/* ================================================
   Design System - REFINED
   圧倒的な威厳と「22年の狂気」を可視化
   ================================================ */

:root {
    /* Colors - 漆黒×箔押しゴールド */
    --deep-black: #000000;
    --rich-black: #0a0a0a;
    --shadow-black: #050505;
    --champagne-gold: #C5A059;
    --gold-light: #D4AF37;
    --gold-dark: #8B7355;
    --pure-white: #FFFFFF;
    --accent-red: rgba(139, 0, 0, 0.08);

    /* Typography - 洗練 */
    --font-serif: 'Shippori Mincho', serif;
    --font-sans: 'Noto Sans JP', sans-serif;

    /* Spacing - Ma（間）を作る */
    --section-padding: 200px;
    /* 80px → 200px */
    --section-padding-mobile: 120px;
    /* 50px → 120px */
    --max-width: 1200px;

    /* Letter/Line Spacing */
    --letter-spacing-heading: 0.15em;
    --letter-spacing-body: 0.08em;
    --line-height-heading: 1.8;
    --line-height-body: 2.5;

    /* Transitions */
    --transition-smooth: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ================================================
   Reset & Base
   ================================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--deep-black);
    color: var(--pure-white);
    line-height: var(--line-height-body);
    font-weight: 300;
    /* 400 → 300 */
    letter-spacing: var(--letter-spacing-body);
    overflow-x: hidden;

    /* 微細なテクスチャ */
    background-image:
        radial-gradient(circle at 20% 50%, rgba(197, 160, 89, 0.03) 0%, transparent 50%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="4" stitchTiles="stitch"/></filter><rect width="100" height="100" filter="url(%23noise)" opacity="0.03"/></svg>');
}

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

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

/* ================================================
   Header
   ================================================ */

.site-header {
    position: sticky;
    top: 0;
    background-color: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(197, 160, 89, 0.25);
    padding: 25px 50px;
    /* 20px 40px → 25px 50px */
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.8);
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    /* 1.5rem → 1.6rem */
    font-weight: 400;
    /* 600 → 400 */
    letter-spacing: 0.15em;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 40px;
    /* 30px → 40px */
}

.header-title {
    font-size: 0.9rem;
    /* 0.85rem → 0.9rem */
    color: rgba(255, 255, 255, 0.7);
    font-weight: 300;
    letter-spacing: 0.08em;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--gold-light), var(--champagne-gold), var(--gold-dark));
    color: var(--deep-black);
    border: none;
    padding: 14px 35px;
    /* 12px 30px → 14px 35px */
    font-family: var(--font-sans);
    font-weight: 600;
    letter-spacing: 0.1em;
    transition: var(--transition-smooth);
    cursor: pointer;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        0 4px 15px rgba(197, 160, 89, 0.3);
}

.cta-button:hover {
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.4),
        0 6px 25px rgba(197, 160, 89, 0.5);
    transform: translateY(-3px);
}

.cta-button:active {
    transform: translateY(-1px);
}

.cta-button-small {
    padding: 12px 25px;
    font-size: 0.9rem;
}

.cta-button-large {
    padding: 24px 60px;
    /* 20px 50px → 24px 60px */
    font-size: 1.2rem;
    /* 1.1rem → 1.2rem */
    font-weight: 700;
}

/* ================================================
   Hero Section - 数字の神格化
   ================================================ */

.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 140px 50px 120px;
    /* 100px 40px 80px → 140px 50px 120px */
    position: relative;
    background:
        radial-gradient(circle at 50% 30%, rgba(197, 160, 89, 0.06) 0%, transparent 60%),
        var(--deep-black);
}

.hero-container {
    max-width: var(--max-width);
    width: 100%;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 80px;
    /* 60px → 80px */
    align-items: center;
}

.hero-content {
    animation: fadeInUp 1.2s ease-out;
}

.hero-headline {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    /* 3rem → 3.5rem */
    line-height: var(--line-height-heading);
    font-weight: 300;
    /* 600 → 300: 洗練 */
    margin-bottom: 80px;
    /* 30px → 80px: Ma（間） */
    letter-spacing: var(--letter-spacing-heading);
}

/* 数字を巨大化（画面の30-50%） */
.hero-number {
    display: inline-block;
    background: linear-gradient(135deg, var(--gold-light), var(--champagne-gold), var(--gold-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 200;
    font-size: 6rem;
    /* 1.1em → 6rem: 巨大化 */
    font-family: var(--font-serif);
    letter-spacing: 0.05em;
    filter: drop-shadow(0 4px 20px rgba(197, 160, 89, 0.6));
}

.hero-emphasis {
    color: var(--champagne-gold);
    font-style: normal;
}

.hero-subheadline {
    font-size: 1.6rem;
    /* 1.5rem → 1.6rem */
    margin-bottom: 60px;
    /* 30px → 60px */
    font-weight: 400;
    /* 500 → 400 */
    line-height: 2.2;
    letter-spacing: 0.08em;
}

.hero-description {
    font-size: 1.1rem;
    /* 1rem → 1.1rem */
    color: rgba(255, 255, 255, 0.8);
    line-height: 2.5;
    letter-spacing: 0.05em;
}

.hero-image {
    position: relative;
    animation: fadeIn 1.8s ease-out;
}

.hero-image img {
    width: 100%;
    height: auto;
    filter: grayscale(30%) contrast(1.15);
    border: 1px solid var(--champagne-gold);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.7);
}

.scroll-indicator {
    position: absolute;
    bottom: 60px;
    /* 40px → 60px */
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2.5s infinite;
}

.scroll-arrow {
    font-size: 2.2rem;
    /* 2rem → 2.2rem */
    color: var(--champagne-gold);
}

/* ================================================
   Numbers Section - カードと数字を巨大化
   ================================================ */

.numbers-section {
    padding: var(--section-padding) 50px;
    background:
        radial-gradient(circle at center, var(--rich-black) 0%, var(--deep-black) 100%);
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.numbers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 50px;
    /* 30px → 50px: Ma（間） */
}

.number-card {
    background: linear-gradient(135deg, rgba(197, 160, 89, 0.06), rgba(10, 10, 10, 0.9));
    border: 1px solid rgba(197, 160, 89, 0.3);
    padding: 70px 40px;
    /* 40px 30px → 70px 40px */
    text-align: center;
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(40px);
    box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.5);
}

.number-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.number-card:hover {
    border-color: var(--champagne-gold);
    box-shadow:
        0 0 40px rgba(197, 160, 89, 0.4),
        inset 0 0 50px rgba(197, 160, 89, 0.08);
    transform: translateY(-15px);
}

/* 数字を3倍に */
.number-value {
    font-family: var(--font-serif);
    font-size: 4.5rem;
    /* 2.5rem → 4.5rem: 3倍 */
    font-weight: 200;
    /* 900 → 200: 洗練 */
    background: linear-gradient(135deg, var(--gold-light), var(--champagne-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 30px;
    /* 20px → 30px */
    letter-spacing: 0.05em;
    filter: drop-shadow(0 2px 15px rgba(197, 160, 89, 0.5));
}

.number-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    /* 1rem → 1.1rem */
    line-height: 2;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.08em;
}

/* ================================================
   Paradigm Shift Section
   ================================================ */

.paradigm-section {
    padding: var(--section-padding) 50px;
    background-color: var(--rich-black);
}

.paradigm-container {
    max-width: 1000px;
    /* 900px → 1000px */
    margin: 0 auto;
    text-align: center;
}

.paradigm-content {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

.paradigm-content.visible {
    opacity: 1;
    transform: translateY(0);
}

.paradigm-text {
    font-family: var(--font-sans);
    font-size: 2rem;
    /* 1.8rem → 2rem */
    line-height: 2.5;
    margin-bottom: 80px;
    /* 40px → 80px */
    font-weight: 300;
    /* 400 → 300 */
    letter-spacing: 0.08em;
}

.paradigm-emphasis {
    font-size: 2.5rem;
    /* 2rem → 2.5rem */
    font-weight: 600;
    /* 700 → 600 */
    color: var(--champagne-gold);
}

/* ================================================
   Chronology Section - 余白拡大
   ================================================ */

.chronology-section {
    padding: var(--section-padding) 50px;
}

.section-heading {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    /* 2.5rem → 2.8rem */
    text-align: center;
    margin-bottom: 120px;
    /* 60px → 120px: Ma（間） */
    color: var(--champagne-gold);
    font-weight: 400;
    /* 600 → 400 */
    letter-spacing: 0.15em;
}

.timeline {
    position: relative;
    padding-left: 70px;
    /* 60px → 70px */
}

.timeline::before {
    content: '';
    position: absolute;
    left: 25px;
    /* 20px → 25px */
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--champagne-gold), rgba(197, 160, 89, 0.2));
}

.timeline-item {
    position: relative;
    margin-bottom: 150px;
    /* 80px → 150px: Ma（間） */
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.timeline-marker {
    position: absolute;
    left: -54px;
    /* -48px → -54px */
    top: 25px;
    /* 20px → 25px */
    width: 18px;
    /* 16px → 18px */
    height: 18px;
    background: radial-gradient(circle, var(--champagne-gold), var(--gold-dark));
    border: 3px solid var(--rich-black);
    border-radius: 50%;
    box-shadow:
        0 0 0 5px rgba(197, 160, 89, 0.25),
        0 4px 15px rgba(197, 160, 89, 0.5);
}

.timeline-content {
    display: grid;
    grid-template-columns: 350px 1fr;
    /* 300px → 350px */
    gap: 60px;
    /* 40px → 60px */
    align-items: start;
}

.timeline-image img {
    width: 100%;
    height: 280px;
    /* 250px → 280px */
    object-fit: cover;
    filter: grayscale(60%) contrast(1.2);
    border: 1px solid rgba(197, 160, 89, 0.3);
    box-shadow:
        inset 0 0 40px rgba(0, 0, 0, 0.6),
        0 8px 30px rgba(0, 0, 0, 0.6);
}

.timeline-title {
    font-family: var(--font-serif);
    font-size: 1.7rem;
    /* 1.5rem → 1.7rem */
    color: var(--champagne-gold);
    margin-bottom: 25px;
    /* 15px → 25px */
    font-weight: 400;
    /* 600 → 400 */
    letter-spacing: 0.1em;
}

.timeline-description {
    font-size: 1.15rem;
    /* 1.1rem → 1.15rem */
    line-height: 2.5;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.05em;
    font-weight: 300;
}

/* ================================================
   Methodology Section
   ================================================ */

.methodology-section {
    padding: var(--section-padding) 50px;
    background:
        radial-gradient(circle at top, var(--rich-black) 0%, var(--deep-black) 100%);
}

.methodology-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 60px;
    /* 40px → 60px */
    margin-bottom: 140px;
    /* 80px → 140px */
}

.methodology-card {
    text-align: center;
    padding: 60px 30px;
    /* 40px 20px → 60px 30px */
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    background: linear-gradient(135deg, rgba(197, 160, 89, 0.04), rgba(10, 10, 10, 0.8));
    border: 1px solid rgba(197, 160, 89, 0.2);
    box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.5);
}

.methodology-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.methodology-icon {
    margin-bottom: 40px;
    /* 30px → 40px */
    display: flex;
    justify-content: center;
}

.methodology-title {
    font-family: var(--font-serif);
    font-size: 1.7rem;
    /* 1.5rem → 1.7rem */
    color: var(--champagne-gold);
    margin-bottom: 30px;
    /* 20px → 30px */
    font-weight: 400;
    /* 600 → 400 */
    letter-spacing: 0.1em;
}

.methodology-description {
    font-size: 1.1rem;
    /* 1rem → 1.1rem */
    line-height: 2.2;
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 0.05em;
    font-weight: 300;
}

.methodology-diagram {
    margin-top: 100px;
    /* 60px → 100px */
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 1s ease-out, transform 1s ease-out;
}

.methodology-diagram.visible {
    opacity: 1;
    transform: scale(1);
}

.fusion-diagram {
    width: 100%;
    max-width: 900px;
    /* 800px → 900px */
    margin: 0 auto;
    display: block;
}

.fusion-diagram text {
    font-family: var(--font-sans);
}

/* ================================================
   Proof Section
   ================================================ */

.proof-section {
    padding: var(--section-padding) 50px;
}

.testimonials-slider {
    max-width: 1000px;
    /* 900px → 1000px */
    margin: 0 auto;
    position: relative;
}

.testimonials-container {
    position: relative;
    min-height: 550px;
    /* 500px → 550px */
}

.testimonial-card {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.6s ease-in-out;
    background: linear-gradient(135deg, rgba(197, 160, 89, 0.06), rgba(10, 10, 10, 0.9));
    border: 1px solid rgba(197, 160, 89, 0.3);
    padding: 70px;
    /* 50px → 70px */
    box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.5);
}

.testimonial-card.active {
    opacity: 1;
    visibility: visible;
    position: relative;
}

.testimonial-image {
    width: 140px;
    /* 120px → 140px */
    height: 140px;
    margin: 0 auto 40px;
    /* 30px → 40px */
}

.testimonial-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    filter: grayscale(40%);
    border: 3px solid var(--champagne-gold);
    box-shadow: 0 0 30px rgba(197, 160, 89, 0.4);
}

.testimonial-result {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    /* 1.5rem → 1.8rem */
    color: var(--champagne-gold);
    text-align: center;
    margin-bottom: 40px;
    /* 30px → 40px */
    font-weight: 400;
    /* 600 → 400 */
    line-height: 2;
    letter-spacing: 0.08em;
}

.testimonial-text {
    font-size: 1.2rem;
    /* 1.1rem → 1.2rem */
    line-height: 2.5;
    text-align: center;
    margin-bottom: 40px;
    /* 30px → 40px */
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.05em;
    font-weight: 300;
}

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

.author-name {
    font-weight: 600;
    /* 700 → 600 */
    font-size: 1.2rem;
    /* 1.1rem → 1.2rem */
    margin-bottom: 8px;
    /* 5px → 8px */
    letter-spacing: 0.08em;
}

.author-role {
    font-size: 1rem;
    /* 0.95rem → 1rem */
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.05em;
}

.slider-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    /* 30px → 40px */
    margin-top: 60px;
    /* 40px → 60px */
}

.slider-arrow {
    background-color: transparent;
    border: 2px solid var(--champagne-gold);
    color: var(--champagne-gold);
    width: 60px;
    /* 50px → 60px */
    height: 60px;
    font-size: 1.6rem;
    /* 1.5rem → 1.6rem */
    cursor: pointer;
    transition: var(--transition-smooth);
}

.slider-arrow:hover {
    background: linear-gradient(135deg, var(--champagne-gold), var(--gold-light));
    color: var(--deep-black);
    box-shadow: 0 0 30px rgba(197, 160, 89, 0.5);
}

.slider-dots {
    display: flex;
    gap: 15px;
    /* 12px → 15px */
}

.dot {
    width: 14px;
    /* 12px → 14px */
    height: 14px;
    border-radius: 50%;
    background-color: rgba(197, 160, 89, 0.3);
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.dot.active {
    background-color: var(--champagne-gold);
    transform: scale(1.4);
    box-shadow: 0 0 15px rgba(197, 160, 89, 0.6);
}

/* ================================================
   Final CTA Section
   ================================================ */

.final-section {
    padding: var(--section-padding) 50px;
    background: linear-gradient(135deg, var(--rich-black) 0%, rgba(139, 0, 0, 0.08) 50%, var(--rich-black) 100%);
    position: relative;
}

.final-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, var(--accent-red) 0%, transparent 70%);
    opacity: 0.3;
    pointer-events: none;
}

.final-container {
    max-width: 1000px;
    /* 900px → 1000px */
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

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

.final-heading {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    /* 2.5rem → 2.8rem */
    color: var(--champagne-gold);
    margin-bottom: 80px;
    /* 40px → 80px */
    font-weight: 400;
    /* 600 → 400 */
    letter-spacing: 0.15em;
}

.final-message {
    font-family: var(--font-serif);
    font-size: 2rem;
    /* 1.8rem → 2rem */
    line-height: 2.5;
    margin-bottom: 60px;
    /* 30px → 60px */
    font-weight: 300;
    /* 400 → 300 */
    letter-spacing: 0.08em;
}

.final-guarantee {
    font-size: 1.3rem;
    /* 1.2rem → 1.3rem */
    line-height: 2.5;
    margin-bottom: 100px;
    /* 50px → 100px */
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.05em;
}

.signature-area {
    margin: 100px 0;
    /* 50px → 100px */
    display: flex;
    justify-content: center;
}

.signature-placeholder {
    padding: 40px 80px;
    /* 30px 60px → 40px 80px */
    border-bottom: 2px solid var(--champagne-gold);
}

.signature-text {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    /* 2rem → 2.5rem */
    color: var(--champagne-gold);
    font-style: italic;
    font-weight: 300;
    letter-spacing: 0.1em;
}

.cta-notes {
    margin-top: 50px;
    /* 30px → 50px */
    font-size: 1rem;
    /* 0.9rem → 1rem */
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.05em;
}

.cta-notes p {
    margin-bottom: 12px;
    /* 8px → 12px */
}

/* ================================================
   Footer
   ================================================ */

.site-footer {
    padding: 60px 30px;
    /* 40px 20px → 60px 30px */
    text-align: center;
    border-top: 1px solid rgba(197, 160, 89, 0.2);
    font-size: 0.9rem;
    /* 0.85rem → 0.9rem */
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 0.08em;
    background-color: var(--deep-black);
}

/* ================================================
   Animations
   ================================================ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-25px);
    }

    60% {
        transform: translateX(-50%) translateY(-12px);
    }
}

/* ================================================
   Responsive Design
   ================================================ */

@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .hero-headline {
        font-size: 3rem;
    }

    .hero-number {
        font-size: 5rem;
    }

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

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

    .timeline-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 100px;
        /* 50px → 100px */
    }

    .site-header {
        padding: 20px 25px;
    }

    .header-container {
        flex-direction: column;
        gap: 20px;
    }

    .header-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .header-title {
        font-size: 0.8rem;
    }

    .hero-section {
        padding: 100px 30px 80px;
    }

    .hero-headline {
        font-size: 2.5rem;
    }

    .hero-number {
        font-size: 4rem;
    }

    .hero-subheadline {
        font-size: 1.3rem;
    }

    .numbers-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .number-value {
        font-size: 3.5rem;
    }

    .section-heading {
        font-size: 2.2rem;
        margin-bottom: 80px;
    }

    .timeline {
        padding-left: 50px;
    }

    .timeline-marker {
        left: -38px;
    }

    .timeline-item {
        margin-bottom: 100px;
    }

    .paradigm-text {
        font-size: 1.6rem;
    }

    .paradigm-emphasis {
        font-size: 2rem;
    }

    .methodology-card {
        padding: 50px 25px;
    }

    .final-heading {
        font-size: 2.2rem;
    }

    .final-message {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .hero-headline {
        font-size: 2rem;
    }

    .hero-number {
        font-size: 3rem;
    }

    .number-value {
        font-size: 2.8rem;
    }
}