:root {
    --secondary-color: #3498db;
    --bg-white: #ffffff;
    --shadow-md: 0 5px 15px rgba(0,0,0,0.1);
    --transition: 0.3s ease;

    --grad: linear-gradient(135deg, #4a9eff, #6c5ce7);
    --ease: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --txt2: #666666;
    --accent: #4a9eff;
    --accent2: #6c5ce7;
    --txt: #1a1a2e;

    /* 液态玻璃设计系统 — 全站通用 */
    --bg-base: #f5f0ff;
    --text-dark: #1a1530;
    --text-mid: #5a5078;
    --text-light: #9a90b8;
    --grad-pink: #ff6b9d;
    --grad-purple: #c44dff;
    --grad-blue: #4dd0ff;
    --grad-green: #4dffb8;
}

/* ========== 液态玻璃通用卡片 ========== */
.liquid-glass {
    background: rgba(255,255,255,0.35);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255,255,255,0.55);
    box-shadow: 0 8px 32px rgba(120,80,200,0.1);
    position: relative;
    overflow: hidden;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', -apple-system, sans-serif;
    background: var(--bg-white);
    color: var(--txt);
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 注意：main 是纵向 flex 容器，直接子元素都是 flex item（交叉轴 = 水平方向）。
   若子元素写了 margin:0 auto（如 .photo-desk），auto 外边距会接管交叉轴对齐，
   使该元素退化为 fit-content —— 宽度收缩到内容宽度。显式声明 align-items:stretch
   并把子元素 width 设为 100%，才不会塌缩。 */
main { flex: 1; display: flex; flex-direction: column; align-items: stretch; }

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--ease);
    background: transparent;
}
.site-header.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-bottom: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 8px;
    text-decoration: none;
    flex-shrink: 0;
}
.logo-text {
    font-family: 'Oswald', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 3px;
    transition: letter-spacing 0.3s ease, filter 0.3s ease;
}
.logo:hover .logo-text {
    letter-spacing: 5px;
    filter: drop-shadow(0 0 6px rgba(74, 158, 255, 0.55));
}
.logo-sub {
    font-size: 0.85rem;
    color: var(--txt2);
    letter-spacing: 2px;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 5px;
}
.main-nav a {
    position: relative;
    display: block;
    padding: 8px 18px;
    color: #2d1b4e;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 50px;
    background: rgba(255,255,255,0.35);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.5);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.site-header.scrolled .main-nav a {
    color: #2d1b4e;
}
.main-nav a:hover {
    color: #fff;
    background: linear-gradient(135deg, #4a9eff, #6c5ce7);
    border-color: transparent;
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 16px rgba(74,158,255,0.35);
}
.site-header.scrolled .main-nav a:hover {
    color: #fff;
}
.main-nav a.active {
    color: #fff;
    background: linear-gradient(135deg, #4a9eff, #6c5ce7);
    border-color: transparent;
    box-shadow: 0 4px 14px rgba(74,158,255,0.3);
}
.site-header.scrolled .main-nav a.active {
    color: #fff;
}

.main-nav a::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 3px;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, #4a9eff, #2980b9);
    transition: width 0.3s ease;
}
.main-nav a:hover::after,
.main-nav a.active::after {
    width: calc(100% - 26px);
}

.site-header::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #4a9eff, #2980b9, #4a9eff, transparent);
    background-size: 200% 100%;
    opacity: 0;
    transition: opacity 0.4s ease;
    animation: headerLineFlow 3s linear infinite;
    pointer-events: none;
}
.site-header.scrolled::after { opacity: 1; }
@keyframes headerLineFlow {
    0% { background-position: 0% 0; }
    100% { background-position: 200% 0; }
}

.footer {
    flex-shrink: 0;
    position: relative;
    padding: 20px 0;
    margin-top: 40px;
    background: rgba(255,255,255,0.25);
    backdrop-filter: blur(24px) saturate(1.4);
    -webkit-backdrop-filter: blur(24px) saturate(1.4);
    border-top: 1px solid rgba(255,255,255,0.5);
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #ff6b9d, #c44dff, #4dd0ff, #4dffb8, transparent);
    background-size: 200% 100%;
    animation: footerLineFlow 6s linear infinite;
    pointer-events: none;
}

@keyframes footerLineFlow {
    0% { background-position: 0% 0; }
    100% { background-position: 200% 0; }
}

.footer-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
.footer-bottom {
    display: flex;
    align-items: center;
    gap: 16px;
}
.footer-left { flex: 1; display: flex; align-items: center; justify-content: flex-start; }
.footer-nav { display: flex; gap: 24px; flex-wrap: wrap; align-items: center; }
.footer-nav a {
    color: #5a5078;
    font-size: 0.85rem;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.25s ease;
    position: relative;
}
.footer-nav a:hover,
.footer-nav a.active { color: #c44dff; }
.footer-center { flex: 1; display: flex; align-items: center; justify-content: center; }
.copyright { color: #9a90b8; font-size: 0.82rem; }
.footer-right { flex: 1; display: flex; align-items: center; justify-content: flex-end; }
#runtime {
    margin: 0 !important;
    font-size: 0.78rem !important;
    color: #9a90b8 !important;
    line-height: 1 !important;
    font-family: 'Syne', sans-serif;
    letter-spacing: 1px;
}

.footer-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -3px;
    width: 0;
    height: 1.5px;
    background: linear-gradient(90deg, #ff6b9d, #c44dff);
    border-radius: 2px;
    transition: width 0.3s ease;
}
.footer-nav a:hover::after,
.footer-nav a.active::after { width: 100%; }

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--secondary-color);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: #2980b9; transform: translateY(-3px); }

/* ========== 自定义鼠标光标 ========== */
* {
    cursor: url('../images/cursor/正常选择.cur'), auto !important;
}
a, button, input[type="submit"], input[type="button"], input[type="reset"],
[role="button"], .team-card, .clickable, label[for], .more-btn, .btn-primary,
.submit-btn, .back-to-top, [onclick], .cursor-pointer, .modal-close,
.album-item, .album-img, .news-card, .carousel, .era-card, .feedback-item,
.chat-send, .version-item, .nav-link, .footer-nav a {
    cursor: url('../images/cursor/链接选择.cur'), pointer !important;
}
input[type="text"], input[type="email"], input[type="password"], input[type="number"],
input[type="search"], input[type="tel"], input[type="url"], textarea,
[contenteditable="true"], select, input[type="date"], input[type="time"],
input[type="datetime-local"], input[type="month"], input[type="week"] {
    cursor: url('../images/cursor/文本选择.cur'), text !important;
}
*:disabled, .disabled, [disabled], [aria-disabled="true"] {
    cursor: not-allowed !important;
}
body.loading, .cursor-wait {
    cursor: url('../images/cursor/忙.cur'), wait !important;
}
[draggable="true"], .cursor-move {
    cursor: url('../images/cursor/移动.cur'), move !important;
}
.cursor-crosshair {
    cursor: url('../images/cursor/精确选择.cur'), crosshair !important;
}

/* ========== 全站弹簧动效 ========== */
.nav-card, .news-card, .stat-card, .ann-item,
.photo-item, .flip-card, .planet-node,
.quick-btn, .send-btn, .liquid-btn, .cta-btn,
.modal-close, .chat-restart, .history-item,
.gallery-hint, .back-to-top, .footer-nav a {
    transition-timing-function: cubic-bezier(0.175, 0.885, 0.32, 1.275) !important;
    transition-duration: 0.5s !important;
}

/* 按钮hover轻微旋转 */
.liquid-btn:hover, .cta-btn:hover, .quick-btn:hover,
.send-btn:hover, .modal-close:hover, .chat-restart:hover {
    transform: scale(1.08) rotate(-2deg) !important;
}

/* 卡片hover大位移 */
.nav-card:hover, .news-card:hover, .stat-card:hover,
.ann-item:hover, .planet-node:hover, .info-card:hover {
    transform: translateY(-8px) scale(1.02) !important;
    box-shadow: 0 20px 50px rgba(120,80,200,0.2) !important;
}

/* ============================================================
   超宽屏适配 — 仅此一处断点
   （移动端/平板/小笔记本断点已按需求全部移除，页面按桌面版布局呈现）
   ============================================================ */

/* ---------- 超宽屏 >1920px ---------- */
@media (min-width: 1920px) {
    .header-inner { max-width: 1600px; padding: 0 60px; }
    .footer-container { max-width: 1600px; }
    .nav-cards-section, .news-section { max-width: 1600px; }
    .bottom-columns { padding: 20px 100px 100px; gap: 120px; }
    .bottom-columns .stats-grid { gap: 28px; }
    .bottom-columns .stat-card { padding: 44px 36px; }
    .bottom-columns .stat-number { font-size: 2.8rem; }
    .changelog-page, .map-page, .terms-page, .policy-page { max-width: 1200px; }
    .card-grid-section, .gallery-hero, .festival-grid-section, .team-hero, .festival-hero { max-width: 1600px; }
    .flip-card { width: 300px; height: 400px; }
    .photo-desk { max-width: 1600px; }
    .platform-cards { gap: 28px; }
    .stream-cards { gap: 20px; }
    .festival-grid { gap: 28px; }
}