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

:root {
    --gold: #C4A24E;
    --gold-light: #D4B86A;
    --gold-dark: #A8893E;
    --bg: #0A0A0A;
    --bg-card: #141414;
    --bg-card-hover: #1A1A1A;
    --text: #E8E8E8;
    --text-dim: #888;
    --text-muted: #555;
    --border: #222;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--gold); text-decoration: none; }
a:hover { color: var(--gold-light); }

/* NAV */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 48px;
    height: 64px;
    background: rgba(10,10,10,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

nav .logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--gold);
}

nav .logo img { height: 28px; }

nav ul {
    list-style: none;
    display: flex;
    gap: 28px;
}

nav ul li a {
    color: var(--text-dim);
    font-size: 14px;
    letter-spacing: 1px;
    transition: color 0.2s;
    padding: 4px 0;
}

nav ul li a:hover,
nav ul li a.active { color: var(--gold); }

.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 24px; cursor: pointer; }

/* PAGE HERO */
.page-hero {
    position: relative;
    height: 50vh;
    min-height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    margin-top: 64px;
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.2;
}

.page-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10,10,10,0.3) 0%, rgba(10,10,10,0.9) 100%);
}

.page-hero .hero-inner,
.page-hero .hero-content {
    position: relative;
    z-index: 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.page-hero h1 {
    font-size: 42px;
    font-weight: 300;
    letter-spacing: 8px;
    color: #fff;
    margin-bottom: 12px;
}

.page-hero h1 span { color: var(--gold); font-weight: 600; }

.page-hero .subtitle {
    font-size: 14px;
    letter-spacing: 4px;
    color: var(--text-dim);
    text-transform: uppercase;
}

/* SECTIONS */
section { padding: 80px 48px; }

.section-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.section-label {
    font-size: 12px;
    letter-spacing: 4px;
    color: var(--gold);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: 32px;
    font-weight: 300;
    letter-spacing: 4px;
    margin-bottom: 12px;
}

.section-title-en {
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 48px;
}

.section-divider {
    width: 48px;
    height: 1px;
    background: var(--gold);
    margin-bottom: 40px;
}

/* FULL-WIDTH IMAGE */
.full-img {
    width: 100%;
    overflow: hidden;
}

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

.img-showcase {
    padding: 60px 48px;
}

.img-showcase .showcase-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    gap: 24px;
}

.showcase-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.showcase-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }

.showcase-grid img {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid var(--border);
}

/* IMAGE WITH CAPTION */
.img-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: border-color 0.3s;
}

.img-card:hover { border-color: var(--gold-dark); }

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

.img-card .caption {
    padding: 20px 24px;
}

.img-card .caption .brand {
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--gold);
    text-transform: uppercase;
    margin-bottom: 8px;
}

.img-card .caption h4 {
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 8px;
}

.img-card .caption p {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.7;
}

/* CASE LIST */
.case-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.case-item {
    display: flex;
    background: var(--bg-card);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: border-color 0.3s;
    text-decoration: none;
    color: inherit;
}

.case-item:hover {
    border-color: var(--gold-dark);
}

.case-item .thumb {
    width: 220px;
    min-height: 150px;
    flex-shrink: 0;
    overflow: hidden;
}

.case-item .thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.case-item .info {
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.case-item .info .brand-label {
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--gold);
    text-transform: uppercase;
    margin-bottom: 6px;
}

.case-item .info h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text);
}

.case-item .info p {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.7;
}

.case-section-title {
    font-size: 18px;
    font-weight: 500;
    color: var(--gold);
    margin: 48px 0 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    letter-spacing: 1px;
}

.case-section-title:first-child {
    margin-top: 0;
}

@media (max-width: 900px) {
    .case-item {
        flex-direction: column;
    }
    .case-item .thumb {
        width: 100%;
        height: 200px;
        min-height: auto;
    }
}

/* TEXT BLOCKS */
.text-block {
    max-width: 800px;
    margin: 0 auto;
}

.text-block p {
    font-size: 15px;
    line-height: 2;
    color: var(--text-dim);
    margin-bottom: 20px;
}

.text-block .highlight {
    font-size: 20px;
    color: var(--text);
    line-height: 1.8;
    border-left: 2px solid var(--gold);
    padding-left: 20px;
    margin: 32px 0;
}

/* STATS */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.stat-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 32px;
    text-align: center;
}

.stat-item .number {
    font-size: 36px;
    font-weight: 300;
    color: var(--gold);
    margin-bottom: 8px;
}

.stat-item .label {
    font-size: 13px;
    color: var(--text-dim);
    letter-spacing: 1px;
}

/* SERVICE CARDS */
.services-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
}

.services-layout .ring-img {
    text-align: center;
}

.services-layout .ring-img img {
    max-width: 100%;
    height: auto;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.service-item {
    padding: 24px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    transition: border-color 0.3s;
}

.service-item:hover { border-color: var(--gold-dark); }

.service-item h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    letter-spacing: 1px;
    color: var(--gold);
}

.service-item p {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.7;
}

/* CASE GALLERY */
.case-gallery {
    max-width: 1200px;
    margin: 0 auto;
}

.case-gallery .gallery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.case-gallery .gallery-grid.cols-3 {
    grid-template-columns: 1fr 1fr 1fr;
}

/* B&W DIVIDER */
.bw-divider {
    width: 100%;
    height: 300px;
    overflow: hidden;
    position: relative;
}

.bw-divider img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) brightness(0.6);
}

.bw-divider.short { height: 200px; }

/* METHOD SECTION */
.method-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
}

.method-layout .method-img {
    text-align: center;
}

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

.method-stages {
    display: flex;
    gap: 8px;
    margin-top: 24px;
    flex-wrap: wrap;
}

.method-stages span {
    padding: 8px 20px;
    border: 1px solid var(--border);
    font-size: 13px;
    letter-spacing: 1px;
    color: var(--text-dim);
}

.method-stages span.active {
    border-color: var(--gold);
    color: var(--gold);
}

/* RESOURCES */
.resource-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.resource-card {
    text-align: center;
    padding: 40px 24px;
    border: 1px solid var(--border);
    background: var(--bg-card);
}

.resource-card .res-number {
    font-size: 42px;
    font-weight: 300;
    color: var(--gold);
    margin-bottom: 8px;
}

.resource-card .res-unit {
    font-size: 14px;
    color: var(--gold-dark);
    margin-bottom: 16px;
}

.resource-card .res-label {
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.6;
}

/* CONTACT */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: 20px;
    font-weight: 400;
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.contact-info p {
    font-size: 15px;
    color: var(--text-dim);
    line-height: 2;
    margin-bottom: 32px;
}

.contact-detail {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-detail .item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-detail .item .label {
    font-size: 13px;
    color: var(--text-muted);
    width: 60px;
    letter-spacing: 1px;
}

.contact-detail .item .value {
    font-size: 15px;
    color: var(--text);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 16px;
    color: var(--text);
    font-size: 14px;
    font-family: var(--font);
    outline: none;
    transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus { border-color: var(--gold-dark); }

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

.contact-form button {
    background: var(--gold);
    color: #000;
    border: none;
    padding: 16px 40px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    cursor: pointer;
    font-family: var(--font);
    transition: background 0.2s;
    align-self: flex-start;
}

.contact-form button:hover { background: var(--gold-light); }

/* FOOTER */
footer {
    padding: 40px 48px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer .footer-logo {
    font-size: 14px;
    letter-spacing: 2px;
    color: var(--text-muted);
}

footer .footer-logo span { color: var(--gold); }

footer p { font-size: 12px; color: var(--text-muted); }

/* BRAND STRIP */
.brand-strip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    padding: 40px 0;
    margin-top: 48px;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}

.brand-strip .brand-name {
    font-size: 13px;
    letter-spacing: 2px;
    color: var(--text-muted);
}

/* CULTURE SECTION */
.culture-bg {
    position: relative;
    overflow: hidden;
}

.culture-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.15;
    filter: grayscale(100%);
}

.culture-bg .section-inner {
    position: relative;
    z-index: 1;
}

/* TWO-COL */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 1200px;
    margin: 0 auto;
}

.two-col h3 {
    font-size: 22px;
    font-weight: 400;
    color: var(--gold);
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.two-col p {
    font-size: 15px;
    line-height: 2;
    color: var(--text-dim);
}

/* CASE TAB LINKS */
.case-nav {
    display: flex;
    gap: 0;
    max-width: 1200px;
    margin: 0 auto 48px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.case-nav a {
    padding: 16px 28px;
    font-size: 14px;
    letter-spacing: 1px;
    color: var(--text-dim);
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.case-nav a:hover { color: var(--text); }
.case-nav a.active {
    color: var(--gold);
    border-bottom-color: var(--gold);
}

/* FEATURE STRIP */
.feature-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
    max-width: 1200px;
    margin: 0 auto;
    background: var(--border);
}

.feature-strip .feature {
    background: var(--bg);
    padding: 48px 32px;
    text-align: center;
    transition: background 0.3s;
}

.feature-strip .feature:hover { background: var(--bg-card); }

.feature-strip .feature .f-icon {
    font-size: 28px;
    margin-bottom: 16px;
    color: var(--gold);
}

.feature-strip .feature h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.feature-strip .feature p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.8;
}

/* RESPONSIVE */
@media (max-width: 900px) {
    nav { padding: 0 24px; }
    nav ul { display: none; }
    nav ul.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(10,10,10,0.98);
        padding: 24px;
        border-bottom: 1px solid var(--border);
    }
    .nav-toggle { display: block; }

    section { padding: 60px 24px; }
    .page-hero h1 { font-size: 28px; letter-spacing: 4px; }
    .page-hero { height: 35vh; min-height: 260px; }

    .stats-grid { grid-template-columns: 1fr 1fr; }
    .services-layout,
    .method-layout,
    .two-col,
    .contact-layout { grid-template-columns: 1fr; }
    .showcase-grid.cols-2,
    .showcase-grid.cols-3,
    .case-gallery .gallery-grid,
    .case-gallery .gallery-grid.cols-3 { grid-template-columns: 1fr; }
    .resource-cards { grid-template-columns: 1fr 1fr; }
    .feature-strip { grid-template-columns: 1fr; }
    footer { flex-direction: column; gap: 16px; text-align: center; }
}