/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    overflow-x: hidden;
    background-color: #050510;
    font-family: 'Inter', '思源黑体', 'Microsoft YaHei', sans-serif;
}

/* ===== 背景画布 ===== */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* ===== 顶部导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    height: 72px;
    background: linear-gradient(180deg, rgba(5, 8, 20, 0.95) 0%, rgba(5, 8, 20, 0.6) 70%, transparent 100%);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(60, 140, 255, 0.15);
}

.navbar .brand {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 6px;
    text-transform: uppercase;
    background: linear-gradient(135deg, #ffffff, #88ddff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 20px rgba(0, 160, 255, 0.8);
    user-select: none;
}

.navbar .nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.navbar .nav-links a {
    display: block;
    padding: 10px 22px;
    font-size: 1rem;
    font-weight: 500;
    color: #aabbdd;
    text-decoration: none;
    letter-spacing: 2px;
    transition: color 0.3s ease, text-shadow 0.3s ease;
    position: relative;
    white-space: nowrap;
}

.navbar .nav-links a:hover {
    color: #ffffff;
    text-shadow: 0 0 15px rgba(0, 160, 255, 0.9), 0 0 30px rgba(0, 100, 255, 0.5);
}

.navbar .nav-links a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #00aaff, #aa44ff, transparent);
    transition: transform 0.3s ease;
    border-radius: 2px;
}

.navbar .nav-links a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.navbar .nav-links a.active {
    color: #ffffff;
    text-shadow: 0 0 15px rgba(0, 160, 255, 0.9);
}

.navbar .nav-links a.active::after {
    transform: translateX(-50%) scaleX(1);
    background: linear-gradient(90deg, transparent, #00ccff, #aa44ff, transparent);
}

/* ===== 页面内容通用容器 ===== */
.page-content {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    padding: 140px 40px 80px;
    max-width: 1200px;
    margin: 0 auto;
    color: #ffffff;
}

/* ===== 首页首屏 ===== */
.hero {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    text-align: center;
    padding: 0 20px;
    pointer-events: none;
}

.hero h1 {
    font-size: 5.5rem;
    font-weight: 800;
    letter-spacing: 16px;
    text-transform: uppercase;
    text-shadow: 0 0 50px rgba(0, 180, 255, 0.9), 0 0 100px rgba(0, 100, 255, 0.5);
    background: linear-gradient(135deg, #ffffff, #88ddff, #aa88ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.hero .sub-en {
    font-size: 1.3rem;
    letter-spacing: 6px;
    color: #88bbee;
    margin-top: 25px;
    font-weight: 300;
    opacity: 0.9;
}

.hero .sub-cn {
    font-size: 1.1rem;
    letter-spacing: 8px;
    color: #6699cc;
    margin-top: 15px;
    font-weight: 300;
    opacity: 0.8;
}

/* ===== 通用标题 ===== */
.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 6px;
    text-transform: uppercase;
    margin-bottom: 50px;
    text-align: center;
    background: linear-gradient(135deg, #ffffff, #88ddff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(0, 160, 255, 0.5);
}

/* ===== 卡片网格 ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: rgba(10, 20, 45, 0.6);
    border: 1px solid rgba(60, 140, 255, 0.25);
    border-radius: 12px;
    padding: 35px 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-6px);
    border-color: rgba(0, 180, 255, 0.6);
    box-shadow: 0 10px 40px rgba(0, 120, 255, 0.25);
}

.card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: #88ddff;
    margin-bottom: 15px;
}

.card p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: #99aacc;
    letter-spacing: 0.5px;
}

/* ===== 时间轴（解决方案页） ===== */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #00aaff, #aa44ff, transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -38px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #00aaff;
    box-shadow: 0 0 15px #00aaff, 0 0 30px rgba(0, 170, 255, 0.5);
}

.timeline-item h3 {
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: #88ddff;
    margin-bottom: 10px;
}

.timeline-item p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: #99aacc;
}

/* ===== 新闻列表 ===== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.news-item {
    background: rgba(10, 20, 45, 0.6);
    border: 1px solid rgba(60, 140, 255, 0.25);
    border-radius: 12px;
    padding: 30px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.news-item:hover {
    transform: translateX(6px);
    border-color: rgba(0, 180, 255, 0.6);
}

.news-item .date {
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: #5588bb;
    margin-bottom: 10px;
}

.news-item h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: #88ddff;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.news-item p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: #99aacc;
}

/* ===== 关于我们 ===== */
.about-block {
    background: rgba(10, 20, 45, 0.6);
    border: 1px solid rgba(60, 140, 255, 0.25);
    border-radius: 12px;
    padding: 40px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin-bottom: 30px;
}

.about-block h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #88ddff;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.about-block p {
    font-size: 0.98rem;
    line-height: 2;
    color: #99aacc;
    margin-bottom: 15px;
}

.about-block ul {
    list-style: none;
    padding-left: 0;
}

.about-block ul li {
    font-size: 0.95rem;
    line-height: 2;
    color: #99aacc;
    padding-left: 20px;
    position: relative;
}

.about-block ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #00aaff;
}

/* ===== 联系页面 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info {
    background: rgba(10, 20, 45, 0.6);
    border: 1px solid rgba(60, 140, 255, 0.25);
    border-radius: 12px;
    padding: 40px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.contact-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #88ddff;
    margin-bottom: 25px;
    letter-spacing: 2px;
}

.contact-info .info-item {
    margin-bottom: 20px;
}

.contact-info .info-label {
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: #5588bb;
    margin-bottom: 5px;
}

.contact-info .info-value {
    font-size: 1rem;
    color: #cce0ff;
    letter-spacing: 0.5px;
}

.contact-form {
    background: rgba(10, 20, 45, 0.6);
    border: 1px solid rgba(60, 140, 255, 0.25);
    border-radius: 12px;
    padding: 40px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.contact-form h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #88ddff;
    margin-bottom: 25px;
    letter-spacing: 2px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 16px;
    margin-bottom: 18px;
    background: rgba(5, 10, 25, 0.8);
    border: 1px solid rgba(60, 140, 255, 0.3);
    border-radius: 8px;
    color: #ffffff;
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: #00aaff;
    box-shadow: 0 0 15px rgba(0, 170, 255, 0.3);
}

.contact-form textarea {
    min-height: 140px;
    resize: vertical;
}

.contact-form button {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #0055cc, #00aaff);
    border: none;
    border-radius: 8px;
    color: #ffffff;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 3px;
    cursor: pointer;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.contact-form button:hover {
    box-shadow: 0 0 30px rgba(0, 170, 255, 0.5);
    transform: translateY(-2px);
}

/* ===== 页脚 ===== */
.footer {
    position: relative;
    z-index: 10;
    text-align: center;
    padding: 30px 20px;
    font-size: 0.8rem;
    letter-spacing: 1px;
    color: #336688;
    border-top: 1px solid rgba(60, 140, 255, 0.1);
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
    .navbar {
        padding: 0 20px;
        height: 60px;
    }
    .navbar .brand {
        font-size: 1.1rem;
        letter-spacing: 4px;
    }
    .navbar .nav-links a {
        padding: 8px 12px;
        font-size: 0.85rem;
        letter-spacing: 1px;
    }
    .page-content {
        padding: 120px 20px 60px;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .section-title {
        font-size: 1.6rem;
        letter-spacing: 4px;
    }
}

@media (max-width: 640px) {
    .navbar {
        flex-direction: column;
        height: auto;
        padding: 12px 10px;
        gap: 8px;
    }
    .navbar .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 2px;
    }
    .navbar .nav-links a {
        padding: 6px 10px;
        font-size: 0.78rem;
    }
    .hero h1 {
        font-size: 3rem;
        letter-spacing: 8px;
    }
    .hero .sub-en {
        font-size: 0.9rem;
        letter-spacing: 3px;
        margin-top: 20px;
    }
    .hero .sub-cn {
        font-size: 0.8rem;
        letter-spacing: 4px;
        margin-top: 12px;
    }
    .page-content {
        padding: 140px 15px 50px;
    }
    .card-grid {
        grid-template-columns: 1fr;
    }
    .about-block {
        padding: 25px;
    }
    .contact-info,
    .contact-form {
        padding: 25px;
    }
}