/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-color: #0a0a0a;
    --bg-darker: #050505;
    --text-color: #e5e5e5;
    --text-muted: #a3a3a3;
    --gold-color: #fbbf24;
    --gold-muted: rgba(251, 191, 36, 0.3);
    --card-bg: #171717;
    --nav-bg: rgba(10, 10, 10, 0.9);
    --gold-gradient: linear-gradient(135deg, #fbbf24, #d97706);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

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

.rounded-lg { border-radius: 1rem; }
.rounded-xl { border-radius: 1.5rem; }
.rounded-2xl { border-radius: 2rem; }
.rounded-3xl { border-radius: 3rem; }

.text-center { text-center: center; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-12 { margin-bottom: 3rem; }
.mb-16 { margin-bottom: 4rem; }
.py-24 { padding-top: 6rem; padding-bottom: 6rem; }
.py-40 { padding-top: 10rem; padding-bottom: 10rem; }

.gold-text { color: var(--gold-color); }
.gold-link { color: var(--gold-color); font-weight: 600; display: inline-flex; align-items: center; gap: 0.25rem; }
.gold-link:hover { text-decoration: underline; }

.bg-darker { background-color: var(--bg-darker); }

/* Grid System */
.grid { display: grid; gap: 2rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 5rem;
    background-color: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gold-muted);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--gold-color);
    letter-spacing: -0.05em;
    line-height: 1;
}

.logo-sub {
    font-size: 0.6rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-top: 0.25rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-item {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
}

.nav-item:hover, .nav-item.active {
    color: var(--gold-color);
}

.menu-toggle {
    display: none;
    color: var(--text-muted);
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .menu-toggle { display: block; }
}

/* Mobile Nav */
.mobile-nav {
    position: fixed;
    top: 5rem;
    left: 0;
    width: 100%;
    background-color: #111;
    border-bottom: 1px solid #222;
    z-index: 999;
    display: none;
}

.mobile-nav.active { display: block; }

.mobile-nav-links {
    padding: 1rem 1.5rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.mobile-nav-item {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
}

/* Pages */
.page {
    display: none;
    animation: fadeIn 0.5s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Hero */
.hero {
    position: relative;
    height: 90vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: url('https://tse-mm.bing.com/th?q=高端商务建筑') no-repeat center center/cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(10, 10, 10, 0.5), var(--bg-color));
}

.hero-content {
    position: relative;
    z-index: 10;
}

.hero-title {
    font-size: 5rem;
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 40rem;
    margin-bottom: 2.5rem;
}

@media (max-width: 768px) {
    .hero-title { font-size: 3rem; }
    .hero-subtitle { font-size: 1rem; }
}

/* Buttons */
.btn {
    padding: 1rem 2rem;
    border-radius: 9999px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    font-size: 1rem;
}

.btn-gold {
    background-color: var(--gold-color);
    color: #000;
}

.btn-gold:hover {
    transform: scale(1.05);
}

.btn-outline {
    background: transparent;
    border: 1px solid #333;
    color: #fff;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-black {
    background: #000;
    color: #fff;
}

.btn-white-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #000;
}

/* Sections */
.section {
    padding: 6rem 0;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--gold-color);
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.section-desc {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 3rem;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.stats-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1.5rem;
    border: 1px solid #222;
}

.stat-num {
    font-size: 2rem;
    font-weight: 700;
    margin-top: 1rem;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 0.25rem;
}

.stats-img {
    position: relative;
}

.floating-badge {
    position: absolute;
    bottom: -1.5rem;
    right: -1.5rem;
    background: var(--gold-color);
    color: #000;
    padding: 2rem;
    border-radius: 1.5rem;
    font-weight: 700;
}

.badge-num { font-size: 2.5rem; line-height: 1; }
.badge-text { font-size: 0.875rem; }

@media (max-width: 768px) {
    .stats-grid { grid-template-columns: 1fr; }
    .floating-badge { display: none; }
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid #222;
    border-radius: 1.5rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

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

.card-img {
    height: 15rem;
    overflow: hidden;
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.card-content {
    padding: 1.5rem;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.card-tag {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--gold-color);
    text-transform: uppercase;
}

.card-rating {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    font-size: 0.6rem;
    padding: 0.25rem 0.5rem;
    background: #262626;
    border-radius: 0.25rem;
    color: var(--text-muted);
}

/* News Cards */
.news-card {
    padding: 2rem;
}

.news-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.news-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.news-summary {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* Horizontal Scroll */
.horizontal-scroll {
    display: flex;
    overflow-x: auto;
    gap: 1.5rem;
    padding-bottom: 2rem;
    scrollbar-width: none;
}

.horizontal-scroll::-webkit-scrollbar { display: none; }

.scroll-item {
    min-width: 25rem;
    background: var(--bg-color);
    border-radius: 1.5rem;
    overflow: hidden;
    border: 1px solid #222;
}

.scroll-img { height: 12rem; }
.scroll-img img { width: 100%; height: 100%; object-fit: cover; }
.scroll-content { padding: 1.5rem; }

@media (max-width: 768px) {
    .scroll-item { min-width: 18rem; }
}

/* Promo Banner */
.promo-banner {
    background: linear-gradient(to right, #f59e0b, #d97706);
    padding: 4rem;
    border-radius: 3rem;
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.promo-title {
    font-size: 3rem;
    font-weight: 900;
    color: #000;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.promo-desc {
    color: rgba(0, 0, 0, 0.7);
    font-size: 1.125rem;
    max-width: 30rem;
    margin-bottom: 2.5rem;
    font-weight: 500;
}

.promo-btns { display: flex; gap: 1rem; }

.promo-icon {
    position: absolute;
    right: -2rem;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.1;
    color: #000;
}

.promo-icon i { width: 25rem; height: 25rem; }

@media (max-width: 768px) {
    .promo-banner { padding: 2.5rem; flex-direction: column; text-align: center; }
    .promo-title { font-size: 2rem; }
    .promo-btns { justify-content: center; }
    .promo-icon { display: none; }
}

/* Dynamics */
.dynamic-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: rgba(23, 23, 23, 0.3);
    border: 1px solid #222;
    border-radius: 1rem;
    align-items: center;
}

.dynamic-num {
    width: 3rem;
    height: 3rem;
    background: var(--gold-color);
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.dynamic-date { font-size: 0.7rem; color: var(--text-muted); margin-bottom: 0.25rem; }
.dynamic-title { font-weight: 700; margin-bottom: 0.25rem; }
.dynamic-text { font-size: 0.75rem; color: var(--text-muted); }

/* Products Page */
.page-header { margin-bottom: 4rem; }
.page-title { font-size: 3.5rem; font-weight: 900; margin-bottom: 1rem; }
.page-subtitle { color: var(--text-muted); font-size: 1.125rem; }

.filter-bar {
    background: var(--card-bg);
    border: 1px solid #222;
    padding: 2rem;
    border-radius: 2rem;
    margin-bottom: 3rem;
}

.filter-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 1.5rem;
}

.search-box, .select-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i, .select-box i {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
}

.search-box input, .select-box select {
    width: 100%;
    background: var(--bg-darker);
    border: 1px solid #222;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border-radius: 0.75rem;
    color: #fff;
    outline: none;
    transition: border-color 0.3s;
}

.search-box input:focus, .select-box select:focus {
    border-color: var(--gold-color);
}

@media (max-width: 1024px) {
    .filter-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .filter-grid { grid-template-columns: 1fr; }
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 4rem;
}

.page-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.5rem;
    background: var(--card-bg);
    border: 1px solid #222;
    color: var(--text-muted);
    font-weight: 700;
    cursor: pointer;
}

.page-btn.active {
    background: var(--gold-color);
    color: #000;
    border-color: var(--gold-color);
}

/* About Page */
.about-hero {
    padding: 10rem 0 5rem;
    background: var(--bg-darker);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.history-list li {
    display: flex;
    gap: 1rem;
}

.history-list .year {
    font-weight: 700;
    color: #fff;
    min-width: 4rem;
}

.team-item { text-align: center; }
.team-img {
    width: 12rem;
    height: 12rem;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid #222;
    transition: border-color 0.3s;
}

.team-item:hover .team-img { border-color: var(--gold-color); }
.team-img img { width: 100%; height: 100%; object-fit: cover; }

/* Contact Page */
.info-items { display: flex; flex-direction: column; gap: 2rem; }
.info-item { display: flex; gap: 1.5rem; }
.info-icon {
    width: 3.5rem;
    height: 3.5rem;
    background: var(--card-bg);
    border: 1px solid #222;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold-color);
}

.social-follow { margin-top: 4rem; }
.social-btns { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1.5rem; }
.social-btn {
    padding: 0.5rem 1rem;
    background: var(--card-bg);
    border: 1px solid #222;
    border-radius: 0.5rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    cursor: pointer;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.form-group { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.5rem; }
.form-group label { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; }
.form-group input, .form-group textarea {
    background: var(--bg-darker);
    border: 1px solid #222;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    color: #fff;
    outline: none;
}

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

.map-container {
    margin-top: 6rem;
    height: 24rem;
    border-radius: 2rem;
    overflow: hidden;
    position: relative;
    border: 1px solid #222;
}

.map-img { width: 100%; height: 100%; object-fit: cover; opacity: 0.5; }
.map-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-card {
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(12px);
    padding: 2rem;
    border-radius: 1.5rem;
    border: 1px solid var(--gold-muted);
    text-align: center;
}

.map-card i { font-size: 2rem; margin-bottom: 1rem; }
.map-card h4 { margin-bottom: 0.5rem; }
.map-card p { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 1.5rem; }

/* Footer */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid #111;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-logo { font-size: 1.5rem; font-weight: 700; color: var(--gold-color); margin-bottom: 1.5rem; }
.footer-brand p { color: var(--text-muted); max-width: 25rem; }
.footer-links h3, .footer-contact h3 { font-size: 1rem; margin-bottom: 1.5rem; }
.footer-links ul, .footer-contact ul { display: flex; flex-direction: column; gap: 1rem; }
.footer-links a { color: var(--text-muted); font-size: 0.875rem; }
.footer-links a:hover { color: var(--gold-color); }
.footer-contact li { color: var(--text-muted); font-size: 0.875rem; display: flex; gap: 0.5rem; align-items: center; }

.footer-bottom {
    border-top: 1px solid #111;
    padding-top: 2rem;
    text-align: center;
    color: #444;
    font-size: 0.75rem;
}

@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}

/* Online Service */
.online-service {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 4rem;
    height: 4rem;
    background: var(--gold-color);
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.5);
    z-index: 1000;
    transition: transform 0.3s;
}

.online-service:hover { transform: scale(1.1); }

.tooltip {
    position: absolute;
    right: 100%;
    margin-right: 1rem;
    background: #000;
    color: #fff;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.online-service:hover .tooltip { opacity: 1; }