/* =========================================
   1. 全局配置 (Variables & Reset)
   ========================================= */
:root {
    --brand-orange: #f37021;
    --bg-dark: #05070a; /* 深空黑 */
    --text-white: #ffffff;
    --text-gray: #cfd8e3;
    --card-bg: rgba(20, 25, 35, 0.6);
    --card-border: rgba(255, 255, 255, 0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; }

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-dark);
    color: var(--text-white);
    overflow-x: hidden;
    width: 100vw;
}

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

/* =========================================
   2. 背景与3D容器 (Fixed Positioning)
   ========================================= */
.bg-vignette {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -2;
    background: radial-gradient(circle at 50% 50%, #1a1e29 0%, #000000 100%);
    pointer-events: none;
}

#canvas-container {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1; outline: none;
}

/* =========================================
   3. 导航栏 (Navbar) - 高通透磨砂版
   ========================================= */
nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0 5%;
    height: 80px;
    position: fixed; width: 100%; top: 0; z-index: 100;

    /* --- 核心修改开始 --- */
    /* 1. 背景色：变得非常淡，混合一点点蓝灰色，不再是死黑 */
    background: rgba(20, 25, 35, 0.25);

    /* 2. 滤镜：模糊度加大 + 亮度提升 (让透过来的星星稍微变亮) */
    backdrop-filter: blur(25px) brightness(1.2);
    -webkit-backdrop-filter: blur(25px) brightness(1.2);

    /* 3. 边框：上下都加极细的白线，模拟玻璃切面的反光 */
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    border-top: 1px solid rgba(255, 255, 255, 0.08);

    /* 4. 阴影：增加深邃感，把导航栏托起来 */
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    /* --- 核心修改结束 --- */

    transition: all 0.3s ease;
}

/* Logo */
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-img { height: 40px; width: auto; } /* 控制Logo高度 */
.brand-name { font-size: 1.2rem; font-weight: 700; color: #fff; letter-spacing: 1px; }

/* 链接 */
.nav-links { display: flex; gap: 40px; height: 100%; align-items: center; }
.nav-links a {
    color: var(--text-gray); font-size: 0.95rem; font-weight: 500;
    position: relative; height: 100%; display: flex; align-items: center; transition: 0.3s;
}
.nav-links a:hover, .nav-links a.active { color: #fff; text-shadow: 0 0 10px rgba(255,255,255,0.3); }

/* 顶部高亮条 (Top Bar Effect) */
.nav-links a::before {
    content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%);
    width: 0; height: 3px; background: var(--brand-orange);
    box-shadow: 0 0 10px var(--brand-orange); transition: 0.3s;
    border-radius: 0 0 4px 4px;
}
.nav-links a.active::before { width: 100%; }
.nav-links a:hover::before { width: 60%; }

/* 按钮 (HUD 风格) */
.btn-contact {
    padding: 0.6rem 1.5rem;
    border: 1px solid rgba(243, 112, 33, 0.4);
    border-radius: 4px;
    font-size: 0.9rem; color: var(--brand-orange);
    background: rgba(243, 112, 33, 0.05);
    display: flex; align-items: center; gap: 8px;
    transition: all 0.3s ease;
}
.btn-contact i { font-size: 0.8rem; transition: 0.3s; }
.btn-contact:hover {
    background: var(--brand-orange); color: #fff;
    box-shadow: 0 0 20px rgba(243, 112, 33, 0.4);
    border-color: var(--brand-orange);
}
.btn-contact:hover i { transform: translateX(4px); }

/* =========================================
   4. 第一屏：Hero Section
   ========================================= */
.hero {
    height: 100vh; display: flex; align-items: center; justify-content: flex-start;
    padding: 0 8%; position: relative; z-index: 10;
}
.hero-text { max-width: 650px; text-shadow: 0 2px 15px rgba(0,0,0,0.9); margin-top: -20px; }

.tag {
    color: var(--brand-orange); font-size: 0.8rem; letter-spacing: 3px;
    margin-bottom: 1.2rem; display: block; text-transform: uppercase; font-weight: 600;
    background: linear-gradient(90deg, rgba(243,112,33,0.15), transparent);
    padding: 5px 10px; width: fit-content; border-left: 2px solid var(--brand-orange);
}
.hero h1 { font-size: 4.2rem; line-height: 1.1; margin-bottom: 1.8rem; font-weight: 800; letter-spacing: 1px; }
.hero h1 span { color: var(--brand-orange); text-shadow: 0 0 30px rgba(243, 112, 33, 0.4); }
.hero p { font-size: 1.15rem; color: var(--text-gray); margin-bottom: 2.8rem; line-height: 1.8; font-weight: 300; max-width: 90%; }

.btn-primary {
    padding: 1rem 2.8rem; background: var(--brand-orange); color: white;
    border-radius: 4px; font-weight: 600; letter-spacing: 1px;
    box-shadow: 0 10px 30px rgba(243, 112, 33, 0.3); display: inline-block;
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 15px 40px rgba(243, 112, 33, 0.5); }

/* =========================================
   5. 第二屏：解决方案 (Solutions)
   ========================================= */
.solutions-section {
    min-height: 100vh; padding: 120px 8%;
    position: relative; z-index: 10;
    background: linear-gradient(to bottom, transparent, rgba(5,7,10,0.95) 20%);
}

.section-header { text-align: center; margin-bottom: 80px; max-width: 800px; margin-left: auto; margin-right: auto; }
.section-tag { color: var(--brand-orange); font-size: 0.8rem; letter-spacing: 2px; text-transform: uppercase; font-weight: bold; display: block; margin-bottom: 15px; }
.section-header h2 { font-size: 2.5rem; font-weight: 700; margin-bottom: 20px; }
.section-header h2 span { color: var(--brand-orange); }
.section-header p { color: var(--text-gray); font-size: 1.1rem; line-height: 1.6; }

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

/* 可选：让第二屏的卡片也变透 */
.tech-card {
    background: rgba(30, 35, 45, 0.3); /* 变透 */
    backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1); /* 边框稍微亮一点 */
    /* ...其他属性保持不变... */
    border-top: 3px solid var(--brand-orange);
    padding: 40px 30px; border-radius: 4px;
    transition: all 0.4s ease; position: relative; overflow: hidden;
}

.tech-card:hover {
    transform: translateY(-10px);
    border-color: rgba(243, 112, 33, 0.5);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4), 0 0 20px rgba(243, 112, 33, 0.1);
}
.tech-card:hover .card-icon { color: var(--brand-orange); transform: scale(1.1); }

.card-icon { font-size: 2.5rem; color: #fff; margin-bottom: 25px; transition: 0.3s; }
.tech-card h3 { font-size: 1.4rem; margin-bottom: 15px; font-weight: 600; }
.card-desc { font-size: 0.95rem; color: #a0aab5; line-height: 1.7; margin-bottom: 25px; }

.card-tags { display: flex; gap: 10px; flex-wrap: wrap; }
.card-tags span {
    font-size: 0.75rem; padding: 4px 10px;
    background: rgba(255,255,255,0.05); border-radius: 20px; color: #ccc;
}

/* =========================================
   6. 行星轨道 UI (HUD System)
   ========================================= */
.hud-wrapper { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 5; }
.orbit-track-large { position: absolute; top: 50%; left: 75%; width: 650px; height: 650px; border: 1px dashed rgba(255,255,255,0.05); border-radius: 50%; transform: translate(-50%, -50%); pointer-events: none; }
.orbit-track-small { position: absolute; top: 50%; left: 75%; width: 450px; height: 450px; border: 1px solid rgba(255,255,255,0.03); border-radius: 50%; transform: translate(-50%, -50%); pointer-events: none; }
.orbit-item { position: absolute; display: flex; align-items: center; gap: 15px; animation: fade-in 1s ease-out forwards; opacity: 0; }
.orbit-text h4 { color: #fff; font-size: 0.8rem; margin-bottom: 4px; font-weight: 600; letter-spacing: 1px; }
.orbit-text .sub { color: var(--brand-orange); font-size: 0.7rem; font-family: monospace; opacity: 0.8; }

.orbit-top { top: 20%; right: 15%; animation-delay: 0.5s; }
.circle-gauge { width: 50px; height: 50px; position: relative; border-radius: 50%; border: 1px solid rgba(255,255,255,0.1); display: flex; justify-content: center; align-items: center; background: rgba(0,0,0,0.3); backdrop-filter: blur(4px); }
.circle-gauge::before { content: ''; position: absolute; top: -3px; left: -3px; right: -3px; bottom: -3px; border-radius: 50%; border: 2px solid transparent; border-top-color: var(--brand-orange); border-right-color: var(--brand-orange); animation: spin 4s linear infinite; }
.gauge-val { font-size: 0.9rem; font-weight: bold; color: #fff; }

.orbit-bottom { bottom: 25%; right: 10%; flex-direction: row-reverse; text-align: right; animation-delay: 0.8s; }
.arc-scanner { width: 50px; height: 50px; position: relative; }
.arc-scanner::after { content: ''; position: absolute; right: 0; top: 0; width: 100%; height: 100%; border-radius: 50%; border: 1px solid rgba(255,255,255,0.1); border-right: 2px solid var(--brand-orange); }
.arc-dot { position: absolute; top: 50%; left: 50%; width: 6px; height: 6px; background: var(--brand-orange); border-radius: 50%; transform: translate(-50%, -50%); box-shadow: 0 0 10px var(--brand-orange); animation: pulse 2s infinite; }

.orbit-mid { top: 55%; right: 38%; animation-delay: 1.1s; }
.satellite-dot { width: 8px; height: 8px; background: var(--brand-orange); border-radius: 50%; position: relative; box-shadow: 0 0 10px var(--brand-orange); }
.connect-line { width: 60px; height: 1px; background: linear-gradient(90deg, var(--brand-orange), transparent); }

.orbit-vertical { position: absolute; right: 5%; top: 35%; bottom: 35%; width: 20px; border-left: 1px solid rgba(255,255,255,0.1); display: flex; flex-direction: column; justify-content: space-between; align-items: flex-start; padding-left: 5px; animation-delay: 1.3s; opacity: 0; animation: fade-in 1s forwards 1.3s; }
.v-tick { height: 1px; width: 6px; background: rgba(255,255,255,0.3); }
.v-tick.long { width: 12px; background: var(--brand-orange); }
.v-slider { position: absolute; left: -2px; top: 20%; width: 4px; height: 30px; background: var(--brand-orange); box-shadow: 0 0 10px var(--brand-orange); animation: slide-vertical 4s ease-in-out infinite alternate; }

.orbit-grid { position: absolute; bottom: 15%; left: 55%; transform: translateX(-50%); display: flex; gap: 4px; animation-delay: 1.5s; opacity: 0; animation: fade-in 1s forwards 1.5s; }
.grid-cell { width: 8px; height: 12px; background: rgba(255,255,255,0.1); }
.grid-cell.active { background: var(--brand-orange); animation: blink-grid 2s infinite; }
.grid-cell:nth-child(2) { animation-delay: 0.2s; }
.grid-cell:nth-child(4) { animation-delay: 0.5s; }

.orbit-lock { position: absolute; top: 15%; right: 35%; width: 30px; height: 30px; border: 1px solid rgba(255,255,255,0.2); border-left: none; border-bottom: none; animation-delay: 1.7s; opacity: 0; animation: fade-in 1s forwards 1.7s; }
.orbit-lock::after { content: '+'; position: absolute; top: -8px; right: -4px; color: var(--brand-orange); font-size: 12px; }
.lock-text { position: absolute; top: 5px; right: 10px; color: rgba(255,255,255,0.5); font-size: 0.6rem; font-family: monospace; }

@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
@keyframes pulse { 0% { opacity: 1; } 50% { opacity: 0.5; } 100% { opacity: 1; } }
@keyframes fade-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slide-vertical { 0% { top: 20%; } 100% { top: 80%; } }
@keyframes blink-grid { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

@media (max-width: 992px) {
    .hero { flex-direction: column; text-align: center; justify-content: center; padding-top: 100px; }
    .nav-links, .hud-wrapper { display: none; }
    .hero h1 { font-size: 2.8rem; }
    .cards-grid { grid-template-columns: 1fr; }
}

/* =========================================
   6. 第三屏：行业解决方案 (Accordion)
   ========================================= */
.features-section {
    min-height: 100vh;
    padding: 100px 5%; /* 左右留白少一点，给手风琴腾空间 */
    position: relative; z-index: 10;
    /* 背景再深一点，突出大图 */
    background: rgba(5, 7, 10, 0.9);
}

/* 手风琴容器 */
.accordion-wrapper {
    display: flex;
    height: 600px; /* 固定高度 */
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    gap: 15px;
}

/* 单个手风琴项 */
.accordion-item {
    position: relative;
    flex: 1; /* 默认大家平分宽度 */
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.25, 1, 0.5, 1); /* 缓动曲线 */
    border: 1px solid rgba(255,255,255,0.1);
}

/* 激活/悬停状态：变宽 */
.accordion-item:hover, .accordion-item.active {
    flex: 3.5; /* 展开后占据 3.5 倍份额 */
    border-color: var(--brand-orange);
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

/* 背景图片 */
.acc-bg {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover; background-position: center;
    transition: transform 0.5s ease;
    /*filter: grayscale(100%) brightness(0.6); !* 默认黑白且暗 *!*/
}

/* 展开时：图片变彩色，稍微放大 */
.accordion-item:hover .acc-bg, .accordion-item.active .acc-bg {
    filter: grayscale(0%) brightness(0.9);
    transform: scale(1.05);
}

/* 遮罩层 (让字更清晰) */
.acc-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to top, #05070a 0%, transparent 70%);
}

/* 内容区域 */
.acc-content {
    position: absolute; bottom: 0; left: 0; width: 100%;
    padding: 30px;
    display: flex; flex-direction: column; justify-content: flex-end;
    z-index: 2;
}

/* 图标 */
.acc-icon {
    width: 50px; height: 50px;
    background: rgba(255,255,255,0.1); backdrop-filter: blur(5px);
    border-radius: 50%; display: flex; justify-content: center; align-items: center;
    font-size: 1.2rem; color: #fff; margin-bottom: 20px;
    border: 1px solid rgba(255,255,255,0.2);
}
.accordion-item:hover .acc-icon, .accordion-item.active .acc-icon {
    background: var(--brand-orange); border-color: var(--brand-orange);
}

/* 文字内容区域 */
.acc-text {
    opacity: 0; /* 默认隐藏详情 */
    transform: translateY(20px);
    transition: all 0.4s ease 0.1s;
    height: 0; overflow: hidden; /* 没展开时高度为0 */
}

/* 展开时显示文字 */
.accordion-item:hover .acc-text, .accordion-item.active .acc-text {
    opacity: 1; transform: translateY(0);
    height: auto; /* 恢复高度 */
}

.acc-text h3 { font-size: 1.8rem; font-weight: 700; margin-bottom: 10px; color: #fff; }
.acc-desc { font-size: 0.95rem; color: #ccc; line-height: 1.6; margin-bottom: 20px; max-width: 450px; }

.acc-btn {
    display: inline-flex; align-items: center; gap: 8px;
    color: var(--brand-orange); font-size: 0.9rem; font-weight: 600;
    padding: 8px 0; border-bottom: 2px solid transparent;
}
.acc-btn:hover { border-color: var(--brand-orange); letter-spacing: 1px; }

/* 竖排标题 (收起时显示) */
/* 竖排标题 (收起时显示) */
.acc-title-vertical {
    position: absolute;
    bottom: 120px; left: 0; width: 100%;
    text-align: center;

    /* 核心修复：不使用 writing-mode，而是直接旋转 */
    /* 这样字的方向绝对不会反 */
    /*writing-mode: vertical-rl; !* 竖排 *!*/
    text-orientation: upright; /* 字正立 */
    letter-spacing: 10px;      /* 增加字间距，更有设计感 */

    font-size: 1.1rem; font-weight: 700; color: rgba(255,255,255,0.5);
    transition: 0.3s;
    pointer-events: none; /* 防止挡住点击 */
}

/* 激活状态下隐藏竖排标题 */
.accordion-item:hover .acc-title-vertical,
.accordion-item.active .acc-title-vertical {
    opacity: 0; transform: translateY(20px);
}

/* 移动端适配：变为垂直堆叠 */
@media (max-width: 992px) {
    .accordion-wrapper { flex-direction: column; height: auto; }
    .accordion-item { height: 250px; flex: none; }
    .accordion-item:hover, .accordion-item.active { flex: none; height: 400px; }
    .acc-title-vertical { display: none; } /* 移动端不显示竖排字 */
    .acc-text { height: auto; opacity: 1; transform: none; } /* 移动端不折叠文字，或者简化 */
    .acc-desc { display: none; } /* 移动端太挤，可能要隐藏描述，只留标题 */
    .accordion-item.active .acc-desc { display: block; }
}

/* =========================================
   7. 第四屏：成功案例 (Bento Grid)
   ========================================= */
.cases-section {
    min-height: 100vh;
    padding: 100px 8%;
    position: relative; z-index: 10;
    background: linear-gradient(to top, #05070a, rgba(5,7,10,0.9)); /* 底部纯黑，向上过渡 */
}

.cases-grid {
    display: grid;
    grid-template-columns: 1fr 1fr; /* 两列布局 */
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

/* 宽卡片：占据两列 */
.case-card.case-wide {
    grid-column: span 2;
}

.case-card {
    position: relative;
    height: 350px; /* 默认高度 */
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.1);
    cursor: pointer;
    group: 1; /* 用于hover */
}

/* 宽卡片高度稍微高一点，更有气势 */
.case-card.case-wide { height: 400px; }

/* 背景图 */
.case-bg {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover; background-position: center;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    /*filter: grayscale(100%) brightness(0.7); !* 默认黑白 *!*/
}

/* 遮罩层：渐变黑，为了让文字清晰 */
.case-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0.2) 60%, transparent 100%);
    opacity: 0.8; transition: 0.3s;
}

/* 背景大数字水印 */
.case-num {
    position: absolute; top: 20px; right: 30px;
    font-size: 4rem; font-weight: 800;
    color: rgba(255,255,255,0.05); /* 极淡 */
    font-family: 'Impact', sans-serif;
    transition: 0.3s;
}

/* 内容区域 */
.case-content {
    position: absolute; bottom: 0; left: 0; width: 100%;
    padding: 40px;
    z-index: 2;
    transform: translateY(20px); /* 默认文字稍微下沉 */
    transition: all 0.4s ease;
}

.case-tags span {
    display: inline-block; font-size: 0.75rem; color: var(--brand-orange);
    border: 1px solid var(--brand-orange); padding: 2px 8px;
    margin-right: 8px; margin-bottom: 10px; border-radius: 2px;
    background: rgba(243,112,33,0.1);
}

.case-content h3 { font-size: 1.6rem; color: #fff; margin-bottom: 10px; font-weight: 700; }
.case-content p {
    color: #ccc; font-size: 0.95rem; line-height: 1.6; margin-bottom: 20px;
    max-width: 600px;
    opacity: 0.8;
}

.case-link {
    display: inline-flex; align-items: center; gap: 10px;
    color: #fff; font-size: 0.9rem; font-weight: 600;
    opacity: 0; transform: translateX(-20px); /* 默认隐藏 */
    transition: all 0.4s ease;
}
.case-link i { color: var(--brand-orange); }

/* --- 交互效果 --- */
.case-card:hover {
    border-color: var(--brand-orange);
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

/* 1. 图片变彩色并放大 */
.case-card:hover .case-bg {
    transform: scale(1.1);
    filter: grayscale(0%) brightness(1);
}

/* 2. 数字变亮一点点 */
.case-card:hover .case-num {
    color: rgba(243, 112, 33, 0.2);
    transform: scale(1.1);
}

/* 3. 内容上浮 */
.case-card:hover .case-content {
    transform: translateY(0);
}

/* 4. 链接滑入显示 */
.case-card:hover .case-link {
    opacity: 1; transform: translateX(0);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .cases-grid { grid-template-columns: 1fr; }
    .case-card.case-wide { grid-column: span 1; height: 350px; }
    .case-content { padding: 20px; transform: translateY(0); } /* 移动端不隐藏内容 */
    .case-link { opacity: 1; transform: none; }
}

/* =========================================
   8. 详情模态框 (Modal)
   ========================================= */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex; justify-content: center; align-items: center;
    opacity: 0; pointer-events: none; /* 默认隐藏 */
    transition: opacity 0.4s ease;
}

.modal-overlay.open {
    opacity: 1; pointer-events: auto;
}

.modal-content {
    width: 90%; max-width: 1200px; height: 80vh;
    background: #0b0f19;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    display: flex; overflow: hidden;
    position: relative;
    transform: scale(0.95); transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.modal-overlay.open .modal-content { transform: scale(1); }

/* 关闭按钮 */
.modal-close {
    position: absolute; top: 20px; right: 20px;
    width: 40px; height: 40px;
    background: rgba(255,255,255,0.1); border: none; border-radius: 50%;
    color: #fff; font-size: 1.2rem; cursor: pointer; z-index: 10;
    transition: 0.3s;
}
.modal-close:hover { background: var(--brand-orange); transform: rotate(90deg); }

/* 左侧图区 */
.modal-gallery {
    flex: 1.5;
    position: relative;
    overflow: hidden;
    background: #000; /* 视频加载前的背景色 */
}

/* 删除原来的 .modal-img 样式，或者保留也行，但下面是 Video 的样式 */
.modal-gallery video {
    width: 100%;
    height: 100%;
    object-fit: cover; /* 关键：像背景图一样裁切填充，保证没有黑边 */
    display: block;
}
.modal-img {
    width: 100%; height: 100%;
    background-size: cover; background-position: center;
}

/* 右侧文案区 */
.modal-info {
    flex: 1; padding: 60px 50px;
    display: flex; flex-direction: column; justify-content: center;
    border-left: 1px solid rgba(255,255,255,0.05);
}

.modal-info h2 { font-size: 2rem; margin-bottom: 20px; color: #fff; line-height: 1.3; }
.modal-tags span {
    display: inline-block; font-size: 0.75rem; color: var(--brand-orange);
    border: 1px solid var(--brand-orange); padding: 4px 12px;
    margin-right: 10px; margin-bottom: 20px; border-radius: 20px;
}

.modal-desc p { color: #a0aab5; line-height: 1.8; margin-bottom: 20px; font-size: 0.95rem; }

.modal-stats {
    display: flex; gap: 30px; margin-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 30px; list-style: none;
}
.modal-stats li strong { display: block; font-size: 1.5rem; color: #fff; margin-bottom: 5px; }
.modal-stats li span { font-size: 0.8rem; color: #666; }

@media (max-width: 992px) {
    .modal-content { flex-direction: column; height: auto; max-height: 90vh; overflow-y: auto; }
    .modal-gallery { height: 250px; flex: none; }
    .modal-info { padding: 30px; }
}

/* =========================================
   9. 第五屏：商务合作 (Contact)
   ========================================= */
.contact-section {
    min-height: 90vh;
    padding: 100px 8% 40px; /* 底部留空给footer */
    position: relative; z-index: 10;
    /* 底部深渊背景 */
    background: radial-gradient(circle at 50% 100%, #1a1e29 0%, #05070a 80%);
    display: flex; flex-direction: column; justify-content: center;
}

.contact-container {
    display: flex; gap: 80px; max-width: 1200px; margin: 0 auto; width: 100%;
    align-items: flex-start;
}

/* 左侧信息 */
.contact-info { flex: 1; }
.contact-info h2 { font-size: 3rem; margin-bottom: 20px; }
.contact-info h2 span { color: var(--brand-orange); }
.contact-info p { color: #a0aab5; line-height: 1.7; margin-bottom: 40px; }

.info-list { list-style: none; }
.info-list li { display: flex; gap: 20px; margin-bottom: 30px; }
.icon-box {
    width: 50px; height: 50px; background: rgba(255,255,255,0.05);
    border-radius: 50%; display: flex; justify-content: center; align-items: center;
    color: var(--brand-orange); font-size: 1.2rem; border: 1px solid rgba(255,255,255,0.1);
}
.info-list h4 { color: #fff; margin-bottom: 5px; font-size: 1rem; }
.info-list p { margin-bottom: 0; font-size: 0.9rem; color: #ccc; }

/* 右侧表单 */
.contact-form-wrapper { flex: 1; }

.holo-form {
    background: rgba(20, 25, 35, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-top: 3px solid var(--brand-orange);
    padding: 40px; border-radius: 4px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.holo-form h3 { color: #fff; margin-bottom: 30px; font-size: 1.5rem; }

/* 输入框组 */
.input-group { position: relative; margin-bottom: 30px; }

.input-group input, .input-group textarea {
    width: 100%; padding: 10px 0;
    background: transparent; border: none;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    color: #fff; font-size: 1rem; outline: none;
    transition: 0.3s;
}

/* 动态 Label */
.input-group label {
    position: absolute; top: 10px; left: 0;
    color: #666; transition: 0.3s; pointer-events: none;
}

/* 输入框聚焦或有内容时，Label 上浮 */
.input-group input:focus ~ label,
.input-group input:valid ~ label,
.input-group textarea:focus ~ label,
.input-group textarea:valid ~ label {
    top: -15px; font-size: 0.8rem; color: var(--brand-orange);
}

/* 底部动效线条 */
.input-group .line {
    position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
    background: var(--brand-orange); transition: 0.3s;
}
.input-group input:focus ~ .line, .input-group textarea:focus ~ .line { width: 100%; }

/* 提交按钮 */
.btn-submit {
    width: 100%; padding: 15px; background: var(--brand-orange);
    color: #fff; border: none; border-radius: 4px; font-size: 1rem; font-weight: 600;
    cursor: pointer; transition: 0.3s; display: flex; justify-content: center; align-items: center; gap: 10px;
}
.btn-submit:hover { background: #ff8c42; box-shadow: 0 0 20px rgba(243, 112, 33, 0.4); }

/* 底部 Footer */
.site-footer {
    margin-top: auto; /* 推到底部 */
    padding-top: 50px; border-top: 1px solid rgba(255,255,255,0.05);
    text-align: center; color: #444; font-size: 0.8rem;
}

@media (max-width: 992px) {
    .contact-container { flex-direction: column; gap: 50px; }
    .contact-info h2 { font-size: 2.5rem; }
}

/* =========================================
   10. 滚动条美化 (Brand Orange Version)
   ========================================= */

/* 针对 Firefox */
html {
    scrollbar-width: thin;
    /* 滑块橙色，轨道深色 */
    scrollbar-color: var(--brand-orange) var(--bg-dark);
}

/* 针对 Chrome, Edge, Safari */
::-webkit-scrollbar {
    width: 6px;  /* 保持纤细，因为颜色很亮，太宽会抢眼 */
    height: 6px;
}

/* 轨道 (Track) - 保持深空黑，让橙色条浮在上面 */
::-webkit-scrollbar-track {
    background: #0b0f19; /* 比背景稍亮一点点的黑，或者直接透明 */
    border-radius: 0;
}

/* 滑块 (Thumb) - 品牌橙 */
::-webkit-scrollbar-thumb {
    background: var(--brand-orange);
    border-radius: 10px;
    /* 增加一点内阴影或渐变感 (可选，这里用纯色更干脆) */
}

/* 鼠标悬停在滑块上 - 变亮 + 发光 */
::-webkit-scrollbar-thumb:hover {
    background: #ff8c42; /* 稍微亮一点的橙色 */
    box-shadow: 0 0 15px var(--brand-orange); /* 霓虹灯光晕效果 */
}