/* =====================================================
   ROOT
===================================================== */

:root {

    --black: #111111;
    --dark: #171717;
    --dark-2: #202020;

    --white: #ffffff;

    --off-white: #f7f7f5;
    --gray-50: #f2f2f0;
    --gray-100: #e9e9e6;
    --gray-300: #c9c9c5;
    --gray-500: #777772;
    --gray-700: #444440;

    --yellow: #d8b600;

    --max-width: 1320px;

    --header-height: 88px;

    --ease: cubic-bezier(.22,.61,.36,1);
}


/* =====================================================
   RESET
===================================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {

    margin: 0;
    padding: 0;

    background: var(--white);

    color: var(--black);

    font-family:
        "Noto Sans JP",
        "Inter",
        sans-serif;

    line-height: 1.8;

    overflow-x: hidden;
}

body.menu-open {
    overflow: hidden;
}

img {
    display: block;

    width: 100%;
}

a {
    color: inherit;

    text-decoration: none;
}

button {
    font: inherit;
}

::selection {
    background: var(--black);
    color: var(--white);
}


/* =====================================================
   COMMON
===================================================== */

.container {

    width:
        min(
            calc(100% - 80px),
            var(--max-width)
        );

    margin-inline: auto;
}

.section {

    position: relative;

    padding: 150px 0;
}

.section-heading {

    display: grid;

    grid-template-columns:
        100px
        1fr;

    gap: 30px;

    margin-bottom: 90px;
}

.section-number {

    padding-top: 7px;

    color: var(--yellow);

    font-family: "Inter", sans-serif;

    font-size: 14px;

    font-weight: 600;

    letter-spacing: .1em;
}

.section-label {

    display: block;

    margin-bottom: 18px;

    color: var(--gray-500);

    font-family: "Inter", sans-serif;

    font-size: 11px;

    font-weight: 700;

    letter-spacing: .22em;
}

.section-heading h2 {

    margin: 0;

    font-size:
        clamp(
            36px,
            4vw,
            64px
        );

    line-height: 1.25;

    letter-spacing: -.04em;

    font-weight: 700;
}


/* =====================================================
   LOADER
===================================================== */

.page-loader {

    position: fixed;

    inset: 0;

    z-index: 9999;

    display: flex;

    align-items: center;
    justify-content: center;

    background: var(--black);

    transition:
        opacity .8s var(--ease),
        visibility .8s;
}

.page-loader.loaded {

    opacity: 0;

    visibility: hidden;
}

.loader-inner {
    width: 220px;
}

.loader-line {

    display: block;

    width: 100%;
    height: 1px;

    background:
        rgba(255,255,255,.2);

    position: relative;

    overflow: hidden;
}

.loader-line::after {

    content: "";

    position: absolute;

    top: 0;
    left: 0;

    width: 35%;
    height: 100%;

    background: var(--yellow);

    animation:
        loader 1.2s ease infinite;
}

.loader-text {

    display: block;

    margin-top: 15px;

    color:
        rgba(255,255,255,.6);

    font-family: "Inter", sans-serif;

    font-size: 9px;

    letter-spacing: .2em;
}

@keyframes loader {

    0% {
        transform: translateX(-100%);
    }

    100% {
        transform: translateX(400%);
    }

}


/* =====================================================
   HEADER
===================================================== */

.site-header {

    position: fixed;

    top: 0;
    left: 0;

    width: 100%;

    height: var(--header-height);

    z-index: 1000;

    color: var(--white);

    transition:
        background .35s ease,
        color .35s ease,
        box-shadow .35s ease;
}

.site-header.scrolled {

    color: var(--black);

    background:
        rgba(255,255,255,.94);

    backdrop-filter:
        blur(18px);

    box-shadow:
        0 1px 0 rgba(0,0,0,.08);
}

.header-inner {

    width:
        min(
            calc(100% - 80px),
            1440px
        );

    height: 100%;

    margin-inline: auto;

    display: flex;

    align-items: center;

    justify-content: space-between;
}

.header-logo {
    width: 115px;
}

.header-logo img {
  width: 100%;

  max-height: 45px;

  object-fit: contain;

  object-position: left center;
}

.desktop-nav {

    display: flex;

    align-items: center;

    gap: 34px;

    height: 100%;

    font-family: "Inter", sans-serif;

    font-size: 11px;

    font-weight: 600;

    letter-spacing: .12em;
}

.desktop-nav > a,
.nav-parent {

    position: relative;

    display: flex;

    align-items: center;

    height: 100%;
}

.desktop-nav > a::after,
.nav-parent::after {

    content: "";

    position: absolute;

    left: 0;
    bottom: 25px;

    width: 0;
    height: 1px;

    background: currentColor;

    transition:
        width .3s var(--ease);
}

.desktop-nav > a:hover::after,
.nav-parent:hover::after,
.desktop-nav > a.active::after {

    width: 100%;
}

.nav-dropdown {

    position: relative;

    height: 100%;
}

.nav-parent span {
    margin-left: 7px;
}

.dropdown-menu {

    position: absolute;

    top: 75px;
    left: -20px;

    width: 180px;

    padding: 12px;

    background:
        rgba(255,255,255,.98);

    color: var(--black);

    box-shadow:
        0 20px 50px
        rgba(0,0,0,.12);

    opacity: 0;

    visibility: hidden;

    transform:
        translateY(10px);

    transition:
        opacity .25s ease,
        visibility .25s ease,
        transform .25s ease;
}

.nav-dropdown:hover .dropdown-menu {

    opacity: 1;

    visibility: visible;

    transform:
        translateY(0);
}

.dropdown-menu a {

    display: block;

    padding: 13px 12px;

    font-size: 10px;

    letter-spacing: .08em;

    transition:
        background .2s ease,
        padding-left .2s ease;
}

.dropdown-menu a:hover,
.dropdown-menu a.active {

    background:
        var(--gray-50);

    padding-left: 18px;
}


/* =====================================================
   MOBILE BUTTON
===================================================== */

.menu-toggle {

    display: none;

    width: 42px;
    height: 42px;

    padding: 0;

    border: 0;

    background: transparent;

    cursor: pointer;

    flex-direction: column;

    justify-content: center;

    gap: 6px;
}

.menu-toggle span {

    display: block;

    width: 26px;
    height: 1px;

    margin-left: auto;

    background: currentColor;

    transition:
        transform .3s ease,
        opacity .3s ease;
}

.menu-toggle.active span:nth-child(1) {

    transform:
        translateY(7px)
        rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {

    transform:
        translateY(-7px)
        rotate(-45deg);
}


/* =====================================================
   MOBILE MENU
===================================================== */

.mobile-menu {

    position: fixed;

    inset: 0;

    z-index: 900;

    background: var(--black);

    color: var(--white);

    visibility: hidden;

    opacity: 0;

    transition:
        opacity .4s ease,
        visibility .4s ease;
}

.mobile-menu.active {

    visibility: visible;

    opacity: 1;
}

.mobile-menu-inner {

    height: 100%;

    padding:
        calc(var(--header-height) + 50px)
        40px
        40px;

    display: flex;

    flex-direction: column;
}

.mobile-menu-label {

    margin-bottom: 45px;

    color: var(--gray-500);

    font-family: "Inter", sans-serif;

    font-size: 10px;

    letter-spacing: .2em;
}

.mobile-menu nav {

    display: flex;

    flex-direction: column;

    gap: 8px;
}

.mobile-menu nav > a {

    display: flex;

    align-items: baseline;

    gap: 20px;

    padding: 8px 0;

    font-family: "Inter", sans-serif;

    font-size:
        clamp(
            28px,
            8vw,
            48px
        );

    font-weight: 600;

    letter-spacing: -.04em;
}

.mobile-menu nav > a span,
.mobile-submenu span {

    color: var(--yellow);

    font-size: 9px;

    letter-spacing: .08em;
}

.mobile-submenu {

    margin:
        -2px
        0
        18px
        48px;

    display: flex;

    flex-direction: column;

    gap: 3px;
}

.mobile-submenu a {

    display: flex;

    gap: 15px;

    align-items: center;

    padding: 5px 0;

    color: var(--gray-500);

    font-size: 13px;
}

.mobile-submenu a.current {
    color: var(--white);
}

.mobile-menu-footer {

    margin-top: auto;

    padding-top: 30px;

    border-top:
        1px solid
        rgba(255,255,255,.12);

    display: flex;

    justify-content: space-between;

    color: var(--gray-500);

    font-family: "Inter", sans-serif;

    font-size: 8px;

    letter-spacing: .15em;
}


/* =====================================================
   HERO
===================================================== */

.telecom-hero {

    position: relative;

    min-height: 780px;

    height: 100vh;

    max-height: 1000px;

    overflow: hidden;

    background: var(--black);

    color: var(--white);
}

.hero-bg {

    position: absolute;

    inset: 0;

    background-image:
        url("https://www.ag-inc.net/image/7.png");

    background-size: cover;

    background-position: center;

    transform: scale(1.05);

    animation:
        heroZoom 12s ease-out forwards;
}

@keyframes heroZoom {

    from {
        transform: scale(1.08);
    }

    to {
        transform: scale(1);
    }

}

.hero-overlay {

    position: absolute;

    inset: 0;

    background:
        linear-gradient(
            90deg,
            rgba(0,0,0,.9) 0%,
            rgba(0,0,0,.72) 38%,
            rgba(0,0,0,.35) 70%,
            rgba(0,0,0,.7) 100%
        );
}


/* =====================================================
   NETWORK VISUAL
===================================================== */

.network-visual {

    position: absolute;

    top: 0;
    right: 0;

    width: 48%;
    height: 100%;

    z-index: 2;

    pointer-events: none;

    overflow: hidden;
}

.network-grid {

    position: absolute;

    inset: 0;

    opacity: .13;

    background-image:
        linear-gradient(
            90deg,
            transparent 49.5%,
            rgba(255,255,255,.25) 50%,
            transparent 50.5%
        ),
        linear-gradient(
            0deg,
            transparent 49.5%,
            rgba(255,255,255,.25) 50%,
            transparent 50.5%
        );

    background-size:
        80px 80px;
}


/*
    光のラインは右側だけ。
    Hero文字領域には侵入しない。
*/

.signal-line {

    position: absolute;

    height: 1px;

    transform-origin: left center;

    background:
        linear-gradient(
            90deg,
            transparent,
            rgba(255,255,255,.2),
            rgba(216,182,0,.95),
            rgba(255,255,255,.15),
            transparent
        );

    box-shadow:
        0 0 8px
        rgba(216,182,0,.25);
}

.signal-line-1 {

    width: 100%;

    top: 31%;
    left: 2%;

    transform:
        rotate(-22deg);

    animation:
        signal1 6s ease-in-out infinite;
}

.signal-line-2 {

    width: 120%;

    top: 52%;
    left: -15%;

    transform:
        rotate(14deg);

    animation:
        signal2 7s ease-in-out infinite;
}

.signal-line-3 {

    width: 85%;

    top: 69%;
    left: 18%;

    transform:
        rotate(-28deg);

    animation:
        signal3 5s ease-in-out infinite;
}

@keyframes signal1 {

    0%,100% {
        opacity: .15;

        transform:
            translateX(8%)
            rotate(-22deg);
    }

    50% {
        opacity: .8;

        transform:
            translateX(-4%)
            rotate(-22deg);
    }

}

@keyframes signal2 {

    0%,100% {
        opacity: .15;

        transform:
            translateX(-8%)
            rotate(14deg);
    }

    50% {
        opacity: .75;

        transform:
            translateX(5%)
            rotate(14deg);
    }

}

@keyframes signal3 {

    0%,100% {
        opacity: .15;
    }

    50% {
        opacity: .65;
    }

}


/* =====================================================
   SIGNAL NODES
===================================================== */

.signal-node {

    position: absolute;

    width: 6px;
    height: 6px;

    border-radius: 50%;

    background:
        var(--yellow);

    box-shadow:
        0 0 18px
        rgba(216,182,0,.8);

    animation:
        nodePulse 2.5s ease-in-out infinite;
}

.node-1 {

    top: 31%;
    left: 35%;
}

.node-2 {

    top: 51%;
    left: 62%;

    animation-delay:
        .6s;
}

.node-3 {

    top: 69%;
    left: 47%;

    animation-delay:
        1s;
}

.node-4 {

    top: 44%;
    left: 80%;

    animation-delay:
        1.5s;
}

@keyframes nodePulse {

    0%,100% {
        opacity: .25;
        transform: scale(.7);
    }

    50% {
        opacity: 1;
        transform: scale(1.35);
    }

}


/* =====================================================
   HERO CONTENT
===================================================== */

.hero-container {

    position: relative;

    z-index: 5;

    height: 100%;

    display: flex;

    align-items: center;
}

.hero-content {

    width: 58%;

    padding-top: 50px;
}

.hero-eyebrow {

    display: flex;

    align-items: center;

    gap: 13px;

    margin-bottom: 30px;

    color:
        rgba(255,255,255,.65);

    font-family: "Inter", sans-serif;

    font-size: 10px;

    font-weight: 600;

    letter-spacing: .2em;
}

.hero-eyebrow span {

    width: 28px;
    height: 1px;

    background:
        var(--yellow);
}

.hero-content h1 {

    margin: 0;

    font-size:
        clamp(
            52px,
            6vw,
            94px
        );

    line-height: 1.13;

    letter-spacing: -.06em;

    font-weight: 500;
}

.hero-content h1 strong {
    font-weight: 800;
}

.hero-description {

    margin:
        38px 0 0;

    color:
        rgba(255,255,255,.75);

    font-size: 16px;

    line-height: 2;
}

.hero-en {

    margin-top: 50px;

    color:
        rgba(255,255,255,.22);

    font-family: "Inter", sans-serif;

    font-size: 11px;

    line-height: 1.6;

    letter-spacing: .28em;

    font-weight: 600;
}

.hero-scroll {

    position: absolute;

    bottom: 45px;
    left: 40px;

    z-index: 5;

    display: flex;

    align-items: center;

    gap: 15px;

    color:
        rgba(255,255,255,.5);

    font-family: "Inter", sans-serif;

    font-size: 8px;

    letter-spacing: .2em;
}

.hero-scroll i {

    display: block;

    width: 45px;
    height: 1px;

    background:
        rgba(255,255,255,.3);

    position: relative;
}

.hero-scroll i::after {

    content: "";

    position: absolute;

    left: 0;
    top: 0;

    width: 15px;
    height: 1px;

    background:
        var(--yellow);

    animation:
        scrollLine 2s ease infinite;
}

@keyframes scrollLine {

    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(30px);
    }

}


/* =====================================================
   INTRO
===================================================== */

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

.intro-grid {

    display: grid;

    grid-template-columns:
        1.35fr
        .65fr;

    gap: 120px;

    align-items: start;
}

.intro-lead .large-text {

    margin:
        0 0 35px;

    font-size:
        clamp(
            24px,
            2.5vw,
            36px
        );

    line-height: 1.7;

    letter-spacing: -.03em;

    font-weight: 600;
}

.intro-lead > p:not(.large-text) {

    max-width: 680px;

    margin: 0;

    color: var(--gray-500);

    font-size: 14px;
}


/* =====================================================
   NETWORK BOX
===================================================== */

.network-box {

    position: relative;

    min-height: 320px;

    padding: 35px;

    background:
        var(--gray-50);

    border:
        1px solid var(--gray-100);

    overflow: hidden;
}

.network-box-top {

    display: flex;

    justify-content: space-between;

    align-items: center;
}

.network-box-top span {

    color:
        var(--gray-500);

    font-family: "Inter", sans-serif;

    font-size: 8px;

    letter-spacing: .18em;
}

.network-box-top i {

    width: 7px;
    height: 7px;

    border-radius: 50%;

    background:
        var(--yellow);

    box-shadow:
        0 0 10px
        rgba(216,182,0,.7);

    animation:
        nodePulse 2s infinite;
}

.network-box-title {

    margin-top: 30px;

    font-family: "Inter", sans-serif;

    font-size: 26px;

    font-weight: 700;

    letter-spacing: .05em;
}

.network-diagram {

    position: relative;

    height: 130px;

    margin-top: 25px;
}

.diagram-line {

    position: absolute;

    height: 1px;

    background:
        var(--gray-300);

    transform-origin: left center;
}

.line-a {

    width: 80%;

    top: 50%;
    left: 10%;

    transform:
        rotate(-22deg);
}

.line-b {

    width: 75%;

    top: 50%;
    left: 20%;

    transform:
        rotate(20deg);
}

.line-c {

    width: 55%;

    top: 50%;
    left: 30%;

    transform:
        rotate(-42deg);
}

.diagram-node {

    position: absolute;

    width: 8px;
    height: 8px;

    border-radius: 50%;

    background:
        var(--black);
}

.d1 {

    top: 47%;
    left: 10%;
}

.d2 {

    top: 27%;
    left: 38%;
}

.d3 {

    top: 70%;
    left: 63%;
}

.d4 {

    top: 37%;
    right: 8%;
}

.network-box small {

    display: block;

    color:
        var(--gray-500);

    font-family: "Inter", sans-serif;

    font-size: 7px;

    letter-spacing: .17em;
}


/* =====================================================
   SERVICE
===================================================== */

.service-area {

    background:
        var(--off-white);

    overflow: hidden;
}

.circuit-bg {

    position: absolute;

    inset: 0;

    opacity: .45;

    background-image:
        linear-gradient(
            90deg,
            transparent 49.9%,
            rgba(0,0,0,.04) 50%,
            transparent 50.1%
        ),
        linear-gradient(
            0deg,
            transparent 49.9%,
            rgba(0,0,0,.04) 50%,
            transparent 50.1%
        );

    background-size:
        80px 80px;
}

.service-grid {

    position: relative;

    display: grid;

    grid-template-columns:
        repeat(2, 1fr);

    gap: 1px;

    background:
        var(--gray-300);

    border:
        1px solid var(--gray-300);
}

.service-card {

    position: relative;

    min-height: 390px;

    padding: 42px;

    background:
        var(--white);

    overflow: hidden;

    transition:
        transform .5s var(--ease),
        background .4s ease,
        color .4s ease;
}

.service-card:hover {

    z-index: 2;

    background:
        var(--black);

    color:
        var(--white);

    transform:
        translateY(-6px);
}

.service-number {

    position: absolute;

    top: 30px;
    right: 35px;

    color:
        var(--gray-300);

    font-family: "Inter", sans-serif;

    font-size: 10px;

    letter-spacing: .15em;
}

.service-card:hover .service-number {
    color:
        rgba(255,255,255,.2);
}

.service-icon {

    width: 65px;
    height: 65px;

    margin-bottom: 55px;

    color:
        var(--black);

    transition:
        color .4s ease,
        transform .5s var(--ease);
}

.service-card:hover .service-icon {

    color:
        var(--yellow);

    transform:
        scale(1.08);
}

.service-content span {

    display: block;

    margin-bottom: 12px;

    color:
        var(--gray-500);

    font-family: "Inter", sans-serif;

    font-size: 9px;

    letter-spacing: .17em;
}

.service-card:hover
.service-content span {

    color:
        rgba(255,255,255,.5);
}

.service-content h3 {

    margin:
        0 0 18px;

    font-size: 26px;

    line-height: 1.35;

    letter-spacing: -.03em;
}

.service-content p {

    max-width: 480px;

    margin: 0;

    color:
        var(--gray-500);

    font-size: 13px;
}

.service-card:hover
.service-content p {

    color:
        rgba(255,255,255,.62);
}

.service-arrow {

    position: absolute;

    right: 38px;
    bottom: 35px;

    color:
        var(--gray-500);

    font-family: "Inter", sans-serif;

    font-size: 20px;

    transition:
        transform .35s ease,
        color .35s ease;
}

.service-card:hover .service-arrow {

    color:
        var(--yellow);

    transform:
        translateX(8px);
}


/* =====================================================
   DETAILS
===================================================== */

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

.details-list {

    display: flex;

    flex-direction: column;

    gap: 150px;
}

.detail-item {

    display: grid;

    grid-template-columns:
        1.1fr
        .9fr;

    gap: 100px;

    align-items: center;
}

.detail-item.reverse {

    grid-template-columns:
        .9fr
        1.1fr;
}

.detail-item.reverse
.detail-image {
    order: 2;
}

.detail-item.reverse
.detail-content {
    order: 1;
}

.detail-image {

    position: relative;

    height: 550px;

    overflow: hidden;

    background:
        var(--gray-100);
}

.detail-image::after {

    content: "";

    position: absolute;

    inset: 0;

    background:
        linear-gradient(
            135deg,
            transparent 60%,
            rgba(0,0,0,.15)
        );
}

.detail-image img {

    width: 100%;
    height: 100%;

    object-fit: cover;

    transition:
        transform 1s var(--ease);
}

.detail-item:hover
.detail-image img {

    transform:
        scale(1.05);
}

.detail-content span {

    display: block;

    margin-bottom: 20px;

    color:
        var(--yellow);

    font-family: "Inter", sans-serif;

    font-size: 10px;

    font-weight: 600;

    letter-spacing: .16em;
}

.detail-content h3 {

    margin:
        0 0 28px;

    font-size:
        clamp(
            32px,
            3.5vw,
            50px
        );

    line-height: 1.3;

    letter-spacing: -.04em;
}

.detail-content p {

    max-width: 520px;

    margin: 0;

    color:
        var(--gray-500);

    font-size: 14px;

    line-height: 2.1;
}


/* =====================================================
   DETAIL TAGS
===================================================== */

.detail-tags {

    display: flex;

    flex-wrap: wrap;

    gap: 8px;

    margin-top: 30px;
}

.detail-tags span {

    display: inline-block;

    margin: 0;

    padding:
        6px
        11px;

    border:
        1px solid var(--gray-300);

    color:
        var(--gray-500);

    font-family: "Inter", sans-serif;

    font-size: 7px;

    letter-spacing: .12em;
}

.detail-line {

    width: 80px;
    height: 1px;

    margin-top: 40px;

    background:
        var(--black);
}


/* =====================================================
   AREA
===================================================== */

.area-section {

    background:
        var(--black);

    color:
        var(--white);

    overflow: hidden;
}

.area-layout {

    display: grid;

    grid-template-columns:
        .8fr
        1.2fr;

    gap: 100px;

    align-items: center;
}

.area-heading .section-label {
    color: var(--yellow);
}

.area-heading h2 {

    margin: 0 0 30px;

    font-size:
        clamp(
            44px,
            5vw,
            72px
        );

    line-height: 1.2;

    letter-spacing: -.05em;
}

.area-heading p {

    max-width: 430px;

    margin: 0;

    color:
        rgba(255,255,255,.5);

    font-size: 14px;
}


/* =====================================================
   AREA VISUAL
===================================================== */

.area-visual {

    position: relative;

    height: 550px;

    overflow: hidden;

    background:
        radial-gradient(
            circle at center,
            rgba(216,182,0,.06),
            transparent 55%
        );
}

.area-visual::before {

    content: "";

    position: absolute;

    inset: 0;

    opacity: .15;

    background-image:
        linear-gradient(
            90deg,
            transparent 49.5%,
            rgba(255,255,255,.3) 50%,
            transparent 50.5%
        ),
        linear-gradient(
            0deg,
            transparent 49.5%,
            rgba(255,255,255,.3) 50%,
            transparent 50.5%
        );

    background-size:
        70px 70px;
}

.area-circle {

    position: absolute;

    top: 50%;
    left: 50%;

    border:
        1px solid
        rgba(255,255,255,.12);

    border-radius: 50%;

    transform:
        translate(-50%, -50%);

    animation:
        areaPulse 5s ease-in-out infinite;
}

.circle-1 {

    width: 170px;
    height: 170px;
}

.circle-2 {

    width: 310px;
    height: 310px;

    animation-delay:
        .7s;
}

.circle-3 {

    width: 460px;
    height: 460px;

    animation-delay:
        1.4s;
}

@keyframes areaPulse {

    0%,100% {
        opacity: .35;
    }

    50% {
        opacity: .8;
    }

}

.area-center {

    position: absolute;

    top: 50%;
    left: 50%;

    width: 100px;
    height: 100px;

    transform:
        translate(-50%, -50%);

    border:
        1px solid
        rgba(216,182,0,.8);

    border-radius: 50%;

    display: flex;

    flex-direction: column;

    align-items: center;
    justify-content: center;

    background:
        rgba(17,17,17,.85);

    box-shadow:
        0 0 40px
        rgba(216,182,0,.08);
}

.area-center span {

    color:
        var(--yellow);

    font-family:
        "Inter", sans-serif;

    font-size: 25px;

    font-weight: 700;
}

.area-center small {

    margin-top: 3px;

    color:
        rgba(255,255,255,.45);

    font-family:
        "Inter", sans-serif;

    font-size: 6px;

    letter-spacing: .18em;
}

.area-point {

    position: absolute;

    display: flex;

    align-items: center;

    gap: 8px;

    color:
        rgba(255,255,255,.55);

    font-family:
        "Inter", sans-serif;

    font-size: 8px;

    letter-spacing: .14em;
}

.area-point span {

    width: 5px;
    height: 5px;

    border-radius: 50%;

    background:
        var(--yellow);

    box-shadow:
        0 0 10px
        rgba(216,182,0,.8);
}

.point-tokyo {

    top: 20%;
    right: 15%;
}

.point-kanagawa {

    bottom: 24%;
    left: 18%;
}

.point-saitama {

    top: 31%;
    left: 13%;
}

.point-chiba {

    bottom: 18%;
    right: 14%;
}


/* =====================================================
   STRENGTH
===================================================== */

.strength-section {

    background:
        var(--off-white);

    overflow: hidden;
}

.strength-bg {

    position: absolute;

    inset: 0;

    opacity: .45;

    background-image:
        linear-gradient(
            90deg,
            transparent 49.8%,
            rgba(0,0,0,.05) 50%,
            transparent 50.2%
        );

    background-size:
        100px 100%;
}

.strength-grid {

    position: relative;

    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    gap: 1px;

    background:
        var(--gray-300);
}

.strength-card {

    position: relative;

    min-height: 450px;

    padding: 45px;

    background:
        var(--white);

    transition:
        transform .45s var(--ease);
}

.strength-card:hover {

    transform:
        translateY(-6px);

    z-index: 2;
}

.strength-number {

    display: block;

    color:
        var(--yellow);

    font-family:
        "Inter", sans-serif;

    font-size: 10px;

    letter-spacing: .15em;
}

.strength-icon {

    width: 80px;
    height: 80px;

    margin:
        50px 0 40px;

    color:
        var(--black);
}

.strength-icon svg {

    width: 100%;
    height: 100%;
}

.strength-card h3 {

    margin:
        0 0 25px;

    font-size: 28px;

    line-height: 1.4;

    letter-spacing: -.04em;
}

.strength-card p {

    margin: 0;

    color:
        var(--gray-500);

    font-size: 13px;

    line-height: 2;
}


/* =====================================================
   MESSAGE
===================================================== */

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

.message-grid {

    display: grid;

    grid-template-columns:
        .4fr
        1.6fr;

    gap: 100px;
}

.message-label {

    padding-top: 8px;

    color:
        var(--yellow);

    font-family:
        "Inter", sans-serif;

    font-size: 11px;

    font-weight: 700;

    letter-spacing: .2em;
}

.message-content {
    max-width: 850px;
}

.message-content h2 {

    margin:
        0 0 45px;

    font-size:
        clamp(
            38px,
            5vw,
            70px
        );

    line-height: 1.25;

    letter-spacing: -.055em;
}

.message-content p {

    max-width: 680px;

    margin:
        0 0 25px;

    color:
        var(--gray-500);

    font-size: 14px;

    line-height: 2.2;
}

.message-sign {

    display: flex;

    flex-direction: column;

    margin-top: 60px;

    padding-top: 25px;

    border-top:
        1px solid
        var(--gray-300);
}

.message-sign strong {

    font-family:
        "Inter", sans-serif;

    font-size: 20px;

    letter-spacing: .08em;
}

.message-sign span {

    margin-top: 4px;

    color:
        var(--gray-500);

    font-family:
        "Inter", sans-serif;

    font-size: 8px;

    letter-spacing: .2em;
}


/* =====================================================
   CTA
===================================================== */

.telecom-cta {

    background:
        var(--dark);

    color:
        var(--white);

    overflow: hidden;
}

.cta-network {

    position: absolute;

    inset: 0;

    opacity: .25;

    background-image:
        linear-gradient(
            90deg,
            transparent 49.8%,
            rgba(255,255,255,.08) 50%,
            transparent 50.2%
        ),
        linear-gradient(
            0deg,
            transparent 49.8%,
            rgba(255,255,255,.08) 50%,
            transparent 50.2%
        );

    background-size:
        100px 100px;
}

.cta-inner {

    position: relative;

    max-width: 900px;
}

.cta-inner .section-label {
    color: var(--yellow);
}

.cta-inner h2 {

    margin: 0;

    font-size:
        clamp(
            42px,
            5vw,
            72px
        );

    line-height: 1.25;

    letter-spacing: -.05em;
}

.cta-inner > p {

    margin:
        30px 0 50px;

    color:
        rgba(255,255,255,.5);

    font-size: 14px;
}

.cta-actions {

    display: flex;

    align-items: center;

    gap: 40px;
}

.cta-button {

    display: flex;

    align-items: center;

    justify-content: space-between;

    width: 280px;

    min-height: 65px;

    padding:
        0 25px;

    border:
        1px solid
        rgba(255,255,255,.35);

    background:
        transparent;

    color:
        var(--white);

    font-size: 13px;

    transition:
        background .3s ease,
        color .3s ease,
        border-color .3s ease;
}

.cta-button:hover {

    background:
        var(--white);

    border-color:
        var(--white);

    color:
        var(--black);
}

.cta-button strong {

    color:
        var(--yellow);

    font-family:
        "Inter", sans-serif;

    font-size: 20px;
}

.cta-tel {

    display: flex;

    flex-direction: column;

    gap: 4px;

    font-family:
        "Inter", sans-serif;

    font-size: 20px;

    letter-spacing: .05em;
}

.cta-tel small {

    color:
        var(--gray-500);

    font-size: 8px;

    letter-spacing: .2em;
}


/* =====================================================
   FOOTER
===================================================== */

.site-footer {

    background:
        var(--white);

    color:
        var(--black);

    padding:
        85px 0 30px;

    border-top:
        1px solid
        var(--gray-100);
}

.footer-main {

    display: grid;

    grid-template-columns:
        1fr
        1fr;

    gap: 100px;

    padding-bottom: 70px;

    border-bottom:
        1px solid
        var(--gray-100);
}

.footer-brand img {

    width: 120px;

    margin-bottom: 25px;
}

.footer-brand p {

    margin: 0;

    color:
        var(--gray-500);

    font-size: 12px;

    line-height: 2;
}

.footer-nav {

    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    gap: 30px;
}

.footer-nav > div {

    display: flex;

    flex-direction: column;

    align-items: flex-start;
}

.footer-nav span {

    margin-bottom: 20px;

    color:
        var(--gray-500);

    font-family:
        "Inter", sans-serif;

    font-size: 8px;

    letter-spacing: .18em;
}

.footer-nav a {

    margin-bottom: 10px;

    font-size: 11px;

    transition:
        opacity .2s ease;
}

.footer-nav a:hover {
    opacity: .5;
}

.footer-bottom {

    display: flex;

    justify-content: space-between;

    gap: 20px;

    padding-top: 25px;

    color:
        var(--gray-500);

    font-family:
        "Inter", sans-serif;

    font-size: 8px;

    letter-spacing: .04em;
}


/* =====================================================
   REVEAL
===================================================== */

.reveal {

    opacity: 0;

    transform:
        translateY(35px);

    transition:
        opacity .9s var(--ease),
        transform .9s var(--ease);
}

.reveal.visible {

    opacity: 1;

    transform:
        translateY(0);
}


/* =====================================================
   RESPONSIVE
===================================================== */

@media (max-width: 1100px) {

    :root {
        --header-height: 75px;
    }

    .desktop-nav {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .container {

        width:
            min(
                calc(100% - 50px),
                var(--max-width)
            );
    }

    .header-inner {

        width:
            calc(100% - 50px);
    }

    .hero-content {
        width: 65%;
    }

    .intro-grid {
        gap: 60px;
    }

    .detail-item,
    .detail-item.reverse {

        grid-template-columns:
            1fr;

        gap: 50px;
    }

    .detail-item.reverse
    .detail-image,
    .detail-item.reverse
    .detail-content {

        order: initial;
    }

    .detail-image {
        height: 500px;
    }

    .area-layout {

        grid-template-columns:
            1fr;

        gap: 60px;
    }

}


@media (max-width: 800px) {

    .section {
        padding: 100px 0;
    }

    .section-heading {

        grid-template-columns:
            55px 1fr;

        gap: 15px;

        margin-bottom: 60px;
    }

    .section-heading h2 {
        font-size: 38px;
    }

    .intro-grid {

        grid-template-columns:
            1fr;

        gap: 50px;
    }

    .service-grid {

        grid-template-columns:
            1fr;
    }

    .service-card {
        min-height: 340px;
    }

    .area-visual {
        height: 480px;
    }

    .strength-grid {

        grid-template-columns:
            1fr;
    }

    .message-grid {

        grid-template-columns:
            1fr;

        gap: 30px;
    }

    .footer-main {

        grid-template-columns:
            1fr;

        gap: 60px;
    }

}


@media (max-width: 600px) {

    .container {

        width:
            calc(100% - 40px);
    }

    .header-inner {

        width:
            calc(100% - 40px);
    }

    .telecom-hero {
        min-height: 720px;
    }

    .hero-content {

        width: 100%;

        padding-top: 20px;
    }

    .hero-content h1 {

        font-size:
            clamp(
                44px,
                12vw,
                65px
            );
    }

    .hero-description {
        font-size: 14px;
    }


    /*
       スマホではネットワーク演出を
       Hero下部に限定。
       文字との重なりを防止。
    */

    .network-visual {

        width: 100%;
        height: 38%;

        top: auto;
        bottom: 0;

        opacity: .65;
    }


    .detail-image {
        height: 350px;
    }

    .detail-tags {
        margin-top: 25px;
    }

    .area-visual {
        height: 400px;
    }

    .circle-1 {

        width: 130px;
        height: 130px;
    }

    .circle-2 {

        width: 240px;
        height: 240px;
    }

    .circle-3 {

        width: 350px;
        height: 350px;
    }

    .point-tokyo {
        top: 15%;
        right: 8%;
    }

    .point-kanagawa {
        bottom: 20%;
        left: 8%;
    }

    .point-saitama {
        top: 25%;
        left: 5%;
    }

    .point-chiba {
        bottom: 12%;
        right: 7%;
    }

    .strength-card {
        min-height: auto;
    }

    .cta-actions {

        flex-direction: column;

        align-items: flex-start;

        gap: 30px;
    }

    .cta-button {
        width: 100%;
    }

    .footer-nav {

        grid-template-columns:
            1fr 1fr;

        gap: 40px 20px;
    }

    .footer-bottom {

        flex-direction: column;
    }

}


/* =====================================================
   REDUCED MOTION
===================================================== */

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

    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {

        animation-duration:
            .01ms !important;

        animation-iteration-count:
            1 !important;

        transition-duration:
            .01ms !important;
    }

}