quote {
    border-left: 4px solid var(--section-yellow);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
}

/* ===== 解決策セクション ===== */
.features {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 3rem 0;
}

.feature-card {
    background-color: var(--white);
    border-radius: var(--card-border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    flex: 1;
    min-width: 280px;
    text-align: center;
    transform: translateY(0);
    transition: all var(--transition-speed);
}

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

.icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.solution-summary {
    text-align: center;
    font-size: 1.2rem;
    margin-top: 2rem;
}

/* ===== オファーセクション ===== */
.checklist {
    list-style: none;
    margin: 2rem 0;
    text-align: left;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.checklist li {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.check {
    color: var(--white);
    margin-right: 0.5rem;
    font-weight: bold;
}

.reassurance {
    font-size: 1.2rem;
    margin: 2rem 0;
}

/* ===== 成果セクション ===== */
.benefit-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 3rem 0;
}

.benefit-card {
    background-color: var(--white);
    border-radius: var(--card-border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    flex: 1;
    min-width: 250px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transform: translateY(0);
    transition: all var(--transition-speed);
}

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

.card-accent-bar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
}

/* ===== FAQセクション ===== */
.faq-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--white);
    border-radius: var(--card-border-radius);
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-item summary {
    padding: 1.5rem;
    cursor: pointer;
    position: relative;
    font-weight: 700;
    list-style: none;
}

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

.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--primary-blue);
    transition: all var(--transition-speed);
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item p {
    padding: 0 1.5rem 1.5rem;
    margin: 0;
}

/* ===== 導入企業の声セクション ===== */
.testimonial-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 3rem 0;
}

.testimonial-card {
    background-color: var(--white);
    border-radius: var(--card-border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    flex: 1;
    min-width: 300px;
}

.company-info {
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.testimonial-card blockquote {
    font-style: italic;
    position: relative;
    padding-left: 1rem;
    border-left: 3px solid var(--section-blue);
}

/* ===== CTAセクション ===== */
.process-steps {
    max-width: 600px;
    margin: 2rem auto;
    text-align: left;
    counter-reset: step;
    list-style-type: none;
}

.process-steps li {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 1.5rem;
    counter-increment: step;
}

.process-steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 2rem;
    height: 2rem;
    background-color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--primary-orange);
}

/* ===== フッター ===== */
.site-footer-bottom {
    background-color: var(--dark-gray);
    color: var(--white);
    padding: 3rem 0;
}

.site-footer-bottom .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-nav a {
    color: var(--white);
    text-decoration: none;
    margin: 0 1rem;
}

.footer-nav a:hover {
    text-decoration: underline;
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ===== レスポンシブ対応 ===== */
@media (max-width: 992px) {
    html {
        font-size: 15px;
    }
    
    .hero-content, 
    .intro-content, 
    .problem-content {
        flex-direction: column;
    }
    
    .hero-image, 
    .intro-image, 
    .problem-image {
        order: -1;
    }
    
    .features, 
    .benefit-cards, 
    .testimonial-cards {
        flex-direction: column;
    }
    
    .feature-card, 
    .benefit-card, 
    .testimonial-card {
        width: 100%;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.7rem;
    }
    
    .container {
        padding: 0 1.5rem;
    }
    
    .problem-cards {
        flex-direction: column;
    }
    
    .card {
        width: 100%;
    }
    
    .section-divider {
        height: 40px;
    }
}

@media (max-width: 576px) {
    .site-header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero {
        padding-top: 10rem;
    }
    
    .btn-large {
        width: 100%;
    }
}

/* ===== プレースホルダー画像スタイル（実際の実装では削除） ===== */
[src^="placeholder_"] {
    background-color: #e0e0e0;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    font-weight: bold;
    border-radius: 8px;
}

[src="placeholder_hero.svg"] {
    min-height: 300px;
}

[src="placeholder_hero.svg"]::after {
    content: "ヒーローイメージ";
}

[src="placeholder_intro.svg"]::after {
    content: "導入イメージ";
}

[src="placeholder_problem.svg"]::after {
    content: "問題提起イメージ";
}