/* ============================================
   企业官网模板 — Layout（导航 / Footer / 面包屑）
   大气升级：导航毛玻璃、Footer 深蓝夜色渐变
   ============================================ */

/* ── 导航栏（毛玻璃）── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(15, 23, 42, 0.07);
    transition: box-shadow var(--transition-normal), background var(--transition-normal);
}

.nav--scrolled {
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 6px 28px rgba(15, 23, 42, 0.08);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--color-primary-700);
    flex-shrink: 0;
    letter-spacing: -0.01em;
}

.nav__logo svg {
    width: 26px;
    height: 26px;
    flex-shrink: 0;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 2px;
}

.nav__link {
    padding: 8px 14px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-primary);
    background: rgba(37, 99, 235, 0.08);
}

.nav__link--cta {
    background: var(--gradient-primary);
    color: #fff;
    margin-left: var(--space-md);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.nav__link--cta:hover {
    background: var(--gradient-primary);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 12px 26px rgba(37, 99, 235, 0.42);
}

/* 下拉菜单（毛玻璃浮层） */
.nav__dropdown {
    position: relative;
}

.nav__dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 210px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-sm);
    z-index: 1001;
}

.nav__dropdown:hover .nav__dropdown-menu,
.nav__dropdown--open .nav__dropdown-menu {
    display: block;
}

.nav__dropdown-menu a {
    display: block;
    padding: 10px 14px;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.nav__dropdown-menu a:hover {
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-primary);
}

/* 汉堡菜单 */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-dark);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.nav__toggle--open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__toggle--open span:nth-child(2) {
    opacity: 0;
}

.nav__toggle--open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* 移动端导航 */
.nav__mobile {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: var(--space-lg);
    overflow-y: auto;
    z-index: 999;
}

.nav__mobile--open {
    display: block;
}

.nav__mobile a {
    display: block;
    padding: var(--space-md);
    font-size: var(--font-size-lg);
    border-bottom: 1px solid var(--color-border);
}

/* ── Footer（深蓝夜色渐变 + 发光）── */
.footer {
    background: var(--gradient-night);
    color: rgba(255, 255, 255, 0.85);
    padding-top: var(--space-4xl);
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    width: 50vw;
    height: 50vw;
    bottom: -25vw;
    left: -10vw;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.22), transparent 60%);
    pointer-events: none;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1.5fr 1.5fr;
    gap: var(--space-2xl);
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    position: relative;
    z-index: 1;
}

.footer__brand {
    position: relative;
}

.footer__brand p {
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    line-height: 1.9;
    color: rgba(255, 255, 255, 0.7);
}

.footer__title {
    color: #fff;
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.footer__links a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    font-size: var(--font-size-sm);
    opacity: 0.78;
    transition: opacity var(--transition-fast), color var(--transition-fast);
}

.footer__links a:hover {
    opacity: 1;
    color: var(--color-accent);
}

.footer__links svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.8;
}

.footer__bottom {
    margin-top: var(--space-3xl);
    padding: var(--space-lg) var(--container-padding);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    text-align: center;
    font-size: var(--font-size-xs);
    opacity: 0.6;
    position: relative;
    z-index: 1;
}

/* ── 面包屑 ── */
.breadcrumb {
    padding: calc(var(--nav-height) + var(--space-md)) 0 var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.breadcrumb span {
    margin: 0 var(--space-xs);
}

/* ── 网格工具 ── */
.grid { display: grid; gap: var(--space-lg); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--6 { grid-template-columns: repeat(6, 1fr); }

/* ── 响应式 ── */
@media (max-width: 1024px) {
    .footer__grid {
        grid-template-columns: 1fr 1fr;
    }
    .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .grid--6 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .nav__links { display: none; }
    .nav__toggle { display: flex; }
    .footer__grid { grid-template-columns: 1fr; }
    .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
    .grid--6 { grid-template-columns: repeat(3, 1fr); }
}

/* ══ 全局移动端兜底 ══
   1) 内联 style 的固定 grid 无法被媒体查询覆盖，强制单列避免横向溢出
   2) 表格在窄屏横向滚动，避免挤压错位 */
@media (max-width: 768px) {
    [style*="grid-template-columns"] { grid-template-columns: 1fr !important; }
    .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .compare-table, table { width: 100%; }
}