/* ========================================
   XPASS - 导航栏完整样式（含汉堡菜单）
   ======================================== */

/* ========================================
   汉堡菜单按钮（默认隐藏）
   ======================================== */

.nav__hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 22px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    transition: var(--transition-fast);
}

.nav__hamburger-line {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
    transform-origin: center;
}

/* 汉堡菜单激活状态 */
.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(1) {
    transform: translateY(9.5px) rotate(45deg);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(3) {
    transform: translateY(-9.5px) rotate(-45deg);
}

/* ========================================
   导航链接样式增强
   ======================================== */

.nav__links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav__links a:not(.btn) {
    position: relative;
    white-space: nowrap;
}

/* CTA按钮样式 */
.btn--nav {
    padding: 10px 24px;
    font-size: 13px;
    margin-left: 8px;
}

/* 活动链接高亮 */
.nav__links a.is-active:not(.btn) {
    color: var(--primary);
}

.nav__links a.is-active:not(.btn)::after {
    width: 100%;
}

/* ========================================
   平板端优化 (768px - 1024px)
   ======================================== */

@media (max-width: 1024px) {
    .nav__links {
        gap: 24px;
    }

    .nav__links a:not(.btn) {
        font-size: 13px;
    }
}

/* ========================================
   移动端菜单 (< 768px)
   ======================================== */

@media (max-width: 768px) {

    /* 显示汉堡菜单按钮 */
    .nav__hamburger {
        display: flex;
    }

    /* 移动端导航链接容器 */
    .nav__links {
        display: flex !important;
        /* 强制显示 */
        position: fixed;
        top: 0;
        right: 0;
        width: 280px;
        max-width: 85vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.98);
        backdrop-filter: blur(30px);
        -webkit-backdrop-filter: blur(30px);
        border-left: 1px solid var(--border);
        padding: 80px 32px 32px;
        flex-direction: column;
        gap: 0;
        align-items: flex-start;
        transform: translateX(100%);
        transition: transform 0.4s var(--ease-smooth);
        overflow-y: auto;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
        z-index: 9999;
        /* 提高z-index确保在最上层 */
    }

    /* 菜单打开状态 */
    .nav__links.is-open {
        transform: translateX(0) !important;
        visibility: visible !important;
        opacity: 1 !important;
    }

    /* 移动端链接样式 */
    .nav__links a {
        width: 100%;
        padding: 16px 0;
        font-size: 16px;
        color: var(--text);
        border-bottom: 1px solid var(--border-light);
        transition: var(--transition-fast);
    }

    .nav__links a:last-child {
        border-bottom: none;
    }

    .nav__links a:not(.btn):hover {
        color: var(--primary);
        padding-left: 8px;
    }

    .nav__links a::after {
        display: none;
        /* 移动端不显示下划线动画 */
    }

    /* CTA按钮移动端样式 */
    .btn--nav {
        width: 100%;
        margin: 24px 0 0;
        padding: 16px 24px;
        font-size: 14px;
        text-align: center;
        border: none;
    }

    /* 菜单遮罩 */
    .nav__overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.8);
        backdrop-filter: blur(5px);
        -webkit-backdrop-filter: blur(5px);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: 9998;
        /* 略低于侧边栏 */
        pointer-events: none;
    }

    .nav__overlay.is-visible {
        visibility: visible !important;
        pointer-events: auto;
    }
}

/* ========================================
   小屏手机优化 (< 480px)
   ======================================== */

@media (max-width: 480px) {
    .nav__links {
        width: 100%;
        max-width: 100%;
        padding: 80px 24px 24px;
    }

    .nav__links a {
        font-size: 15px;
        padding: 14px 0;
    }
}

/* ========================================
   菜单动画增强
   ======================================== */

@media (max-width: 768px) {

    /* 链接依次出现动画 */
    .nav__links.is-open a {
        animation: slideInRight 0.4s var(--ease-smooth) backwards;
    }

    .nav__links.is-open a:nth-child(1) {
        animation-delay: 0.05s;
    }

    .nav__links.is-open a:nth-child(2) {
        animation-delay: 0.1s;
    }

    .nav__links.is-open a:nth-child(3) {
        animation-delay: 0.15s;
    }

    .nav__links.is-open a:nth-child(4) {
        animation-delay: 0.2s;
    }

    .nav__links.is-open a:nth-child(5) {
        animation-delay: 0.25s;
    }

    .nav__links.is-open a:nth-child(6) {
        animation-delay: 0.3s;
    }

    .nav__links.is-open a:nth-child(7) {
        animation-delay: 0.35s;
    }

    @keyframes slideInRight {
        from {
            opacity: 0;
            transform: translateX(30px);
        }

        to {
            opacity: 1;
            transform: translateX(0);
        }
    }
}

/* ========================================
   防止背景滚动
   ======================================== */

body.nav-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    body.nav-open {
        position: fixed;
        width: 100%;
    }
}

/* ========================================
   无障碍优化
   ======================================== */

.nav__hamburger:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 4px;
    border-radius: 4px;
}

.nav__links a:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ========================================
   触摸设备优化
   ======================================== */

@media (hover: none) and (pointer: coarse) {
    .nav__hamburger {
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .nav__links a {
        min-height: 56px;
        display: flex;
        align-items: center;
    }
}

/* ========================================
   横屏模式优化
   ======================================== */

@media (max-width: 768px) and (orientation: landscape) {
    .nav__links {
        padding: 60px 24px 24px;
    }

    .nav__links a {
        padding: 10px 0;
        font-size: 14px;
    }
}

/* ========================================
   暗色主题优化（默认）
   ======================================== */

@media (prefers-color-scheme: dark) {
    .nav__links {
        background: rgba(0, 0, 0, 0.99);
    }
}