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

:root {
    --bg: #fafafa;
    --fg: #1a1a1a;
    --fg-light: #555;
    --fg-muted: #999;
    --line: #e8e8e8;
    --accent: #c8a96e;
    --accent-dark: #b08d50;
    --white: #fff;
    --transition: all .4s cubic-bezier(.25, .46, .45, .94);
    --main-color: #4FB0B7;
    --sub-color: #EB5C4E;
}

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

body {
    font-family: 'Hiragino Sans GB', 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background: var(--bg);
    color: var(--fg);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

section {
    position: relative
}

.layui-layer{
    border-radius: 10px !important;
}

/* ========== Scroll Reveal ========== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(.25, .46, .45, .94), transform 1s cubic-bezier(.25, .46, .45, .94)
}

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

/* ========== Navigation ========== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 3rem;
    transition: var(--transition);
    /* background: transparent; */
    background: #22282c;
}

.nav.scrolled {
    background: rgba(250, 250, 250, .92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1rem 3rem;
    border-bottom: 1px solid var(--line);
}

.nav-logo {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: .15em;
    color: #FFF;
    transition: var(--transition);
}

.nav.scrolled .nav-logo {
    color: var(--fg)
}

.nav-logo span {
    color: var(--accent)
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    align-items: center
}

.nav-menu a {
    font-size: .875rem;
    letter-spacing: .08em;
    color: #fff;
    text-shadow: 0 0 1px #333;
    position: relative;
    padding: .3rem 0;
    transition: var(--transition);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--main-color);
    transition: width .3s ease;
}

.nav-menu a:hover::after {
    width: 100%
}

.nav-menu a:hover {
    color: var(--main-color)
}

.nav-lang {
    display: flex;
    gap: .6rem;
    align-items: center;
    font-size: .75rem;
    color: var(--fg-muted);
    border-left: 1px solid var(--line);
    padding-left: 1.5rem;
    margin-left: 1rem;
}

.nav-lang a {
    cursor: pointer;
    transition: var(--transition)
}

.nav-lang a.active {
    color: var(--main-color);
    font-weight: 600
}

.nav-lang a:hover {
    color: var(--main-color)
}

.nav-burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: .5rem
}

.nav-burger span {
    width: 24px;
    height: 2px;
    background: var(--fg);
    transition: var(--transition)
}

.nav-burger.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px)
}

.nav-burger.open span:nth-child(2) {
    opacity: 0
}

.nav-burger.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px)
}

/* ========== Hero ========== */
.hero {
    height: 100vh;
    min-height: 640px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2520 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url('https://images.unsplash.com/photo-1497366216548-37526070297c?w=1920&q=80') center/cover no-repeat;
    opacity: .45;
    transform: scale(1.05);
    animation: heroZoom 20s ease-in-out infinite alternate;
}

@keyframes heroZoom {
    from {
        transform: scale(1.05)
    }

    to {
        transform: scale(1.15)
    }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, .3) 0%, rgba(0, 0, 0, .15) 50%, rgba(0, 0, 0, .5) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    padding: 0 2rem;
    /* max-width: 1200px; */
}

.hero-tagline {
    font-size: .8rem;
    letter-spacing: .4em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease .3s forwards;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5.5rem);
    font-weight: 800;
    letter-spacing: .05em;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeInUp 1s ease .5s forwards;
}

.hero-title-en {
    display: block;
    font-size: .6em;
    font-weight: 400;
    letter-spacing: .1em;
    /* color: var(--accent); */
    color: var(--main-color);
    margin-top: 1rem;
    white-space: nowrap;
}

.hero-slogan {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 300;
    letter-spacing: .1em;
    color: rgba(255, 255, 255, .8);
    max-width: 600px;
    margin: 0 auto 3rem;
    opacity: 0;
    animation: fadeInUp 1s ease .7s forwards;
}

.hero-cta {
    display: inline-block;
    padding: 1rem 3rem;
    border: 1px solid rgba(255, 255, 255, .4);
    color: var(--white);
    font-size: .875rem;
    letter-spacing: .15em;
    transition: var(--transition);
    opacity: 0;
    animation: fadeInUp 1s ease .9s forwards;
}

.hero-cta:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: translateY(-3px);
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: rgba(255, 255, 255, .5);
    font-size: .75rem;
    letter-spacing: .2em;
    text-align: center;
    animation: bounce 2s infinite;
}

.hero-scroll::after {
    content: '';
    display: block;
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, .3);
    margin: .8rem auto 0;
}

@keyframes bounce {

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

    50% {
        transform: translateX(-50%) translateY(10px)
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px)
    }

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

/* ========== Section Common ========== */
.section {
    padding: 8rem 3rem;
    max-width: 1400px;
    margin: 0 auto
}

.section-label {
    font-size: .75rem;
    letter-spacing: .4em;
    text-transform: uppercase;
    color: var(--main-color);
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    letter-spacing: .05em;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--fg-light);
    max-width: 600px;
    margin-bottom: 4rem;
}

/* ========== About ========== */
.about {
    background: var(--white)
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.about-text {
    padding-right: 2rem
}

.about-item {
    margin-bottom: 3rem
}

.about-item:last-child {
    margin-bottom: 0
}

.about-item-title {
    font-size: .75rem;
    letter-spacing: .3em;
    text-transform: uppercase;
    color: var(--main-color);
    margin-bottom: .8rem;
}

.about-item h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: .8rem;
}

.about-item p {
    color: var(--fg-light);
    font-size: .95rem;
    line-height: 1.9;
}

.about-image {
    position: relative;
    height: 600px;
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1.5s cubic-bezier(.25, .46, .45, .94);
}

.about-image:hover img {
    transform: scale(1.08)
}

.about-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 60%, rgba(200, 169, 110, .1));
    pointer-events: none;
}

/* ========== Services ========== */
.services {
    background: var(--bg)
}

.services-header {
    text-align: center;
    margin-bottom: 5rem
}

.services-header .section-subtitle {
    margin: 1rem auto 0
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.service-card {
    background: var(--white);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--line);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, .08);
    border-color: var(--accent);
}

.service-card-img {
    height: 240px;
    overflow: hidden;
    position: relative;
}

.service-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1s ease;
}

.service-card:hover .service-card-img img {
    transform: scale(1.1)
}

.service-card-num {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(255, 255, 255, .9);
    color: var(--fg);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .875rem;
    font-weight: 600;
    border-radius: 50%;
}

.service-card-body {
    padding: 2rem 1.5rem
}

.service-card-body h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: .8rem;
}

.service-card-body p {
    font-size: .875rem;
    color: var(--fg-light);
    line-height: 1.8;
}

.service-card-body .accent-line {
    width: 30px;
    height: 2px;
    background: var(--main-color);
    margin-bottom: 1rem;
}

/* ========== Client Logos ========== */
.clients {
    padding: 5rem 3rem;
    background: var(--white);
    text-align: center
}

.clients-title {
    font-size: .75rem;
    letter-spacing: .3em;
    text-transform: uppercase;
    color: var(--fg-muted);
    margin-bottom: 3rem;
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
}

.client-logo {
    /* height: 60px; */
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: .5;
    transition: var(--transition);
    /* filter: grayscale(100%); */
}

.client-logo:hover {
    opacity: 1;
    filter: grayscale(0)
}

.client-logo span {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: .1em;
    color: var(--fg-light);
}

/* ========== Cases ========== */
.cases {
    background: var(--bg)
}

.cases-header {
    text-align: center;
    margin-bottom: 5rem
}

.case-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 6rem;
}

.case-item:last-child {
    margin-bottom: 0
}

.case-item:nth-child(even) .case-image {
    order: 2
}

.case-item:nth-child(even) .case-text {
    order: 1
}

.case-image {
    height: 400px;
    overflow: hidden;
    position: relative
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1.2s ease;
}

.case-item:hover .case-image img {
    transform: scale(1.06)
}

.case-num {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    font-size: 3rem;
    font-weight: 800;
    color: rgba(255, 255, 255, .5);
    line-height: 1;
}

.case-text {
    padding: 0 1rem
}

.case-label {
    font-size: .75rem;
    letter-spacing: .3em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1rem;
}

.case-text h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
}

.case-text p {
    color: var(--fg-light);
    font-size: .95rem;
    line-height: 1.9;
    margin-bottom: 1.5rem;
}

.case-tag {
    display: inline-block;
    padding: .3rem 1rem;
    background: rgba(200, 169, 110, .1);
    color: var(--accent);
    font-size: .75rem;
    letter-spacing: .1em;
    border-radius: 2px;
}

/* ========== Contact ========== */
.contact {
    background: var(--white)
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
}

.contact-info h2 {
    margin-bottom: 2rem
}

.contact-info p {
    color: var(--fg-light);
    margin-bottom: 2rem;
    font-size: .95rem
}

.contact-detail {
    margin-bottom: 1.5rem
}

.contact-detail-label {
    font-size: .75rem;
    letter-spacing: .2em;
    color: var(--fg-muted);
    text-transform: uppercase;
    margin-bottom: .3rem;
}

.contact-detail-value {
    font-size: 1rem;
    color: var(--fg)
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem
}

.form-group {
    display: flex;
    flex-direction: column
}

.form-group label {
    font-size: .75rem;
    letter-spacing: .1em;
    color: var(--fg-muted);
    margin-bottom: .5rem;
    text-transform: uppercase;
}

.form-group select,
.form-group input,
.form-group textarea {
    padding: .8rem 1rem;
    border: 1px solid var(--line);
    background: var(--bg);
    font-size: .9rem;
    color: var(--fg);
    transition: var(--transition);
    font-family: inherit;
}

.form-group select:focus,
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--white);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px
}

.form-submit {
    padding: 1rem 2rem;
    background: var(--fg);
    color: var(--white);
    border: none;
    font-size: .875rem;
    letter-spacing: .15em;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
}

.form-submit:hover {
    background: var(--accent);
    transform: translateY(-2px)
}

/* ========== Footer ========== */
.footer {
    background: #1a1a1a;
    color: rgba(255, 255, 255, .6);
    padding: 4rem 3rem 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    max-width: 1400px;
    margin: 0 auto 3rem;
}

.footer-brand h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: .15em;
    margin-bottom: 1rem;
}

.footer-brand h3 span {
    color: var(--main-color)
}

.footer-brand p {
    font-size: .85rem;
    max-width: 300px
}

.footer-col h4 {
    font-size: .75rem;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, .4);
    margin-bottom: 1rem;
}

.footer-col a {
    display: block;
    font-size: .875rem;
    color: rgba(255, 255, 255, .6);
    margin-bottom: .6rem;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--accent)
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .1);
    padding-top: 2rem;
    text-align: center;
    max-width: 1400px;
    margin: 0 auto;
}

.footer-bottom p {
    font-size: .8rem;
    color: rgba(255, 255, 255, .4)
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr)
    }

    .clients-grid {
        grid-template-columns: repeat(4, 1fr)
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr
    }
}

@media (max-width: 768px) {
    .nav {
        padding: 1rem 1.5rem
    }

    .nav.scrolled {
        padding: .8rem 1.5rem
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: right .4s ease;
        box-shadow: -5px 0 30px rgba(0, 0, 0, .1);
    }

    .nav-menu.open {
        right: 0
    }

    .nav-lang {
        border-left: none;
        padding-left: 0;
        margin-left: 0;
        flex-direction: column;
        gap: .5rem
    }

    .nav-burger {
        display: flex;
        z-index: 1001
    }

    .section {
        padding: 5rem 1.5rem
    }

    .about-grid,
    .case-item,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem
    }

    .about-image {
        height: 400px
    }

    .about-text {
        padding-right: 0
    }

    .case-item:nth-child(even) .case-image {
        order: 0
    }

    .case-item:nth-child(even) .case-text {
        order: 0
    }

    .services-grid {
        grid-template-columns: 1fr
    }

    .clients-grid {
        grid-template-columns: repeat(3, 1fr)
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem
    }

    .footer {
        padding: 3rem 1.5rem 2rem
    }
}

.more-link{
    color: var(--main-color);
    font-size: .75rem;
    letter-spacing: .2em;
    text-transform: uppercase;
    margin-top: 1rem;
    cursor: pointer;
    text-decoration: underline;
}

.more-box{
    display: none;
    padding: 10px;
    h4{
        color: var(--main-color);
        margin-top: 10px;
    }
}