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

/* ===== 白蓝简约高级主题 ===== */
:root {
    --primary-color: #1f5fe0;          /* 品牌蓝 */
    --primary-deep: #1546ab;           /* 深蓝（悬停/渐变尾） */
    --primary-light: #eaf2ff;          /* 浅蓝底 */
    --secondary-color: #3b82f6;        /* 亮蓝 */
    --accent-color: #e8a33d;           /* 点缀金 */
    --tech-blue: #2563eb;
    --tech-purple: #6366f1;            /* 极少使用的紫蓝点缀 */
    --tech-pink: #3b82f6;
    --dark-bg: #ffffff;
    --dark-card: #ffffff;
    --dark-border: #e8eefb;
    --white: #ffffff;
    --page-bg: #ffffff;
    --page-bg-soft: #f5f9ff;
    --line-soft: #e8eefb;
    --text-primary: #0f1b2d;           /* 标题深蓝黑 */
    --text-secondary: #55637a;         /* 正文灰蓝 */
    --text-muted: #8b96a8;
    --glow-primary: rgba(31, 95, 224, 0.14);
    --glow-secondary: rgba(59, 130, 246, 0.12);
    --glow-accent: rgba(232, 163, 61, 0.18);
    --card-shadow: 0 2px 10px rgba(15, 40, 90, 0.04), 0 12px 30px rgba(15, 40, 90, 0.05);
    --card-shadow-hover: 0 8px 20px rgba(31, 95, 224, 0.08), 0 22px 48px rgba(31, 95, 224, 0.12);
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: clip;
    background: var(--dark-bg);
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* 科技感背景 */
.tech-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    opacity: 0.3;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--primary-color);
    animation: float 15s infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) translateX(100px);
        opacity: 0;
    }
}

/* 导航栏 */
.navbar {
    background: rgba(10, 14, 39, 0.85);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-bottom: 1px solid rgba(0, 212, 255, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.navbar-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, 
        rgba(0, 212, 255, 0.05) 0%, 
        transparent 100%
    );
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
}

.navbar.scrolled .navbar-bg {
    opacity: 1;
}

.navbar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--primary-color), 
        var(--secondary-color), 
        var(--primary-color), 
        transparent
    );
    animation: scanLine 4s linear infinite;
    opacity: 0.6;
}

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

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
    position: relative;
    z-index: 2;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 18px;
    z-index: 3;
}

.logo {
    width: 65px;
    height: 65px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 6px;
    box-shadow: 
        0 0 25px rgba(0, 212, 255, 0.4),
        inset 0 0 20px rgba(123, 47, 247, 0.2);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.logo-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
    animation: logoGlow 3s ease-in-out infinite;
}

@keyframes logoGlow {
    0%, 100% { opacity: 0; transform: scale(0.8); }
    50% { opacity: 0.3; transform: scale(1.2); }
}

.logo:hover {
    transform: scale(1.08) rotate(3deg);
    box-shadow: 
        0 0 40px rgba(0, 212, 255, 0.6),
        inset 0 0 30px rgba(123, 47, 247, 0.3);
}

.logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    border-radius: 10px;
    position: relative;
    z-index: 1;
}

.logo-text {
    font-size: 1.6rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    letter-spacing: 1px;
    position: relative;
}

.logo-text::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0.3;
    transform: scaleX(0);
    transition: transform 0.4s;
}

.logo-section:hover .logo-text::after {
    transform: scaleX(1);
}

.nav-links {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: #E8E8E8;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: 12px 24px;
    font-size: 1rem;
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 8px;
    text-shadow: 0 0 8px rgba(232, 232, 232, 0.3);
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.1), 
        rgba(123, 47, 247, 0.1)
    );
    opacity: 0;
    transition: opacity 0.3s;
    border-radius: 10px;
}

.nav-link:hover::before {
    opacity: 1;
}

.nav-link-icon {
    position: relative;
    z-index: 1;
    font-size: 1.1rem;
    margin-right: 8px;
    transition: all 0.3s;
    display: inline-block;
    filter: drop-shadow(0 0 4px rgba(0, 212, 255, 0.3));
}

.nav-link-text {
    position: relative;
    z-index: 1;
    transition: all 0.3s;
}

.nav-link-indicator {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s;
    box-shadow: 0 0 8px var(--primary-color);
    border-radius: 2px;
}

.nav-link:hover .nav-link-indicator {
    width: 70%;
}

.nav-link:hover {
    color: var(--text-primary);
    text-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
}

.nav-link:hover .nav-link-text {
    transform: translateY(-1px);
}

.nav-link:hover .nav-link-icon {
    transform: translateY(-1px) scale(1.1);
    filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.6));
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    position: relative;
}

.mobile-menu-btn span {
    width: 28px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
    transition: all 0.3s;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

/* 首栏登录/个人中心入口（桌面+移动端始终可见，不随汉堡菜单收起） */
/* nav-user 与 nav-helper 规格对齐 */
.nav-user,
.nav-helper {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 7px 14px;
    border-radius: 20px;
    text-decoration: none;
    color: #fff;
    font-weight: 600;
    font-size: 0.78rem;
    line-height: 1;
    white-space: nowrap;
    z-index: 1001;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-user {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 3px 12px rgba(0, 212, 255, 0.3);
}

.nav-helper {
    border: 1px solid rgba(0, 212, 255, 0.35);
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.14), rgba(123, 47, 247, 0.14));
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    letter-spacing: 0.3px;
    box-shadow: 0 0 0 rgba(0, 212, 255, 0);
}
.nav-helper:hover {
    border-color: rgba(0, 212, 255, 0.7);
    box-shadow: 0 0 18px rgba(0, 212, 255, 0.35);
}

.nav-user:hover {
    box-shadow: 0 5px 18px rgba(0, 212, 255, 0.5);
}

.nav-user-icon {
    font-size: 0.9rem;
    line-height: 1;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0a0e27 100%);
    color: var(--text-primary);
    padding: 100px 0 60px;
    position: relative;
    text-align: center;
    overflow: hidden;
    min-height: auto;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
    pointer-events: none;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.4; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(123, 47, 247, 0.25) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(60px);
    animation: glowPulse 3s ease-in-out infinite;
    pointer-events: none;
    z-index: 1;
}

@keyframes glowPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.4; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.7; }
}

.hero-carousel {
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-carousel-wrapper {
    overflow: hidden;
    position: relative;
}

.hero-carousel-track {
    display: flex;
    transition: transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    width: 200%;
}

.hero-slide {
    width: 50%;
    flex-shrink: 0;
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 1s cubic-bezier(0.25, 0.46, 0.45, 0.94), 
                transform 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    pointer-events: none;
}

.hero-slide.active {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    width: 100%;
    padding: 0 20px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--primary-color);
    border-radius: 30px;
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    margin-bottom: 20px;
    text-transform: uppercase;
    box-shadow: 0 0 20px var(--glow-primary);
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 18px;
    font-weight: 800;
    line-height: 1.3;
    animation: fadeInUp 1s ease 0.2s both;
    padding: 0 20px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--tech-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease infinite;
    background-size: 200% 200%;
}

.number-icon {
    display: inline-block;
    font-size: 0.9em;
    font-weight: 900;
    margin-left: 6px;
    padding: 4px 10px;
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #000 !important;
    border-radius: 12px;
    box-shadow: 
        0 0 15px rgba(255, 215, 0, 0.6),
        0 0 30px rgba(255, 215, 0, 0.4),
        inset 0 1px 2px rgba(255, 255, 255, 0.3);
    animation: numberPulse 2s ease-in-out infinite;
    vertical-align: middle;
    line-height: 1.2;
    letter-spacing: 1px;
    position: relative;
    overflow: visible;
    z-index: 10;
    -webkit-text-fill-color: #000 !important;
    background-clip: padding-box;
}

.number-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shine 3s infinite;
    z-index: -1;
}

@keyframes shine {
    0% {
        transform: translateX(-100%) translateY(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) translateY(100%) rotate(45deg);
    }
}

@keyframes numberPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 
            0 0 15px rgba(255, 215, 0, 0.6),
            0 0 30px rgba(255, 215, 0, 0.4),
            inset 0 1px 2px rgba(255, 255, 255, 0.3);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 
            0 0 20px rgba(255, 215, 0, 0.8),
            0 0 40px rgba(255, 215, 0, 0.6),
            inset 0 1px 2px rgba(255, 255, 255, 0.3);
    }
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: 28px;
    color: var(--text-secondary);
    animation: fadeInUp 1s ease 0.4s both;
    padding: 0 20px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    animation: fadeInUp 1s ease 0.6s both;
    margin-bottom: 20px;
}

/* Hero轮播中的限时优惠样式 */
.promotion-items {
    display: flex;
    justify-content: center;
    gap: 9px;
    margin-bottom: 18px;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.6s both;
}

.promotion-item {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.82rem;
    background: rgba(21, 25, 50, 0.8);
    backdrop-filter: blur(10px);
    padding: 8px 15px;
    border-radius: 50px;
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--text-primary);
    transition: all 0.3s;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.promotion-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
}

.promotion-icon {
    font-size: 1.1rem;
    filter: drop-shadow(0 0 10px var(--glow-primary));
}

/* Hero轮播指示器 */
.hero-carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 15px;
    position: relative;
    z-index: 3;
}

.hero-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(0, 212, 255, 0.3);
    border: 2px solid rgba(0, 212, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.hero-indicator::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-color);
    opacity: 0;
    transition: opacity 0.3s;
    box-shadow: 0 0 10px var(--primary-color);
}

.hero-indicator.active {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--primary-color);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.5);
}

.hero-indicator.active::before {
    opacity: 1;
}

.hero-indicator:hover {
    transform: scale(1.2);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.6);
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 80px;
    overflow: hidden;
}

.hero-wave svg {
    width: 100%;
    height: 100%;
    display: block;
    color: var(--dark-bg);
}

/* 按钮样式 */
.btn {
    padding: 12px 32px;
    border: none;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn span {
    position: relative;
    z-index: 2;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-primary);
    box-shadow: 0 0 30px var(--glow-primary);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 40px var(--glow-primary), 0 10px 30px rgba(0, 212, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 20px var(--glow-primary);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 0 30px var(--glow-primary);
}

.btn-large {
    padding: 20px 50px;
    font-size: 1.1rem;
}

.btn-full {
    width: 100%;
}

/* 章节标题 */
.section-header {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    margin-bottom: 50px;
    position: relative;
    padding: 30px 0;
    gap: 50px;
    flex-wrap: wrap;
    max-width: 100%;
}

.section-number {
    font-size: 6rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.8;
    line-height: 1;
    position: relative;
    z-index: 1;
    user-select: none;
    letter-spacing: -0.05em;
    white-space: nowrap;
    flex-shrink: 0;
}

.section-title {
    font-size: 3rem;
    text-align: center;
    color: var(--text-primary);
    position: relative;
    z-index: 2;
    font-weight: 700;
    margin-bottom: 0;
    letter-spacing: 2px;
    text-shadow: 
        0 0 20px rgba(0, 212, 255, 0.5),
        0 2px 10px rgba(0, 0, 0, 0.5);
    flex-shrink: 0;
    flex: 0 1 auto;
}

.section-line {
    width: 120px;
    height: 4px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--primary-color) 20%, 
        var(--secondary-color) 50%,
        var(--primary-color) 80%,
        transparent
    );
    box-shadow: 
        0 0 15px var(--primary-color),
        0 0 30px var(--secondary-color);
    border-radius: 2px;
    position: relative;
    z-index: 2;
    animation: lineGlow 2s ease-in-out infinite;
    flex-shrink: 0;
}

@keyframes lineGlow {
    0%, 100% { 
        box-shadow: 
            0 0 15px var(--primary-color),
            0 0 30px var(--secondary-color);
    }
    50% { 
        box-shadow: 
            0 0 25px var(--primary-color),
            0 0 50px var(--secondary-color);
    }
}

/* 核心优势 */
.advantages {
    padding: 60px 0;
    background: var(--dark-bg);
    position: relative;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.advantage-card {
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 25px 15px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.5s;
}

.advantage-card:hover::before {
    left: 100%;
}

.advantage-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.3);
}

.advantage-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 10px var(--glow-primary));
    display: inline-block;
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.advantage-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-weight: 700;
}

.advantage-card p {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.85rem;
}

.worry-free-text {
    color: #FAF0E6 !important;
    text-shadow: 0 0 10px rgba(250, 240, 230, 0.3);
}

/* 点击提示样式 */
.click-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 15px;
    padding: 8px 12px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 20px;
    opacity: 0.7;
    transition: all 0.3s;
}

.advantage-card:hover .click-hint {
    opacity: 1;
    background: rgba(0, 212, 255, 0.12);
    border-color: rgba(0, 212, 255, 0.4);
    transform: translateY(-2px);
}

.hint-icon {
    font-size: 0.9rem;
    animation: hintPulse 2s ease-in-out infinite;
}

.hint-text {
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 500;
    letter-spacing: 0.5px;
}

@keyframes hintPulse {
    0%, 100% {
        transform: translateY(0);
        opacity: 0.8;
    }
    50% {
        transform: translateY(-3px);
        opacity: 1;
    }
}

/* 服务项目 */
.services {
    padding: 60px 0;
    background: linear-gradient(180deg, var(--dark-bg) 0%, #0f1425 100%);
    position: relative;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    align-items: start;
}

.service-card {
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 25px 20px;
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.service-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(123, 47, 247, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s;
}

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

.service-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--secondary-color);
    box-shadow: 0 10px 40px rgba(123, 47, 247, 0.4);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 18px;
    text-align: center;
    filter: drop-shadow(0 0 15px var(--glow-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    height: 60px;
    flex-shrink: 0;
    animation: iconFloat 3s ease-in-out infinite;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    text-align: center;
    font-weight: 700;
    flex-shrink: 0;
}

/* 文字在上的卡片样式 */
.service-card-text-top {
    flex-direction: column;
}

.service-card-text-top .service-icon {
    order: 0;
    margin-top: 0;
    margin-bottom: 18px;
}

.service-card-text-top h3 {
    order: 1;
    margin-top: 0;
}

.service-card-text-top ul {
    order: 2;
    margin-bottom: 0;
}

.service-card-text-top .service-click-hint {
    order: 3;
    margin-top: 15px;
}

.service-card ul {
    list-style: none;
    flex-grow: 1;
}

.service-card ul li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: #E8E8E8;
    transition: all 0.3s;
    font-size: 0.85rem;
    text-shadow: 0 0 10px rgba(232, 232, 232, 0.3);
}

.service-card ul li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 0.8rem;
    transition: all 0.3s;
}

.service-card ul li:hover {
    color: var(--text-primary);
    padding-left: 35px;
}

.service-card ul li:hover::before {
    color: var(--secondary-color);
    transform: translateX(5px);
}


/* 联系我们模态框 */
.contact-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.contact-modal.active {
    display: flex;
    opacity: 1;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.modal-container {
    position: relative;
    z-index: 10001;
    width: 90%;
    max-width: 750px;
    max-height: 85vh;
    overflow-y: auto;
    transform: scale(0.9) translateY(50px);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    margin: auto;
}

.contact-modal.active .modal-container {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
    background: rgba(21, 25, 50, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10002;
    transition: all 0.3s;
    padding: 0;
}

.modal-close:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
    transform: rotate(90deg);
}

.modal-close span {
    position: absolute;
    width: 20px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: all 0.3s;
}

.modal-close span:first-child {
    transform: rotate(45deg);
}

.modal-close span:last-child {
    transform: rotate(-45deg);
}

.modal-content {
    background: linear-gradient(135deg, rgba(10, 14, 39, 0.98) 0%, rgba(21, 25, 50, 0.98) 100%);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    padding: 30px 25px;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.6),
        0 0 100px rgba(0, 212, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(123, 47, 247, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.modal-content > * {
    position: relative;
    z-index: 1;
}

.modal-header {
    text-align: center;
    margin-bottom: 35px;
}

.modal-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--primary-color);
    border-radius: 30px;
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 25px;
    text-transform: uppercase;
    box-shadow: 0 0 20px var(--glow-primary);
}

.modal-title {
    font-size: 2.4rem;
    margin-bottom: 12px;
    font-weight: 800;
}

.modal-subtitle {
    font-size: 1.2rem;
    color: #E8E8E8;
    margin-bottom: 0;
    text-shadow: 0 0 10px rgba(232, 232, 232, 0.5);
}

/* 售后保障详细信息样式 */
.service-detail-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 30px;
}

.service-detail-item {
    display: flex;
    gap: 20px;
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: 15px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.3s;
    align-items: flex-start;
    position: relative;
    overflow: hidden;
}

.service-detail-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s;
}

.service-detail-item:hover::before {
    opacity: 1;
}

.service-detail-item:hover {
    transform: translateX(5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
    background: rgba(21, 25, 50, 0.8);
}

.detail-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
    min-width: 50px;
    text-align: center;
    opacity: 0.9;
    position: relative;
    text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.2));
}

.detail-number::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    opacity: 0.8;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

/* 图标样式 */
.detail-icon-number {
    font-size: 3rem;
    line-height: 1;
    flex-shrink: 0;
    min-width: 60px;
    text-align: center;
    position: relative;
    filter: drop-shadow(0 0 15px rgba(0, 212, 255, 0.4));
    animation: iconFloat 3s ease-in-out infinite;
    display: flex;
    align-items: center;
    justify-content: center;
}

.detail-icon-number::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: iconGlow 3s ease-in-out infinite;
}

@keyframes iconGlow {
    0%, 100% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.detail-content {
    flex: 1;
}

.detail-title {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.4;
    position: relative;
    padding-left: 12px;
}

.detail-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 70%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.detail-description {
    color: #E8E8E8;
    line-height: 1.8;
    font-size: 0.9rem;
    text-align: justify;
    text-shadow: 0 0 10px rgba(232, 232, 232, 0.3);
}

.highlight-item {
    position: relative;
}

.highlight-item::after {
    content: '';
    position: absolute;
    top: -2px;
    right: -2px;
    width: 100%;
    height: 100%;
    border-radius: 20px;
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.1) 0%, 
        rgba(123, 47, 247, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: -1;
}

.highlight-item:hover::after {
    opacity: 1;
}

/* 精准专业详细信息样式 */
.precision-detail-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 30px;
}

.detail-item {
    display: flex;
    gap: 20px;
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: 15px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.3s;
    align-items: flex-start;
}

.detail-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.detail-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 0 15px var(--glow-primary));
    flex-shrink: 0;
    animation: iconFloat 3s ease-in-out infinite;
}

.detail-text {
    flex: 1;
}

.detail-text h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.detail-text p {
    color: #E8E8E8;
    line-height: 1.7;
    font-size: 0.9rem;
    text-shadow: 0 0 10px rgba(232, 232, 232, 0.3);
}

/* 团队成员照片内联样式 */
.team-photo-inline {
    margin-top: 25px;
    display: flex;
    justify-content: center;
    padding: 20px;
    background: rgba(10, 14, 39, 0.4);
    border-radius: 15px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.3s;
}

.service-detail-item:hover .team-photo-inline {
    border-color: rgba(0, 212, 255, 0.4);
    background: rgba(10, 14, 39, 0.6);
}

.team-photo-inline .team-photo {
    max-width: 100%;
    max-height: 500px;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s;
    cursor: pointer;
}

.team-photo-inline:hover .team-photo {
    transform: scale(1.02);
}

/* 团队成员照片样式 */
.team-photo-section {
    margin: 30px 0;
    display: flex;
    justify-content: center;
}

.team-photo-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 20px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.3s;
    max-width: 100%;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.team-photo-wrapper:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
    transform: translateY(-5px);
}

.team-photo {
    max-width: 100%;
    max-height: 600px;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s;
    cursor: pointer;
}

.team-photo-wrapper:hover .team-photo {
    transform: scale(1.02);
}

/* 论文展示样式 */
.paper-showcase {
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: 15px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.3s;
}

.paper-showcase:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.paper-showcase-layout {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: flex-start;
}

.paper-images {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    width: 100%;
    margin-top: 10px;
}

.showcase-header-left {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    width: 100%;
    padding: 20px;
    background: rgba(10, 14, 39, 0.4);
    border-radius: 15px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    text-align: center;
}

.showcase-header-left .detail-icon {
    font-size: 3rem;
    filter: drop-shadow(0 0 15px var(--glow-primary));
    animation: iconFloat 3s ease-in-out infinite;
}

.showcase-title {
    font-size: 1.2rem;
    color: var(--text-primary);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    text-align: center;
}

.showcase-header-right {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    min-width: 200px;
    padding: 20px;
    background: rgba(10, 14, 39, 0.4);
    border-radius: 15px;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.showcase-header-right .detail-icon {
    font-size: 3rem;
    filter: drop-shadow(0 0 15px var(--glow-primary));
    animation: iconFloat 3s ease-in-out infinite;
    line-height: 1.4;
}

.paper-image-wrapper {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    min-height: 400px;
    background: rgba(10, 14, 39, 0.8);
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.3s;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.paper-image-wrapper:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
}

.paper-image-wrapper:hover .image-overlay {
    opacity: 1;
}

.paper-image {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
    transition: transform 0.3s;
}

.paper-image-wrapper:hover .paper-image {
    transform: scale(1.05);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.8) 0%, 
        rgba(123, 47, 247, 0.8) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.view-text {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 600;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    letter-spacing: 2px;
}

/* 全流程服务样式 */
.full-service-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 30px;
}

/* 核心成果高亮框 */
.service-highlight-box {
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.15) 0%, 
        rgba(123, 47, 247, 0.15) 100%);
    border: 2px solid rgba(0, 212, 255, 0.4);
    border-radius: 15px;
    padding: 20px;
    display: flex;
    gap: 20px;
    align-items: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.2);
}

.service-highlight-box::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    animation: rotateGlow 8s linear infinite;
}

@keyframes rotateGlow {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.highlight-icon {
    font-size: 3rem;
    filter: drop-shadow(0 0 20px rgba(255, 215, 0, 0.6));
    animation: iconFloat 3s ease-in-out infinite;
    flex-shrink: 0;
    z-index: 1;
}

.highlight-content {
    flex: 1;
    z-index: 1;
}

.highlight-title {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 700;
    background: linear-gradient(135deg, #FFD700, #FFA500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

.highlight-text {
    color: #E8E8E8;
    line-height: 1.8;
    font-size: 0.95rem;
    text-shadow: 0 0 10px rgba(232, 232, 232, 0.3);
}

/* 其余部分样式 */
.service-section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.section-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 15px var(--glow-primary));
    animation: iconFloat 3s ease-in-out infinite;
}

.section-title {
    font-size: 1.4rem;
    color: var(--text-primary);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.service-items-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 25px;
}

.service-item {
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 15px;
    border-radius: 12px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s;
}

.service-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
    background: rgba(21, 25, 50, 0.8);
}

.item-number {
    width: 35px;
    height: 35px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.5);
}

.item-text {
    color: #E8E8E8;
    font-size: 0.9rem;
    font-weight: 500;
    flex: 1;
}

.highlight-service-item {
    grid-column: span 1;
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.1) 0%, 
        rgba(123, 47, 247, 0.1) 100%);
    border: 2px solid rgba(0, 212, 255, 0.4);
}

.highlight-service-item .item-number {
    background: linear-gradient(135deg, #FFD700, #FFA500);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.6);
}

.highlight-service-item .item-text {
    font-size: 0.95rem;
    font-weight: 700;
    background: linear-gradient(135deg, #FFD700, #FFA500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.service-note {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 15px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    border-left: 3px solid var(--primary-color);
}

.note-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.note-text {
    color: #E8E8E8;
    font-size: 0.85rem;
    line-height: 1.5;
}

/* 工科类特殊服务 */
.service-special-box {
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(123, 47, 247, 0.4);
    border-radius: 15px;
    padding: 20px;
    display: flex;
    gap: 20px;
    align-items: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(123, 47, 247, 0.2);
}

.service-special-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.6);
}

.special-icon {
    font-size: 3rem;
    filter: drop-shadow(0 0 20px rgba(123, 47, 247, 0.6));
    animation: iconFloat 3s ease-in-out infinite;
    flex-shrink: 0;
    z-index: 1;
}

.special-content {
    flex: 1;
    z-index: 1;
}

.special-title {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.special-text {
    color: #E8E8E8;
    line-height: 1.8;
    font-size: 0.95rem;
    text-shadow: 0 0 10px rgba(232, 232, 232, 0.3);
}

/* 软硬件开发设计分类选择样式 */
.hardware-categories-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.hardware-category-item {
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 30px 25px;
    border-radius: 20px;
    border: 2px solid rgba(0, 212, 255, 0.2);
    transition: all 0.3s;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    position: relative;
    overflow: hidden;
}

.hardware-category-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.5s;
}

.hardware-category-item:hover::before {
    left: 100%;
}

.hardware-category-item:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.4);
    background: rgba(21, 25, 50, 0.8);
}

.category-icon {
    font-size: 4rem;
    filter: drop-shadow(0 0 20px var(--glow-primary));
    animation: iconFloat 3s ease-in-out infinite;
    z-index: 1;
}

.category-title {
    font-size: 1.3rem;
    color: #E8E8E8;
    font-weight: 600;
    margin: 0;
    text-shadow: 0 0 10px rgba(232, 232, 232, 0.3);
    z-index: 1;
    line-height: 1.4;
}

.category-hint {
    font-size: 0.85rem;
    color: var(--primary-color);
    margin: 0;
    opacity: 0.7;
    transition: opacity 0.3s;
    z-index: 1;
}

.hardware-category-item:hover .category-hint {
    opacity: 1;
}

.service-click-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 15px;
    padding: 8px 12px;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 20px;
    opacity: 0.7;
    transition: all 0.3s;
}

.service-card:hover .service-click-hint {
    opacity: 1;
    background: rgba(0, 212, 255, 0.12);
    border-color: rgba(0, 212, 255, 0.4);
    transform: translateY(-2px);
}

/* 图片轮播样式 */
.carousel-content {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 25px;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    min-height: min-content;
    padding: 20px;
    box-sizing: border-box;
    max-height: 85vh;
    overflow-y: auto;
    overflow-x: hidden;
}

/* 轮播内容滚动条样式 */
.carousel-content::-webkit-scrollbar {
    width: 8px;
}

.carousel-content::-webkit-scrollbar-track {
    background: rgba(21, 25, 50, 0.5);
    border-radius: 10px;
}

.carousel-content::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.6) 0%, rgba(123, 47, 247, 0.6) 100%);
    border-radius: 10px;
    border: 2px solid rgba(10, 14, 39, 0.5);
}

.carousel-content::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.8) 0%, rgba(123, 47, 247, 0.8) 100%);
}

/* 图片查看容器滚动条样式 */
.image-view-container::-webkit-scrollbar {
    width: 8px;
}

.image-view-container::-webkit-scrollbar-track {
    background: rgba(21, 25, 50, 0.5);
    border-radius: 10px;
}

.image-view-container::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.6) 0%, rgba(123, 47, 247, 0.6) 100%);
    border-radius: 10px;
    border: 2px solid rgba(10, 14, 39, 0.5);
}

.image-view-container::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.8) 0%, rgba(123, 47, 247, 0.8) 100%);
}

.carousel-main {
    order: 1;
}

.carousel-icon-top {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    order: 0;
}

.carousel-icon-top .carousel-icon {
    font-size: 3.5rem;
    filter: drop-shadow(0 0 20px var(--glow-primary));
    animation: iconFloat 3s ease-in-out infinite;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--tech-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.carousel-icon-top .carousel-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    text-shadow: 0 0 15px rgba(0, 212, 255, 0.5);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--tech-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.carousel-category-selector {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
    order: 2;
    margin-top: 20px;
}

.category-selector-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px 20px;
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(0, 212, 255, 0.2);
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s;
    min-width: 100px;
}

.category-selector-item:hover {
    transform: translateY(-3px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.3);
    background: rgba(21, 25, 50, 0.8);
}

.category-selector-item.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, 
        rgba(0, 212, 255, 0.15) 0%, 
        rgba(123, 47, 247, 0.15) 100%);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}

.selector-icon {
    font-size: 1.6rem;
    filter: drop-shadow(0 0 10px var(--glow-primary));
}

.selector-text {
    font-size: 0.85rem;
    color: #E8E8E8;
    font-weight: 500;
    text-shadow: 0 0 10px rgba(232, 232, 232, 0.3);
}

.category-selector-item.active .selector-text {
    color: #E8E8E8;
    font-weight: 600;
    text-shadow: 0 0 15px rgba(232, 232, 232, 0.5);
}

/* 子分类选择器样式 */
.sub-category-selector {
    display: flex;
    gap: 15px;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    order: 2;
}

.sub-category-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px 25px;
    background: rgba(0, 0, 0, 0.4);
    border: 2px solid rgba(0, 212, 255, 0.3);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 120px;
}

.sub-category-item:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.6);
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0, 212, 255, 0.3);
}

.sub-category-item.active {
    background: rgba(0, 212, 255, 0.15);
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}

.sub-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 5px rgba(232, 232, 232, 0.5));
}

.sub-text {
    font-size: 0.85rem;
    color: #E8E8E8;
    font-weight: 500;
    text-shadow: 0 0 10px rgba(232, 232, 232, 0.3);
}

.sub-category-item.active .sub-text {
    color: #E8E8E8;
    font-weight: 600;
    text-shadow: 0 0 15px rgba(232, 232, 232, 0.5);
}

.carousel-main {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 20px;
    width: 100%;
    min-height: min-content;
}

.carousel-arrow {
    width: 60px;
    height: 60px;
    background: rgba(21, 25, 50, 0.9);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(0, 212, 255, 0.4);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 2.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    z-index: 10;
    flex-shrink: 0;
}

.carousel-arrow:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--primary-color);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
    transform: scale(1.1);
}

.carousel-arrow:active {
    transform: scale(0.95);
}

.carousel-image-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    max-width: 700px;
    width: 100%;
    position: relative;
    padding: 0;
    overflow: visible;
}

.carousel-image {
    max-width: 100%;
    max-height: 70vh;
    width: auto;
    height: auto;
    object-fit: contain;
    image-rendering: auto;
    -ms-interpolation-mode: bicubic;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    background: rgba(10, 14, 39, 0.6);
    padding: 0;
    margin: 0;
    padding: 20px;
}

.carousel-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 12px 25px;
    background: rgba(21, 25, 50, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 25px;
}

.carousel-info-top {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    box-shadow: 0 5px 20px rgba(0, 212, 255, 0.4);
    animation: floatUp 0.5s ease-out;
}

@keyframes floatUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.carousel-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 0 8px var(--glow-primary));
    animation: iconPulse 2s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 0 8px var(--glow-primary));
    }
    50% {
        transform: scale(1.1);
        filter: drop-shadow(0 0 15px var(--glow-primary));
    }
}

.carousel-category {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 1px;
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.carousel-index {
    color: #E8E8E8;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 图片查看模态框样式 */
.image-view-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 20000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.image-view-modal.active {
    display: flex;
    opacity: 1;
}

.image-view-container {
    position: relative;
    z-index: 20001;
    width: 90%;
    max-width: 1200px;
    max-height: 90vh;
    transform: scale(0.9) translateY(50px);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    overflow-x: hidden;
}

.image-view-modal.active .image-view-container {
    transform: scale(1) translateY(0);
}

.image-view-content {
    background: linear-gradient(135deg, rgba(10, 14, 39, 0.98) 0%, rgba(21, 25, 50, 0.98) 100%);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 25px;
    padding: 10px;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.6),
        0 0 100px rgba(0, 212, 255, 0.3);
    position: relative;
    overflow: visible;
    display: flex;
    align-items: center;
    justify-content: center;
    max-height: 90vh;
}

/* 自定义滚动条样式 */
.image-view-content::-webkit-scrollbar {
    width: 10px;
}

.image-view-content::-webkit-scrollbar-track {
    background: rgba(21, 25, 50, 0.5);
    border-radius: 10px;
}

.image-view-content::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.6) 0%, rgba(123, 47, 247, 0.6) 100%);
    border-radius: 10px;
    border: 2px solid rgba(10, 14, 39, 0.5);
}

.image-view-content::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.8) 0%, rgba(123, 47, 247, 0.8) 100%);
}

.image-view-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(123, 47, 247, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.view-image {
    max-width: 100%;
    max-height: 85vh;
    width: auto;
    height: auto;
    object-fit: contain;
    display: block;
    border-radius: 15px;
    position: relative;
    z-index: 1;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.image-view-modal .modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 45px;
    height: 45px;
    background: rgba(21, 25, 50, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20002;
    transition: all 0.3s;
    padding: 0;
}

.image-view-modal .modal-close:hover {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
    transform: rotate(90deg);
}

.image-view-modal .modal-close span {
    position: absolute;
    width: 20px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: all 0.3s;
}

.image-view-modal .modal-close span:first-child {
    transform: rotate(45deg);
}

.image-view-modal .modal-close span:last-child {
    transform: rotate(-45deg);
}

/* 联系我们二维码样式 */
.contact-qr-content {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: nowrap;
    margin-top: 40px;
}

.qr-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 25px;
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.3s;
    flex: 1;
    max-width: 350px;
}

.qr-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.qr-info {
    text-align: center;
}

.qr-label {
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.qr-name {
    font-size: 1rem;
    color: var(--text-secondary);
}

.qr-code-wrapper {
    width: 100%;
    max-width: 280px;
    aspect-ratio: 1;
    background: var(--white);
    border-radius: 15px;
    padding: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    transition: all 0.3s;
}

.qr-item:hover .qr-code-wrapper {
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.4);
}

.qr-code {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 10px;
}

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

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

.contact-item {
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 35px;
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    text-align: center;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
        width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.3s;
}

.contact-item:hover::before {
    transform: scaleX(1);
}

.contact-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 15px var(--glow-primary));
}

.contact-item h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 700;
}

.contact-item p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.contact-form {
    background: rgba(21, 25, 50, 0.6);
    backdrop-filter: blur(10px);
    padding: 45px;
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.contact-form h3 {
    font-size: 2rem;
    margin-bottom: 35px;
    color: var(--text-primary);
    text-align: center;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 18px 20px;
    background: rgba(10, 14, 39, 0.6);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-primary);
    transition: all 0.3s;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    background: rgba(10, 14, 39, 0.8);
}

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

/* 页脚 */
.footer {
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(20px);
    color: var(--text-secondary);
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid rgba(0, 212, 255, 0.2);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--primary-color), 
        var(--secondary-color), 
        var(--primary-color), 
        transparent
    );
}

.footer p {
    font-size: 1rem;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 968px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(10, 14, 39, 0.98);
        backdrop-filter: blur(30px);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: 100px 30px 30px;
        gap: 0;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.5);
        border-left: 1px solid rgba(0, 212, 255, 0.2);
        z-index: 999;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-link {
        width: 100%;
        padding: 18px 20px;
        margin-bottom: 10px;
        border-radius: 12px;
        border: 1px solid rgba(0, 212, 255, 0.1);
    }

    .nav-link-indicator {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .navbar .container {
        position: relative;
    }

    /* 让实习帮助 与 登录胶囊 在移动端居中且不贴边 */
    .nav-helper,
    .nav-user {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
    }
    .nav-helper {
        left: 50%;
        transform: translate(calc(-100% - 8px), -50%);
        margin-left: 0;
    }
    .nav-user {
        right: 50%;
        transform: translate(calc(100% + 8px), -50%);
        margin-left: 0;
    }

    .section-header {
        padding: 30px 0;
        min-height: auto;
        gap: 25px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .section-number {
        font-size: 4rem;
        opacity: 0.7;
    }

    .section-title {
        font-size: 2.2rem;
        letter-spacing: 1px;
        padding: 0;
        text-align: center;
    }

    .section-line {
        width: 80px;
        height: 3px;
        margin-left: auto;
    }
}

@media (max-width: 768px) {
    .navbar .container {
        padding: 15px 20px;
    }

    .logo {
        width: 55px;
        height: 55px;
    }

    .logo-text {
        font-size: 1.3rem;
    }

    .hero {
        padding: 100px 0 80px;
    }

    .hero-title {
        font-size: 2.2rem;
        line-height: 1.3;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        padding: 0 20px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
        width: 100%;
        padding: 0 20px;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .section-header {
        padding: 25px 0;
        min-height: auto;
        margin-bottom: 50px;
        gap: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .section-number {
        font-size: 3.5rem;
        opacity: 0.7;
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 0;
        padding: 0;
        text-align: center;
    }

    .advantages {
        padding: 50px 0;
    }

    .services {
        padding: 50px 0;
    }

    .advantages-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .advantage-card {
        padding: 25px 15px;
    }

    .service-card {
        padding: 25px 20px;
    }

    .service-icon {
        font-size: 2rem;
        margin-bottom: 15px;
    }

    .service-card h3 {
        font-size: 1.1rem;
        margin-bottom: 12px;
    }

    .service-card ul li {
        padding: 6px 0;
        padding-left: 22px;
        font-size: 0.8rem;
    }


    .modal-container {
        max-height: 95vh;
        padding: 0 15px;
    }

    .modal-content {
        padding: 40px 25px;
        border-radius: 20px;
    }

    .modal-title {
        font-size: 2.2rem;
    }

    .modal-subtitle {
        font-size: 1.1rem;
    }

    .contact-qr-content {
        flex-wrap: wrap;
        gap: 20px;
    }

    .qr-item {
        min-width: auto;
        flex: 1 1 calc(50% - 10px);
        max-width: 100%;
    }

    .qr-code-wrapper {
        width: 280px;
        height: 280px;
        padding: 18px;
    }

    .modal-close {
        top: 15px;
        right: 15px;
        width: 40px;
        height: 40px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .promotion-items {
        flex-direction: column;
        gap: 8px;
        margin-bottom: 16px;
    }

    .promotion-item {
        padding: 7px 14px;
        font-size: 0.78rem;
    }

    .promotion-icon {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        padding: 12px 15px;
    }

    .logo {
        width: 50px;
        height: 50px;
        padding: 5px;
    }

    .logo-text {
        font-size: 1.1rem;
        letter-spacing: 0.5px;
    }

    .nav-links {
        width: 100%;
        right: -100%;
    }

    .hero {
        padding: 80px 0 60px;
    }

    .hero-badge {
        font-size: 0.75rem;
        padding: 6px 16px;
    }

    .hero-title {
        font-size: 1.8rem;
        padding: 0 15px;
    }

    .hero-subtitle {
        font-size: 1rem;
        padding: 0 15px;
    }

    .section-header {
        padding: 20px 0;
        min-height: auto;
        margin-bottom: 40px;
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .section-number {
        font-size: 2.8rem;
        opacity: 0.7;
    }

    .section-title {
        font-size: 1.6rem;
        letter-spacing: 0.5px;
        padding: 0;
        text-align: center;
    }

    .section-line {
        width: 60px;
        height: 2px;
    }

    .advantage-card {
        padding: 25px 20px;
        border-radius: 15px;
    }

    .service-card {
        padding: 22px 18px;
        border-radius: 15px;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .advantage-icon {
        font-size: 2rem;
        margin-bottom: 15px;
    }

    .advantage-card h3 {
        font-size: 1.1rem;
    }

    .advantage-card p {
        font-size: 0.8rem;
    }

    .click-hint {
        margin-top: 12px;
        padding: 6px 10px;
        gap: 5px;
    }

    .hint-icon {
        font-size: 0.8rem;
    }

    .hint-text {
        font-size: 0.7rem;
    }

    .service-icon {
        font-size: 1.8rem;
        margin-bottom: 12px;
    }

    .service-card h3 {
        font-size: 1rem;
        margin-bottom: 10px;
    }

    .service-card ul li {
        padding: 5px 0;
        padding-left: 20px;
        font-size: 0.75rem;
    }

    .service-card h3 {
        font-size: 1.4rem;
    }

    .modal-container {
        padding: 0 10px;
    }

    .modal-content {
        padding: 30px 20px;
    }

    .modal-title {
        font-size: 1.8rem;
    }

    .modal-subtitle {
        font-size: 1rem;
    }

    .contact-qr-content {
        gap: 25px;
    }

    .qr-item {
        padding: 25px 20px;
    }

    .qr-code-wrapper {
        width: 260px;
        height: 260px;
        padding: 15px;
    }

    .qr-label {
        font-size: 1.1rem;
    }

    .modal-close {
        top: 10px;
        right: 10px;
        width: 35px;
        height: 35px;
    }

    .form-group input,
    .form-group textarea {
        padding: 15px 18px;
        font-size: 0.95rem;
    }

    .hero-title {
        font-size: 1.8rem;
    }

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

    .promotion-item {
        padding: 7px 14px;
        font-size: 0.76rem;
    }

    .promotion-icon {
        font-size: 0.95rem;
    }

    .btn {
        padding: 14px 30px;
        font-size: 0.95rem;
    }

    .btn-large {
        padding: 16px 40px;
    }

    .carousel-category-selector {
        gap: 10px;
    }

    .category-selector-item {
        padding: 12px 15px;
        min-width: 80px;
    }

    .selector-icon {
        font-size: 1.5rem;
    }

    .selector-text {
        font-size: 0.75rem;
    }

    /* 保持轮播箭头在左右，不改为上下 */
    .carousel-main {
        flex-direction: row;
        gap: 10px;
        align-items: center;
    }
    
    .carousel-arrow {
        width: 45px;
        height: 45px;
        font-size: 1.8rem;
        flex-shrink: 0;
    }
    
    .carousel-image-wrapper {
        flex: 1;
        min-width: 0;
    }

    .detail-item {
        flex-direction: column;
        gap: 20px;
        padding: 25px 20px;
    }

    .detail-icon {
        font-size: 2.5rem;
    }

    .detail-text h3 {
        font-size: 1.2rem;
        margin-bottom: 12px;
    }

    .detail-text p {
        font-size: 0.9rem;
    }

    .service-detail-content {
        gap: 20px;
        margin-top: 30px;
    }

    .service-detail-item {
        flex-direction: column;
        gap: 20px;
        padding: 25px 20px;
    }

    .detail-number {
        font-size: 2.5rem;
        min-width: auto;
        width: 100%;
        text-align: left;
    }

    .detail-number::after {
        left: 0;
        transform: none;
    }

    .detail-icon-number {
        font-size: 3rem;
        min-width: 60px;
    }

    .detail-icon-number::before {
        width: 70px;
        height: 70px;
    }

    .carousel-content {
        flex-direction: column;
        gap: 15px;
        padding: 10px;
    }
    
    /* 确保轮播箭头在移动端保持在左右 */
    .carousel-main {
        flex-direction: row !important;
        align-items: center;
        gap: 8px;
    }
    
    .carousel-arrow {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
        flex-shrink: 0;
        position: relative;
        z-index: 10;
    }
    
    .carousel-image-wrapper {
        flex: 1;
        min-width: 0;
        max-width: calc(100% - 100px);
    }
    
    .carousel-image {
        max-width: 100%;
        max-height: 65vh;
        width: auto;
        height: auto;
        padding: 0;
        margin: 0;
    }
    
    .carousel-icon-top {
        margin-bottom: 10px;
    }
    
    .carousel-icon-top .carousel-icon {
        font-size: 2.5rem;
    }
    
    /* 分类选择器在移动端优化 */
    .carousel-category-selector {
        gap: 8px;
        padding: 10px;
    }
    
    .category-selector-item {
        padding: 10px 12px;
        min-width: 70px;
    }
    
    .selector-icon {
        font-size: 1.2rem;
    }
    
    .selector-text {
        font-size: 0.7rem;
    }
    
    /* 子分类选择器优化 */
    .sub-category-selector {
        gap: 8px;
        padding: 10px;
    }
    
    .sub-category-item {
        padding: 10px 15px;
        min-width: 80px;
    }

    .sub-category-selector {
        flex-direction: column;
        gap: 10px;
        padding: 12px;
    }

    .sub-category-item {
        padding: 12px 20px;
        min-width: 100px;
    }

    .sub-icon {
        font-size: 1.5rem;
    }

    .sub-text {
        font-size: 0.75rem;
    }

    .carousel-arrow {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
        flex-shrink: 0;
    }
    
    .carousel-main {
        gap: 8px;
    }

    .carousel-image {
        max-width: 100%;
        max-height: 65vh;
        padding: 0;
        margin: 0;
    }
    
    .carousel-image-wrapper {
        flex: 1;
        min-width: 0;
    }
    
    .carousel-icon-top {
        margin-bottom: 15px;
    }
    
    .carousel-icon-top .carousel-icon {
        font-size: 2.5rem;
    }

    .carousel-info {
        padding: 10px 20px;
        flex-direction: column;
        gap: 8px;
    }

    .hardware-categories-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .hardware-category-item {
        padding: 25px 20px;
    }

    .category-icon {
        font-size: 3rem;
    }

    .category-title {
        font-size: 1.1rem;
    }

    .service-highlight-box {
        flex-direction: column;
        padding: 25px 20px;
    }

    .highlight-icon {
        font-size: 3rem;
    }

    .highlight-title {
        font-size: 1.5rem;
    }

    .highlight-text {
        font-size: 1rem;
    }

    .service-items-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .highlight-service-item {
        grid-column: span 1;
    }

    .service-special-box {
        flex-direction: column;
        padding: 25px 20px;
    }

    .special-icon {
        font-size: 3rem;
    }

    .special-title {
        font-size: 1.5rem;
    }

    .special-text {
        font-size: 1rem;
    }

    .detail-title {
        font-size: 1.2rem;
        margin-bottom: 12px;
        padding-left: 12px;
    }

    .detail-title::before {
        width: 3px;
    }

    .detail-description {
        font-size: 0.9rem;
        line-height: 1.8;
    }

    .team-photo-wrapper {
        padding: 15px;
    }

    .team-photo {
        max-height: 300px;
    }

    .team-photo-inline {
        margin-top: 20px;
        padding: 15px;
    }

    .team-photo-inline .team-photo {
        max-height: 350px;
    }

    .paper-showcase {
        padding: 25px 20px;
    }

    .paper-showcase-layout {
        flex-direction: column;
        gap: 20px;
    }

    .showcase-header-left {
        min-width: auto;
        width: 100%;
        padding: 15px;
    }

    .showcase-header-left .detail-icon {
        font-size: 2.5rem;
    }
    
    .showcase-header-right {
        min-width: auto;
        width: 100%;
        padding: 15px;
    }

    .showcase-header-right .detail-icon {
        font-size: 2.5rem;
    }

    .showcase-title {
        font-size: 1.2rem;
    }

    .paper-images {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .paper-image-wrapper {
        min-height: 300px;
    }

    .view-text {
        font-size: 1rem;
    }

    .image-view-container {
        width: 95%;
        max-height: 95vh;
    }

    .image-view-content {
        padding: 15px;
        max-height: 95vh;
        overflow-y: auto;
        overflow-x: hidden;
    }

    .view-image {
        max-height: 90vh;
        padding: 0;
        margin: 0;
    }
    
    .image-view-content {
        padding: 5px;
        overflow: visible;
    }

    .image-view-modal .modal-close {
        top: 5px;
        right: 5px;
        width: 40px;
        height: 40px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .nav-link:hover::before {
        opacity: 0;
    }

    .nav-link:active::before {
        opacity: 1;
    }
    
    /* 触摸设备上增大点击区域 */
    .carousel-arrow {
        min-width: 44px;
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .category-selector-item,
    .sub-category-item {
        min-height: 44px;
        touch-action: manipulation;
    }
    
    /* 移除hover效果，使用active */
    .carousel-arrow:hover {
        transform: none;
    }
    
    .carousel-arrow:active {
        transform: scale(0.9);
        background: rgba(0, 212, 255, 0.3);
    }

    .advantage-card:active,
    .service-card:active {
        transform: scale(0.98);
    }
}

/* =========================================================
   白蓝简约高级主题 —— 覆盖层
   底色纯白 + 品牌蓝，金色作点缀，弱化霓虹光效，靠留白与阴影质感
   ========================================================= */

body {
    background: var(--page-bg);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: rgba(31, 95, 224, 0.15);
    color: var(--primary-deep);
}

/* ---------- 背景装饰：网格淡化、光斑改为淡蓝 ---------- */
.tech-bg {
    background:
        radial-gradient(900px 500px at 78% -10%, #eef5ff 0%, transparent 65%),
        radial-gradient(700px 420px at 8% 12%, #f3f8ff 0%, transparent 60%),
        #ffffff;
}

.grid-overlay {
    background-image:
        linear-gradient(rgba(31, 95, 224, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(31, 95, 224, 0.055) 1px, transparent 1px);
    opacity: 0.55;
}

.particle {
    background: #9dc0f7;
    box-shadow: 0 0 6px rgba(31, 95, 224, 0.35);
    opacity: 0.6;
}

/* ---------- 导航栏 ---------- */
.navbar {
    background: rgba(255, 255, 255, 0.82);
    border-bottom: 1px solid var(--line-soft);
    box-shadow: none;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 6px 24px rgba(15, 40, 90, 0.06);
}

.navbar-bg {
    display: none;
}

.navbar::before {
    background: linear-gradient(90deg, transparent, #c9dcfb, #9dc0f7, #c9dcfb, transparent);
    opacity: 0.9;
    animation: none;
}

.logo {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    box-shadow: 0 6px 18px rgba(31, 95, 224, 0.10);
    padding: 4px;
    border-radius: 16px;
}

.logo:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(31, 95, 224, 0.18);
}

.logo-glow {
    display: none;
}

.logo-text {
    background: none;
    -webkit-text-fill-color: var(--primary-deep);
    color: var(--primary-deep);
}

.nav-link {
    color: #38475e;
    text-shadow: none;
    font-weight: 500;
    border-radius: 10px;
}

.nav-link::before {
    background: var(--primary-light);
    border-radius: 10px;
}

.nav-link:hover {
    color: var(--primary-deep);
    text-shadow: none;
}

.nav-link-icon {
    filter: none;
    display: inline-flex;
    align-items: center;
}

.nav-link-icon svg {
    width: 17px;
    height: 17px;
    display: block;
    stroke: currentColor;
}

.nav-user-icon svg {
    width: 15px;
    height: 15px;
    display: block;
    stroke: currentColor;
}

.nav-user-icon {
    display: inline-flex;
    align-items: center;
}

.nav-helper .nav-ico {
    width: 15px;
    height: 15px;
    display: block;
    stroke: currentColor;
}

.nav-link-indicator {
    height: 2px;
    background: var(--primary-color);
    box-shadow: none;
}

.nav-user {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(31, 95, 224, 0.22);
}

.nav-user:hover {
    background: var(--primary-deep);
    box-shadow: 0 8px 20px rgba(31, 95, 224, 0.28);
}

.nav-helper {
    color: var(--primary-deep);
    background: #ffffff;
    border: 1px solid #d8e5fb;
    box-shadow: none;
}

.nav-helper:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    box-shadow: none;
}

.mobile-menu-btn span {
    background: #2b3a52;
    box-shadow: none;
}

/* ---------- 首屏 ---------- */
.hero {
    background:
        radial-gradient(1100px 560px at 50% -20%, #e4efff 0%, rgba(255, 255, 255, 0) 72%),
        linear-gradient(180deg, #f6faff 0%, #fbfdff 60%, #ffffff 100%);
    color: var(--text-primary);
}

.hero::before {
    background: radial-gradient(circle, rgba(31, 95, 224, 0.07) 0%, transparent 70%);
    animation: none;
    opacity: 1;
}

.hero-glow {
    background: radial-gradient(circle, rgba(31, 95, 224, 0.10) 0%, transparent 70%);
    animation: none;
    filter: blur(70px);
    opacity: 0.9;
}

.hero-wave {
    display: none;
}

.hero-badge {
    background: #ffffff;
    border: 1px solid #d8e5fb;
    color: var(--primary-color);
    box-shadow: 0 2px 10px rgba(31, 95, 224, 0.06);
    letter-spacing: 2px;
}

.hero-title {
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.gradient-text {
    background: linear-gradient(120deg, #1546ab 0%, #2f74ea 55%, #4f93f7 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: none;
    background-size: auto;
}

.hero-subtitle {
    color: var(--text-secondary);
}

.number-icon,
.gradient-text .number-icon {
    background: linear-gradient(135deg, #f7cf7a, #e8a33d);
    color: #4a3313 !important;
    -webkit-text-fill-color: #4a3313 !important;
    box-shadow: 0 6px 16px rgba(232, 163, 61, 0.28);
    animation: none;
    border-radius: 10px;
}

.number-icon::before {
    display: none;
}

.promotion-item {
    background: #f2f7ff;
    border: 1px solid #e2ebfa;
    color: var(--text-secondary);
    box-shadow: 0 2px 10px rgba(15, 40, 90, 0.04);
    backdrop-filter: none;
}

.promotion-item:hover {
    border-color: #bcd4f8;
    box-shadow: 0 10px 24px rgba(31, 95, 224, 0.10);
}

.promotion-icon {
    filter: none;
}

.hero-indicator {
    background: #dfe8f6;
    border: 1px solid #cfdcf0;
}

.hero-indicator::before {
    box-shadow: none;
}

.hero-indicator.active {
    background: var(--primary-light);
    border-color: var(--primary-color);
    box-shadow: none;
}

.hero-indicator:hover {
    box-shadow: none;
}

/* ---------- 按钮 ---------- */
.btn {
    border-radius: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, #2f74ea, #1f5fe0);
    color: #fff;
    box-shadow: 0 8px 20px rgba(31, 95, 224, 0.22);
}

.btn-primary::before {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.22), transparent);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(31, 95, 224, 0.28);
}

.btn-secondary {
    background: #ffffff;
    color: var(--primary-deep);
    border: 1px solid #cfdcf0;
    box-shadow: 0 2px 8px rgba(15, 40, 90, 0.04);
}

.btn-secondary:hover {
    background: var(--primary-light);
    border-color: #b7cff5;
    box-shadow: 0 10px 24px rgba(31, 95, 224, 0.10);
    transform: translateY(-2px);
}

/* ---------- 章节标题 ---------- */
.section-number {
    background: none;
    -webkit-text-fill-color: #dfe9fa;
    color: #dfe9fa;
    opacity: 1;
    font-weight: 900;
}

.section-title {
    color: var(--text-primary);
    text-shadow: none;
    letter-spacing: 1px;
}

.section-line {
    width: 64px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), #7fa9f2);
    box-shadow: none;
    animation: none;
    border-radius: 3px;
}

/* ---------- 核心优势 ---------- */
.advantages {
    background: #ffffff;
}

.advantage-card {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    box-shadow: var(--card-shadow);
    backdrop-filter: none;
    border-radius: 18px;
}

.advantage-card::before {
    display: none;
}

.advantage-card:hover {
    transform: translateY(-6px);
    border-color: #cfe0fb;
    box-shadow: var(--card-shadow-hover);
}

.advantage-icon {
    filter: none;
    animation: none;
}

.advantage-card h3 {
    color: var(--text-primary);
}

.advantage-card p {
    color: var(--text-secondary);
}

.worry-free-text {
    color: var(--text-secondary) !important;
    text-shadow: none;
}

.click-hint {
    background: #f6f9ff;
    border: 1px solid #e8eefb;
    opacity: 1;
    border-radius: 10px;
}

.advantage-card:hover .click-hint {
    background: var(--primary-light);
    border-color: #cfe0fb;
    transform: none;
}

.hint-text {
    color: var(--primary-color);
}

.hint-icon {
    animation: none;
}

/* ---------- 服务项目 ---------- */
.services {
    background: linear-gradient(180deg, #ffffff 0%, #f6f9ff 100%);
}

.service-card {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    box-shadow: var(--card-shadow);
    backdrop-filter: none;
    border-radius: 18px;
}

.service-card::after {
    background: radial-gradient(circle, rgba(31, 95, 224, 0.05) 0%, transparent 70%);
}

.service-card:hover {
    transform: translateY(-6px);
    border-color: #cfe0fb;
    box-shadow: var(--card-shadow-hover);
}

.service-icon {
    filter: none;
    animation: none;
}

.service-card h3 {
    color: var(--text-primary);
}

.service-card ul li {
    color: var(--text-secondary);
    text-shadow: none;
}

.service-card ul li::before {
    content: '›';
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1;
    top: 6px;
    color: #9dc0f7;
}

.service-card ul li:hover {
    color: var(--primary-deep);
}

.service-card ul li:hover::before {
    color: var(--primary-color);
}

.service-click-hint,
.service-card .click-hint {
    color: var(--primary-color);
}

/* 服务详情 / 折叠内容 */
.service-detail-item {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    box-shadow: var(--card-shadow);
    border-radius: 18px;
}

.service-detail-item:hover {
    border-color: #cfe0fb;
    box-shadow: var(--card-shadow-hover);
}

.detail-item {
    background: #f8fbff;
    border: 1px solid #eaf1fc;
    border-radius: 14px;
}

.detail-title {
    color: var(--text-primary);
}

.detail-text h3 {
    color: var(--primary-deep);
}

.detail-text p,
.detail-description {
    color: var(--text-secondary);
    text-shadow: none;
}

.detail-icon {
    filter: none;
}

.service-item {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    border-radius: 14px;
}

.service-item:hover {
    border-color: #cfe0fb;
    box-shadow: 0 10px 26px rgba(31, 95, 224, 0.08);
}

.item-number {
    background: var(--primary-light);
    color: var(--primary-deep);
    border: 1px solid #d8e5fb;
    box-shadow: none;
}

.item-text {
    color: var(--text-secondary);
}

.highlight-text {
    color: var(--primary-deep);
}

.note-text {
    color: var(--primary-deep);
}

.service-note {
    background: #f6f9ff;
    border-left: 3px solid var(--primary-color);
    border-radius: 10px;
}

.service-highlight-box {
    background: linear-gradient(135deg, #f4f8ff, #ffffff);
    border: 1px solid #e2ebfa;
    border-radius: 16px;
    box-shadow: none;
}

.highlight-title {
    color: var(--primary-deep);
}

.service-special-box {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    border-radius: 18px;
    box-shadow: var(--card-shadow);
}

.special-title {
    color: var(--primary-deep);
}

.special-text {
    color: var(--text-secondary);
}

/* 分类卡片 */
.hardware-category-item,
.category-selector-item,
.sub-category-item {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    box-shadow: var(--card-shadow);
    border-radius: 16px;
}

.hardware-category-item:hover,
.category-selector-item:hover,
.sub-category-item:hover {
    border-color: #cfe0fb;
    box-shadow: var(--card-shadow-hover);
}

.category-selector-item.active,
.sub-category-item.active {
    background: var(--primary-light);
    border-color: var(--primary-color);
    box-shadow: 0 10px 24px rgba(31, 95, 224, 0.12);
}

.category-title {
    color: var(--text-primary);
}

.category-hint {
    color: var(--primary-color);
}

.selector-text,
.sub-text {
    color: var(--text-secondary);
}

.category-selector-item.active .selector-text,
.sub-category-item.active .sub-text {
    color: var(--primary-deep);
}

.carousel-index {
    color: var(--primary-deep);
}

/* 论文展示 / 团队照片 */
.paper-showcase {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    border-radius: 18px;
    box-shadow: var(--card-shadow);
}

.showcase-title {
    color: var(--text-primary);
}

.showcase-header-left,
.showcase-header-right {
    background: transparent;
}

.paper-image-wrapper {
    background: #f6f9ff;
    border: 1px solid #eaf1fc;
    border-radius: 14px;
}

.team-photo-inline,
.team-photo-wrapper {
    background: #f6f9ff;
    border: 1px solid #eaf1fc;
    border-radius: 16px;
}

.view-text {
    color: var(--primary-deep);
}

/* ---------- 轮播 / 图片查看 ---------- */
.carousel-arrow {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid #dbe6f7;
    color: var(--primary-deep);
    box-shadow: 0 6px 18px rgba(15, 40, 90, 0.10);
}

.carousel-arrow:active {
    background: var(--primary-light);
}

.carousel-image,
.carousel-info {
    background: #ffffff;
    border: 1px solid var(--line-soft);
}

.carousel-icon-top .carousel-title {
    color: var(--text-primary);
}

.carousel-content::-webkit-scrollbar-track,
.image-view-container::-webkit-scrollbar-track,
.image-view-content::-webkit-scrollbar-track {
    background: #f2f6fd;
}

.carousel-content::-webkit-scrollbar-thumb,
.image-view-container::-webkit-scrollbar-thumb,
.image-view-content::-webkit-scrollbar-thumb {
    background: #c9d9f0;
}

.image-view-modal .modal-overlay,
.modal-overlay {
    background: rgba(14, 27, 48, 0.55);
    backdrop-filter: blur(8px);
}

.image-view-content {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    border-radius: 18px;
    box-shadow: 0 30px 80px rgba(15, 40, 90, 0.22);
}

/* ---------- 联系模态框 ---------- */
.modal-container {
    filter: none;
}

.modal-content {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    box-shadow: 0 30px 80px rgba(15, 40, 90, 0.18);
    border-radius: 22px;
    backdrop-filter: none;
}

.modal-content::before {
    display: none;
}

.modal-close,
.image-view-modal .modal-close {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    box-shadow: 0 4px 14px rgba(15, 40, 90, 0.08);
}

.modal-close:hover {
    background: var(--primary-light);
    border-color: #cfe0fb;
    box-shadow: none;
}

.modal-close span {
    background: #4a5a72;
}

.modal-badge {
    background: var(--primary-light);
    border: 1px solid #d8e5fb;
    color: var(--primary-deep);
    box-shadow: none;
}

.modal-title {
    color: var(--text-primary);
}

.modal-subtitle {
    color: var(--text-secondary);
    text-shadow: none;
}

/* 联系方式 / 二维码 / 表单 */
.contact-item,
.contact-form,
.qr-item {
    background: #ffffff;
    border: 1px solid var(--line-soft);
    border-radius: 18px;
    box-shadow: var(--card-shadow);
    backdrop-filter: none;
}

.contact-item:hover,
.qr-item:hover {
    border-color: #cfe0fb;
    box-shadow: var(--card-shadow-hover);
}

.contact-item h3,
.contact-form h3 {
    color: var(--text-primary);
    background: none;
    -webkit-text-fill-color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-icon {
    filter: none;
}

.qr-label {
    color: var(--primary-deep);
}

.qr-name {
    color: var(--text-secondary);
}

.qr-code-wrapper {
    background: #ffffff;
    border: 1px solid #eef3fb;
    box-shadow: 0 4px 14px rgba(15, 40, 90, 0.06);
}

.qr-item:hover .qr-code-wrapper {
    box-shadow: 0 10px 26px rgba(31, 95, 224, 0.12);
}

.form-group input,
.form-group textarea {
    background: #fbfdff;
    border: 1px solid #e2ebfa;
    color: var(--text-primary);
    border-radius: 10px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    background: #ffffff;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(31, 95, 224, 0.10);
}

/* ---------- 首页轮播图（后台可管理） ---------- */
.banner-carousel-section {
    padding: 10px 0 34px;
    background: #ffffff;
    position: relative;
}

.banner-carousel {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    aspect-ratio: 1000 / 360;
    background: #f2f6fd;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--line-soft);
}

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

.banner-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
    pointer-events: none;
}

.banner-slide.active {
    opacity: 1;
    pointer-events: auto;
}

.banner-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid #dbe6f7;
    background: rgba(255, 255, 255, 0.92);
    color: var(--primary-deep);
    font-size: 1.6rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s, background 0.3s, transform 0.3s;
    z-index: 5;
    box-shadow: 0 6px 18px rgba(15, 40, 90, 0.12);
}

.banner-carousel:hover .banner-arrow {
    opacity: 1;
}

.banner-arrow:hover {
    background: #ffffff;
    transform: translateY(-50%) scale(1.06);
}

.banner-prev { left: 16px; }
.banner-next { right: 16px; }

.banner-dots {
    position: absolute;
    left: 50%;
    bottom: 14px;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 7px;
    z-index: 5;
    padding: 6px 11px;
    border-radius: 999px;
    background: rgba(15, 32, 60, 0.28);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.banner-dot {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.55);
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.15);
}

.banner-dot.active {
    width: 22px;
    background: #ffffff;
}

@media (max-width: 768px) {
    .banner-carousel {
        aspect-ratio: 10 / 7;
        border-radius: 14px;
    }

    .banner-carousel-section {
        padding-bottom: 40px;
    }

    .banner-arrow { display: none; }
}

/* ---------- 页脚：淡蓝收尾，轻而干净 ---------- */.footer {
    background: linear-gradient(180deg, #ffffff 0%, #f4f8fe 100%);
    color: #7d8aa0;
    border-top: 1px solid var(--line-soft);
    backdrop-filter: none;
    padding: 34px 0;
}

.footer::before {
    display: none;
}

.footer p {
    color: #7d8aa0;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
}

/* ---------- 移动端抽屉导航 ---------- */
@media (max-width: 968px) {
    .nav-links {
        background: #ffffff;
        border-left: 1px solid var(--line-soft);
        box-shadow: -12px 0 40px rgba(15, 40, 90, 0.10);
    }

    .nav-link {
        border: 1px solid #eef3fb;
        background: #fbfdff;
    }

    .nav-link:hover {
        border-color: #d8e5fb;
    }
}

/* =========================================================
   01 核心优势 · 环绕式对称布局
   —— 桌面：2 上 / 1 中 / 2 下，五张卡片环绕中心，卡片等高、提示条底部对齐
   —— 移动：两列对称，第 5 张通栏收尾
   ========================================================= */
.advantages-grid {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    max-width: 900px;
    margin: 0 auto;
    padding: 8px 0 4px;
    isolation: isolate;
}

/* 装饰极简化：不加圆环，仅靠对称排布形成环绕感 */
.advantages-grid::before,
.advantages-grid::after {
    display: none;
}

.advantages-grid > .advantage-card {
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 22px 20px 18px;
    border-radius: 16px;
    min-height: 0;
}

/* 环绕位置：上二 + 中一 + 下二 */
.advantages-grid > .advantage-card:nth-child(1) { grid-column: 1 / span 2; }
.advantages-grid > .advantage-card:nth-child(2) { grid-column: 3 / span 2; }
.advantages-grid > .advantage-card:nth-child(3) { grid-column: 2 / span 2; }
.advantages-grid > .advantage-card:nth-child(4) { grid-column: 1 / span 2; }
.advantages-grid > .advantage-card:nth-child(5) { grid-column: 3 / span 2; }

/* 中心那张稍微“托”一下，形成环绕主位 */
.advantages-grid > .advantage-card:nth-child(3) {
    background: linear-gradient(180deg, #fbfdff 0%, #ffffff 100%);
    border-color: #dce8fb;
    box-shadow: 0 2px 10px rgba(15, 40, 90, 0.05), 0 16px 40px rgba(31, 95, 224, 0.10);
}

.advantage-card .advantage-icon,
.advantage-card > .advantage-icon {
    font-size: 1.85rem;
    line-height: 1;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.advantages-grid .advantage-card h3 {
    font-size: 1rem;
    line-height: 1.4;
    margin: 0 0 7px;
    letter-spacing: 0.2px;
}

.advantages-grid .advantage-card p {
    font-size: 0.8rem;
    line-height: 1.65;
    margin: 0;
    color: var(--text-secondary);
}

.advantages-grid .advantage-card p.worry-free-text {
    color: var(--text-secondary) !important;
}

/* 提示条统一贴底，卡片内上下整齐 */
.advantages-grid .advantage-card .click-hint {
    margin-top: auto;
    margin-bottom: 0;
    padding: 6px 12px;
    gap: 5px;
    border-radius: 999px;
    width: auto;
    max-width: 100%;
}

.advantages-grid .advantage-card .hint-icon {
    font-size: 0.78rem;
}

.advantages-grid .advantage-card .hint-text {
    font-size: 0.7rem;
    white-space: nowrap;
}

/* =========================================================
   02 服务项目 · 双列紧凑（四张 = 两排两列）
   ========================================================= */
.services-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
    align-items: stretch;
}

.service-card {
    padding: 20px 22px 16px;
    border-radius: 16px;
}

.services-grid .service-icon {
    font-size: 1.85rem;
    height: 38px;
    margin-bottom: 8px;
}

.services-grid .service-card h3 {
    font-size: 1rem;
    line-height: 1.4;
    margin: 0 0 6px;
}

.services-grid .service-card ul {
    margin: 0;
    padding: 0;
}

.services-grid .service-card ul li {
    font-size: 0.81rem;
    line-height: 1.55;
    padding: 4px 0 4px 18px;
    overflow-wrap: anywhere;
}

.services-grid .service-card ul li::before {
    font-size: 1rem;
    top: 3px;
}

.services-grid .service-click-hint {
    margin-top: auto;
    padding: 6px 10px;
    gap: 4px;
    border-radius: 999px;
    align-self: center;
}

.services-grid .service-click-hint .hint-icon {
    font-size: 0.75rem;
}

.services-grid .service-click-hint .hint-text {
    font-size: 0.68rem;
    letter-spacing: 0;
    white-space: nowrap;
}

/* ---------- 平板：环绕布局收窄 ---------- */
@media (max-width: 1024px) {
    .advantages-grid {
        max-width: 100%;
        gap: 12px;
    }

    .services-grid {
        max-width: 100%;
    }
}

/* ---------- 手机：两列对称 ---------- */
@media (max-width: 768px) {
    .advantages-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
        max-width: 100%;
        padding: 4px 0 0;
    }

    .advantages-grid::before,
    .advantages-grid::after {
        display: none;
    }

    .advantages-grid > .advantage-card:nth-child(1),
    .advantages-grid > .advantage-card:nth-child(2),
    .advantages-grid > .advantage-card:nth-child(3),
    .advantages-grid > .advantage-card:nth-child(4) {
        grid-column: auto;
    }

    .advantages-grid > .advantage-card:nth-child(5) {
        grid-column: 1 / -1;
    }

    .advantages-grid > .advantage-card {
        padding: 16px 12px 14px;
        border-radius: 14px;
    }

    .advantages-grid > .advantage-card:nth-child(3) {
        background: #ffffff;
        box-shadow: var(--card-shadow);
        border-color: var(--line-soft);
    }

    .advantage-card .advantage-icon,
    .advantage-card > .advantage-icon {
        font-size: 1.6rem;
        height: 28px;
        margin-bottom: 8px;
    }

    .advantages-grid .advantage-card h3 {
        font-size: 0.92rem;
        margin-bottom: 6px;
    }

    .advantages-grid .advantage-card p {
        font-size: 0.74rem;
        line-height: 1.6;
    }

    .advantages-grid .advantage-card .click-hint {
        padding: 5px 9px;
        gap: 4px;
        margin-top: 10px;
    }

    .advantages-grid .advantage-card .hint-text {
        font-size: 0.62rem;
    }

    .services-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
        max-width: 100%;
    }

    .service-card {
        padding: 14px 12px 12px;
        border-radius: 14px;
    }

    .services-grid .service-icon {
        font-size: 1.45rem;
        height: 28px;
        margin-bottom: 4px;
    }

    .services-grid .service-card h3 {
        font-size: 0.88rem;
        margin-bottom: 4px;
    }

    .services-grid .service-card ul li {
        font-size: 0.72rem;
        padding: 3px 0 3px 14px;
        line-height: 1.5;
    }

    .services-grid .service-card ul li::before {
        font-size: 0.85rem;
        top: 2px;
    }

    .services-grid .service-click-hint {
        margin-top: 8px;
        padding: 4px 6px;
        gap: 3px;
        max-width: 100%;
    }

    .services-grid .service-click-hint .hint-icon {
        font-size: 0.62rem;
    }

    .services-grid .service-click-hint .hint-text {
        font-size: 0.56rem;
        overflow: hidden;
        text-overflow: ellipsis;
    }
}

/* =========================================================
   首屏图片页（后台「轮播图」上传的图，与两张文字页共用首屏轮播）
   ========================================================= */
.hero-slide {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-slide-image {
    gap: 22px;
}

.hero-banner {
    width: 100%;
    max-width: 1020px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-banner a {
    display: block;
    border-radius: 20px;
    overflow: hidden;
    background: #ffffff;
    border: 1px solid #e8eefb;
    box-shadow: 0 10px 34px rgba(15, 40, 90, 0.10);
    transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s;
}

.hero-banner a:hover {
    border-color: #cfe0fb;
    box-shadow: 0 16px 44px rgba(31, 95, 224, 0.16);
    transform: translateY(-2px);
}

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

@media (max-width: 768px) {
    .hero-slide-image {
        gap: 16px;
    }

    .hero-banner {
        padding: 0 16px;
    }

    .hero-banner a {
        border-radius: 14px;
        box-shadow: 0 6px 20px rgba(15, 40, 90, 0.10);
    }

    .hero-banner a:hover {
        transform: none;
    }
}

/* 首屏容器宽度约束：避免标题最小内容宽度把容器撑宽，导致右侧被裁 */
.hero > .container,
.hero-carousel,
.hero-carousel-wrapper,
.hero-slide {
    min-width: 0;
}

.hero-slide .hero-content {
    width: 100%;
}

/* =========================================================
   首屏轮播整体收矮 + 核心优势上提
   —— 目的：首屏不要占满一整屏，让 01 核心优势更早出现在视野里
   ========================================================= */

/* 1) 首屏上下留白收小（原来 100/60，视觉上把整块"托"得很高） */
.hero {
    padding: 56px 0 26px;
}

/* 2) 图片页：限制最大高度，等比缩放、不裁切、水平居中 */
.hero-banner {
    max-width: 940px;
    text-align: center;
}

/* 白卡贴合图片实际宽度（竖图时不会左右空一大片） */
.hero-banner a {
    display: inline-block;
    max-width: 100%;
    vertical-align: top;
}

.hero-banner img {
    display: block;
    width: auto;
    max-width: 100%;
    max-height: 540px;
    height: auto;
    margin: 0 auto;
}

/* 3) 核心优势区块上提 */
.advantages {
    padding: 26px 0 56px;
}

/* ---------- 平板 ---------- */
@media (max-width: 1024px) {
    .hero {
        padding: 44px 0 22px;
    }

    .hero-banner {
        max-width: 100%;
    }

    .hero-banner img {
        max-height: 56vh;
    }

    .advantages {
        padding: 22px 0 48px;
    }
}

/* ---------- 手机 ---------- */
@media (max-width: 768px) {
    .hero {
        padding: 28px 0 16px;
    }

    .hero-banner {
        padding: 0 12px;
    }

    .hero-banner img {
        max-height: 62vh;
    }

    .hero-slide-image {
        gap: 8px;
    }

    .advantages {
        padding: 14px 0 40px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 18px 0 12px;
    }

    .hero-banner {
        padding: 0 10px;
    }

    .hero-banner img {
        max-height: 66vh;
    }

    .advantages {
        padding: 10px 0 36px;
    }
}