:root {
    --bg-light: #ffffff;
    --bg-alt: #f8fafc;
    --surface: #ffffff;
    --accent: #0066FF;
    --accent-soft: rgba(0, 102, 255, 0.08);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --glass: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.05);
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
    --card-shadow-hover: 0 25px 50px rgba(0, 102, 255, 0.1);
}

body {
    background-color: var(--bg-light);
    color: var(--text-main);
    font-family: 'Inter', "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.7;
    overflow-x: hidden;
}

/* 导航栏优化 */
.navbar {
    padding: 1rem 0;
    transition: all 0.3s;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    height: 80px;
    display: flex;
    align-items: center;
}

.navbar.scrolled {
    padding: 0.5rem 0;
    height: 70px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

/* LOGO 浮动动效与极致发光 */
@keyframes logo-float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-5px) rotate(1deg); }
}

.navbar-brand {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    transition: all 0.3s;
}

.navbar-brand img {
    height: 60px;
    width: auto;
    object-fit: contain;
    background: transparent !important;
    filter: brightness(1.2) drop-shadow(0 0 5px rgba(0, 102, 255, 0.3));
    transition: all 0.4s;
    animation: logo-float 3s ease-in-out infinite;
    z-index: 2;
    display: block;
}

.navbar.scrolled .navbar-brand img {
    height: 50px;
}

/* 智域科技 个性动态字体 */
.brand-text-dynamic {
    display: flex;
    align-items: center;
    font-family: 'Ma Shan Zheng', cursive;
    font-size: 2.2rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    margin-left: 5px;
}

.navbar.scrolled .brand-text-dynamic {
    font-size: 1.8rem;
}

.brand-text-dynamic span {
    display: inline-block;
    animation: char-float 2.5s ease-in-out infinite;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.05);
}

@keyframes char-float {
    0%, 100% { transform: translateY(0) scale(1); filter: brightness(1); }
    50% { transform: translateY(-8px) scale(1.1); filter: brightness(1.2); }
}

.brand-text-dynamic .char-1 { color: #0066FF; animation-delay: 0s; }
.brand-text-dynamic .char-2 { color: #28a745; animation-delay: 0.2s; }
.brand-text-dynamic .char-3 { color: #fd7e14; animation-delay: 0.4s; }
.brand-text-dynamic .char-4 { color: #dc3545; animation-delay: 0.6s; }

/* 英雄首屏字体与布局 */
.hero-section {
    padding-top: 160px;
    padding-bottom: 100px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 850;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.lead {
    font-size: 1.35rem;
    font-weight: 400;
}

/* 渐变文本 */
.text-gradient {
    background: linear-gradient(135deg, #0f172a 0%, #0066FF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Section 样式 */
.section-title {
    font-size: clamp(2rem, 5vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 3.5rem;
    text-align: left;
}

.section-subtitle {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
    text-align: left;
}

/* 布局网格系统 */
.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.grid-6 {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.5rem;
}

/* 卡片通用样式 */
.tech-card {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2.25rem;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    height: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
}

.tech-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--card-shadow-hover);
    border-color: rgba(0, 102, 255, 0.1);
}

/* 多彩图标容器 */
.icon-box-colorful {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    transition: 0.4s;
}

/* 合作伙伴网格 */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.5rem;
}

.partner-item {
    background: #fff;
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem 1rem;
    text-align: left;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

/* 轮播图优化 - 修复为填满区域 */
.hero-carousel {
    border-radius: 40px;
    overflow: hidden;
    background: #000;
    position: relative;
    height: 480px; /* 增加高度以对齐左侧文字 */
}

.hero-carousel .carousel-inner,
.hero-carousel .carousel-item {
    height: 100%;
}

.hero-carousel .carousel-item {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 移除之前的模糊背景效果，直接填满 */
.hero-carousel .carousel-item::before {
    display: none;
}

/* 核心图片展示 - 填满且无缝隙 */
.hero-carousel .carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* 关键：填满区域，不留空白 */
    position: relative;
    z-index: 2;
    transition: transform 1.2s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.hero-carousel:hover .carousel-item img {
    transform: scale(1.05);
}

/* Caption 玻璃态设计 */
.glass-panel {
    background: rgba(255, 255, 255, 0.88) !important;
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.4) !important;
    border-radius: 16px !important;
    box-shadow: 0 15px 35px rgba(0,0,0,0.12) !important;
    color: #0f172a !important;
    width: fit-content;
    left: 25px !important;
    right: auto !important;
    bottom: 25px !important;
    padding: 10px 18px !important;
    z-index: 3;
    opacity: 0.95;
}

/* 项目案例卡片 */
.case-card {
    border-radius: 24px;
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--glass-border);
    transition: all 0.5s;
    height: 100%;
}

.case-image-wrapper {
    position: relative;
    height: 240px;
    overflow: hidden;
}

.case-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 0.8s;
}

/* 悬浮按钮 */
.floating-controls {
    position: fixed;
    right: 30px;
    bottom: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 9999;
}

.float-btn {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    transition: 0.3s;
    text-decoration: none;
    cursor: pointer;
    border: none;
}

.float-btn-tg { background: #229ED9; }
.float-btn-wx { background: #07C160; }
.float-btn-up { background: var(--accent); opacity: 0; visibility: hidden; }
.float-btn-up.visible { opacity: 1; visibility: visible; }

.float-btn:hover {
    transform: scale(1.1) translateY(-5px);
    color: white;
}

/* 微信模态框深度美化 */
.modal-content {
    background: var(--bg-light);
}

.qr-code-wrapper {
    transition: all 0.3s;
    border: 1px solid rgba(0,0,0,0.03);
}

.qr-code-wrapper:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 30px rgba(0,0,0,0.05) !important;
}

.x-small {
    font-size: 0.7rem;
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-6 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 992px) {
    .partners-grid { grid-template-columns: repeat(3, 1fr); }
    .hero-carousel { height: 400px; }
    .hero-section { padding-top: 120px; }
}

@media (max-width: 768px) {
    .grid-4, .grid-6 { grid-template-columns: 1fr; }
    .hero-title { font-size: 2.2rem; }
    .navbar { height: auto; padding: 0.75rem 0; }
    .hero-carousel { height: 300px; }
    .brand-text-dynamic { font-size: 1.5rem; }
}

/* 手机端底部菜单样式 */
.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #ffffff !important; /* 强制白色背景，防止内容透出 */
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 12px 0 calc(12px + env(safe-area-inset-bottom)); /* 增加内边距 */
    box-shadow: 0 -10px 30px rgba(0,0,0,0.08); /* 加强阴影，使其层次感更强 */
    z-index: 999999; /* 极致的 z-index，确保不被任何元素遮挡 */
    border-top: 1px solid rgba(0,0,0,0.05);
    display: none; /* 默认隐藏，仅在手机端显示 */
    pointer-events: auto;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.75rem; /* 稍微调大字体 */
    font-weight: 700; /* 加粗字体 */
    transition: 0.3s;
    flex: 1;
}

.mobile-nav-item i {
    font-size: 1.5rem; /* 稍微调大图标 */
    margin-bottom: 4px;
}

.mobile-nav-item.active, .mobile-nav-item:active {
    color: var(--accent);
}

.mobile-nav-item.highlight {
    color: var(--accent);
}

/* 手机端布局深度优化 */
@media (max-width: 768px) {
    .mobile-bottom-nav {
        display: flex;
    }

    body {
        padding-bottom: 90px; /* 增加底部留空，确保内容不被遮挡 */
    }

    .hero-section {
        padding-top: 100px;
        padding-bottom: 40px;
        text-align: left;
    }

    .hero-title {
        font-size: 1.85rem;
        margin-bottom: 1rem;
    }

    .hero-section .lead {
        font-size: 1rem;
        margin-bottom: 2rem;
        padding: 0 10px;
    }

    .hero-section .d-flex {
        justify-content: center;
        flex-direction: column;
        gap: 12px !important;
    }

    .hero-section .btn {
        width: 100%;
        padding: 12px;
    }

    .section-title {
        font-size: 1.6rem;
        margin-bottom: 2.5rem;
    }

    /* 手机端网格优化：2列显示更美观 */
    .grid-4 {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px;
    }

    .grid-6 {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 10px;
    }

    .tech-card {
        padding: 1.25rem !important;
        border-radius: 18px;
    }

    .tech-card i {
        font-size: 1.8rem !important;
    }

    .tech-card h6 {
        font-size: 0.85rem;
    }

    /* 核心服务卡片内边距缩小 */
    #core-services .tech-card {
        flex-direction: column !important;
        text-align: left;
        padding: 1rem !important;
    }

    #core-services .icon-box-colorful {
        margin: 0 auto 10px !important;
    }

    /* 承接业务范围卡片 */
    #scope .tech-card {
        padding: 12px 8px !important;
    }

    #scope .tech-card span {
        font-size: 0.75rem;
        line-height: 1.2;
    }

    /* 合作伙伴 */
    .partners-grid {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 10px;
    }

    .partner-item {
        padding: 1rem 0.5rem;
    }

    .partner-icon {
        font-size: 1.6rem !important;
    }

    .partner-name {
        font-size: 0.7rem !important;
    }

    /* 隐藏部分冗余的悬浮按钮 */
    .floating-controls {
        bottom: 110px; /* 进一步上移，防止与菜单冲突 */
        right: 20px;
    }

    .float-btn {
        width: 48px;
        height: 48px;
        font-size: 1.2rem;
    }

    /* 案例卡片高度调整 */
    .case-image-wrapper {
        height: 180px;
    }

    /* 交付标准 */
    #delivery .grid-4 {
        grid-template-columns: 1fr !important;
    }
}

/* Mobile View Switching Logic (Jump Pages Effect) */
@media (max-width: 767px) {
    /* DEFAULT: Hide sections that don't belong to the current view */

    /* View: Home - Show Hero, Services, Scope, Capabilities, Tech, Partners */
    body.view-home #cases,
    body.view-home #pricing,
    body.view-home #delivery,
    body.view-home .footer-cta {
        display: none !important;
    }

    /* View: Works - Show only Cases */
    body.view-works .hero-section,
    body.view-works #core-services,
    body.view-works #scope,
    body.view-works #capabilities,
    body.view-works #tech,
    body.view-works #partners,
    body.view-works #pricing,
    body.view-works #delivery,
    body.view-works .footer-cta {
        display: none !important;
    }

    /* View: Pricing - Show Pricing and Delivery */
    body.view-pricing .hero-section,
    body.view-pricing #core-services,
    body.view-pricing #scope,
    body.view-pricing #capabilities,
    body.view-pricing #tech,
    body.view-pricing #partners,
    body.view-pricing #cases,
    body.view-pricing .footer-cta {
        display: none !important;
    }
}