/* ===== 基础变量（由主题文件覆盖） ===== */
:root {
    --color-primary: #e8f4e5;
    --color-accent: #2c1810;
    --color-highlight: #c23b22;
    --color-secondary: #4a90a4;
    --color-bg: #f5f9f5;
    --color-card: #ffffff;
    --color-border: #d0e4d0;
    --color-text: #2c1810;
    --color-text-muted: #666;
    --color-success: #4caf50;
    --color-warning: #ff9800;
    --color-error: #f44336;
    --font-heading: 'ZCOOL KuaiLe', 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', sans-serif;
    --radius: 12px;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --transition: 0.3s ease;
    --nav-height: 64px;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; }
button { cursor: pointer; font-family: inherit; }

/* ===== 导航栏 ===== */
.main-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-height);
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}
.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0 20px;
    gap: 14px;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.2rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--color-accent);
    white-space: nowrap;
}
.logo-icon { font-size: 1.5rem; }
.nav-links {
    display: flex;
    gap: 4px;
    flex: 1;
}
.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 9px;
    border-radius: 8px;
    font-size: 0.84rem;
    white-space: nowrap;
    color: var(--color-text-muted);
    transition: all var(--transition);
}
.nav-link:hover, .nav-link.active {
    background: var(--color-primary);
    color: var(--color-accent);
    font-weight: 600;
}
.nav-icon { font-size: 1rem; }
.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}
.nav-toggle { display: none; background: none; border: none; font-size: 1.4rem; }

/* ===== 语言切换 ===== */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--color-primary);
    border-radius: 20px;
    padding: 4px 10px;
}
.lang-btn {
    background: none;
    border: none;
    padding: 4px 8px;
    font-size: 0.82rem;
    border-radius: 14px;
    color: var(--color-text-muted);
    transition: all var(--transition);
}
.lang-btn.active {
    background: var(--color-card);
    color: var(--color-accent);
    font-weight: 700;
    box-shadow: 0 1px 4px rgba(0,0,0,0.12);
}
.lang-divider { color: var(--color-border); }

/* ===== 用户菜单 ===== */
.user-menu {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}
.user-avatar { font-size: 1.6rem; }
.user-name { font-size: 0.88rem; font-weight: 600; }
.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    min-width: 140px;
    display: none;
    flex-direction: column;
    overflow: hidden;
}
.user-menu:hover .user-dropdown { display: flex; }
.user-dropdown a {
    padding: 10px 16px;
    font-size: 0.9rem;
    transition: background var(--transition);
}
.user-dropdown a:hover { background: var(--color-primary); }

/* ===== 主内容区 ===== */
.main-content {
    margin-top: var(--nav-height);
    min-height: calc(100vh - var(--nav-height) - 80px);
}

/* ===== 页面容器 ===== */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 20px;
}
.page-header {
    margin-bottom: 28px;
}
.page-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--color-accent);
    margin-bottom: 6px;
}
.page-subtitle { color: var(--color-text-muted); font-size: 0.95rem; }

/* ===== 卡片 ===== */
.card {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
    padding: 24px;
    transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,0.12); }
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-accent);
}
.card-icon { font-size: 1.8rem; }

/* ===== 章节卡片 ===== */
.chapter-card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
}
.chapter-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-highlight), var(--color-secondary));
}
.chapter-progress-bar {
    width: 100%;
    height: 6px;
    background: var(--color-border);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 12px;
}
.chapter-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-highlight), var(--color-secondary));
    border-radius: 3px;
    transition: width 1s ease;
}

/* ===== 仪表盘网格 ===== */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}
.dashboard-grid .card-span-2 { grid-column: span 2; }
.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow);
}
.stat-value {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-highlight);
}
.stat-label { font-size: 0.82rem; color: var(--color-text-muted); margin-top: 4px; }
.stat-icon { font-size: 1.8rem; margin-bottom: 8px; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    transition: all var(--transition);
    cursor: pointer;
    font-family: var(--font-body);
}
.btn-primary {
    background: var(--color-highlight);
    color: #fff;
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-secondary {
    background: var(--color-secondary);
    color: #fff;
}
.btn-secondary:hover { filter: brightness(1.1); }
.btn-outline {
    background: transparent;
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
}
.btn-outline:hover { background: var(--color-accent); color: #fff; }
.btn-ghost { background: var(--color-primary); color: var(--color-accent); }
.btn-ghost:hover { background: var(--color-border); }
.btn-sm { padding: 6px 14px; font-size: 0.85rem; }
.btn-lg { padding: 14px 28px; font-size: 1.05rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ===== 进度条 ===== */
.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-highlight), var(--color-secondary));
    border-radius: 4px;
    transition: width 1s ease;
}

/* ===== 表单 ===== */
.form-group {
    margin-bottom: 20px;
}
.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.9rem;
    color: var(--color-accent);
}
.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: var(--font-body);
    background: var(--color-card);
    color: var(--color-text);
    transition: border-color var(--transition);
    outline: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--color-highlight);
    box-shadow: 0 0 0 3px rgba(194,59,34,0.1);
}
.form-error { color: var(--color-error); font-size: 0.82rem; margin-top: 4px; }
.form-success { color: var(--color-success); font-size: 0.82rem; margin-top: 4px; }

/* ===== 题目区 ===== */
.question-block {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
}
.question-number {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}
.question-content {
    font-size: 1.05rem;
    line-height: 1.9;
    margin-bottom: 24px;
}
.options-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.option-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 20px;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: 10px;
    font-size: 0.95rem;
    font-family: var(--font-body);
    cursor: pointer;
    text-align: left;
    transition: all var(--transition);
}
.option-btn:hover { border-color: var(--color-secondary); background: var(--color-primary); }
.option-btn.selected { border-color: var(--color-highlight); background: rgba(194,59,34,0.06); }
.option-btn.correct { border-color: var(--color-success); background: rgba(76,175,80,0.1); }
.option-btn.wrong { border-color: var(--color-error); background: rgba(244,67,54,0.08); }
.option-label {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

/* ===== 解析区 ===== */
.explanation-box {
    background: linear-gradient(135deg, var(--color-primary) 0%, rgba(255,255,255,0.8) 100%);
    border-left: 4px solid var(--color-secondary);
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 20px;
    margin-top: 20px;
    display: none;
}
.explanation-box.show { display: block; animation: fadeIn 0.3s ease; }
.explanation-title { font-weight: 700; color: var(--color-accent); margin-bottom: 8px; }

/* ===== 雷达图容器 ===== */
.radar-container {
    position: relative;
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
    aspect-ratio: 1;
}

/* ===== 连胜火焰 ===== */
.streak-display {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-highlight);
}
.streak-flame { font-size: 1.4rem; animation: flame 1s ease-in-out infinite alternate; }
@keyframes flame {
    from { transform: scale(1) rotate(-5deg); }
    to   { transform: scale(1.15) rotate(5deg); }
}

/* ===== 页脚 ===== */
.main-footer {
    background: var(--color-accent);
    color: rgba(255,255,255,0.8);
    padding: 28px 20px;
    margin-top: 48px;
}
.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}
.footer-brand {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.footer-tagline { font-size: 0.85rem; margin-bottom: 12px; }
.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 12px;
}
.footer-links a { font-size: 0.85rem; opacity: 0.8; }
.footer-links a:hover { opacity: 1; }
.footer-copy { font-size: 0.78rem; opacity: 0.6; }

/* ===== 动画 ===== */
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideIn { from { transform: translateX(-20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.animate-fade-in { animation: fadeIn 0.4s ease forwards; }
.animate-float { animation: float 3s ease-in-out infinite; }

/* ===== 花瓣/竹叶飘落 ===== */
.petal-canvas {
    position: fixed;
    top: 0; left: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.45;
}

/* ===== 徽章 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
}
.badge-easy { background: rgba(76,175,80,0.15); color: #388e3c; }
.badge-medium { background: rgba(255,152,0,0.15); color: #f57c00; }
.badge-hard { background: rgba(244,67,54,0.15); color: #d32f2f; }

/* ===== 章节章节网格 ===== */
.chapters-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.chapter-icon { font-size: 2.2rem; margin-bottom: 10px; }
.chapter-name {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 4px;
}
.chapter-desc { font-size: 0.82rem; color: var(--color-text-muted); margin-bottom: 12px; }
.chapter-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
    .dashboard-grid { grid-template-columns: 1fr 1fr; }
    .chapters-grid { grid-template-columns: 1fr 1fr; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
    .dashboard-grid .card-span-2 { grid-column: span 1; }
}
@media (max-width: 640px) {
    .nav-links { display: none; }
    .nav-links.open { display: flex; flex-direction: column; position: fixed; top: var(--nav-height); left: 0; right: 0; background: var(--color-card); padding: 16px; box-shadow: var(--shadow); }
    .nav-toggle { display: block; }
    .dashboard-grid, .chapters-grid { grid-template-columns: 1fr; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
    .page-container { padding: 16px; }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-highlight { color: var(--color-highlight); }
.text-accent { color: var(--color-accent); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.hidden { display: none !important; }
.w-full { width: 100%; }

/* ===== 2026 syllabus-aligned experience ===== */
.eju-kicker { color: var(--color-highlight); font-size: .76rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.course-switch { display: inline-flex; gap: 4px; padding: 4px; background: var(--color-primary); border: 1px solid var(--color-border); border-radius: 10px; }
.course-switch a { padding: 8px 14px; border-radius: 7px; color: var(--color-text-muted); font-size: .86rem; font-weight: 700; white-space: nowrap; }
.course-switch a.active { color: #fff; background: var(--color-accent); }
.curriculum-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; }
.curriculum-summary { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; margin-bottom: 30px; }
.curriculum-summary div { padding: 18px; background: var(--color-card); border: 1px solid var(--color-border); border-radius: 10px; }
.curriculum-summary b,.curriculum-summary span { display: block; }
.curriculum-summary b { color: var(--color-accent); font-size: 1.7rem; }
.curriculum-summary span { color: var(--color-text-muted); font-size: .82rem; }
.curriculum-part { margin-bottom: 34px; }
.curriculum-part-head { display: flex; align-items: end; justify-content: space-between; margin-bottom: 14px; border-bottom: 1px solid var(--color-border); padding-bottom: 10px; }
.curriculum-part-head span { color: var(--color-highlight); font-size: .74rem; font-weight: 700; letter-spacing: .08em; }
.curriculum-part-head h2 { font-size: 1.2rem; color: var(--color-accent); }
.curriculum-part-head small { color: var(--color-text-muted); }
.part-head-actions { display: flex; align-items: center; gap: 10px; }
.part-head-actions a { padding: 6px 9px; color: var(--color-highlight); background: var(--color-primary); border: 1px solid var(--color-border); border-radius: 7px; font-size: .75rem; font-weight: 700; }
.syllabus-chapter-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
.syllabus-chapter-card { cursor: default; display: flex; flex-direction: column; min-height: 320px; }
.chapter-card-top,.chapter-card-actions,.chapter-data { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.chapter-number { color: var(--color-text-muted); font-size: .72rem; font-weight: 700; }
.syllabus-chapter-card h3 { color: var(--color-accent); font-size: 1.02rem; }
.chapter-ja-name { color: var(--color-text-muted); font-size: .8rem; margin-top: 3px; }
.chapter-point-list { display: grid; gap: 5px; margin: 12px 0; flex: 1; }
.chapter-point-list li { position: relative; padding-left: 13px; color: var(--color-text-muted); font-size: .8rem; }
.chapter-point-list li::before { content: ''; position: absolute; left: 0; top: .58em; width: 5px; height: 5px; border-radius: 50%; background: var(--color-secondary); }
.chapter-data { color: var(--color-text-muted); font-size: .76rem; margin-bottom: 8px; }
.chapter-card-actions { margin-top: 10px; }
.chapter-card-actions > span { color: var(--color-highlight); font-weight: 700; }
.study-tool-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 28px; color: #fff; background: var(--color-accent); border-radius: 12px; }
.study-tool-band p { opacity: .82; }
.study-tool-links { display: flex; gap: 8px; flex-wrap: wrap; }
.study-tool-links a { padding: 9px 12px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.3); border-radius: 8px; }

.exam-spec-band { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; margin-bottom: 24px; padding: 22px; background: var(--color-accent); color: #fff; border-radius: 12px; }
.exam-spec-band div b,.exam-spec-band div span { display: block; }
.exam-spec-band div b { font-size: 1.25rem; }
.exam-spec-band div span { opacity: .75; font-size: .8rem; }
.exam-spec-band > p { grid-column: 1/-1; padding-top: 12px; border-top: 1px solid rgba(255,255,255,.2); opacity: .86; }
.syllabus-layout { display: grid; grid-template-columns: 230px minmax(0,1fr); gap: 22px; align-items: start; }
.syllabus-nav { position: sticky; top: 80px; padding: 12px; max-height: calc(100vh - 96px); overflow: auto; }
.syllabus-nav p { margin: 10px 8px 5px; color: var(--color-highlight); font-size: .7rem; font-weight: 700; }
.syllabus-nav a { display: flex; gap: 7px; padding: 8px; border-radius: 7px; color: var(--color-text-muted); font-size: .8rem; }
.syllabus-nav a.active { color: var(--color-accent); background: var(--color-primary); font-weight: 700; }
.syllabus-content { min-width: 0; }
.syllabus-title-block { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.syllabus-title-block > span { font-size: 2.5rem; }
.syllabus-title-block p,.syllabus-title-block small { color: var(--color-text-muted); font-size: .8rem; }
.syllabus-title-block h2 { color: var(--color-accent); }
.syllabus-title-block .btn { margin-left: auto; }
.syllabus-key-card,.syllabus-item { margin-bottom: 16px; }
.syllabus-key-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; margin-top: 12px; }
.syllabus-key-grid article { display: flex; gap: 10px; padding: 10px; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: 8px; }
.syllabus-key-grid b { color: var(--color-highlight); }
.syllabus-key-grid span { font-size: .86rem; }
.syllabus-item-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.syllabus-item-head > span { padding: 3px 7px; color: #fff; background: var(--color-highlight); border-radius: 5px; font-size: .72rem; }
.syllabus-item-head small { color: var(--color-text-muted); }
.syllabus-item > p { line-height: 1.8; }
.formula-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; margin-top: 14px; }
.formula-grid > div { padding: 10px; background: var(--color-primary); border: 1px solid var(--color-border); border-radius: 8px; text-align: center; overflow-x: auto; }

.dashboard-hero { display: grid; grid-template-columns: minmax(0,1.5fr) minmax(260px,.55fr); align-items: center; gap: 34px; min-height: 410px; margin-bottom: 18px; padding: 44px; color: #fff; background: linear-gradient(125deg,#173f35,#b93820); border-radius: 12px; }
.dashboard-hero h1 { max-width: 760px; margin: 6px 0 14px; font-size: 2.35rem; line-height: 1.22; }
.dashboard-hero p { max-width: 680px; opacity: .84; }
.dashboard-hero-actions { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; }
.dashboard-hero .btn-outline { color: #fff; border-color: rgba(255,255,255,.5); }
.exam-blueprint-mini { padding: 24px; background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.28); border-radius: 10px; }
.exam-blueprint-mini span,.exam-blueprint-mini b,.exam-blueprint-mini strong { display: block; }
.exam-blueprint-mini span { font-size: .72rem; letter-spacing: .1em; }
.exam-blueprint-mini b { margin: 10px 0; font-size: 2.8rem; }
.exam-blueprint-mini p { margin-top: 10px; }
.dashboard-stat-strip { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; margin-bottom: 38px; }
.dashboard-stat-strip a { padding: 16px; background: var(--color-card); border: 1px solid var(--color-border); border-radius: 10px; }
.dashboard-stat-strip b,.dashboard-stat-strip span { display: block; }
.dashboard-stat-strip b { color: var(--color-highlight); font-size: 1.45rem; }
.dashboard-stat-strip span { color: var(--color-text-muted); font-size: .8rem; }
.dashboard-section { margin-bottom: 38px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; margin-bottom: 14px; }
.section-heading h2 { color: var(--color-accent); }
.section-heading > a { color: var(--color-highlight); font-weight: 700; font-size: .84rem; }
.course-path-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.course-path-grid.single-course-path { grid-template-columns: minmax(0,1fr); }
.course-path { padding: 28px; background: var(--color-card); border: 1px solid var(--color-border); border-top: 5px solid var(--color-highlight); border-radius: 10px; }
.course-two { border-top-color: var(--color-secondary); }
.course-path-label { color: var(--color-text-muted); font-size: .75rem; font-weight: 700; }
.course-path h3 { margin: 5px 0 8px; color: var(--color-accent); font-size: 1.35rem; }
.course-path p { color: var(--color-text-muted); }
.course-metrics { display: flex; gap: 18px; margin: 18px 0; }
.course-metrics b { color: var(--color-highlight); }
.feature-route-grid { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); border: 1px solid var(--color-border); border-radius: 10px; overflow: hidden; }
.feature-route-grid a { min-height: 185px; padding: 22px; background: var(--color-card); border-right: 1px solid var(--color-border); }
.feature-route-grid a:last-child { border-right: 0; }
.feature-route-grid span { color: var(--color-highlight); font-size: .75rem; font-weight: 700; }
.feature-route-grid b { display: block; margin: 20px 0 6px; color: var(--color-accent); }
.feature-route-grid p { color: var(--color-text-muted); font-size: .84rem; }
.recommended-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; }
.recommended-grid > a { padding: 16px; background: var(--color-card); border: 1px solid var(--color-border); border-radius: 9px; }
.recommended-grid > a > div { display: flex; align-items: center; gap: 6px; }
.recommended-grid small { color: var(--color-text-muted); }
.recommended-grid em { margin-left: auto; color: var(--color-highlight); font-size: .7rem; font-style: normal; }
.recommended-grid p { margin-top: 10px; font-size: .84rem; line-height: 1.7; }
.guest-cta { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 28px; background: var(--color-primary); border: 1px solid var(--color-border); border-radius: 10px; }

.vocab-header { display: flex; align-items: end; justify-content: space-between; gap: 20px; }
.vocab-toolbar { display: grid; grid-template-columns: minmax(260px,1fr) auto auto; align-items: end; gap: 12px; margin-bottom: 26px; }
.vocab-toolbar label { font-size: .8rem; font-weight: 700; }
.vocab-toolbar span { color: var(--color-text-muted); font-size: .78rem; }
.vocab-group { margin-bottom: 30px; }
.vocab-group-head { display: flex; align-items: end; justify-content: space-between; margin-bottom: 10px; border-bottom: 1px solid var(--color-border); padding-bottom: 8px; }
.vocab-group-head h2 { color: var(--color-accent); font-size: 1.15rem; }
.vocab-group-head span { color: var(--color-text-muted); font-size: .8rem; }
.vocab-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; }
.vocab-card { padding: 18px; background: var(--color-card); border: 1px solid var(--color-border); border-radius: 10px; }
.vocab-term-line { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.vocab-term-line strong,.vocab-term-line span { display: block; }
.vocab-term-line strong { color: var(--color-accent); font-size: 1.12rem; }
.vocab-term-line span { color: var(--color-text-muted); font-size: .76rem; }
.vocab-card h3 { margin-top: 12px; font-size: .95rem; }
.vocab-card > p { color: var(--color-text-muted); font-size: .82rem; }
.vocab-ja-explanation { display: flex; align-items: flex-start; gap: 8px; margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--color-border); }
.vocab-ja-explanation span { flex: 1; font-family: 'Noto Sans JP',sans-serif; font-size: .8rem; }
.speak-button { display: grid; place-items: center; flex: 0 0 auto; width: 38px; height: 38px; background: var(--color-primary); border: 1px solid var(--color-border); border-radius: 8px; }
.speak-button.small { width: 32px; height: 32px; }
.speak-button.speaking { color: #fff; background: var(--color-highlight); }
.speak-button.loading { cursor: wait; opacity: .72; }
.speak-button.loading::after { content: ''; width: 15px; height: 15px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: tts-spin .7s linear infinite; }
.speak-button.loading { font-size: 0; }
.vocab-toolbar [data-japanese-tts-status][data-state="error"] { color: #b42318; font-weight: 700; }
.vocab-toolbar [data-japanese-tts-status][data-state="speaking"] { color: var(--color-highlight); font-weight: 700; }
@keyframes tts-spin { to { transform: rotate(360deg); } }

.auth-page-shell { max-width: 520px; padding-top: 42px; }
.auth-card { padding: 32px; }
.auth-card,.auth-heading > div,.math-tool-workspace { min-width: 0; }
.auth-card .form-input { max-width: 100%; }
.dashboard-home h1,.dashboard-home h2,.learning-page h1,.learning-page h2,.syllabus-page h1,.syllabus-page h2,.vocab-page h1,.vocab-page h2,.tools-page h1,.tools-page h2,.auth-card h1 { font-family: 'Noto Sans SC','Noto Sans JP',sans-serif; letter-spacing: 0; }
.auth-heading { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.auth-mark { display: grid; place-items: center; width: 62px; height: 62px; flex: 0 0 auto; color: #fff; background: var(--color-accent); border-radius: 10px; font-weight: 700; }
.auth-kicker { color: var(--color-highlight); font-size: .7rem; font-weight: 700; letter-spacing: .08em; }
.auth-heading h1 { color: var(--color-accent); font-size: 1.45rem; }
.auth-heading p:last-child { color: var(--color-text-muted); font-size: .82rem; }
.auth-message { margin-bottom: 16px; padding: 11px 13px; border-radius: 8px; font-size: .84rem; }
.auth-message.is-error { color: #a61b1b; background: #fff1f1; border: 1px solid #ffcaca; }
.verification-row { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:10px; align-items:start; }
.verification-row .form-group { margin-bottom:0; }
.verification-row .btn { height:44px; min-height:44px; align-self:start; margin-top:25px; }
.verification-hint { margin: -10px 0 18px; color: var(--color-text-muted); font-size: .78rem; }
.verification-hint[data-state="ok"] { color: var(--color-success); }
.verification-hint[data-state="error"] { color: var(--color-error); }
.auth-password-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.auth-switch { margin-top: 18px; text-align: center; color: var(--color-text-muted); font-size: .86rem; }
.auth-switch a { color: var(--color-highlight); font-weight: 700; }
.exam-start-grid { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 18px; align-items: start; }
.exam-start-main { padding: 30px; }
.exam-start-title { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.exam-start-title > span { display: grid; place-items: center; width: 56px; height: 56px; color: #fff; background: var(--color-accent); border-radius: 9px; font-weight: 700; }
.exam-start-title h2 { color: var(--color-accent); }
.exam-start-title p { color: var(--color-text-muted); font-size: .8rem; }
.exam-start-metrics { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 8px; margin-bottom: 20px; }
.exam-start-metrics div { padding: 12px; text-align: center; background: var(--color-bg); border: 1px solid var(--color-border); border-radius: 8px; }
.exam-start-metrics b,.exam-start-metrics span { display: block; }
.exam-start-metrics b { color: var(--color-highlight); font-size: 1.25rem; }
.exam-start-metrics span { color: var(--color-text-muted); font-size: .72rem; }
.exam-blueprint-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 9px; margin-bottom: 20px; }
.exam-blueprint-list article { padding: 13px; border: 1px solid var(--color-border); border-left: 4px solid var(--color-secondary); border-radius: 8px; }
.exam-blueprint-list b,.exam-blueprint-list span { display: block; }
.exam-blueprint-list p { margin: 3px 0; color: var(--color-text-muted); font-size: .82rem; }
.exam-blueprint-list span { color: var(--color-highlight); font-size: .72rem; }
.exam-start-side { display: grid; gap: 12px; }
.exam-start-side h3 { margin-bottom: 8px; color: var(--color-accent); }
.exam-start-side p,.exam-start-side li { color: var(--color-text-muted); font-size: .83rem; }
.exam-start-side ul { display: grid; gap: 7px; }
.exam-start-side li { position: relative; padding-left: 13px; }
.exam-start-side li::before { content: ''; position: absolute; left: 0; top: .6em; width: 5px; height: 5px; background: var(--color-highlight); border-radius: 50%; }
.tools-header { display: flex; align-items: end; justify-content: space-between; gap: 18px; }
.tool-anchor-nav { position: sticky; top: calc(var(--nav-height) + 8px); z-index: 50; display: flex; gap: 5px; margin-bottom: 24px; padding: 7px; overflow-x: auto; background: rgba(255,255,255,.92); border: 1px solid var(--color-border); border-radius: 10px; backdrop-filter: blur(10px); }
.tool-anchor-nav a { min-width: max-content; padding: 7px 11px; color: var(--color-text-muted); background: var(--color-bg); border-radius: 7px; font-size: .78rem; font-weight: 700; }
.math-tool { display: grid; grid-template-columns: minmax(220px,.42fr) minmax(0,1fr); gap: 22px; align-items: start; margin-bottom: 32px; scroll-margin-top: 130px; }
.math-tool-copy { position: sticky; top: 130px; padding: 12px 4px; }
.math-tool-copy > span { color: var(--color-highlight); font-size: .72rem; font-weight: 700; letter-spacing: .1em; }
.math-tool-copy h2 { margin: 5px 0 8px; color: var(--color-accent); font-size: 1.25rem; }
.math-tool-copy p { color: var(--color-text-muted); font-size: .86rem; }
.math-tool-workspace { min-width: 0; }
.tool-input-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; margin-bottom: 12px; }
.tool-input-grid.three { grid-template-columns: repeat(3,minmax(0,1fr)); }
.tool-input-grid label,.range-label { color: var(--color-accent); font-size: .8rem; font-weight: 700; }
.math-canvas { display: block; width: 100%; max-width: 520px; height: auto; margin: 14px auto; background: #fbfdfc; border: 1px solid var(--color-border); border-radius: 8px; }
.tool-result { display: grid; gap: 5px; margin-top: 12px; padding: 13px; background: var(--color-primary); border: 1px solid var(--color-border); border-radius: 8px; }
.tool-result b { color: var(--color-accent); }
.tool-result span,.tool-result li { color: var(--color-text-muted); font-size: .82rem; }
.tool-steps ol { margin: 6px 0 0 22px; }
.range-label { display: grid; grid-template-columns: auto minmax(120px,1fr) 52px; align-items: center; gap: 10px; }
.range-label output { color: var(--color-highlight); font-weight: 700; }

@media (max-width:1120px) {
    .nav-container { padding: 0 14px; }
    .nav-links { display: none; }
    .nav-links.open { display: flex; flex-direction: column; position: fixed; top: var(--nav-height); left: 0; right: 0; max-height: calc(100vh - var(--nav-height)); overflow: auto; padding: 12px; background: var(--color-card); border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow); }
    .nav-links.open .nav-link { width: 100%; padding: 11px 12px; }
    .nav-toggle { display: block; }
}
@media (max-width:780px) {
    .curriculum-header,.vocab-header { align-items: stretch; flex-direction: column; }
    .course-switch { width: 100%; }
    .course-switch a { flex: 1; text-align: center; }
    .curriculum-summary,.dashboard-stat-strip { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .syllabus-chapter-grid,.vocab-grid,.recommended-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .study-tool-band,.guest-cta { align-items: stretch; flex-direction: column; }
    .syllabus-layout { grid-template-columns: 1fr; }
    .syllabus-nav { position: static; display: flex; gap: 5px; overflow-x: auto; max-height: none; }
    .syllabus-nav p { display: none; }
    .syllabus-nav a { min-width: max-content; }
    .exam-spec-band,.feature-route-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .feature-route-grid a { border-right: 0; border-bottom: 1px solid var(--color-border); }
    .dashboard-hero { grid-template-columns: 1fr; padding: 28px; }
    .dashboard-hero h1 { font-size: 1.8rem; }
    .course-path-grid { grid-template-columns: 1fr; }
    .vocab-toolbar { grid-template-columns: 1fr auto; }
    .vocab-toolbar span { grid-column: 1/-1; }
    .exam-start-grid { grid-template-columns: 1fr; }
    .math-tool { grid-template-columns: 1fr; }
    .math-tool-copy { position: static; }
    .tools-header { align-items: stretch; flex-direction: column; }
}
@media (max-width:640px) {
    .logo-text { max-width: 118px; overflow: hidden; text-overflow: ellipsis; }
    .lang-switcher { display: none; }
    .nav-actions { flex: 0 0 auto; margin-left: auto; }
    .nav-toggle { width: 38px; height: 38px; color: var(--color-accent); background: var(--color-primary); border: 1px solid var(--color-border); border-radius: 8px; }
    .nav-actions > .btn { display: none; }
    .auth-page-shell { padding: 14px 12px 32px; }
    .auth-card { padding: 20px 16px; }
    .auth-heading { align-items: flex-start; }
    .auth-mark { width: 50px; height: 50px; }
    .verification-row,.auth-password-grid { grid-template-columns: 1fr; }
    .verification-row .btn { width:100%; margin:0 0 18px; }
    .syllabus-chapter-grid,.vocab-grid,.recommended-grid,.formula-grid,.syllabus-key-grid { grid-template-columns: 1fr; }
    .exam-spec-band { grid-template-columns: 1fr 1fr; padding: 16px; }
    .syllabus-title-block { align-items: flex-start; flex-wrap: wrap; }
    .syllabus-title-block .btn { width: 100%; margin-left: 0; }
    .feature-route-grid { grid-template-columns: 1fr; }
    .dashboard-hero { min-height: auto; padding: 24px 18px; }
    .dashboard-hero h1 { font-size: 1.55rem; }
    .dashboard-hero-actions .btn { width: 100%; }
    .vocab-toolbar { grid-template-columns: 1fr; }
    .vocab-toolbar .btn { width: 100%; }
    .exam-start-main { padding: 18px 14px; }
    .exam-start-metrics,.exam-blueprint-list { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .tool-input-grid,.tool-input-grid.three { grid-template-columns: 1fr; }
    .math-tool-workspace { padding: 16px 12px; }
    .auth-heading p:last-child { overflow-wrap: anywhere; }
}