/* ==================== 变量 ==================== */
:root {
    --dark-primary: #080c24;
    --dark-secondary: #0f1631;
    --dark-card: #161f3a;
    --dark-hover: #1e2942;
    --dark-input: #0d1228;
    --gold: #c9a96e;
    --gold-light: #e0c69a;
    --gold-dark: #a8895a;
    --gold-glow: rgba(201, 169, 110, 0.15);
    --text-light: #e8edf5;
    --text-gray: #8892a6;
    --text-dark: #2d3436;
    --white: #ffffff;
    --gradient-gold: linear-gradient(135deg, #c9a96e 0%, #e0c69a 100%);
    --gradient-gold-shine: linear-gradient(135deg, #c9a96e 0%, #f0d9a8 50%, #c9a96e 100%);
    --gradient-dark: linear-gradient(135deg, #080c24 0%, #0f1631 100%);
    --gradient-card: linear-gradient(145deg, rgba(22, 31, 58, 0.95) 0%, rgba(15, 22, 49, 0.95) 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 30px 80px rgba(0, 0, 0, 0.4);
    --shadow-gold: 0 8px 30px rgba(201, 169, 110, 0.25);
    --shadow-gold-hover: 0 12px 40px rgba(201, 169, 110, 0.4);
    --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.03);
    --shadow-card-hover: 0 20px 60px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(201, 169, 110, 0.2);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 14px;
    --radius-sm: 8px;
    --max-width: 1280px;
}

/* ==================== 基础重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    font-weight: 400;
    line-height: 1.7;
    color: var(--text-light);
    background: var(--dark-primary);
    background-image:
        radial-gradient(circle at 20% 50%, rgba(201, 169, 110, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(201, 169, 110, 0.02) 0%, transparent 50%);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(8, 12, 36, 0.7);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid rgba(201, 169, 110, 0.08);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(8, 12, 36, 0.92);
    backdrop-filter: blur(24px) saturate(180%);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.35), 0 1px 0 rgba(201, 169, 110, 0.1);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
}

.nav-logo i {
    color: var(--gold);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-light);
    border-radius: 6px;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: width 0.3s ease;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

/* 下拉菜单 */
.nav-dropdown {
    position: relative;
}
.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    min-width: 200px;
    background: rgba(15, 20, 50, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(201, 169, 110, 0.15);
    border-radius: 10px;
    padding: 8px 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    z-index: 1001;
}
.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.nav-dropdown-menu li {
    display: block;
}
.nav-dropdown-menu li a {
    display: block;
    padding: 10px 18px;
    color: var(--text-light);
    font-size: 0.9rem;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.nav-dropdown-menu li a:hover {
    background: rgba(201, 169, 110, 0.12);
    color: var(--gold);
}

.nav-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--gold);
    font-weight: 600;
    font-size: 0.95rem;
}

.nav-phone i {
    font-size: 0.9rem;
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==================== Hero ==================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
}

.hero-slides {
    width: 100%;
    height: 100%;
    position: relative;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transform: scale(1.05);
    animation: heroZoom 8s ease-in-out infinite alternate;
}

@keyframes heroZoom {
    from { transform: scale(1.05); }
    to { transform: scale(1.15); }
}

.hero-slide::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 200px;
    background: linear-gradient(to bottom, transparent 0%, rgba(8, 12, 36, 0.7) 100%);
    pointer-events: none;
    z-index: 1;
}

.hero-slide-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 40px 48px;
    transform: translateY(30px);
    opacity: 0;
    transition: all 1s ease 0.3s;
    background: rgba(8, 12, 36, 0.25);
    backdrop-filter: blur(8px) saturate(120%);
    -webkit-backdrop-filter: blur(8px) saturate(120%);
    border-radius: 20px;
    border: 1px solid rgba(201, 169, 110, 0.12);
}

.hero-slide.active .hero-slide-content {
    transform: translateY(0);
    opacity: 1;
}

.hero-slide-content h1 {
    font-size: 3.5rem;
    font-weight: 900;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: 2px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.95), 0 0 30px rgba(0, 0, 0, 0.6);
}

.hero-slide-content .subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--gold);
    margin-bottom: 24px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.95);
}

.hero-slide-content .description {
    font-size: 1.1rem;
    color: #e8e8e8;
    line-height: 1.8;
    max-width: 650px;
    margin: 0 auto 36px;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.9);
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    background: var(--gradient-gold-shine);
    background-size: 200% auto;
    color: var(--dark-primary);
    font-weight: 600;
    font-size: 1rem;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-gold);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-gold-hover);
    background-position: right center;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: var(--white);
    font-weight: 600;
    font-size: 1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--dark-primary);
    border-color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(255, 255, 255, 0.15);
}

/* Hero dots */
.hero-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.hero-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.hero-dot.active {
    background: var(--gold);
    transform: scale(1.3);
}

/* Hero arrows */
.hero-arrows {
    position: absolute;
    top: 50%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 10;
    transform: translateY(-50%);
}

.hero-arrow {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
}

.hero-arrow:hover {
    background: var(--gradient-gold);
    border-color: var(--gold);
    color: var(--dark-primary);
    transform: scale(1.1);
    box-shadow: var(--shadow-gold);
}

/* ==================== 统计数据 ==================== */
.stats-bar {
    background: var(--dark-secondary);
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=abstract%20dark%20blue%20technology%20background%20with%20subtle%20golden%20particles%20and%20geometric%20lines%20premium%20corporate%20feel%20minimalist&image_size=landscape_16_9');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding: 60px 0;
    border-bottom: 1px solid rgba(201, 169, 110, 0.1);
    position: relative;
}

.stats-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(8, 12, 36, 0.92) 0%, rgba(15, 22, 49, 0.88) 100%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    padding: 20px;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.stat-item:last-child {
    border-right: none;
}

.stat-item:hover .stat-icon {
    transform: scale(1.15);
}

.stat-item:hover .stat-value {
    text-shadow: 0 0 30px rgba(201, 169, 110, 0.3);
}

.stat-icon {
    font-size: 2rem;
    color: var(--gold);
    margin-bottom: 12px;
    transition: var(--transition);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--white);
    margin-bottom: 4px;
    transition: var(--transition);
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-gray);
}

/* ==================== 通用Section ==================== */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-label {
    display: inline-block;
    font-size: 0.8rem;
    letter-spacing: 4px;
    color: var(--gold);
    margin-bottom: 14px;
    font-weight: 600;
    padding: 6px 20px;
    border: 1px solid rgba(201, 169, 110, 0.2);
    border-radius: 50px;
    background: rgba(201, 169, 110, 0.05);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.section-header.light .section-title {
    color: var(--white);
}

.section-line {
    width: 60px;
    height: 3px;
    background: var(--gradient-gold);
    margin: 0 auto 20px;
    border-radius: 2px;
    position: relative;
}

.section-line::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: var(--gold);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--gold);
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ==================== 服务板块 ==================== */
.services-section {
    background: var(--dark-primary);
    background-image: radial-gradient(circle at 10% 10%, rgba(201, 169, 110, 0.03) 0%, transparent 30%);
    position: relative;
}

.service-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.service-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 32px;
    background: var(--dark-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 500;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-tab i {
    font-size: 1.1rem;
}

.service-tab:hover {
    border-color: rgba(201, 169, 110, 0.4);
    color: var(--gold);
    box-shadow: 0 4px 20px rgba(201, 169, 110, 0.1);
}

.service-tab.active {
    background: var(--gradient-gold);
    color: var(--dark-primary);
    border-color: transparent;
    font-weight: 600;
    box-shadow: var(--shadow-gold);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--gradient-card);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: var(--shadow-card);
    position: relative;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-gold);
    opacity: 0;
    transition: var(--transition);
    z-index: 3;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(201, 169, 110, 0.15);
}

.service-card:hover::before {
    opacity: 1;
}

.service-card-img {
    width: 100%;
    height: 220px;
    overflow: hidden;
    position: relative;
}

.service-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.service-card-img::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 50%, rgba(10, 14, 39, 0.6) 100%);
}

.service-card-icon {
    position: absolute;
    bottom: -20px;
    left: 24px;
    width: 56px;
    height: 56px;
    background: var(--gradient-gold);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--dark-primary);
    z-index: 2;
    box-shadow: var(--shadow-gold);
    transition: var(--transition);
}

.service-card:hover .service-card-icon {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: var(--shadow-gold-hover);
}

.service-card-body {
    padding: 32px 24px 24px;
}

.service-card-body h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 8px;
}

.service-card-body .short-desc {
    font-size: 0.9rem;
    color: var(--gold);
    margin-bottom: 16px;
}

.service-card-body .full-desc {
    font-size: 0.9rem;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.service-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.service-feature-tag {
    padding: 4px 14px;
    background: rgba(201, 169, 110, 0.08);
    border: 1px solid rgba(201, 169, 110, 0.15);
    color: var(--gold-light);
    font-size: 0.8rem;
    border-radius: 50px;
}

/* ==================== 关于我们 ==================== */
.about-section {
    background: var(--dark-secondary);
    background-image: radial-gradient(circle at 80% 20%, rgba(201, 169, 110, 0.04) 0%, transparent 40%);
    position: relative;
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.about-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-block:nth-child(even) {
    direction: rtl;
}

.about-block:nth-child(even) .about-text {
    direction: ltr;
}

.about-block:nth-child(even) .about-img {
    direction: ltr;
}

.about-img {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
    border: 1px solid rgba(201, 169, 110, 0.1);
}

.about-img::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(201, 169, 110, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

.about-img img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.about-img:hover img {
    transform: scale(1.05);
}

.about-text h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
    position: relative;
    padding-left: 20px;
}

.about-text h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 4px;
    height: 28px;
    background: var(--gradient-gold);
    border-radius: 2px;
}

.about-text p {
    font-size: 1rem;
    color: var(--text-gray);
    line-height: 2;
}

/* ==================== 团队 ==================== */
.team-section {
    background: var(--dark-primary);
    background-image: radial-gradient(circle at 20% 80%, rgba(201, 169, 110, 0.04) 0%, transparent 40%);
    position: relative;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.team-card {
    background: var(--gradient-card);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: var(--shadow-card);
    position: relative;
}

.team-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-gold);
    opacity: 0;
    transition: var(--transition);
    z-index: 3;
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(201, 169, 110, 0.15);
}

.team-card:hover::before {
    opacity: 1;
}

.team-photo {
    width: 100%;
    height: 300px;
    overflow: hidden;
    position: relative;
}

.team-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.team-card:hover .team-photo img {
    transform: scale(1.08);
}

.team-photo::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 60%, rgba(10, 14, 39, 0.7) 100%);
}

.team-info {
    padding: 24px;
    text-align: center;
}

.team-info h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 4px;
}

.team-position {
    color: var(--gold);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.team-bio {
    font-size: 0.88rem;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.team-skills {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
}

.team-skill {
    padding: 4px 14px;
    background: rgba(201, 169, 110, 0.08);
    border: 1px solid rgba(201, 169, 110, 0.15);
    color: var(--gold-light);
    font-size: 0.8rem;
    border-radius: 50px;
}

/* ==================== 案例 ==================== */
.cases-section {
    background: var(--dark-secondary);
    background-image: radial-gradient(circle at 90% 90%, rgba(201, 169, 110, 0.03) 0%, transparent 30%);
    position: relative;
}

.cases-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 24px;
    background: rgba(22, 31, 58, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-light);
    font-size: 0.9rem;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: rgba(201, 169, 110, 0.4);
    color: var(--gold);
}

.filter-btn.active {
    background: var(--gradient-gold);
    color: var(--dark-primary);
    border-color: transparent;
    font-weight: 600;
    box-shadow: var(--shadow-gold);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.case-card {
    background: var(--gradient-card);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: var(--shadow-card);
    position: relative;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-gold);
    opacity: 0;
    transition: var(--transition);
    z-index: 3;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(201, 169, 110, 0.15);
}

.case-card:hover::before {
    opacity: 1;
}

.case-img {
    width: 100%;
    height: 240px;
    overflow: hidden;
    position: relative;
}

.case-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.case-category {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 14px;
    background: rgba(201, 169, 110, 0.9);
    color: var(--dark-primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 50px;
    z-index: 2;
}

.case-body {
    padding: 24px;
}

.case-body h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 8px;
}

.case-client {
    font-size: 0.85rem;
    color: var(--gold);
    margin-bottom: 12px;
}

.case-desc {
    font-size: 0.88rem;
    color: var(--text-gray);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 12px;
}

.case-date {
    font-size: 0.8rem;
    color: var(--text-gray);
    opacity: 0.6;
}

/* ==================== 学生作品 ==================== */
.student-works-section {
    background: var(--dark-primary);
    background-image: radial-gradient(circle at 50% 50%, rgba(201, 169, 110, 0.03) 0%, transparent 50%);
    position: relative;
}

.student-works-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--gold), transparent);
}

.student-works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.student-work-card {
    background: var(--gradient-card);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow: var(--shadow-card);
    position: relative;
}

.student-work-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-gold);
    opacity: 0;
    transition: var(--transition);
    z-index: 3;
}

.student-work-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(201, 169, 110, 0.15);
}

.student-work-card:hover::before {
    opacity: 1;
}

.student-work-img {
    width: 100%;
    height: 220px;
    overflow: hidden;
    position: relative;
}

.student-work-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.student-work-card:hover .student-work-img img {
    transform: scale(1.08);
}

.student-work-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 14px;
    background: rgba(201, 169, 110, 0.9);
    color: var(--dark-primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 50px;
    z-index: 2;
}

.student-work-body {
    padding: 24px;
}

.student-work-body h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 4px;
}

.student-name {
    font-size: 0.9rem;
    color: var(--gold);
    margin-bottom: 12px;
}

.student-name span {
    color: var(--text-gray);
    font-size: 0.85rem;
}

.student-work-desc {
    font-size: 0.88rem;
    color: var(--text-gray);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
}

.student-work-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.student-work-date {
    font-size: 0.8rem;
    color: var(--text-gray);
    opacity: 0.6;
}

.student-work-link {
    color: var(--gold);
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.student-work-link:hover {
    color: var(--gold-light);
}

/* ==================== 联系我们 ==================== */
.contact-section {
    background: var(--dark-secondary);
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=modern%20office%20building%20exterior%20at%20dusk%20with%20warm%20golden%20lights%20professional%20corporate%20architecture%20dark%20blue%20sky%20premium%20business%20atmosphere&image_size=landscape_16_9');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
}

.contact-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(8, 12, 36, 0.93) 0%, rgba(15, 22, 49, 0.90) 100%);
}

.contact-section .container {
    position: relative;
    z-index: 1;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-gold);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--dark-primary);
    flex-shrink: 0;
    box-shadow: var(--shadow-gold);
}

.contact-item h4 {
    font-size: 1rem;
    color: var(--white);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 0.9rem;
    color: var(--text-gray);
}

.contact-form-wrapper {
    background: rgba(22, 31, 58, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 40px;
    border-radius: var(--radius);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: var(--shadow-card);
}

.contact-form-wrapper h3 {
    font-size: 1.4rem;
    color: var(--white);
    margin-bottom: 24px;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    padding: 14px 16px;
    background: var(--dark-primary);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    color: var(--text-light);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    width: 100%;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-gray);
    opacity: 0.6;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.1);
}

.contact-form select {
    cursor: pointer;
}

.contact-form textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-form button {
    align-self: flex-start;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--dark-primary);
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=abstract%20dark%20navy%20blue%20background%20with%20subtle%20golden%20geometric%20patterns%20and%20dots%20premium%20corporate%20design%20minimalist%20elegant&image_size=landscape_16_9');
    background-size: cover;
    background-position: center;
    padding: 60px 0 30px;
    border-top: 1px solid rgba(201, 169, 110, 0.1);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(8, 12, 36, 0.95) 0%, rgba(8, 12, 36, 0.98) 100%);
}

.footer .container {
    position: relative;
    z-index: 1;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

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

.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-gray);
    line-height: 1.8;
}

.footer-links h4,
.footer-contact h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-links h4::after,
.footer-contact h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 30px;
    height: 2px;
    background: var(--gold);
}

.footer-links a {
    display: block;
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--gold);
    padding-left: 5px;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.footer-contact p i {
    color: var(--gold);
    width: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-gray);
    opacity: 0.7;
    margin-bottom: 4px;
}

/* ==================== 回到顶部 ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--gradient-gold);
    color: var(--dark-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-gold);
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(201, 169, 110, 0.5);
}

/* ==================== 动画 ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 图片懒加载占位 ==================== */
img[loading="lazy"] {
    background: linear-gradient(110deg, var(--dark-card) 8%, var(--dark-hover) 18%, var(--dark-card) 33%);
    background-size: 200% 100%;
    animation: shimmer 1.5s linear infinite;
}

@keyframes shimmer {
    to { background-position-x: -200%; }
}

img {
    transition: opacity 0.3s ease;
}

img[data-src] {
    opacity: 0;
}

img:not([data-src]) {
    opacity: 1;
}

/* ==================== 字体加载优化 ==================== */
.font-loading {
    visibility: hidden;
}

.fonts-loaded .font-loading {
    visibility: visible;
}

/* ==================== 减少动画 (无障碍) ==================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ==================== 响应式 ==================== */

/* 平板 */
@media (max-width: 1024px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 14, 39, 0.98);
        flex-direction: column;
        padding: 20px;
        gap: 5px;
        backdrop-filter: blur(20px);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-link {
        padding: 12px 16px;
        text-align: center;
    }

    .nav-dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        display: none;
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0;
        margin-top: 5px;
    }
    .nav-dropdown.open .nav-dropdown-menu {
        display: block;
    }
    .nav-dropdown-menu li a {
        text-align: center;
        padding: 10px 16px;
        font-size: 0.85rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-phone {
        display: none;
    }

    .hero-slide-content h1 {
        font-size: 2.5rem;
    }

    .hero-slide-content .subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-item:nth-child(2) {
        border-right: none;
    }

    .about-block {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .about-block:nth-child(even) {
        direction: ltr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

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

/* 手机 */
@media (max-width: 640px) {
    .container {
        padding: 0 16px;
    }

    .nav-container {
        height: 60px;
        padding: 0 16px;
    }

    .stats-bar,
    .contact-section,
    .footer {
        background-attachment: scroll;
    }

    .nav-logo {
        font-size: 1.1rem;
    }

    .hero {
        min-height: 500px;
    }

    .hero-slide-content h1 {
        font-size: 1.8rem;
    }

    .hero-slide-content .subtitle {
        font-size: 1rem;
    }

    .hero-slide-content .description {
        font-size: 0.9rem;
    }

    .hero-btns {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary,
    .btn-outline {
        padding: 12px 28px;
        font-size: 0.9rem;
    }

    .hero-arrow {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .section-desc {
        font-size: 0.9rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .stat-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        padding-bottom: 20px;
    }

    .stat-value {
        font-size: 1.8rem;
    }

    .service-tab {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .services-grid,
    .team-grid,
    .cases-grid,
    .student-works-grid {
        grid-template-columns: 1fr;
    }

    .cases-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form-wrapper {
        padding: 24px;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom p {
        font-size: 0.8rem;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}

/* 大屏优化 */
@media (min-width: 1400px) {
    .hero-slide-content h1 {
        font-size: 4rem;
    }
}

/* ============================================================ */
/* ==================== 主题A：科技暗夜(深蓝+香槟金) =========== */
/* ============================================================ */
body.theme-dark-gold {
    --dark-primary: #060a1f;
    --dark-secondary: #0c1228;
    --dark-card: #1a2244;
    --dark-hover: #232c4e;
    --dark-input: #0a0f24;
    --gold: #d4b07a;
    --gold-light: #ecd5a8;
    --gold-dark: #9a7c4a;
    --gold-glow: rgba(212, 176, 122, 0.15);
    --text-light: #e8edf5;
    --text-gray: #7d8499;
    --gradient-gold: linear-gradient(135deg, #d4b07a 0%, #ecd5a8 100%);
    --gradient-gold-shine: linear-gradient(135deg, #d4b07a 0%, #f0d9a8 50%, #d4b07a 100%);
    --gradient-card: linear-gradient(145deg, rgba(26, 34, 68, 0.95) 0%, rgba(12, 18, 40, 0.95) 100%);
    --shadow-gold: 0 8px 30px rgba(212, 176, 122, 0.25);
    --shadow-gold-hover: 0 12px 40px rgba(212, 176, 122, 0.4);
}

/* ============================================================ */
/* ==================== 主题B：清新海洋(白底+蓝绿) ============ */
/* ============================================================ */
body.theme-light-platinum {
    --dark-primary: #f0f7fa;
    --dark-secondary: #ffffff;
    --dark-card: #ffffff;
    --dark-hover: #e8f4f8;
    --dark-input: #f0f7fa;
    --gold: #0891b2;
    --gold-light: #06b6d4;
    --gold-dark: #0e7490;
    --gold-glow: rgba(8, 145, 178, 0.12);
    --text-light: #1e3a5f;
    --text-gray: #64748b;
    --gradient-gold: linear-gradient(135deg, #0891b2 0%, #06b6d4 100%);
    --gradient-gold-shine: linear-gradient(135deg, #0891b2 0%, #22d3ee 50%, #0891b2 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f0f7fa 100%);
    --shadow-gold: 0 8px 30px rgba(8, 145, 178, 0.12);
    --shadow-gold-hover: 0 12px 40px rgba(8, 145, 178, 0.2);
    --shadow-card: 0 4px 20px rgba(8, 145, 178, 0.06), 0 0 0 1px rgba(8, 145, 178, 0.04);
    --shadow-card-hover: 0 12px 40px rgba(8, 145, 178, 0.12), 0 0 0 1px rgba(8, 145, 178, 0.08);
}

body.theme-light-platinum {
    background: var(--dark-primary);
    background-image:
        radial-gradient(circle at 20% 50%, rgba(8, 145, 178, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.04) 0%, transparent 50%);
    color: var(--text-light);
}

body.theme-light-platinum .navbar {
    background: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid rgba(8, 145, 178, 0.08);
}

body.theme-light-platinum .navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 20px rgba(8, 145, 178, 0.06);
}

body.theme-light-platinum .nav-link {
    color: var(--text-light);
}

body.theme-light-platinum .nav-link:hover,
body.theme-light-platinum .nav-link.active {
    color: var(--gold);
}

body.theme-light-platinum .nav-dropdown-menu {
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid rgba(8, 145, 178, 0.1);
    box-shadow: 0 10px 40px rgba(8, 145, 178, 0.12);
}
body.theme-light-platinum .nav-dropdown-menu li a {
    color: var(--text-light);
}
body.theme-light-platinum .nav-dropdown-menu li a:hover {
    background: rgba(8, 145, 178, 0.08);
    color: var(--gold);
}

body.theme-light-platinum .nav-phone {
    background: rgba(8, 145, 178, 0.06);
    border: 1px solid rgba(8, 145, 178, 0.12);
}

body.theme-light-platinum .hero-slide::before {
    background: linear-gradient(135deg, rgba(240, 247, 250, 0.75) 0%, rgba(255, 255, 255, 0.55) 50%, rgba(240, 247, 250, 0.8) 100%);
}

body.theme-light-platinum .hero-slide::after {
    background: linear-gradient(to bottom, transparent 0%, rgba(240, 247, 250, 0.5) 100%);
}

body.theme-light-platinum .hero-slide-content h1 {
    color: var(--text-light);
    text-shadow: 0 2px 20px rgba(255, 255, 255, 0.6);
}

body.theme-light-platinum .hero-slide-content .subtitle {
    color: var(--gold);
    text-shadow: none;
}

body.theme-light-platinum .hero-slide-content .description {
    color: var(--text-gray);
}

body.theme-light-platinum .hero-arrow {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(8, 145, 178, 0.12);
    color: var(--text-light);
}

body.theme-light-platinum .hero-arrow:hover {
    background: var(--gradient-gold);
    color: #fff;
    box-shadow: var(--shadow-gold);
}

body.theme-light-platinum .hero-dots button {
    background: rgba(8, 145, 178, 0.3);
}

body.theme-light-platinum .hero-dots button.active {
    background: var(--gold);
}

body.theme-light-platinum .stats-bar {
    background: var(--dark-secondary);
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=clean%20fresh%20white%20background%20with%20subtle%20ocean%20blue%20and%20teal%20geometric%20lines%20and%20dots%20professional%20corporate%20feel%20bright%20airy%20and%20modern%20minimalist&image_size=landscape_16_9');
}

body.theme-light-platinum .stats-bar::before {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.92) 0%, rgba(240, 247, 250, 0.88) 100%);
}

body.theme-light-platinum .stat-value {
    color: var(--gold);
}

body.theme-light-platinum .stat-icon {
    color: var(--gold-light);
}

body.theme-light-platinum .stat-item {
    border-right: 1px solid rgba(8, 145, 178, 0.08);
}

body.theme-light-platinum .stat-item:hover .stat-value {
    text-shadow: 0 0 30px rgba(8, 145, 178, 0.2);
}

body.theme-light-platinum .section-title {
    color: var(--text-light);
}

body.theme-light-platinum .section-desc {
    color: var(--text-gray);
}

body.theme-light-platinum .section-label {
    border: 1px solid rgba(8, 145, 178, 0.15);
    background: rgba(8, 145, 178, 0.05);
    color: var(--gold);
}

body.theme-light-platinum .service-tab {
    background: var(--dark-card);
    border: 1px solid rgba(8, 145, 178, 0.08);
    color: var(--text-light);
    box-shadow: 0 2px 10px rgba(8, 145, 178, 0.04);
}

body.theme-light-platinum .service-tab:hover {
    border-color: rgba(8, 145, 178, 0.25);
    color: var(--gold);
    box-shadow: 0 4px 20px rgba(8, 145, 178, 0.08);
}

body.theme-light-platinum .service-tab.active {
    background: var(--gradient-gold);
    color: #fff;
    box-shadow: var(--shadow-gold);
}

body.theme-light-platinum .service-card,
body.theme-light-platinum .team-card,
body.theme-light-platinum .case-card,
body.theme-light-platinum .student-work-card {
    border: 1px solid rgba(8, 145, 178, 0.06);
}

body.theme-light-platinum .service-card::before,
body.theme-light-platinum .team-card::before,
body.theme-light-platinum .case-card::before,
body.theme-light-platinum .student-work-card::before {
    background: var(--gradient-gold);
}

body.theme-light-platinum .service-card:hover,
body.theme-light-platinum .team-card:hover,
body.theme-light-platinum .case-card:hover,
body.theme-light-platinum .student-work-card:hover {
    border-color: rgba(8, 145, 178, 0.15);
}

body.theme-light-platinum .service-card-title {
    color: var(--text-light);
}

body.theme-light-platinum .service-card-desc {
    color: var(--text-gray);
}

body.theme-light-platinum .service-feature-tag {
    color: var(--gold);
    background: rgba(8, 145, 178, 0.06);
}

body.theme-light-platinum .about-section {
    background: var(--dark-secondary);
    background-image: radial-gradient(circle at 80% 20%, rgba(8, 145, 178, 0.04) 0%, transparent 40%);
}

body.theme-light-platinum .about-text h3 {
    color: var(--text-light);
}

body.theme-light-platinum .about-text p {
    color: var(--text-gray);
}

body.theme-light-platinum .about-text li {
    color: var(--text-gray);
}

body.theme-light-platinum .about-text li::before {
    color: var(--gold);
}

body.theme-light-platinum .team-section {
    background: var(--dark-primary);
    background-image: radial-gradient(circle at 20% 80%, rgba(8, 145, 178, 0.04) 0%, transparent 40%);
}

body.theme-light-platinum .team-name {
    color: var(--text-light);
}

body.theme-light-platinum .team-position {
    color: var(--gold);
}

body.theme-light-platinum .team-skill {
    color: var(--gold-light);
}

body.theme-light-platinum .cases-section {
    background: var(--dark-secondary);
    background-image: radial-gradient(circle at 90% 90%, rgba(8, 145, 178, 0.04) 0%, transparent 30%);
}

body.theme-light-platinum .case-title {
    color: var(--text-light);
}

body.theme-light-platinum .case-client {
    color: var(--gold);
}

body.theme-light-platinum .case-desc {
    color: var(--text-gray);
}

body.theme-light-platinum .filter-btn {
    background: var(--dark-card);
    border: 1px solid rgba(8, 145, 178, 0.08);
    color: var(--text-light);
}

body.theme-light-platinum .filter-btn:hover {
    border-color: rgba(8, 145, 178, 0.25);
    color: var(--gold);
}

body.theme-light-platinum .filter-btn.active {
    background: var(--gradient-gold);
    color: #fff;
    box-shadow: var(--shadow-gold);
}

body.theme-light-platinum .student-works-section {
    background: var(--dark-primary);
    background-image: radial-gradient(circle at 50% 50%, rgba(8, 145, 178, 0.04) 0%, transparent 50%);
}

body.theme-light-platinum .student-work-title {
    color: var(--text-light);
}

body.theme-light-platinum .student-name {
    color: var(--gold);
}

body.theme-light-platinum .student-work-desc {
    color: var(--text-gray);
}

body.theme-light-platinum .contact-section {
    background: var(--dark-secondary);
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=clean%20modern%20glass%20office%20building%20with%20bright%20blue%20sky%20and%20ocean%20view%20fresh%20daylight%20professional%20architecture%20minimalist%20white%20and%20teal%20theme%20airy&image_size=landscape_16_9');
}

body.theme-light-platinum .contact-section::before {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.93) 0%, rgba(240, 247, 250, 0.90) 100%);
}

body.theme-light-platinum .contact-form-wrapper {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(8, 145, 178, 0.08);
    box-shadow: var(--shadow-card);
}

body.theme-light-platinum .contact-form-wrapper h3 {
    color: var(--text-light);
}

body.theme-light-platinum .contact-form input,
body.theme-light-platinum .contact-form textarea {
    background: var(--dark-input);
    border: 1px solid rgba(8, 145, 178, 0.12);
    color: var(--text-light);
}

body.theme-light-platinum .contact-form input:focus,
body.theme-light-platinum .contact-form textarea:focus {
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
}

body.theme-light-platinum .contact-form input::placeholder,
body.theme-light-platinum .contact-form textarea::placeholder {
    color: var(--text-gray);
}

body.theme-light-platinum .contact-info-item {
    color: var(--text-gray);
}

body.theme-light-platinum .contact-info-item strong {
    color: var(--text-light);
}

body.theme-light-platinum .contact-info-item i {
    color: var(--gold);
}

body.theme-light-platinum .footer {
    background: var(--dark-primary);
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=clean%20fresh%20white%20background%20with%20subtle%20ocean%20blue%20and%20teal%20geometric%20patterns%20and%20dots%20professional%20corporate%20design%20elegant%20airy%20minimalist&image_size=landscape_16_9');
}

body.theme-light-platinum .footer::before {
    background: linear-gradient(180deg, rgba(240, 247, 250, 0.95) 0%, rgba(240, 247, 250, 0.98) 100%);
}

body.theme-light-platinum .footer-col h4 {
    color: var(--text-light);
}

body.theme-light-platinum .footer-col a {
    color: var(--text-gray);
}

body.theme-light-platinum .footer-col a:hover {
    color: var(--gold);
}

body.theme-light-platinum .footer-bottom p {
    color: var(--text-gray);
}

body.theme-light-platinum .btn-primary {
    background: var(--gradient-gold);
    color: #fff;
}

body.theme-light-platinum .btn-outline {
    border: 2px solid rgba(8, 145, 178, 0.4);
    color: var(--text-light);
    background: rgba(255, 255, 255, 0.4);
}

body.theme-light-platinum .btn-outline:hover {
    background: var(--gradient-gold);
    color: #fff;
    border-color: transparent;
}

body.theme-light-platinum .back-to-top {
    background: var(--gradient-gold);
    color: #fff;
}

body.theme-light-platinum .menu-toggle {
    color: var(--text-light);
}

body.theme-light-platinum .mobile-menu {
    background: rgba(255, 255, 255, 0.98);
}

body.theme-light-platinum .mobile-menu a {
    color: var(--text-light);
}

body.theme-light-platinum img[loading="lazy"] {
    background: linear-gradient(110deg, #e8f4f8 8%, #d4ecf3 18%, #e8f4f8 33%);
    background-size: 200% 100%;
}

/* ============================================================ */
/* ==================== 主题C：墨玉翡翠(深绿+青铜) ============ */
/* ============================================================ */
body.theme-emerald-bronze {
    --dark-primary: #061410;
    --dark-secondary: #0a1f18;
    --dark-card: #0f2a20;
    --dark-hover: #163528;
    --dark-input: #061410;
    --gold: #b08d57;
    --gold-light: #d4af7a;
    --gold-dark: #8a6d3b;
    --gold-glow: rgba(176, 141, 87, 0.15);
    --text-light: #d8e8e0;
    --text-gray: #6b8a7d;
    --gradient-gold: linear-gradient(135deg, #b08d57 0%, #d4af7a 100%);
    --gradient-gold-shine: linear-gradient(135deg, #b08d57 0%, #e0c490 50%, #b08d57 100%);
    --gradient-card: linear-gradient(145deg, rgba(15, 42, 32, 0.95) 0%, rgba(10, 31, 24, 0.95) 100%);
    --shadow-gold: 0 8px 30px rgba(176, 141, 87, 0.25);
    --shadow-gold-hover: 0 12px 40px rgba(176, 141, 87, 0.4);
    --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(176, 141, 87, 0.04);
    --shadow-card-hover: 0 20px 60px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(176, 141, 87, 0.2);
}

body.theme-emerald-bronze {
    background: var(--dark-primary);
    background-image:
        radial-gradient(circle at 20% 50%, rgba(176, 141, 87, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(176, 141, 87, 0.02) 0%, transparent 50%);
}

body.theme-emerald-bronze .navbar {
    background: rgba(6, 20, 16, 0.7);
    border-bottom: 1px solid rgba(176, 141, 87, 0.08);
}

body.theme-emerald-bronze .navbar.scrolled {
    background: rgba(6, 20, 16, 0.92);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.35), 0 1px 0 rgba(176, 141, 87, 0.1);
}

body.theme-emerald-bronze .nav-dropdown-menu {
    background: rgba(10, 31, 24, 0.95);
    border: 1px solid rgba(176, 141, 87, 0.15);
}
body.theme-emerald-bronze .nav-dropdown-menu li a:hover {
    background: rgba(176, 141, 87, 0.12);
}

body.theme-emerald-bronze .hero-slide::before {
    background: linear-gradient(135deg, rgba(6, 20, 16, 0.88) 0%, rgba(10, 31, 24, 0.72) 50%, rgba(6, 20, 16, 0.85) 100%);
}

body.theme-emerald-bronze .hero-slide::after {
    background: linear-gradient(to bottom, transparent 0%, rgba(6, 20, 16, 0.6) 100%);
}

body.theme-emerald-bronze .stats-bar {
    background: var(--dark-secondary);
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=abstract%20dark%20emerald%20green%20background%20with%20subtle%20bronze%20gold%20particles%20and%20geometric%20lines%20premium%20luxury%20feel%20oriental%20minimalist&image_size=landscape_16_9');
}

body.theme-emerald-bronze .stats-bar::before {
    background: linear-gradient(135deg, rgba(6, 20, 16, 0.92) 0%, rgba(10, 31, 24, 0.88) 100%);
}

body.theme-emerald-bronze .about-section {
    background: var(--dark-secondary);
    background-image: radial-gradient(circle at 80% 20%, rgba(176, 141, 87, 0.04) 0%, transparent 40%);
}

body.theme-emerald-bronze .team-section {
    background: var(--dark-primary);
    background-image: radial-gradient(circle at 20% 80%, rgba(176, 141, 87, 0.04) 0%, transparent 40%);
}

body.theme-emerald-bronze .cases-section {
    background: var(--dark-secondary);
    background-image: radial-gradient(circle at 90% 90%, rgba(176, 141, 87, 0.03) 0%, transparent 30%);
}

body.theme-emerald-bronze .student-works-section {
    background: var(--dark-primary);
    background-image: radial-gradient(circle at 50% 50%, rgba(176, 141, 87, 0.03) 0%, transparent 50%);
}

body.theme-emerald-bronze .contact-section {
    background: var(--dark-secondary);
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=modern%20luxury%20building%20at%20dusk%20with%20warm%20bronze%20lights%20surrounded%20by%20green%20plants%20professional%20architecture%20dark%20emerald%20sky%20premium%20oriental%20atmosphere&image_size=landscape_16_9');
}

body.theme-emerald-bronze .contact-section::before {
    background: linear-gradient(135deg, rgba(6, 20, 16, 0.93) 0%, rgba(10, 31, 24, 0.90) 100%);
}

body.theme-emerald-bronze .contact-form-wrapper {
    background: rgba(15, 42, 32, 0.85);
}

body.theme-emerald-bronze .footer {
    background: var(--dark-primary);
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=abstract%20dark%20emerald%20green%20background%20with%20subtle%20bronze%20gold%20geometric%20patterns%20and%20jade%20elements%20premium%20oriental%20luxury%20design%20minimalist%20elegant&image_size=landscape_16_9');
}

body.theme-emerald-bronze .footer::before {
    background: linear-gradient(180deg, rgba(6, 20, 16, 0.95) 0%, rgba(6, 20, 16, 0.98) 100%);
}