/* ========================================
   关于我们页面专用样式 - 新增部分
   基于公共基础样式扩展
   ======================================== */

/* ---------- 变量覆盖 ---------- */
:root {
    --bottom-nav-height: 65px;  /* 原为 60px */
    --content-padding: 24px;    /* 新增变量 */
}

/* ---------- 页面标题区域 ---------- */
.page-header {
    padding: 60px 24px 40px;
    text-align: center;
    background: radial-gradient(circle at 50% 50%, rgba(0, 212, 255, 0.06) 0%, transparent 60%);
}

.page-header .section-label {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    background: rgba(0, 212, 255, 0.1);
    padding: 6px 18px;
    border-radius: 50px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: 1px solid rgba(0, 212, 255, 0.25);
    backdrop-filter: blur(10px);
    margin-bottom: 16px;
}

.page-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--white);
    text-shadow: 0 0 25px rgba(0, 212, 255, 0.3);
    margin-bottom: 16px;
}

.page-header p {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ---------- 公司简介 ---------- */
.about-intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 350px;
}

.about-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.about-intro-content h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.about-intro-content p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.highlight-text {
    color: var(--primary);
    font-weight: 600;
}

/* ---------- 品牌故事时间线 ---------- */
.story-timeline {
    position: relative;
    padding-left: 40px;
}

.story-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
}

.story-item {
    position: relative;
    margin-bottom: 32px;
}

.story-item:last-child {
    margin-bottom: 0;
}

.story-item::before {
    content: '';
    position: absolute;
    left: -31px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
    border: 2px solid var(--bg);
}

.story-year {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary);
    background: rgba(0, 212, 255, 0.1);
    padding: 4px 14px;
    border-radius: 50px;
    margin-bottom: 8px;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.story-item h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 6px;
}

.story-item p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* ---------- 业务范围 ---------- */
.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.business-card {
    padding: 30px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.business-card.primary-business {
    border-color: var(--primary);
}

.business-card.primary-business::after {
    content: '核心业务';
    position: absolute;
    top: 12px;
    right: -30px;
    background: var(--primary);
    color: var(--bg);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 4px 40px;
    transform: rotate(45deg);
    letter-spacing: 0.05em;
}

.business-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    display: block;
}

.business-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 10px;
}

.business-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ---------- 公司优势 ---------- */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-card {
    padding: 28px 22px;
    text-align: center;
}

.advantage-card .adv-icon {
    font-size: 2.5rem;
    margin-bottom: 14px;
    display: block;
}

.advantage-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.advantage-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ---------- 数据统计 ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-card {
    padding: 28px 18px;
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 6px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-lighter);
}

/* ---------- 底部导航（结构变化） ---------- */
.bottom-nav-wrapper {
    display: none;
}

.bottom-nav {
    width: 100%;
    height: var(--bottom-nav-height);
    background: rgba(10, 15, 30, 0.95);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(0, 212, 255, 0.2);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 0 24px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.bottom-nav a,
.bottom-nav .drop-btn {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 8px 12px;
    border-radius: var(--radius);
    transition: var(--transition);
    background: none;
    border: none;
    cursor: pointer;
}

.bottom-nav a.active,
.bottom-nav .drop-btn.active {
    color: var(--primary);
}

.bottom-nav .icon {
    font-size: 1.4rem;
}

.bottom-dropdown {
    position: absolute;
    bottom: 75px;
    right: 24px;
    background: rgba(15, 25, 45, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    min-width: 160px;
    padding: 8px 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.bottom-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.bottom-dropdown li a {
    display: block;
    padding: 10px 20px;
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
    text-align: left;
}

.bottom-dropdown li a:hover {
    color: var(--primary);
    background: rgba(0, 212, 255, 0.1);
}

/* ---------- 响应式差异 ---------- */

/* 992px 断点 - 第二份独有 */
@media (max-width: 992px) {
    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 768px 断点 - 新增/覆盖内容 */
@media (max-width: 768px) {
    .about-intro-grid {
        grid-template-columns: 1fr;
    }
    .about-image-wrapper {
        height: 250px;
        order: -1;
    }
    .story-timeline {
        padding-left: 30px;
    }
    .business-grid {
        grid-template-columns: 1fr;
    }
    .advantage-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .bottom-nav-wrapper {
        display: block;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
    }
    body {
        padding-bottom: var(--bottom-nav-height);
    }
}


/* ========================================
   联系我们页面专用样式
   基于公共基础样式扩展
   ======================================== */

/* ---------- 联系信息区块 ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-info-list {
    list-style: none;
    padding: 0;
}

.contact-info-list li {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition);
}

.contact-info-list li:last-child {
    border-bottom: none;
}

.contact-info-list .info-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.15);
}

.contact-info-list .info-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 4px;
}

.contact-info-list .info-content p,
.contact-info-list .info-content a {
    font-size: 0.95rem;
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
    line-height: 1.6;
}

.contact-info-list .info-content a:hover {
    color: var(--primary);
}

/* ---------- 在线表单 ---------- */
.contact-form {
    padding: 32px;
}

.contact-form h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--white);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
    background: rgba(255, 255, 255, 0.08);
}

.form-group select {
    appearance: none;
    cursor: pointer;
}

.form-group select option {
    background: var(--bg-alt);
    color: var(--text);
}

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

/* ---------- 提交按钮 ---------- */
.btn-submit {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 15px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    box-shadow: 0 8px 30px var(--primary-glow);
    width: 100%;
    justify-content: center;
}

.btn-submit:hover {
    box-shadow: 0 12px 36px rgba(123, 47, 247, 0.7);
    transform: translateY(-2px);
}

/* ---------- 提示消息 ---------- */
.form-message {
    padding: 14px 20px;
    border-radius: var(--radius);
    margin-top: 16px;
    font-weight: 500;
    font-size: 0.9rem;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.form-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ---------- 响应式差异 ---------- */
@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}