* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif; color: #000000; background: linear-gradient(120deg, #DFFAF5, #E0F0FF); min-height: 100vh; overflow-x: hidden; }
.navbar { position: fixed; top: 0; width: 100%; background: rgba(255, 255, 255, 0.7); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid rgba(168, 210, 255, 0.3); z-index: 1000; transition: all 0.3s ease; }
.nav-container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; display: flex; justify-content: space-between; align-items: center; height: 60px; }
.logo { font-size: 1.5rem; font-weight: 600; color: #000000; }
.nav-menu { display: flex; list-style: none; gap: 2rem; align-items: center; }
.nav-item { padding: 0.5rem 1rem; cursor: pointer; font-weight: 500; position: relative; transition: all 0.3s ease; }
.nav-item:hover, .nav-item.active { color: #A8D2FF; transform: scale(1.05); }
.has-dropdown { position: relative; }
.dropdown { display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%); background: rgba(255, 255, 255, 0.9); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-radius: 16px; padding: 1rem; box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1); border: 1px solid rgba(168, 210, 255, 0.3); min-width: 400px; }
.has-dropdown:hover .dropdown { display: block; animation: fadeInDown 0.3s ease; }
.dropdown-weeks { display: flex; flex-direction: column; gap: 0.5rem; min-width: 280px; }
.week-btn { padding: 0.5rem 1rem; border: none; background: rgba(168, 210, 255, 0.1); border-radius: 20px; cursor: pointer; font-size: 0.9rem; font-weight: 500; transition: all 0.3s ease; }
.week-btn:hover, .week-btn.active { background: #A8D2FF; transform: scale(1.05); box-shadow: 0 4px 12px rgba(168, 210, 255, 0.4); }
.language-switch { display: flex; align-items: center; gap: 0.3rem; padding: 0.5rem 1rem; background: rgba(168, 210, 255, 0.1); border-radius: 20px; cursor: pointer; }
.lang-btn { font-weight: 600; transition: all 0.3s ease; opacity: 0.5; }
.lang-btn.active { opacity: 1; color: #A8D2FF; }
.lang-divider { opacity: 0.3; }
.main-content { padding-top: 100px; max-width: 1200px; margin: 0 auto; padding-left: 2rem; padding-right: 2rem; padding-bottom: 2rem; }
.page { display: none; animation: fadeIn 0.5s ease; }
.page.active { display: block; }
.page-title { font-size: 3rem; font-weight: 700; margin-bottom: 1rem; text-align: center; }
.title-divider { height: 2px; background: linear-gradient(90deg, transparent, rgba(168, 210, 255, 0.5), transparent); margin: 2rem auto; width: 60%; }
.progress-section { margin: 3rem 0; }
.progress-card { background: rgba(255, 255, 255, 0.7); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-radius: 20px; padding: 2rem; border: 1px solid rgba(168, 210, 255, 0.3); box-shadow: 0 8px 32px rgba(168, 210, 255, 0.2); display: flex; align-items: center; gap: 2rem; transition: all 0.3s ease; cursor: pointer; }
.progress-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(168, 210, 255, 0.3); }
.progress-label { font-size: 1.1rem; font-weight: 600; min-width: 100px; }
.progress-bar-container { flex: 1; height: 12px; background: rgba(255, 255, 255, 0.5); border-radius: 6px; overflow: hidden; position: relative; }
.progress-bar { height: 100%; width: 30%; background: linear-gradient(120deg, #A8D2FF, #C0E0FF); border-radius: 6px; position: relative; overflow: hidden; }
.progress-bar::after { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent); animation: shimmer 2s infinite; }
.progress-text { font-size: 1rem; font-weight: 500; min-width: 120px; text-align: right; }
.notification-section { margin: 2rem 0; }
.notification-bar { background: rgba(255, 255, 255, 0.7); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-radius: 16px; padding: 1rem; border: 1px solid rgba(168, 210, 255, 0.3); overflow: hidden; position: relative; height: 50px; }
.notification-content { display: flex; animation: scroll 20s linear infinite; white-space: nowrap; }
.notification-item { padding: 0 2rem; font-size: 0.95rem; cursor: pointer; transition: color 0.3s ease; }
.notification-item:hover { color: #A8D2FF; }
.notification-bar:hover .notification-content { animation-play-state: paused; }
.cards-section { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; margin-top: 3rem; }
.feature-card { background: rgba(255, 255, 255, 0.6); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-radius: 20px; padding: 2rem; border: 1px solid rgba(168, 210, 255, 0.3); box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08); transition: all 0.3s ease; cursor: pointer; text-align: center; }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(168, 210, 255, 0.3); background: rgba(255, 255, 255, 0.8); }
.card-icon { font-size: 3rem; margin-bottom: 1rem; }
.feature-card h3 { font-size: 1.3rem; margin-bottom: 0.5rem; font-weight: 600; }
.feature-card p { color: rgba(0, 0, 0, 0.7); font-size: 0.95rem; line-height: 1.6; }

/* 作业页样式 */
.homework-header { text-align: center; margin-bottom: 2rem; }
.week-badge { display: inline-block; background: linear-gradient(120deg, #A8D2FF, #C0E0FF); color: #000000; padding: 0.5rem 2rem; border-radius: 20px; font-weight: 600; margin-bottom: 1rem; }
.week-title { font-size: 2rem; font-weight: 600; margin-bottom: 1rem; }

/* 视图切换按钮样式 */
.view-toggle {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}
.view-btn {
    padding: 0.8rem 2rem;
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid rgba(168, 210, 255, 0.5);
    border-radius: 40px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}
.view-btn.active {
    background: linear-gradient(120deg, #A8D2FF, #C0E0FF);
    border-color: #A8D2FF;
    box-shadow: 0 4px 12px rgba(168, 210, 255, 0.4);
}
.view-btn:hover {
    transform: translateY(-2px);
}
.view-content {
    display: none;
}
.view-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* 最终版本内容样式 */
.final-version-content {
    background: rgba(255, 255, 255, 0.6);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid rgba(168, 210, 255, 0.2);
}
.final-version-content h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
    color: #333;
}
.final-version-content p {
    line-height: 1.8;
    color: rgba(0, 0, 0, 0.8);
    margin-bottom: 1rem;
}
.hardware-section {
    margin: 1.5rem 0;
    padding: 1rem;
    background: rgba(168, 210, 255, 0.1);
    border-radius: 16px;
}
.hardware-section h4 {
    margin-bottom: 0.8rem;
    color: #4a90b0;
}
.hardware-section h5 {
    margin: 0.8rem 0 0.3rem 0;
    color: #5a6b7a;
}

/* 图片辅助说明样式 */
.image-illustration {
    margin: 1rem auto;
    padding: 1.1rem;
    background: rgba(255, 255, 255, 0.88);
    border-radius: 18px;
    text-align: center;
    max-width: 980px;
    box-shadow: 0 10px 24px rgba(168, 210, 255, 0.18);
}
.image-illustration img {
    max-width: 100%;
    width: 100%;
    max-height: 520px;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: transform 0.3s ease;
    display: block;
    margin: 0 auto;
}
.image-illustration img:hover {
    transform: scale(1.02);
}
.image-illustration p {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: #666;
}
.image-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin: 1rem 0 0;
    justify-items: center;
    align-items: start;
}

/* 作业清单样式 */
.homework-checklist {
    margin-bottom: 2rem;
}
.homework-checklist h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}
.checklist {
    list-style: none;
}
.checklist-item {
    padding: 1rem;
    margin-bottom: 0.5rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 1px solid rgba(168, 210, 255, 0.2);
}
.checklist-item:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateX(4px);
}
.checklist-item.completed {
    opacity: 0.7;
    background: rgba(168, 210, 255, 0.15);
}
.checklist-item.completed .task-text {
    text-decoration: line-through;
}
.check-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(168, 210, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    flex-shrink: 0;
    color: #666;
}
.checklist-item.completed .check-icon {
    background: #A8D2FF;
    color: #fff;
}
.checklist-item.completed .check-icon::before {
    content: "✓";
}
.checklist-item:not(.completed) .check-icon::before {
    content: "○";
}
.task-text {
    flex: 1;
}

/* 制作过程内容样式 */
.process-content {
    background: rgba(255, 255, 255, 0.6);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid rgba(168, 210, 255, 0.2);
}
.process-content h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}
.process-content p {
    line-height: 1.8;
    color: rgba(0, 0, 0, 0.8);
    margin-bottom: 1rem;
}
.process-step {
    margin: 1rem 0;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 12px;
    border-left: 4px solid #A8D2FF;
}
.process-step h4 {
    margin-bottom: 0.5rem;
    color: #4a90b0;
}
.process-step img {
    max-width: 100%;
    width: 100%;
    max-height: 520px;
    object-fit: contain;
    border-radius: 12px;
    margin-top: 0.5rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.process-step .image-illustration {
    max-width: 920px;
    margin-left: auto;
    margin-right: auto;
}

.process-step .image-grid {
    justify-items: center;
    align-items: start;
    gap: 1rem;
    grid-template-columns: 1fr;
    max-width: 980px;
    margin: 0 auto;
}

.final-version-content .image-grid,
.final-version-content .image-illustration {
    max-width: 980px;
    margin-left: auto;
    margin-right: auto;
}

.final-version-content .image-grid {
    grid-template-columns: 1fr;
}

.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; margin-top: 3rem; }
.project-card { background: rgba(255, 255, 255, 0.6); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-radius: 20px; overflow: hidden; border: 1px solid rgba(168, 210, 255, 0.3); box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08); transition: all 0.3s ease; cursor: pointer; }
.project-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(168, 210, 255, 0.3); }
.project-image { height: 200px; background: linear-gradient(135deg, #A8D2FF, #C0E0FF); }
.project-card h3 { padding: 1.5rem 1.5rem 0.5rem; font-size: 1.2rem; }
.project-card p { padding: 0 1.5rem 1.5rem; color: rgba(0, 0, 0, 0.7); line-height: 1.6; }

.image-modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.9); backdrop-filter: blur(20px); z-index: 3000; align-items: center; justify-content: center; }
.image-modal.active { display: flex; animation: fadeIn 0.3s ease; }
.image-modal-content { max-width: 90%; max-height: 90%; position: relative; }
.image-modal-content img { max-width: 100%; max-height: 85vh; border-radius: 12px; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5); }
.modal-close { position: absolute; top: -40px; right: 0; font-size: 2.5rem; color: white; cursor: pointer; transition: all 0.3s ease; background: rgba(255, 255, 255, 0.2); width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.modal-close:hover { background: rgba(255, 255, 255, 0.3); transform: rotate(90deg); }

#team.page {
    width: 100%;
    padding: 80px 20px;
    background:
        radial-gradient(circle at top, rgba(255, 230, 245, 0.9), transparent 25%),
        radial-gradient(circle at right, rgba(225, 240, 255, 0.9), transparent 25%),
        linear-gradient(135deg, #fffafc 0%, #f5f8ff 45%, #fffefb 100%);
    border-radius: 28px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.8);
}

.team-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.team-title-wrap {
    text-align: center;
    margin-bottom: 48px;
}

.team-title-wrap .page-title {
    font-size: 42px;
    font-weight: 800;
    color: #2b3650;
    margin: 0 0 8px;
    letter-spacing: 2px;
    text-shadow: none;
}

.page-subtitle {
    font-size: 13px;
    color: #7c8bb0;
    letter-spacing: 4px;
    margin: 0 0 16px;
    text-transform: uppercase;
}

.title-line {
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, #f9a8d4, #8ec5ff, #a7f3d0);
    margin: 0 auto;
    border-radius: 3px;
}

.team-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    width: 100%;
}

.team-card {
    background: linear-gradient(145deg, #ffffff 0%, #fff8fd 45%, #f4f8ff 100%);
    border: 1px solid rgba(214, 224, 255, 0.85);
    border-radius: 24px;
    padding: 18px 20px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    text-align: left;
    gap: 16px;
    transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
    box-shadow: 0 12px 24px rgba(148, 163, 184, 0.14);
}

.team-card[data-navigate-to] {
    cursor: pointer;
}

.team-card:hover {
    transform: translateY(-6px);
    border-color: rgba(96, 165, 250, 0.55);
    box-shadow: 0 18px 30px rgba(244, 114, 182, 0.12), 0 10px 24px rgba(126, 167, 255, 0.12);
}

.card-avatar {
    position: relative;
    width: 72px;
    height: 72px;
    margin-bottom: 0;
    display: flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
}

.avatar-border {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: linear-gradient(135deg, #f9a8d4, #93c5fd, #86efac);
    animation: rotate 6s linear infinite;
    opacity: 0.9;
}

.avatar-icon {
    position: relative;
    width: 64px;
    height: 64px;
    background: linear-gradient(145deg, #ffffff, #eef4ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    z-index: 2;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08);
}

.member-name {
    font-size: 20px;
    font-weight: 700;
    color: #2f3b58;
    margin: 0 0 6px;
    letter-spacing: 0.5px;
}

.member-job {
    font-size: 14px;
    color: #687693;
    margin: 0;
    letter-spacing: 0.4px;
    line-height: 1.5;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 1024px) {
    .team-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    #team.page { padding: 56px 14px; border-radius: 18px; }
    .team-title-wrap .page-title { font-size: 30px; }
    .team-grid { grid-template-columns: 1fr; gap: 16px; }
    .team-card { padding: 18px 14px; }
}


.modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(10px); z-index: 2000; align-items: center; justify-content: center; }
.modal.active { display: flex; animation: fadeIn 0.3s ease; }
.modal-content { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(20px); border-radius: 20px; padding: 2rem; max-width: 400px; width: 90%; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2); }
.modal-content h3 { margin-bottom: 1rem; font-size: 1.5rem; }
.modal-content p { margin-bottom: 2rem; color: rgba(0, 0, 0, 0.7); }
.modal-actions { display: flex; gap: 1rem; }
.modal-btn { flex: 1; padding: 0.8rem; border: none; border-radius: 12px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: all 0.3s ease; }
.cancel-btn { background: rgba(168, 210, 255, 0.2); }
.cancel-btn:hover { background: rgba(168, 210, 255, 0.3); }
.confirm-btn { background: linear-gradient(120deg, #A8D2FF, #C0E0FF); }
.confirm-btn:hover { transform: scale(1.05); box-shadow: 0 8px 24px rgba(168, 210, 255, 0.4); }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInDown { from { opacity: 0; transform: translateX(-50%) translateY(-10px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }
@keyframes shimmer { 0% { left: -100%; } 100% { left: 100%; } }
@keyframes scroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
@keyframes pulse { 0%, 100% { opacity: 0.5; } 50% { opacity: 1; } }
@media (max-width: 768px) {
	    .nav-menu { gap: 1rem; font-size: 0.9rem; }
	    .page-title { font-size: 2rem; }
	    .progress-card { flex-direction: column; text-align: center; }
	    .progress-bar-container { width: 100%; }
	    .dropdown { min-width: 300px; }
	    .sandbox-hero h1 { font-size: 1.6rem; }
	    .interaction-flow { flex-direction: column; }
	    .flow-arrow { transform: rotate(90deg); }
	    .stage-summary { grid-template-columns: 1fr; }
}

/* ===== 沙盘系统项目展示样式 ===== */
.sandbox-project { max-width: 1100px; margin: 0 auto; }
.sandbox-hero { text-align: center; padding: 3rem 2rem; background: rgba(255,255,255,0.5); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-radius: 24px; border: 1px solid rgba(168,210,255,0.3); margin-bottom: 2rem; }
.sandbox-hero h1 { font-size: 2.4rem; font-weight: 700; margin-bottom: 0.5rem; background: linear-gradient(135deg, #6B9FD4, #4A7FB5); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.sandbox-hero .subtitle { font-size: 1.1rem; color: rgba(0,0,0,0.5); margin-bottom: 1.5rem; }
.sandbox-keywords { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem; }
.sandbox-keywords .kw-tag { padding: 0.4rem 1.2rem; background: rgba(168,210,255,0.15); border: 1px solid rgba(168,210,255,0.4); border-radius: 20px; font-size: 0.85rem; font-weight: 500; color: #4A7FB5; transition: all 0.3s; }
.sandbox-keywords .kw-tag:hover { background: rgba(168,210,255,0.3); transform: translateY(-2px); }
.sandbox-section { background: rgba(255,255,255,0.5); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-radius: 20px; padding: 2rem; border: 1px solid rgba(168,210,255,0.25); margin-bottom: 1.5rem; transition: all 0.3s; }
.sandbox-section:hover { box-shadow: 0 8px 32px rgba(168,210,255,0.15); }
.sandbox-section h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 1.2rem; display: flex; align-items: center; gap: 0.6rem; }
.sandbox-section h2 .sec-icon { font-size: 1.6rem; }
.sandbox-section h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.8rem; color: #4A7FB5; }
.sandbox-section p { line-height: 1.8; color: rgba(0,0,0,0.75); }
.goal-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.2rem; margin-top: 1rem; }
.goal-card { text-align: center; padding: 1.5rem; background: rgba(255,255,255,0.6); border-radius: 16px; border: 1px solid rgba(168,210,255,0.2); transition: all 0.3s; }
.goal-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(168,210,255,0.2); }
.goal-card .goal-icon { font-size: 2.2rem; margin-bottom: 0.6rem; }
.goal-card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.3rem; }
.goal-card p { font-size: 0.85rem; color: rgba(0,0,0,0.6); line-height: 1.5; }
.interaction-flow { display: flex; align-items: center; justify-content: center; gap: 0; margin: 2rem 0; flex-wrap: wrap; }
.flow-step { text-align: center; padding: 1.5rem 1.2rem; background: rgba(255,255,255,0.7); border-radius: 16px; min-width: 140px; border: 1px solid rgba(168,210,255,0.3); transition: all 0.3s; }
.flow-step:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(168,210,255,0.25); }
.flow-step .step-icon { font-size: 2rem; margin-bottom: 0.3rem; }
.flow-step .step-title { font-weight: 700; font-size: 1rem; }
.flow-step .step-desc { font-size: 0.8rem; color: rgba(0,0,0,0.5); margin-top: 0.3rem; }
.flow-arrow { font-size: 1.8rem; margin: 0 0.5rem; color: #A8D2FF; font-weight: 700; }
.flow-principle { text-align: center; margin-top: 1rem; padding: 1rem; background: rgba(168,210,255,0.1); border-radius: 12px; font-size: 0.9rem; color: #4A7FB5; line-height: 1.8; }
.layer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.2rem; }
.layer-card { padding: 1.5rem; background: rgba(255,255,255,0.6); border-radius: 16px; border: 1px solid rgba(168,210,255,0.2); transition: all 0.3s; border-left: 3px solid #A8D2FF; }
.layer-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(168,210,255,0.2); }
.layer-card .layer-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.layer-card h4 { font-weight: 700; margin-bottom: 0.5rem; font-size: 1rem; }

/* ===== Week 3: CAD 小车建模样式 ===== */
.editable-note {
    margin: 0 0 1rem 0;
    padding: 0.8rem 1rem;
    border-radius: 10px;
    background: rgba(168, 210, 255, 0.16);
    border: 1px dashed rgba(74, 144, 176, 0.45);
    color: #4a90b0;
    font-size: 0.9rem;
}

.version-block {
    margin: 1.2rem 0 1.8rem 0;
    padding: 1rem;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid rgba(168, 210, 255, 0.25);
}

.version-block h5 {
    margin-bottom: 0.6rem;
    color: #4a90b0;
    font-size: 1.05rem;
}

.version-block p {
    margin-bottom: 1rem;
}

.stage-note {
    margin: 0.8rem 0 1rem;
    padding: 0.9rem 1rem;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(168, 210, 255, 0.12), rgba(255, 255, 255, 0.75));
    border: 1px solid rgba(168, 210, 255, 0.25);
}

.stage-chip {
    display: inline-block;
    margin-bottom: 0.45rem;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    background: rgba(168, 210, 255, 0.25);
    color: #4a7fb5;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.stage-note ul {
    margin-left: 1rem;
    color: rgba(0, 0, 0, 0.72);
    font-size: 0.92rem;
    line-height: 1.6;
}

.version-layout {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    align-items: start;
}

.version-column {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    background: rgba(255, 255, 255, 0.72);
    border-radius: 12px;
    padding: 0.8rem;
    border: 1px solid rgba(168, 210, 255, 0.2);
}

.version-column h6 {
    margin: 0.2rem 0 0.8rem 0;
    color: #5a6b7a;
    font-size: 0.95rem;
}

.version-column .image-grid {
    grid-template-columns: 1fr;
    gap: 0.8rem;
    margin: 0;
    width: 100%;
    max-width: 980px;
}

@media (max-width: 768px) {
    .version-layout {
        grid-template-columns: 1fr;
    }

    .version-column .image-grid {
        grid-template-columns: 1fr;
    }
}
.layer-card p { font-size: 0.85rem; color: rgba(0,0,0,0.6); line-height: 1.6; }
.layer-card .layer-detail { margin-top: 0.8rem; font-size: 0.8rem; color: rgba(0,0,0,0.5); }
.layer-card .layer-detail span { display: inline-block; background: rgba(168,210,255,0.15); padding: 0.2rem 0.7rem; border-radius: 10px; margin: 0.15rem; }
.module-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; }
.module-card { padding: 1.2rem; background: rgba(255,255,255,0.6); border-radius: 14px; border: 1px solid rgba(168,210,255,0.2); transition: all 0.3s; display: flex; gap: 1rem; align-items: flex-start; }
.module-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(168,210,255,0.2); }
.module-card .mod-icon { font-size: 1.8rem; flex-shrink: 0; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; background: rgba(168,210,255,0.12); border-radius: 12px; }
.module-card .mod-info h4 { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.2rem; }
.module-card .mod-info .mod-type { font-size: 0.75rem; color: #A8D2FF; font-weight: 600; margin-bottom: 0.3rem; }
.module-card .mod-info p { font-size: 0.8rem; color: rgba(0,0,0,0.55); line-height: 1.5; }
.experiment-card { background: rgba(255,255,255,0.6); border-radius: 16px; padding: 1.5rem; border: 1px solid rgba(168,210,255,0.25); margin-bottom: 1.2rem; transition: all 0.3s; }
.experiment-card:hover { box-shadow: 0 8px 24px rgba(168,210,255,0.15); }
.experiment-card .exp-header { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 1rem; }
.experiment-card .exp-num { width: 36px; height: 36px; background: linear-gradient(135deg, #A8D2FF, #C0E0FF); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1rem; flex-shrink: 0; }
.experiment-card h4 { font-weight: 700; }
.interaction-table { width: 100%; border-collapse: collapse; margin-top: 1rem; font-size: 0.85rem; border-radius: 12px; overflow: hidden; }
.interaction-table th { background: rgba(168,210,255,0.2); padding: 0.7rem 1rem; text-align: left; font-weight: 600; }
.interaction-table td { padding: 0.7rem 1rem; border-bottom: 1px solid rgba(168,210,255,0.15); background: rgba(255,255,255,0.4); }
.interaction-table tr:hover td { background: rgba(168,210,255,0.08); }
.innovation-list { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 0.8rem; }
.innovation-list li { padding: 1rem 1.2rem; background: rgba(255,255,255,0.6); border-radius: 12px; border: 1px solid rgba(168,210,255,0.2); font-size: 0.9rem; line-height: 1.6; display: flex; align-items: flex-start; gap: 0.6rem; transition: all 0.3s; }
.innovation-list li:hover { transform: translateX(4px); box-shadow: 0 4px 16px rgba(168,210,255,0.15); }
.innovation-list li .inno-icon { flex-shrink: 0; font-size: 1.2rem; }
.stage-summary { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1rem; }
.stage-summary .stage-done, .stage-summary .stage-next { padding: 1.2rem; border-radius: 14px; }
.stage-done { background: rgba(168,210,255,0.1); border: 1px solid rgba(168,210,255,0.3); }
.stage-next { background: rgba(192,224,255,0.1); border: 1px solid rgba(192,224,255,0.3); }
.stage-summary h4 { font-weight: 700; margin-bottom: 0.8rem; }
.stage-summary ul { list-style: none; font-size: 0.85rem; line-height: 2; color: rgba(0,0,0,0.7); }
.stage-summary ul li::before { content: '• '; color: #A8D2FF; font-weight: 700; }