body,
html {
    margin: 0;
    padding: 0;
    background-color: #f4ecd8;
    font-family: "Helvetica Neue", Helvetica, Arial, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Serif SC", STSong, serif;
    color: #4a3b32;
    overflow-x: hidden;
}

.global-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 80px;
    background: rgba(244, 236, 216, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #d4c4b7;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 50px;
    box-sizing: border-box;
    z-index: 9999;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}

.nav-left {
    display: flex;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 15px;
    transition: transform 0.3s ease;
}

.logo-link:hover {
    transform: scale(1.02);
}

.nav-logo {
    height: 60px;
    width: auto;
    object-fit: contain;
    border-radius: 4px;
    filter: drop-shadow(2px 2px 4px rgba(0, 0, 0, 0.15));
}

.nav-brand {
    font-size: 1.4rem;
    font-weight: bold;
    color: #8b2b2b;
    letter-spacing: 3px;
    font-family: "Noto Serif SC", STSong, serif;
}

.nav-right {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-item {
    text-decoration: none;
    color: #4a3b32;
    font-size: 1.05rem;
    font-weight: bold;
    letter-spacing: 2px;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    padding: 8px 18px;
    border-radius: 6px;
    overflow: hidden;
    font-family: "Noto Serif SC", STSong, serif;
}

.nav-item:hover {
    color: #f9f6ef;
    background-color: #a84b4b;
    transform: scale(1.05);
}

.nav-petal {
    position: absolute;
    width: 6px;
    height: 6px;
    background: #ffcce5;
    border-radius: 10px 0 10px 0;
    pointer-events: none;
    z-index: 10;
}

.bg-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
}

.bg-layer {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.5;
}

/* 浮动介绍语 */
.fixed-intro {
    position: fixed;
    top: 50%;
    left: 80px;
    transform: translateY(-50%);
    width: 320px;
    z-index: 5;
    background: rgba(244, 236, 216, 0.65);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid rgba(212, 196, 183, 0.6);
    backdrop-filter: blur(8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.fixed-intro h2 {
    color: #8b2b2b;
    font-size: 1.6rem;
    margin-top: 0;
    margin-bottom: 15px;
    letter-spacing: 1px;
}

.fixed-intro p {
    font-size: 1rem;
    line-height: 1.7;
    color: #4a3b32;
    text-align: justify;
    margin-bottom: 25px;
}

.scroll-hint {
    font-weight: bold;
    color: #a84b4b;
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.horizontal-container {
    width: 100vw;
    height: 100vh;
    position: relative;
    z-index: 10;
}

.scroll-wrapper {
    display: flex;
    height: 100%;
    width: max-content;
}

.spacer-section {
    width: 450px;
    height: 100vh;
    flex-shrink: 0;
}

.pair-section {
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    padding: 80px 40px 30px 40px;
    box-sizing: border-box;
}

/* 团队侧边立柱卡片 - 增加高度至 600px */
.team-card-frame {
    width: 240px;
    height: 600px;
    background: linear-gradient(135deg, rgba(250, 246, 235, 0.85), rgba(244, 236, 216, 0.75));
    border: 1px solid rgba(139, 43, 43, 0.4);
    border-radius: 120px 120px 12px 12px;
    padding: 12px;
    box-sizing: border-box;
    box-shadow: 0 12px 30px rgba(139, 43, 43, 0.08);
    position: relative;
    backdrop-filter: blur(10px);
}

.frame-inner {
    width: 100%;
    height: 100%;
    border: 1px dashed rgba(212, 196, 183, 0.8);
    border-radius: 110px 110px 6px 6px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-sizing: border-box;
    text-align: center;
}

.location-tag {
    font-size: 0.85rem;
    color: #8b2b2b;
    border: 1px solid #8b2b2b;
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 25px;
    font-weight: bold;
    text-transform: uppercase;
}

.team-card-frame h2 {
    color: #8b2b2b;
    margin: 0 0 15px 0;
    font-size: 1.5rem;
    letter-spacing: 2px;
}

.project-title {
    color: #4a3b32;
    font-size: 1.2rem;
    font-weight: bold;
    margin: 0 0 10px 0;
}

.project-sub {
    color: #6d594f;
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.5;
}

/* 中间核心窗户卡片 - 高级微透视效果，同步高度至 600px */
.window-card {
    width: 700px;
    height: 600px;
    perspective: 1500px;
}

.window-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transition: transform 0.8s cubic-bezier(0.4, 0.2, 0.2, 1);
    transform-style: preserve-3d;
}

.window-card.is-open .window-inner {
    transform: rotateY(180deg);
}

/* 微调窗户内部的上下边距 */
.window-front,
.window-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    background: rgba(255, 255, 255, 0.45);
    border: 1px solid rgba(212, 196, 183, 0.6);
    border-radius: 12px;
    padding: 30px 40px;
    box-sizing: border-box;
    backdrop-filter: blur(12px);
    box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.5), 0 15px 35px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
}

.window-back {
    transform: rotateY(180deg);
    background: rgba(244, 236, 216, 0.75);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(139, 43, 43, 0.3);
    padding-bottom: 15px;
    margin-bottom: 30px;
}

.card-header h3 {
    margin: 0;
    color: #8b2b2b;
    font-size: 1.4rem;
    letter-spacing: 2px;
    font-family: "Noto Serif SC", STSong, serif;
}

.pair-badge {
    background: #8b2b2b;
    color: #f9f6ef;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
    letter-spacing: 1px;
}

.content-block {
    margin-bottom: 30px;
}

.content-block h4,
.insight-block h4 {
    margin: 0 0 12px 0;
    color: #8b2b2b;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.content-block h4::before,
.insight-block h4::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    background-color: #8b2b2b;
    transform: rotate(45deg);
    opacity: 0.7;
}

.content-block p,
.insight-block p {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.7;
    color: #4a3b32;
    text-align: justify;
}

.insight-block {
    background: rgba(255, 255, 255, 0.3);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid rgba(212, 196, 183, 0.4);
}

.insight-block p {
    font-style: italic;
}

.btn-push-window,
.btn-switch-view {
    margin-top: auto;
    align-self: center;
    background: transparent;
    border: 1px solid #8b2b2b;
    color: #8b2b2b;
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: bold;
    letter-spacing: 1px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
}

.btn-push-window:hover,
.btn-switch-view:hover {
    background: #8b2b2b;
    color: #f9f6ef;
}

/* ================= 高阶下拉菜单样式 ================= */
.dropdown {
    position: relative;
    display: flex;
    align-items: center;
    height: 100%;
}

.dropdown .nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 纯 CSS 绘制精美小箭头 */
.dropdown-arrow {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    transition: transform 0.3s ease;
}

.dropdown:hover .dropdown-arrow {
    transform: rotate(225deg) translate(-2px, -2px);
}

.dropdown-content {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background-color: rgba(250, 246, 235, 0.95);
    min-width: 240px;
    box-shadow: 0px 15px 35px rgba(0, 0, 0, 0.12);
    z-index: 999;
    border-radius: 8px;
    border: 1px solid #d4c4b7;
    backdrop-filter: blur(12px);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.dropdown:hover .dropdown-content {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.dropdown-content a {
    color: #4a3b32 !important;
    text-decoration: none !important;
    padding: 16px 20px;
    display: block;
    font-size: 0.95rem;
    font-weight: bold;
    text-align: center;
    transition: all 0.3s ease;
    border-bottom: 1px dashed rgba(212, 196, 183, 0.6);
}

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

.dropdown-content a:hover {
    background-color: #8b2b2b;
    color: #f9f6ef !important;
    letter-spacing: 0.5px;
}

/* ================= 全局导航栏移动端适配 ================= */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 10001;
    /* 确保按钮在最上层 */
}

.hamburger span {
    width: 28px;
    height: 3px;
    background-color: #8b2b2b;
    border-radius: 3px;
    transition: all 0.3s ease;
}

@media (max-width: 900px) {
    .global-nav {
        padding: 0 20px;
    }

    .hamburger {
        display: flex;
    }

    .nav-right {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100vw;
        height: 0;
        overflow: hidden;
        flex-direction: column;
        background: rgba(250, 246, 235, 0.98);
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
        gap: 0;
        transition: height 0.4s ease;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        align-items: center;
    }

    /* 展开后的菜单 */
    .nav-right.is-active {
        height: 360px;
        padding: 10px 0;
    }

    .nav-item {
        width: 100%;
        text-align: center;
        padding: 15px 0;
        border-radius: 0;
    }

    .dropdown {
        width: 100%;
        flex-direction: column;
        height: auto;
    }

    .dropdown .nav-item {
        justify-content: center;
    }

    /* 移动端下拉菜单改为点击展开，非悬浮 */
    .dropdown-content {
        position: relative;
        top: 0;
        left: 0;
        transform: none;
        width: 100%;
        min-width: unset;
        box-shadow: none;
        border: none;
        background: rgba(139, 43, 43, 0.05);
        display: none;
        /* 默认隐藏 */
        opacity: 1;
        visibility: visible;
        border-radius: 0;
    }

    .dropdown-content.is-expanded {
        display: block;
    }

    .dropdown-content a {
        padding: 12px 20px;
        border-bottom: 1px solid rgba(212, 196, 183, 0.3);
    }

    /* 汉堡按钮变成叉号动画 */
    .hamburger.is-active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .hamburger.is-active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.is-active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }
}

/* ================= 借景相望 移动端适配 (终极修复版) ================= */
@media (max-width: 900px) {
    .fixed-intro {
        display: none;
    }

    /* 隐藏左下角固定提示语 */

    .intro-box {
        padding: 30px 20px;
        width: 90%;
    }

    .intro-box h2 {
        font-size: 2rem;
    }

    .intro-box p {
        font-size: 1.1rem;
    }

    /* 解除横向滚动，改为垂直堆叠 */
    .horizontal-container {
        overflow-x: hidden;
        overflow-y: auto;
        scroll-snap-type: y mandatory;
    }

    .scroll-wrapper {
        flex-direction: column;
        width: 100vw;
        height: auto;
    }

    /* 每一组变成上下排列，增加间距和上下 padding */
    .pair-section {
        flex-direction: column;
        justify-content: center;
        height: auto;
        min-height: 100vh;
        padding: 110px 20px 60px;
        gap: 25px;
        scroll-snap-align: start;
    }

    /* 核心修复 1：强制重置左右团队卡片的半圆形状，统一变成圆角矩形 */
    .team-card-frame {
        width: 100%;
        max-width: 350px;
        height: auto;
        min-height: 140px;
        border-radius: 12px !important;
        border: 1px solid #d4c4b7 !important;
        padding: 15px;
        display: flex;
        align-items: center;
        justify-content: center;
        box-sizing: border-box;
    }

    /* 重置内部虚线框的形状 */
    .frame-inner {
        border-radius: 8px !important;
        width: 100%;
        height: auto;
        padding: 20px 10px;
        border: 1px dashed rgba(139, 43, 43, 0.4) !important;
        box-sizing: border-box;
    }

    /* 核心修复 2：增加中间窗户卡片的固定高度，给文字足够的呼吸空间 */
    .window-card {
        width: 100%;
        max-width: 350px;
        height: 520px;
        /* 增加高度，防止英文长文本溢出 */
    }

    .window-inner {
        height: 100%;
    }

    /* 调整内部文本排版，稍微缩小字号适应手机屏 */
    .window-front,
    .window-back {
        padding: 25px 20px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .content-block {
        margin-bottom: 15px;
    }

    .content-block h4 {
        font-size: 0.95rem;
        margin-bottom: 8px;
    }

    .content-block p {
        font-size: 0.9rem;
        line-height: 1.6;
    }

    .insight-block p {
        font-size: 0.9rem;
        line-height: 1.6;
    }
}