:root {
    --bg: #23242b;
    --bg-soft: #2b2c33;
    --line: rgba(255, 255, 255, 0.08);
    --line-strong: rgba(255, 255, 255, 0.14);
    --text: #f4f1ea;
    --text-soft: rgba(244, 241, 234, 0.72);
    --text-faint: rgba(244, 241, 234, 0.48);
    --accent: #d2a11f;
    --content-width: 1280px;
    --header-height: 88px;
}

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

html,
body {
    min-height: 100%;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: "Yu Mincho", "Hiragino Mincho ProN", "YuMincho", "Times New Roman", serif;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a,
a:visited,
a:hover,
a:active {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

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

button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
    background: transparent;
    border: none;
    outline: none;
}

.container {
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 48px;
}

/* =========================
   HEADER
========================= */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(35, 36, 43, 0.82);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
    z-index: 1000;
}

.header-inner {
    width: 100%;
    height: 100%;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    display: flex;
    flex-direction: column;
    line-height: 1;
    flex-shrink: 0;
}

.site-logo-main {
    font-size: 30px;
    letter-spacing: 0.03em;
    font-weight: 400;
    color: #fff;
}

.site-logo-sub {
    margin-top: 4px;
    font-size: 10px;
    font-family: Arial, Helvetica, sans-serif;
    font-weight: 700;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: #fff;
}

.site-nav ul {
    display: flex;
    align-items: center;
    gap: 48px;
}

.site-nav li {
    list-style: none;
}

.site-nav a {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.62);
    transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.is-active,
.site-nav a.nav-contact-link {
    color: var(--accent);
}

/* =========================
   COMMON PAGE BLOCKS
========================= */
.philosophy-hero,
.strengths-hero,
.services-hero,
.cases-hero,
.company-main,
.contact-hero,
.contact-form-section,
.philosophy-detail,
.strengths-cards,
.services-group,
.services-structure,
.cases-group,
.philosophy-next,
.strengths-next,
.services-next,
.cases-next,
.company-next {
    width: 100%;
}

.philosophy-hero-inner,
.strengths-hero-inner,
.services-hero-inner,
.cases-hero-inner,
.contact-hero-inner,
.philosophy-detail-inner,
.strengths-cards-inner,
.services-group-inner,
.services-structure-inner,
.cases-group-inner,
.company-main-inner,
.contact-form-inner,
.philosophy-next-inner,
.strengths-next-inner,
.services-next-inner,
.cases-next-inner,
.company-next-inner {
    max-width: var(--content-width);
    margin: 0 auto;
    padding-left: 48px;
    padding-right: 48px;
}

/* 上部見出しブロック */
.philosophy-hero,
.strengths-hero,
.services-hero,
.cases-hero,
.contact-hero {
    padding-top: 150px;
    padding-bottom: 72px;
    text-align: center;
}

.philosophy-label,
.strengths-label,
.services-label,
.cases-label,
.contact-label,
.company-label,
.services-structure-label {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.30em;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 28px;
}

.philosophy-title,
.strengths-title,
.services-title,
.cases-title,
.contact-title,
.company-title,
.services-structure-title {
    font-size: 74px;
    line-height: 1.35;
    font-weight: 400;
    letter-spacing: 0.01em;
    color: var(--text);
}

.philosophy-lead,
.strengths-lead,
.services-lead,
.cases-lead,
.contact-lead {
    max-width: 860px;
    margin: 28px auto 0;
    font-size: 18px;
    line-height: 1.9;
    color: var(--text-soft);
}

/* =========================
   TOP
========================= */
.top-hero {
    position: relative;
    height: 100vh;
    min-height: 860px;
    background: url("../images/hero-bg.jpg") center center / cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.top-hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(120, 125, 130, 0.22);
}

.top-hero-inner {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1280px;
    padding: 120px 32px 36px;
    transform: translateY(-18px);
}

.top-hero-title {
    font-size: 100px;
    line-height: 1.45;
    letter-spacing: 0.02em;
    font-weight: 400;
    color: var(--text);
}

.top-hero-subtitle {
    margin-top: 34px;
    font-size: 24px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.92);
}

.top-hero-line {
    width: 1px;
    height: 116px;
    background: var(--accent);
    margin: 42px auto 28px;
}

.top-hero-company {
    font-family: "Times New Roman", serif;
    font-size: 19px;
    letter-spacing: 0.20em;
    color: rgba(255, 255, 255, 0.72);
    text-transform: uppercase;
}

.top-next-section,
.philosophy-next,
.strengths-next,
.services-next,
.cases-next,
.company-next {
    border-top: 1px solid var(--line);
    padding: 82px 0 90px;
    text-align: center;
}

.top-next-link,
.philosophy-next-link,
.strengths-next-link,
.services-next-link,
.cases-next-link,
.company-next-link {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
}

.top-next-label,
.philosophy-next-label,
.strengths-next-label,
.services-next-label,
.cases-next-label,
.company-next-label {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.24em;
    color: var(--accent);
    text-transform: uppercase;
}

.top-next-title,
.philosophy-next-title,
.strengths-next-title,
.services-next-title,
.cases-next-title,
.company-next-title {
    margin-top: 16px;
    font-size: 58px;
    line-height: 1.2;
    font-weight: 400;
    color: var(--text);
}

.top-next-underline,
.philosophy-next-underline,
.strengths-next-underline,
.services-next-underline,
.cases-next-underline,
.company-next-underline {
    display: block;
    width: 82px;
    height: 1px;
    margin-top: 18px;
    background: var(--accent);
}

/* =========================
   PHILOSOPHY
========================= */
.philosophy-hero {
    border-bottom: 1px solid var(--line);
}

.philosophy-statement {
    max-width: 760px;
    margin: 28px auto 0;
    font-size: 22px;
    line-height: 1.8;
    color: var(--text);
}

.philosophy-divider {
    width: 62%;
    height: 1px;
    margin: 34px auto 0;
    background: var(--accent);
}

.philosophy-detail {
    padding: 88px 0 92px;
}

.philosophy-detail-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 88px;
    align-items: start;
}

.philosophy-detail-text h2 {
    font-size: 34px;
    line-height: 1.5;
    font-weight: 400;
    margin-bottom: 28px;
    color: var(--text);
}

.philosophy-detail-text p {
    font-size: 18px;
    line-height: 2;
    color: var(--text-soft);
}

.philosophy-detail-image img {
    width: 100%;
    max-width: 520px;
    margin-left: auto;
    filter: grayscale(100%);
}

/* =========================
   STRENGTHS
========================= */
.strengths-cards {
    padding: 34px 0 90px;
}

.strengths-cards-inner {
    display: flex;
    gap: 28px;
    align-items: stretch;
}

.strength-card {
    flex: 1;
    min-height: 320px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.015);
    padding: 42px 42px 38px;
    display: flex;
    flex-direction: column;
}

.strength-card-number {
    width: 80px;
    height: 80px;
    border: 1px solid var(--line-strong);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 34px;
    color: var(--accent);
    font-size: 26px;
    line-height: 1;
    font-weight: 700;
}

.strength-card-title {
    text-align: center;
    font-size: 28px;
    line-height: 1.55;
    font-weight: 400;
    margin-bottom: 22px;
    color: var(--text);
}

.strength-card-text {
    text-align: center;
    font-size: 18px;
    line-height: 2;
    color: var(--text-soft);
}

/* =========================
   SERVICES
========================= */
.services-group {
    padding: 12px 0 72px;
}

.services-group-title {
    position: relative;
    padding-left: 28px;
    margin-bottom: 38px;
    font-size: 30px;
    line-height: 1.5;
    font-weight: 400;
    color: var(--text);
}

.services-group-title::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.28em;
    width: 2px;
    height: 1.1em;
    background: var(--accent);
}

.services-card-grid {
    display: grid;
    gap: 32px;
}

.services-card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

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

.services-card {
    min-height: 340px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.015);
    padding: 34px 34px 30px;
}

.services-card-icon {
    color: var(--accent);
    font-size: 22px;
    line-height: 1;
    margin-bottom: 22px;
}

.services-card-title {
    font-size: 28px;
    line-height: 1.5;
    font-weight: 400;
    color: var(--text);
}

.services-card-subtitle {
    margin-top: 8px;
    font-size: 16px;
    line-height: 1.7;
    color: var(--accent);
    font-weight: 700;
}

.services-card-text {
    margin-top: 24px;
    font-size: 18px;
    line-height: 2;
    color: var(--text-soft);
}

.services-structure {
    padding: 8px 0 76px;
}

.services-structure-inner {
    border-top: 1px solid var(--line);
    padding-top: 72px;
}

.services-structure-title {
    margin-bottom: 42px;
}

.services-structure-flow {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.services-structure-step {
    border: 1px solid var(--line);
    padding: 28px 28px 26px;
    min-height: 220px;
}

.services-structure-step-num {
    display: inline-block;
    margin-bottom: 16px;
    color: var(--accent);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.20em;
}

.services-structure-step h3 {
    font-size: 24px;
    line-height: 1.55;
    font-weight: 400;
    margin-bottom: 14px;
}

.services-structure-step p {
    font-size: 17px;
    line-height: 1.95;
    color: var(--text-soft);
}

/* =========================
   CASES
========================= */
.cases-group {
    padding: 18px 0 72px;
}

.cases-group-title {
    position: relative;
    padding-left: 28px;
    margin-bottom: 34px;
    font-size: 30px;
    line-height: 1.5;
    font-weight: 400;
    color: var(--text);
}

.cases-group-title::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.28em;
    width: 2px;
    height: 1.1em;
    background: var(--accent);
}

.cases-card-grid {
    display: grid;
    gap: 30px;
}

.cases-card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.cases-card {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.015);
    padding: 30px 30px 28px;
    min-height: 360px;
}

.cases-card-category,
.cases-card-industry {
    color: var(--accent);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.10em;
}

.cases-card-industry {
    margin-top: 4px;
}

.cases-card-title {
    margin-top: 18px;
    font-size: 28px;
    line-height: 1.5;
    font-weight: 400;
    color: var(--text);
}

.cases-card-title-small {
    font-size: 24px;
}

.cases-card-scale {
    margin-top: 8px;
    font-size: 16px;
    color: var(--text-soft);
}

.cases-card-divider {
    height: 1px;
    background: var(--line);
    margin: 20px 0 22px;
}

.cases-card-text {
    font-size: 18px;
    line-height: 1.95;
    color: var(--text-soft);
}

/* =========================
   COMPANY
========================= */
.company-main {
    padding: 150px 0 78px;
}

.company-main-inner {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 72px;
    align-items: start;
}

.company-title {
    margin-bottom: 34px;
    text-align: left;
}

.company-table {
    border-top: 1px solid var(--line);
}

.company-row {
    display: grid;
    grid-template-columns: 190px 1fr;
    gap: 28px;
    padding: 28px 0;
    border-bottom: 1px solid var(--line);
}

.company-key {
    font-size: 16px;
    color: var(--text-faint);
}

.company-value {
    font-size: 18px;
    line-height: 1.9;
    color: var(--text);
}

.company-access-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--line);
    padding: 48px 48px 44px;
    min-height: 576px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.company-access-title {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: var(--text-faint);
    margin-bottom: 28px;
}

.company-access-text {
    font-size: 18px;
    line-height: 2;
    color: var(--text-soft);
}

.company-access-link {
    margin-top: 32px;
    font-size: 16px;
    color: var(--accent);
}

/* =========================
   CONTACT
========================= */
.contact-form-section {
    padding: 18px 0 110px;
}

.contact-form-inner {
    max-width: 860px;
    margin: 0 auto;
}

.contact-form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.contact-form-group {
    margin-bottom: 38px;
}

.contact-form-label {
    display: block;
    margin-bottom: 18px;
    font-size: 16px;
    color: var(--text-soft);
}

.contact-form-label span {
    color: var(--accent);
}

.contact-form-input,
.contact-form-select,
.contact-form-textarea {
    width: 100%;
    border-bottom: 1px solid var(--line-strong);
    padding: 0 0 14px;
    font-size: 17px;
    line-height: 1.8;
    color: var(--text);
    background: transparent;
}

.contact-form-input::placeholder,
.contact-form-textarea::placeholder {
    color: var(--text-faint);
}

.contact-form-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image:
        linear-gradient(45deg, transparent 50%, var(--text-faint) 50%),
        linear-gradient(135deg, var(--text-faint) 50%, transparent 50%);
    background-position:
        calc(100% - 16px) calc(50% - 2px),
        calc(100% - 10px) calc(50% - 2px);
    background-size: 6px 6px, 6px 6px;
    background-repeat: no-repeat;
    padding-right: 40px;
}

.contact-form-textarea {
    min-height: 140px;
    resize: vertical;
    border-top: none;
}

.contact-form-submit {
    margin-top: 34px;
}

.contact-submit-button {
    width: 100%;
    height: 94px;
    background: #f2b705;
    color: #1f2027;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.contact-submit-button:hover {
    opacity: 0.92;
}

/* =========================
   THANKS
========================= */
.thanks-section {
    min-height: 100vh;
    padding: 150px 20px 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.thanks-inner {
    max-width: 760px;
    margin: 0 auto;
}

.thanks-icon {
    width: 78px;
    height: 78px;
    margin: 0 auto 34px;
    border: 6px solid #f2b705;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #f2b705;
    font-size: 36px;
    font-family: Arial, Helvetica, sans-serif;
    font-weight: 700;
    line-height: 1;
}

.thanks-title {
    font-size: 74px;
    line-height: 1.35;
    font-weight: 400;
    color: var(--text);
}

.thanks-text {
    margin-top: 28px;
    font-size: 22px;
    line-height: 1.95;
    color: var(--text-soft);
}

.thanks-back {
    margin-top: 54px;
}

.thanks-back-link {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: var(--accent);
}

/* =========================
   RESPONSIVE
========================= */
@media (max-width: 1200px) {
    .site-nav ul {
        gap: 30px;
    }

    .top-hero-title {
        font-size: 78px;
    }

    .philosophy-title,
    .strengths-title,
    .services-title,
    .cases-title,
    .contact-title,
    .company-title,
    .services-structure-title,
    .thanks-title {
        font-size: 58px;
    }

    .strengths-cards-inner,
    .services-card-grid-3,
    .cases-card-grid-3,
    .services-structure-flow {
        gap: 22px;
    }
}

@media (max-width: 960px) {
    .header-inner {
        height: auto;
        padding: 20px 24px;
        flex-direction: column;
        gap: 18px;
    }

    .site-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px 22px;
    }

    .container,
    .philosophy-hero-inner,
    .strengths-hero-inner,
    .services-hero-inner,
    .cases-hero-inner,
    .contact-hero-inner,
    .philosophy-detail-inner,
    .strengths-cards-inner,
    .services-group-inner,
    .services-structure-inner,
    .cases-group-inner,
    .company-main-inner,
    .contact-form-inner,
    .philosophy-next-inner,
    .strengths-next-inner,
    .services-next-inner,
    .cases-next-inner,
    .company-next-inner {
        padding-left: 28px;
        padding-right: 28px;
    }

    .top-hero-title {
        font-size: 58px;
        line-height: 1.36;
    }

    .top-hero-subtitle {
        font-size: 18px;
    }

    .top-next-title,
    .philosophy-next-title,
    .strengths-next-title,
    .services-next-title,
    .cases-next-title,
    .company-next-title {
        font-size: 40px;
    }

    .philosophy-detail-inner,
    .company-main-inner,
    .contact-form-grid,
    .services-card-grid-2,
    .services-card-grid-3,
    .cases-card-grid-3,
    .services-structure-flow,
    .strengths-cards-inner {
        grid-template-columns: 1fr;
        display: grid;
    }

    .strength-card,
    .services-card,
    .cases-card,
    .services-structure-step {
        min-height: auto;
    }

    .company-access-card {
        min-height: auto;
    }

    .company-title,
    .philosophy-title,
    .strengths-title,
    .services-title,
    .cases-title,
    .contact-title,
    .services-structure-title,
    .thanks-title {
        font-size: 50px;
    }

    .company-row {
        grid-template-columns: 1fr;
        gap: 10px;
    }
}

@media (max-width: 640px) {
    .site-logo-main {
        font-size: 24px;
    }

    .site-logo-sub {
        font-size: 9px;
    }

    .top-hero-title {
        font-size: 42px;
    }

    .top-hero-subtitle {
        font-size: 14px;
    }

    .philosophy-title,
    .strengths-title,
    .services-title,
    .cases-title,
    .contact-title,
    .company-title,
    .services-structure-title,
    .thanks-title {
        font-size: 40px;
    }

    .philosophy-lead,
    .strengths-lead,
    .services-lead,
    .cases-lead,
    .contact-lead,
    .philosophy-detail-text p,
    .strength-card-text,
    .services-card-text,
    .cases-card-text,
    .company-value,
    .company-access-text,
    .thanks-text {
        font-size: 16px;
    }

    .top-next-title,
    .philosophy-next-title,
    .strengths-next-title,
    .services-next-title,
    .cases-next-title,
    .company-next-title {
        font-size: 32px;
    }

    .contact-submit-button {
        height: 78px;
        font-size: 16px;
        letter-spacing: 0.20em;
    }

    .thanks-icon {
        width: 64px;
        height: 64px;
        font-size: 30px;
        border-width: 5px;
    }
}