/* ==========================================================
   株式会社AIUEON 共通スタイル
   落ち着いた雰囲気:深い藍 × 生成りの紙色 × 金茶の差し色
   見出しは明朝体、本文はやわらかいゴシック体
   ========================================================== */

:root {
    --paper: #f6f3ec;
    /* 生成りの紙色 */
    --white: #ffffff;
    --ink: #2b2e38;
    /* 本文の墨色 */
    --ink-soft: #5a5e6a;
    --navy: #1d2a44;
    /* 深い藍 */
    --navy-deep: #141d31;
    /* さらに濃い藍 */
    --accent: #33518e;
    /* 藍の差し色 */
    --gold: #b3934f;
    /* 金茶の差し色 */
    --line: #e2dccd;
    /* 罫線 */
    --serif: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
    --sans: "Zen Kaku Gothic New", "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--sans);
    font-size: 17px;
    color: var(--ink);
    line-height: 2;
    letter-spacing: 0.04em;
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
    transition: opacity 0.25s ease, color 0.25s ease,
        background-color 0.25s ease, border-color 0.25s ease;
}

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

.container {
    width: 90%;
    max-width: 1080px;
    margin: 0 auto;
}

/* ----------------------------------------------------------
   ヘッダー
   ---------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid var(--line);
}

.header-inner {
    width: 92%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 16px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.logo {
    margin: 0;
    line-height: 1;
}

.logo img {
    height: 38px;
    width: auto;
    display: block;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 30px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-list a {
    display: inline-block;
    padding: 6px 0;
    font-size: 15px;
    letter-spacing: 0.08em;
    color: var(--ink);
    border-bottom: 1px solid transparent;
}

.nav-list a:hover,
.nav-list a.is-current {
    color: var(--accent);
    border-bottom-color: var(--gold);
}

.nav-list .nav-contact a {
    padding: 9px 22px;
    border: 1px solid var(--navy);
    color: var(--navy);
    border-radius: 2px;
}

.nav-list .nav-contact a:hover {
    background-color: var(--navy);
    color: var(--white);
    border-bottom-color: var(--navy);
}

/* 開閉ボタン(スマホ用) */
.nav-toggle {
    display: none;
    position: relative;
    z-index: 120;
    width: 44px;
    height: 44px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 1.5px;
    margin: 6px auto;
    background-color: var(--navy);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* ----------------------------------------------------------
   ホームの主要画面
   ---------------------------------------------------------- */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 640px;
    background-image:
        linear-gradient(100deg,
            rgba(246, 243, 236, 0.96) 0%,
            rgba(246, 243, 236, 0.85) 42%,
            rgba(246, 243, 236, 0.25) 75%,
            rgba(246, 243, 236, 0.05) 100%),
        url("../images/mainvisual.png");
    background-size: cover;
    background-position: center right;
    background-repeat: no-repeat;
}

.hero-inner {
    width: 90%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 90px 0;
}

.hero-tag {
    display: inline-block;
    margin: 0 0 26px;
    padding: 6px 14px;
    font-size: 14px;
    letter-spacing: 0.14em;
    color: var(--navy);
    border: 1px solid var(--gold);
    background-color: rgba(255, 255, 255, 0.6);
}

.hero-catch {
    margin: 0 0 28px;
    font-family: var(--serif);
    font-size: 44px;
    font-weight: 600;
    line-height: 1.7;
    letter-spacing: 0.08em;
    color: var(--navy);
    max-width: 640px;
}

.hero-lead {
    margin: 0;
    font-size: 17px;
    line-height: 2.2;
    color: var(--ink);
    max-width: 540px;
}

.hero-line {
    display: block;
    width: 64px;
    height: 1px;
    margin: 34px 0 0;
    background-color: var(--gold);
}

/* ----------------------------------------------------------
   区切りごとの共通
   ---------------------------------------------------------- */
.section {
    padding: 100px 0;
}

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

.sec-head {
    display: flex;
    align-items: baseline;
    gap: 20px;
    margin-bottom: 18px;
}

.sec-num {
    font-family: var(--serif);
    font-size: 16px;
    letter-spacing: 0.2em;
    color: var(--navy);
}

.sec-head h2 {
    margin: 0;
    font-family: var(--serif);
    font-size: 30px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--navy);
}

.sec-lead {
    margin: 0 0 56px;
    padding-left: 55px;
    font-size: 16px;
    color: var(--ink-soft);
}

.sec-lead::before {
    content: "";
}

/* ----------------------------------------------------------
   三つの約束
   ---------------------------------------------------------- */
.promise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.promise {
    padding: 40px 32px;
    background-color: var(--white);
    border-top: 2px solid var(--gold);
    box-shadow: 0 2px 20px rgba(29, 42, 68, 0.05);
}

.promise-num {
    display: block;
    margin-bottom: 14px;
    font-family: var(--serif);
    font-size: 30px;
    line-height: 1;
    color: var(--gold);
}

.promise h3 {
    margin: 0 0 14px;
    font-family: var(--serif);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--navy);
}

.promise p {
    margin: 0;
    font-size: 16px;
    line-height: 2;
    color: var(--ink-soft);
}

/* ----------------------------------------------------------
   支援内容の一覧
   ---------------------------------------------------------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.card {
    padding: 42px 32px;
    background-color: var(--white);
    border: 1px solid var(--line);
    border-radius: 2px;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
    box-shadow: 0 10px 30px rgba(29, 42, 68, 0.08);
    transform: translateY(-3px);
}

.card h3 {
    margin: 0 0 16px;
    padding-bottom: 14px;
    font-family: var(--serif);
    font-size: 19px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--navy);
    border-bottom: 1px solid var(--line);
    position: relative;
}

.card h3::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 36px;
    height: 1px;
    background-color: var(--gold);
}

.card p {
    margin: 0;
    font-size: 16px;
    line-height: 2;
    color: var(--ink-soft);
}

/* ----------------------------------------------------------
   ご相談の流れ
   ---------------------------------------------------------- */
.flow-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    counter-reset: flow;
}

.flow-step {
    position: relative;
    padding: 44px 32px 36px;
    background-color: var(--white);
    border: 1px solid var(--line);
}

.flow-num {
    position: absolute;
    top: -16px;
    left: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    font-family: var(--serif);
    font-size: 17px;
    color: var(--white);
    background-color: var(--navy);
    border-radius: 50%;
}

.flow-step h3 {
    margin: 0 0 12px;
    font-family: var(--serif);
    font-size: 18px;
    font-weight: 600;
    color: var(--navy);
}

.flow-step p {
    margin: 0;
    font-size: 16px;
    line-height: 2;
    color: var(--ink-soft);
}

/* ----------------------------------------------------------
   表(会社概要など)
   ---------------------------------------------------------- */
.company-table {
    width: 100%;
    border-collapse: collapse;
    background-color: transparent;
}

.company-table th,
.company-table td {
    padding: 22px 16px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
    font-size: 16px;
}

.company-table tr:first-child th,
.company-table tr:first-child td {
    border-top: 1px solid var(--navy);
}

.company-table th {
    width: 25%;
    font-family: var(--serif);
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--navy);
    white-space: nowrap;
}

.officer-row {
    margin-bottom: 6px;
}

.officer-title {
    display: inline-block;
    width: 9em;
    color: var(--ink-soft);
}

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

.simple-list li {
    padding-left: 1.2em;
    position: relative;
}

.simple-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.95em;
    width: 6px;
    height: 1px;
    background-color: var(--gold);
}

/* ----------------------------------------------------------
   箇条書きの共通
   ---------------------------------------------------------- */
.dot-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.dot-list li {
    position: relative;
    padding: 14px 0 14px 26px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
}

.dot-list li::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 1.55em;
    width: 8px;
    height: 8px;
    border: 1px solid var(--gold);
    transform: rotate(45deg);
}

/* ----------------------------------------------------------
   お知らせ
   ---------------------------------------------------------- */
.news-list {
    margin: 0;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--navy);
}

.news-list li {
    display: flex;
    gap: 32px;
    padding: 22px 8px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
}

.news-list time {
    flex-shrink: 0;
    width: 110px;
    font-family: var(--serif);
    letter-spacing: 0.06em;
    color: var(--navy);
}

/* ----------------------------------------------------------
   ボタン・リンク
   ---------------------------------------------------------- */
.more-link {
    margin-top: 44px;
    text-align: center;
}

.btn {
    display: inline-block;
    min-width: 240px;
    padding: 14px 40px;
    font-size: 15px;
    letter-spacing: 0.12em;
    text-align: center;
    color: var(--navy);
    border: 1px solid var(--navy);
    background-color: transparent;
    border-radius: 2px;
}

.btn:hover {
    background-color: var(--navy);
    color: var(--white);
}

.btn--solid {
    background-color: var(--navy);
    color: var(--white);
}

.btn--solid:hover {
    background-color: var(--accent);
    border-color: var(--accent);
}

.btn--ghost {
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.7);
}

.btn--ghost:hover {
    background-color: var(--white);
    color: var(--navy);
    border-color: var(--white);
}

/* ----------------------------------------------------------
   お問い合わせへの誘い
   ---------------------------------------------------------- */
.cta {
    padding: 110px 0;
    text-align: center;
    color: var(--white);
    background-color: var(--navy);
    background-image:
        radial-gradient(circle at 85% 20%, rgba(179, 147, 79, 0.14) 0%, transparent 45%),
        radial-gradient(circle at 10% 90%, rgba(51, 81, 142, 0.5) 0%, transparent 55%);
}

.cta h2 {
    margin: 0 0 22px;
    font-family: var(--serif);
    font-size: 30px;
    font-weight: 600;
    letter-spacing: 0.12em;
}

.cta p {
    margin: 0 0 40px;
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
}

.cta .cta-note {
    margin-top: 24px;
    margin-bottom: 0;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

/* ----------------------------------------------------------
   下層ページの題字
   ---------------------------------------------------------- */
.page-title {
    padding: 90px 0 70px;
    background-color: var(--paper);
    border-bottom: 1px solid var(--line);
}

.page-title h1 {
    margin: 0;
    font-family: var(--serif);
    font-size: 36px;
    font-weight: 600;
    letter-spacing: 0.14em;
    color: var(--navy);
}

.page-title h1::after {
    content: "";
    display: block;
    width: 56px;
    height: 1px;
    margin-top: 24px;
    background-color: var(--gold);
}

.page-title p {
    margin: 22px 0 0;
    font-size: 16px;
    color: var(--ink-soft);
}

/* ----------------------------------------------------------
   本文用の見出し・文章
   ---------------------------------------------------------- */
.content-title {
    margin: 56px 0 20px;
    font-family: var(--serif);
    font-size: 21px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--navy);
    padding-left: 16px;
    border-left: 3px solid var(--gold);
}

.prose p {
    margin: 0 0 24px;
    font-size: 16px;
}

/* 理念などの引用風の文章 */
.philosophy {
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 40px;
    background-color: var(--white);
    border-top: 1px solid var(--navy);
    border-bottom: 1px solid var(--navy);
    text-align: center;
}

.philosophy p {
    margin: 0;
    font-family: var(--serif);
    font-size: 18px;
    line-height: 2.4;
    letter-spacing: 0.08em;
    color: var(--navy);
}

/* ----------------------------------------------------------
   フッター
   ---------------------------------------------------------- */
.site-footer {
    padding: 70px 0 40px;
    color: rgba(255, 255, 255, 0.85);
    background-color: var(--navy-deep);
    text-align: center;
}

.footer-logo {
    margin: 0 0 8px;
    font-family: var(--serif);
    font-size: 24px;
    letter-spacing: 0.18em;
    color: var(--white);
}

.footer-name {
    margin: 0 0 4px;
    font-size: 15px;
}

.footer-tag {
    margin: 0;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.55);
}

.footer-menu {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px 28px;
    margin: 36px 0;
    padding: 28px 0;
    list-style: none;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-menu a {
    font-size: 14px;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.75);
}

.footer-menu a:hover {
    color: var(--gold);
}

.copyright {
    margin: 0;
    font-size: 13px;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.45);
}

/* ----------------------------------------------------------
   ふわりと表示する動き
   ---------------------------------------------------------- */
.js .reveal {
    opacity: 0;
    transform: translateY(26px);
    transition: opacity 0.9s ease, transform 0.9s ease;
}

.js .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {

    .js .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    html {
        scroll-behavior: auto;
    }
}

/* ----------------------------------------------------------
   スマホ・タブレット対応
   ---------------------------------------------------------- */
@media screen and (max-width: 900px) {

    .nav-toggle {
        display: block;
    }

    .global-nav {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        z-index: 110;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow-y: auto;
        background-color: #141d31;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.35s ease, visibility 0.35s ease;
    }

    body.nav-open .global-nav {
        opacity: 1;
        visibility: visible;
    }

    body.nav-open {
        overflow: hidden;
    }

    .nav-list {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }

    .nav-list a {
        font-size: 18px;
        color: var(--white);
    }

    .nav-list a:hover,
    .nav-list a.is-current {
        color: var(--gold);
    }

    .nav-list .nav-contact a {
        border-color: var(--gold);
        color: var(--gold);
    }

    body.nav-open .nav-toggle span {
        background-color: var(--white);
    }

    body.nav-open .nav-toggle span:nth-child(1) {
        transform: translateY(7.5px) rotate(45deg);
    }

    body.nav-open .nav-toggle span:nth-child(2) {
        opacity: 0;
    }

    body.nav-open .nav-toggle span:nth-child(3) {
        transform: translateY(-7.5px) rotate(-45deg);
    }
}

@media screen and (max-width: 768px) {

    body {
        font-size: 16px;
    }

    .hero {
        min-height: 480px;
        background-image:
            linear-gradient(rgba(246, 243, 236, 0.96),
                rgba(246, 243, 236, 0.92)),
            url("../images/mainvisual.png");
        background-position: center center;
    }

    .hero-catch {
        text-shadow: 0 1px 8px rgba(246, 243, 236, 0.95);
    }

    .hero-lead {
        text-shadow: 0 1px 6px rgba(246, 243, 236, 0.95);
    }

    .hero-inner {
        padding: 70px 0;
    }

    .hero-catch {
        font-size: 25px;
        letter-spacing: 0.06em;
    }

    .hero-lead {
        font-size: 16px;
    }

    .section {
        padding: 64px 0;
    }

    .sec-head {
        gap: 14px;
    }

    .sec-head h2 {
        font-size: 24px;
    }

    .sec-lead {
        padding-left: 0;
        margin-bottom: 40px;
    }

    .promise-grid,
    .card-grid,
    .flow-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .flow-grid {
        gap: 36px;
    }

    .company-table th,
    .company-table td {
        display: block;
        width: 100%;
        padding: 14px 8px;
    }

    .company-table th {
        border-bottom: none;
        padding-bottom: 0;
    }

    .company-table tr:first-child td {
        border-top: none;
    }

    .news-list li {
        flex-direction: column;
        gap: 2px;
    }

    .cta {
        padding: 80px 0;
    }

    .cta h2 {
        font-size: 24px;
    }

    .page-title {
        padding: 60px 0 48px;
    }

    .page-title h1 {
        font-size: 28px;
    }

    .philosophy {
        padding: 36px 24px;
    }

    .philosophy p {
        font-size: 16.5px;
        text-align: left;
    }

    .btn {
        min-width: 0;
        width: 100%;
        max-width: 320px;
    }
}