:root {
    --primary-color: #4a90e2;
    --primary-hover: #357abd;
    --bg-color: #f0f2f5;
    --card-bg: #ffffff;
    --text-main: #2c3e50;
    --text-secondary: #7f8c8d;
    --border-color: #e1e4e8;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Tag Colors */
    --tag-safe-super-bg: #d4edda; --tag-safe-super-text: #155724;
    --tag-safe-bg: #c3e6cb; --tag-safe-text: #155724;
    --tag-stable-bg: #fff3cd; --tag-stable-text: #856404;
    --tag-risk-bg: #ffeeba; --tag-risk-text: #856404;
    --tag-hard-bg: #f8d7da; --tag-hard-text: #721c24;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

header {
    text-align: center;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

h1 {
    margin: 0;
    color: var(--text-main);
    font-size: 2rem;
    font-weight: 700;
}

.subtitle {
    color: var(--text-secondary);
    margin-top: 10px;
    font-size: 1rem;
}

/* Controls Section */
.controls {
    background: #f8f9fa;
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    margin-bottom: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    align-items: end;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-main);
}

.radio-group {
    display: flex;
    gap: 20px;
    background: white;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.radio-group label {
    font-weight: normal;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
}

input[type="number"], input[type="file"] {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
    box-sizing: border-box;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* Fix Autofill Background Color */
input:-webkit-autofill,
input:-webkit-autofill:hover, 
input:-webkit-autofill:focus, 
input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 30px var(--card-bg) inset !important;
    -webkit-text-fill-color: var(--text-main) !important;
    transition: background-color 5000s ease-in-out 0s;
}

button {
    padding: 12px 30px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s;
    width: 100%;
}

button:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

button:active:not(:disabled) {
    transform: translateY(0);
}

button:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
    opacity: 0.7;
}

.btn-secondary {
    background-color: white;
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: #f8f9fa;
    border-color: #b0b3b8;
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

/* Status & Stats */
.status-bar {
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.status-msg {
    font-size: 0.95rem;
    padding: 8px 12px;
    border-radius: var(--radius-md);
    display: inline-block;
}
.status-success { background-color: #e8f5e9; color: #2e7d32; }
.status-error { background-color: #ffebee; color: #c62828; }
.status-info { background-color: #e3f2fd; color: #1565c0; }

/* Result Table */
.result-container {
    overflow: auto;
    max-height: 75vh; /* 设置最大高度，超过此高度将出现滚动条 */
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    position: relative;
}

table {
    width: 100%;
    border-collapse: separate; /* sticky需要separate或者collapse下特定处理，但chrome下collapse也行，保留collapse往往有边框合并问题，先试着保持默认 */
    border-collapse: collapse; 
    font-size: 0.95rem;
    min-width: 1000px;
}

th, td {
    padding: 10px 8px; /* 减少内边距 */
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th:first-child, td:first-child {
    padding-left: 20px;
}

th {
    background-color: #f8f9fa; /* 必须有背景色，否则滚动时内容会透出来 */
    font-weight: 600;
    color: var(--text-main);
    position: sticky;
    top: 0;
    z-index: 10; /* 确保在内容之上 */
    user-select: none;
    cursor: default;
    white-space: nowrap; /* 强制不换行 */
    font-size: 0.85rem; /* 减小表头字体 */
}

th:hover {
    background-color: #e9ecef;
}

tr:last-child td {
    border-bottom: none;
}

/* 斑马纹效果，增强行间区分 */
tbody tr:nth-child(even) {
    background-color: #fafbfc;
}

tr:hover {
    background-color: #eef2f7 !important; /* Hover时颜色加深，并覆盖斑马纹 */
}

/* Tags */
.tag {
    padding: 6px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
    white-space: nowrap;
}
.tag-safe-super { background-color: var(--tag-safe-super-bg); color: var(--tag-safe-super-text); }
.tag-safe { background-color: var(--tag-safe-bg); color: var(--tag-safe-text); }
.tag-stable { background-color: var(--tag-stable-bg); color: var(--tag-stable-text); }
.tag-risk { background-color: var(--tag-risk-bg); color: var(--tag-risk-text); }
.tag-hard { background-color: var(--tag-hard-bg); color: var(--tag-hard-text); }

.diff-pos { color: #27ae60; font-weight: 600; }
.diff-neg { color: #c0392b; font-weight: 600; }

/* Helpers */
.hidden { display: none !important; }
.text-muted { color: var(--text-secondary); font-size: 0.9em; }

.score-hint {
    margin-bottom: 20px;
    padding: 15px;
    background: #e1f5fe;
    border-left: 4px solid #039be5;
    border-radius: 4px;
    color: #01579b;
}

.tag-school {
    background-color: #e3f2fd;
    color: #1565c0;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid #bbdefb;
    font-weight: 600;
}

.tag-school-public {
    background-color: #e3f2fd;
    color: #1565c0;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid #bbdefb;
    font-weight: 600;
    margin-right: 4px;
}

.tag-school-private {
    background-color: #fff3e0;
    color: #ef6c00;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid #ffe0b2;
    font-weight: 600;
    margin-right: 4px;
}

.full-width { grid-column: 1 / -1; }

/* ===== Quick scroll nav (bottom-right) ===== */
.scroll-nav {
    position: fixed;
    right: 24px;
    bottom: 110px; /* 抬高，避开底部居中的悬浮搜索栏 */
    z-index: 998;
    display: flex;
    flex-direction: column;
    gap: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
}
.scroll-nav.is-visible {
    opacity: 0.85;
    visibility: visible;
    transform: translateY(0);
}
.scroll-nav:hover { opacity: 1; }
.scroll-nav__btn {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}
.scroll-nav__btn:hover:not(:disabled) {
    background: var(--primary-color);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(74,144,226,0.35);
}
.scroll-nav__btn:active:not(:disabled) { transform: translateY(0); }

/* Search Bar Styles */
.search-container {
    display: none; 
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 999;
    
    flex-direction: row; 
    align-items: center; 
    gap: 8px; 
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
    padding: 10px 20px; 
    border-radius: 50px; 
    border: 1px solid rgba(0,0,0,0.1);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
    min-width: 350px;
    
    opacity: 0.3;
    transition: transform 0.3s, box-shadow 0.3s, opacity 0.3s, border-color 0.3s;
}

.search-container:hover {
    opacity: 1;
}

.search-container:focus-within {
    opacity: 1;
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    border-color: var(--primary-color);
    transform: translateX(-50%) translateY(-2px);
}

.search-input {
    border: none !important;
    outline: none !important;
    background: transparent;
    padding: 5px;
    font-size: 0.95rem;
    flex: 1;
    box-shadow: none !important;
    min-width: 100px;
}

/* Custom Select Styles */
.custom-select-wrapper {
    position: relative;
    user-select: none;
    min-width: 90px;
}

.custom-select-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5px;
    font-size: 0.85rem;
    color: var(--text-main);
    cursor: pointer;
    height: 32px;
}

.custom-select-trigger .arrow {
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid #95a5a6;
    margin-left: 5px;
    transition: transform 0.3s;
}

.custom-select-wrapper.open .custom-select-trigger .arrow {
    transform: rotate(180deg);
}

.custom-options {
    position: absolute;
    bottom: calc(100% + 15px);
    left: 50%;
    transform: translateX(-50%);
    background: white;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
    border: 1px solid rgba(0,0,0,0.05);
    min-width: 120px;
    padding: 6px;
    display: none;
    z-index: 1000;
}

.custom-select-wrapper.open .custom-options {
    display: block;
    animation: fadeInSlideUp 0.2s ease-out;
}

@keyframes fadeInSlideUp {
    from { opacity: 0; transform: translate(-50%, 10px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

.custom-option {
    padding: 8px 12px;
    font-size: 0.85rem;
    color: var(--text-main);
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.2s, color 0.2s;
    text-align: center;
    white-space: nowrap;
}

.custom-option:hover {
    background-color: #f1f3f5;
    color: var(--primary-color);
}

.custom-option.selected {
    background-color: var(--primary-color);
    color: white;
}

/* Tooltip arrow for options menu */
.custom-options::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid white;
}

.search-btn {
    width: 32px !important;
    height: 32px;
    padding: 0 !important;
    border-radius: 50% !important;
    background-color: #f1f3f5 !important;
    color: #555 !important;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: Consolas, monospace;
    font-size: 1rem !important;
    font-weight: bold;
    line-height: 1;
}

.search-btn:hover:not(:disabled) {
    background-color: #e9ecef !important;
    color: var(--primary-color) !important;
    transform: scale(1.05) !important;
}

.search-btn:active:not(:disabled) {
    transform: scale(0.95) !important;
}

.search-btn.active {
    background-color: var(--primary-color) !important;
    color: white !important;
}

.divider {
    width: 1px;
    height: 20px;
    background-color: #e1e4e8;
    margin: 0 8px;
}

/* Highlight Animation */
@keyframes highlight-pulse {
    0% { background-color: rgba(33, 150, 243, 0.5); } /* 淡蓝色 */
    25% { background-color: rgba(33, 150, 243, 0.25); }
    100% { background-color: transparent; }
}
.highlight-anim {
    animation: highlight-pulse 2.5s ease-out;
}

/* ============================================================
   New components: result controls, summary, chips, sort,
   probability bars, intensity badges, school info, cards
   ============================================================ */

/* Migrated inline styles → classes */
.school-name { font-weight: 600; font-size: 1.05em; }
.school-badges { margin-top: 3px; margin-bottom: 3px; display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.school-code { font-size: 0.8em; margin-top: 2px; display: block; }
.major-list { font-size: 0.85em; color: #555; line-height: 1.5; }
.major-list > div { padding: 1px 0; }
.major-fee { color: var(--text-secondary); font-size: 0.95em; }
.req-culture { color: #27ae60; font-weight: 700; }
.req-culture--lg { font-size: 1.4em; }
.req-culture-diff { font-size: 0.85em; font-weight: 700; }
.nowrap { white-space: nowrap; }
.no-data { text-align: center; color: var(--text-secondary); padding: 30px 0; }

/* Probability bar + color buckets */
.prob-cell { display: flex; align-items: center; gap: 6px; }
.prob-bar {
    width: 44px; height: 7px; background: #e8eaed;
    border-radius: 4px; overflow: hidden; flex-shrink: 0; display: inline-block;
}
.prob-bar__fill { display: block; height: 100%; border-radius: 4px; transition: width 0.3s ease; }
.prob-val { font-weight: 700; font-variant-numeric: tabular-nums; }
.prob-high  { color: #27ae60; } .prob-bar__fill.prob-high  { background: #27ae60; }
.prob-mid   { color: #f39c12; } .prob-bar__fill.prob-mid   { background: #f39c12; }
.prob-low   { color: #d35400; } .prob-bar__fill.prob-low   { background: #d35400; }
.prob-vlow  { color: #c0392b; } .prob-bar__fill.prob-vlow  { background: #c0392b; }

/* Intensity badge (低/中/高 + mini bar) */
.intensity-badge {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 3px 9px; border-radius: 20px; font-size: 0.8rem; font-weight: 600;
    white-space: nowrap;
}
.intensity-bar { width: 28px; height: 5px; border-radius: 3px; overflow: hidden; background: rgba(0,0,0,0.1); display: inline-block; }
.intensity-bar > i { display: block; height: 100%; border-radius: 3px; }
.intensity-low  { background: #e8f5e9; color: #2e7d32; }
.intensity-low  .intensity-bar > i { background: #2e7d32; }
.intensity-mid  { background: #fff3e0; color: #ef6c00; }
.intensity-mid  .intensity-bar > i { background: #ef6c00; }
.intensity-high { background: #ffebee; color: #c62828; }
.intensity-high .intensity-bar > i { background: #c62828; }
.intensity-na   { background: #f1f3f5; color: #95a5a6; }

/* Result controls container (summary + filters) */
.result-controls {
    display: flex; flex-direction: column; gap: 14px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px 18px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

/* Summary bar */
.summary-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.summary-total { font-size: 0.95rem; color: var(--text-secondary); margin-right: 4px; }
.summary-total strong { color: var(--text-main); font-size: 1.1rem; }
.summary-seg {
    width: auto; padding: 5px 12px; border-radius: 20px; border: 1px solid transparent;
    font-size: 0.85rem; font-weight: 600; cursor: pointer; color: inherit;
    transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
}
.summary-seg strong { font-size: 1rem; margin-left: 2px; }
.summary-seg:hover:not(:disabled) { transform: translateY(-1px); box-shadow: var(--shadow-sm); background-color: inherit; }
.summary-seg--active { box-shadow: 0 0 0 2px var(--primary-color); }

/* Filter rows: chip groups + sort */
.filter-rows { display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: center; }
.chip-group { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.chip-group__label { font-size: 0.8rem; color: var(--text-secondary); font-weight: 600; margin-right: 2px; }
.chip {
    width: auto; padding: 5px 12px; border-radius: 20px;
    background: #f1f3f5; color: var(--text-main); border: 1px solid transparent;
    font-size: 0.82rem; font-weight: 500; cursor: pointer;
    transition: background 0.15s, color 0.15s, transform 0.15s;
}
.chip:hover:not(:disabled) { background: #e9ecef; color: var(--primary-color); transform: none; box-shadow: none; }
.chip--active { background: var(--primary-color); color: #fff; }
.chip--active:hover:not(:disabled) { background: var(--primary-hover); color: #fff; }
.sort-group { margin-left: auto; }
.sort-select {
    padding: 6px 10px; border: 1px solid var(--border-color); border-radius: var(--radius-md);
    font-size: 0.85rem; background: #fff; color: var(--text-main); cursor: pointer; width: auto;
}
.sort-select:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(74,144,226,0.1); }

/* Sortable header indicator */
th[data-sort-key] { cursor: pointer; }
th[data-sort-key]::after { content: ""; opacity: 0.35; font-size: 0.75em; margin-left: 4px; }
th[data-sort-key]:hover::after { content: "↕"; }
#resultsTable[data-active-sort] th[data-sort-key]:hover::after { content: "↕"; }
#resultsTable[data-sort-dir="asc"]  th.th-sorted::after { content: "▲"; opacity: 0.9; }
#resultsTable[data-sort-dir="desc"] th.th-sorted::after { content: "▼"; opacity: 0.9; }

th.col-name { min-width: 180px; }
th.col-major { min-width: 180px; }

/* ===== Mobile cards ===== */
.card-list { display: flex; flex-direction: column; gap: 12px; }
.result-card {
    background: var(--card-bg); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg); padding: 14px 16px; box-shadow: var(--shadow-sm);
}
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.card-head .school-name { font-size: 1.1rem; }
.card-badges { display: flex; flex-wrap: wrap; gap: 5px; margin: 8px 0; }
.card-badges:empty { display: none; }
.card-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 8px 14px;
    padding-top: 10px; border-top: 1px dashed var(--border-color);
}
.card-grid .kv { display: flex; flex-direction: column; gap: 2px; }
.card-grid .kv--wide { grid-column: 1 / -1; }
.card-grid .k { font-size: 0.78rem; color: var(--text-secondary); }
.card-grid .v { font-size: 0.95rem; font-weight: 600; display: flex; align-items: center; gap: 6px; }
.card-majors { margin-top: 10px; }
.card-majors summary { font-size: 0.85rem; color: var(--primary-color); cursor: pointer; font-weight: 600; }
.card-majors .major-list { margin-top: 6px; }
.result-card .school-code { margin-top: 10px; }

/* ============================================================
   Responsive
   ============================================================ */

/* Tablet */
@media (max-width: 980px) {
    .container { padding: 28px 24px; }
}

/* Mobile */
@media (max-width: 768px) {
    body { padding: 10px; }
    .container { padding: 16px; border-radius: var(--radius-md); }
    header { margin-bottom: 24px; padding-bottom: 16px; }
    h1 { font-size: 1.4rem; }
    .subtitle { font-size: 0.85rem; margin-top: 6px; }

    /* Controls → single column */
    .controls { padding: 16px; gap: 14px; grid-template-columns: 1fr; }
    .radio-group { flex-wrap: wrap; gap: 10px 16px; }

    /* Result controls */
    .result-controls { padding: 12px; }
    .filter-rows { gap: 12px; }
    .sort-group { margin-left: 0; width: 100%; }
    .sort-select { width: 100%; }

    /* Chart shorter on mobile */
    #mainChart { height: 300px !important; padding: 12px !important; }

    /* Search bar: stretch instead of fixed-width centered (fixes overflow) */
    .search-container {
        left: 8px; right: 8px; transform: none;
        min-width: 0; width: auto;
        bottom: 12px; padding: 7px 10px; gap: 4px;
        opacity: 0.96;
        border-radius: 16px; /* 窄屏占满宽度，圆角药丸感会变形，改用较小圆角 */
    }
    .search-container:focus-within { transform: translateY(-2px); }
    .divider { margin: 0 2px; }
    .search-input { min-width: 40px; padding: 5px 2px; }
    /* 触摸目标放大到 36px，并压缩占位以容纳一行 */
    .search-container .search-btn {
        width: 36px !important; height: 36px;
        font-size: 1.05rem !important; flex-shrink: 0;
    }
    .search-container #searchClearBtn {
        width: 30px !important; height: 30px !important;
    }
    .custom-select-wrapper { min-width: 0; }
    .custom-select-trigger { padding: 0 2px; height: 36px; font-size: 0.8rem; }
    .custom-select-trigger > span {
        max-width: 56px; overflow: hidden;
        text-overflow: ellipsis; white-space: nowrap;
    }
    #searchStatus { min-width: 34px; padding: 0 2px; font-size: 0.8rem; }

    /* Quick scroll nav: smaller, sit just above the mobile search bar */
    .scroll-nav { right: 12px; bottom: 78px; gap: 6px; }
    .scroll-nav__btn { width: 40px; height: 40px; font-size: 1.15rem; }
}

/* Very narrow phones: drop secondary dividers, shrink type filter further */
@media (max-width: 380px) {
    .search-container .divider { display: none; }
    .search-container { gap: 3px; padding: 6px 8px; }
    .custom-select-trigger > span { max-width: 40px; }
    .search-container .search-btn { width: 34px !important; height: 34px; }
}

/* Small phones */
@media (max-width: 420px) {
    .container { padding: 12px; }
    h1 { font-size: 1.25rem; }
    .result-card { padding: 12px; }
    .card-grid { grid-template-columns: 1fr; gap: 7px; }
    .summary-seg { padding: 4px 9px; font-size: 0.8rem; }
    .chip { padding: 4px 10px; font-size: 0.78rem; }
}

/* ============================================================
   预选志愿：悬浮按钮 + 面板 + 提示
   ============================================================ */

/* 悬浮触发按钮 */
.preselect-fab {
    position: fixed;
    right: 24px;
    bottom: 180px; /* 在快速滚动按钮之上 */
    z-index: 1000;
    width: 52px;
    height: 52px;
    padding: 0;
    border-radius: 50%;
    background: var(--primary-color);
    color: #fff;
    border: none;
    box-shadow: 0 4px 14px rgba(74,144,226,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}
.preselect-fab__icon { font-size: 1.5rem; line-height: 1; }
.preselect-fab { touch-action: none; cursor: grab; }
.preselect-fab:active { cursor: grabbing; }
.preselect-fab:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(74,144,226,0.5);
}
.preselect-fab__count {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 20px;
    height: 20px;
    padding: 0 5px;
    box-sizing: border-box;
    border-radius: 10px;
    background: #e74c3c;
    color: #fff;
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 20px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}
.preselect-fab__count:empty,
.preselect-fab__count[data-empty="1"] { display: none; }

/* 面板本体 */
.preselect-panel {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 1001;
    width: 340px;
    max-width: calc(100vw - 32px);
    max-height: 70vh;
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0,0,0,0.25);
    transform: translateY(20px) scale(0.96);
    opacity: 0;
    visibility: hidden;
    transform-origin: bottom right;
    transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
}
.preselect-panel.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
/* 半透明模式：防止遮挡视线 */
.preselect-panel.is-faded { opacity: 0.45; }
.preselect-panel.is-faded:hover,
.preselect-panel.is-faded:focus-within { opacity: 1; }

.preselect-panel__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
    cursor: grab;
    touch-action: none;
    user-select: none;
}
.preselect-panel__head:active { cursor: grabbing; }
.preselect-panel__title { font-weight: 700; font-size: 1rem; color: var(--text-main); }
#preselectTitleCount { color: var(--text-secondary); font-weight: 600; font-size: 0.9rem; }
.preselect-panel__actions { display: flex; align-items: center; gap: 4px; }
.pp-btn {
    width: 30px; height: 30px; padding: 0;
    border-radius: 8px;
    background: #f1f3f5; color: #555; border: none;
    font-size: 1.05rem; line-height: 1; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}
.pp-btn:hover:not(:disabled) { background: #e9ecef; color: var(--primary-color); transform: none; }
.pp-btn--text { width: auto; padding: 0 10px; font-size: 0.82rem; font-weight: 600; }
.preselect-panel.is-faded .preselect-opacity-on,
.pp-btn.is-active { background: var(--primary-color); color: #fff; }

.preselect-panel__hint {
    padding: 8px 14px;
    font-size: 0.76rem;
    color: var(--text-secondary);
    background: #f8f9fa;
    border-bottom: 1px solid var(--border-color);
    line-height: 1.4;
}

.preselect-list {
    overflow-y: auto;
    padding: 8px;
    flex: 1;
}
.preselect-list__empty {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    padding: 24px 12px;
}

.preselect-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 9px 10px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    margin-bottom: 6px;
    background: #fff;
}
.preselect-item:hover { background: #f8f9fa; }
.preselect-item__order {
    flex-shrink: 0;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #fff;
    font-size: 0.78rem; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    margin-top: 1px;
}
.preselect-item__body { flex: 1; min-width: 0; }
.preselect-item__name { font-weight: 600; font-size: 0.9rem; color: var(--text-main); }
.preselect-item__meta { font-size: 0.76rem; color: var(--text-secondary); margin-top: 2px; }
.preselect-item__meta .tag { padding: 1px 7px; font-size: 0.72rem; }
.preselect-item__majors { margin-top: 5px; }
.preselect-item__majors summary {
    font-size: 0.76rem; color: var(--primary-color);
    cursor: pointer; font-weight: 600; list-style: none;
}
.preselect-item__majors summary::-webkit-details-marker { display: none; }
.preselect-item__majors summary::before { content: "▸ "; }
.preselect-item__majors[open] summary::before { content: "▾ "; }
.preselect-item__majors .major-list { margin-top: 4px; font-size: 0.78rem; }
.preselect-item__remove {
    flex-shrink: 0;
    width: 24px; height: 24px; padding: 0;
    border-radius: 50%;
    background: transparent; color: #c0392b; border: none;
    font-size: 1.1rem; line-height: 1; font-weight: 700;
}
.preselect-item__remove:hover:not(:disabled) { background: #fde8e6; transform: none; }

/* 列表中已加入预选的行高亮 */
.is-preselected { box-shadow: inset 3px 0 0 var(--primary-color); }
tr.is-preselected td:first-child { box-shadow: inset 3px 0 0 var(--primary-color); }

/* 长按视觉反馈（移动端） */
.preselect-pressing { background: #eef2f7 !important; transition: background 0.15s; }

/* 操作反馈提示 */
.preselect-toast {
    position: fixed;
    left: 50%;
    bottom: 90px;
    transform: translateX(-50%) translateY(10px);
    z-index: 1002;
    background: rgba(44,62,80,0.95);
    color: #fff;
    padding: 9px 18px;
    border-radius: 20px;
    font-size: 0.85rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
    pointer-events: none;
    max-width: 80vw;
    text-align: center;
}
.preselect-toast.is-show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .preselect-fab { right: 12px; bottom: 130px; width: 48px; height: 48px; }
    .preselect-panel {
        right: 8px; left: 8px; bottom: 8px;
        width: auto; max-width: none;
        max-height: 60vh;
    }
    .preselect-toast { bottom: 76px; }
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
    .highlight-anim { animation: none; }
    button:hover:not(:disabled),
    .btn-secondary:hover:not(:disabled),
    .summary-seg:hover:not(:disabled) { transform: none; }
    .prob-bar__fill { transition: none; }
    .preselect-fab:hover:not(:disabled) { transform: none; }
    .preselect-panel { transition: opacity 0.2s, visibility 0.2s; }
    * { scroll-behavior: auto; }
}
/* 顶部横幅广告 */
.top-banner {
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin: -20px -20px 20px -20px;
    padding: 10px 48px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.top-banner--hidden {
    display: none;
}

.top-banner__link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
}

.top-banner__link:hover {
    text-decoration: underline;
}

.top-banner__badge {
    flex: none;
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1;
    padding: 3px 6px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.25);
}

.top-banner__close {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
}

.top-banner__close:hover {
    background: rgba(255, 255, 255, 0.35);
}

/* Site footer */
.site-footer {
    max-width: 1200px;
    margin: 24px auto 0;
    padding: 18px 24px 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-align: center;
}

.site-footer__links,
.site-footer__record {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 6px 16px;
}

.site-footer__record {
    margin-top: 8px;
}

.site-footer__label {
    color: var(--text-main);
    font-weight: 600;
}

.site-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.site-footer a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

@media (max-width: 768px) {
    .top-banner {
        padding: 9px 40px;
    }
    .top-banner__text {
        font-size: 0.85rem;
    }

    .site-footer {
        margin-top: 18px;
        padding: 16px 12px 4px;
    }

    .site-footer__links {
        flex-direction: column;
        gap: 4px;
    }
}