/* ============================================================
   YANLING Homepage v2 — Apple Liquid Glass (High Transparency)
   - 高透 + 轻微模糊
   - SVG 透镜畸变（feDisplacementMap）
   - Specular highlight 边缘高光
   - 果冻按钮（spring squash & stretch）
   - 滚动收缩丝滑动画
   ============================================================ */

/* ---------- SVG 折射透镜滤镜（Liquid Glass 核心） ---------- */
.svg-filters {
    position: absolute;
    width: 0;
    height: 0;
    pointer-events: none;
    overflow: hidden;
}

/* ---------- Liquid Glass 通用类 ---------- */
.liquid-glass {
    position: relative;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
    isolation: isolate;
}

/* Specular Highlight — 顶部高光线（玻璃边缘反光） */
.liquid-glass::before {
    content: '';
    position: absolute;
    top: 0;
    left: 8%;
    right: 8%;
    height: 1.5px;
    background: linear-gradient(90deg,
        transparent,
        var(--glass-highlight) 30%,
        var(--glass-highlight) 70%,
        transparent);
    opacity: 0.9;
    pointer-events: none;
    z-index: 2;
    border-radius: var(--radius-full);
}

/* 内层折射光 — 模拟透镜畸变的高光 */
.liquid-glass::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(140% 90% at 0% 0%, var(--glass-highlight-soft) 0%, transparent 45%),
        radial-gradient(120% 70% at 100% 100%, var(--glass-highlight-soft) 0%, transparent 50%);
    opacity: 0.65;
    pointer-events: none;
    z-index: 1;
    transition: opacity var(--t-slow) var(--ease-apple);
    mix-blend-mode: overlay;
}

.liquid-glass:hover::after {
    opacity: 1;
}

/* ---------- 加载动画 ---------- */
#zyyo-loading {
    position: fixed;
    inset: 0;
    background: var(--bg-base);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 600ms var(--ease-out);
}

#zyyo-loading-center {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--border-strong);
    border-top-color: var(--accent);
    animation: spin 800ms linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ---------- 背景装饰层 ---------- */
.aurora-bg {
    position: fixed;
    inset: 0;
    background-image: var(--bg-aurora);
    background-repeat: no-repeat;
    background-size: cover;
    pointer-events: none;
    z-index: -2;
    animation: auroraShift 24s ease-in-out infinite alternate;
}

@keyframes auroraShift {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-2%, 1%) scale(1.05); }
}

/* 浮动彩色光斑（为玻璃模糊提供视觉内容源） */
.aurora-blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.55;
    pointer-events: none;
    z-index: -1;
    animation: floatBlob 22s ease-in-out infinite;
}
.aurora-blob.b1 {
    width: 520px;
    height: 520px;
    top: -140px;
    left: -100px;
    background: radial-gradient(circle, rgba(200, 149, 109, 0.55), transparent 70%);
}
.aurora-blob.b2 {
    width: 580px;
    height: 580px;
    top: 30%;
    right: -120px;
    background: radial-gradient(circle, rgba(120, 100, 200, 0.42), transparent 70%);
    animation-delay: -7s;
    animation-duration: 26s;
}
.aurora-blob.b3 {
    width: 440px;
    height: 440px;
    bottom: -120px;
    left: 30%;
    background: radial-gradient(circle, rgba(200, 149, 109, 0.40), transparent 70%);
    animation-delay: -14s;
    animation-duration: 30s;
}

@keyframes floatBlob {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33%      { transform: translate(50px, -40px) scale(1.1); }
    66%      { transform: translate(-40px, 50px) scale(0.95); }
}

html[data-theme='light'] .aurora-blob { opacity: 0.5; }
html[data-theme='light'] .aurora-blob.b2 {
    background: radial-gradient(circle, rgba(100, 130, 200, 0.35), transparent 70%);
}

.noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    opacity: var(--noise-opacity);
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    mix-blend-mode: overlay;
}

/* ---------- 主体容器 ---------- */
.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

.container {
    width: 100%;
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* ============================================================
   顶部栏 — 常驻胶囊 + 中间口袋展开
   ============================================================ */
.site-header {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    width: calc(100% - 32px);
    max-width: 720px;
    transition: width var(--t-slow) var(--ease-spring),
                max-width var(--t-slow) var(--ease-spring);
}

/* 顶部胶囊 — 永远常驻 */
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    padding: 0 var(--space-4);
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-full);
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
    transition: all var(--t-slow) var(--ease-spring);
}

.nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.8;
    z-index: 2;
}

/* 左侧 brand — 永远常驻 */
.brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-display-brand);
    font-weight: var(--fw-semibold); /* 字重 600 */
    font-size: var(--fs-md);
    letter-spacing: 0.02em;
    color: var(--text-primary);
    opacity: 0;
    transform: translateX(-8px);
    transition: opacity var(--t-slow) var(--ease-apple),
                transform var(--t-slow) var(--ease-apple);
    pointer-events: none;
    z-index: 3;
    position: relative;
}

.site-header.scrolled .brand {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

/* 中间口袋触发器 — 点击展开功能列表 */
.pocket-trigger {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--t-base) var(--ease-spring);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08),
                inset 0 1px 0 var(--glass-shadow-inner);
    z-index: 4;
    -webkit-tap-highlight-color: transparent;
}

.pocket-trigger:hover {
    color: var(--text-primary);
    transform: translate(-50%, -50%) scale(1.04);
    background: var(--glass-bg);
}

.pocket-trigger:active {
}

.pocket-trigger .pocket-dots {
    display: inline-flex;
    gap: 3px;
}
.pocket-trigger .pocket-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent);
    transition: all var(--t-fast) var(--ease-spring);
}
.pocket-trigger:hover .pocket-dot {
    transform: scale(1.3);
}

/* 滚动后隐藏中间触发器（避免与 brand 重叠） */
.site-header.scrolled .pocket-trigger {
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, -50%) scale(0.7);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-left: auto;
    z-index: 3;
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: color var(--t-fast) var(--ease-apple),
                background var(--t-fast) var(--ease-apple);
}
.nav-link:hover {
    color: var(--text-primary);
    background: var(--glass-bg-subtle);
}

/* 口袋展开内容 — 默认隐藏在导航栏下方 */
.pocket-panel {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(-12px) scale(0.92);
    transform-origin: top center;
    background: var(--glass-bg-strong);
    -webkit-backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow-hover);
    padding: var(--space-5);
    min-width: 480px;
    max-width: calc(100vw - 32px);
    opacity: 0;
    pointer-events: none;
    transition: all var(--t-slow) var(--ease-spring);
    z-index: 200;
}

.pocket-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 12%;
    right: 12%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.9;
    z-index: 2;
}

.site-header.pocket-open .pocket-panel {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0) scale(1);
}

/* 口袋箭头指示器 */
.pocket-arrow {
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: var(--glass-bg-strong);
    border-left: 0.5px solid var(--glass-border);
    border-top: 0.5px solid var(--glass-border);
    opacity: 0;
    transition: opacity var(--t-base) var(--ease-apple);
    z-index: 1;
}
.site-header.pocket-open .pocket-arrow {
    opacity: 1;
}

.pocket-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-3);
    position: relative;
    z-index: 2;
}

.pocket-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: var(--space-4) var(--space-2);
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 0.5px solid var(--glass-border-inner);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--t-base) var(--ease-spring);
    text-align: center;
    -webkit-tap-highlight-color: transparent;
    position: relative;
    overflow: hidden;
}
.pocket-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 25%;
    right: 25%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.6;
}
.pocket-item:hover {
    background: var(--glass-bg);
    border-color: var(--accent);
    transform: translateY(-3px) scale(1.04);
    box-shadow: var(--glass-shadow);
}
.pocket-item:active {
}

.pocket-item .pocket-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    transition: transform var(--t-base) var(--ease-spring);
}
.pocket-item .pocket-icon svg {
    width: 22px;
    height: 22px;
}
.pocket-item:hover .pocket-icon {
    transform: scale(1.15);
}

.pocket-item .pocket-label {
    font-family: var(--font-display);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-sm);
    color: var(--text-primary);
    line-height: 1;
}
.pocket-item .pocket-desc {
    font-size: 10px;
    color: var(--text-tertiary);
    line-height: 1.3;
}

/* 主题切换 — Apple 风格圆形玻璃按钮 */
.theme-toggle {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border: 0.5px solid var(--glass-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08),
                inset 0 1px 0 var(--glass-shadow-inner);
    transition: all var(--t-fast) var(--ease-spring);
    position: relative;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
}
.theme-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: 25%;
    right: 25%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
}
.theme-toggle:hover {
    color: var(--text-primary);
    transform: scale(1.08);
}
.theme-toggle:active {
}
.theme-toggle svg {
    width: 16px;
    height: 16px;
    position: relative;
    z-index: 1;
}
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
html[data-theme='dark'] .theme-toggle .icon-sun { display: block; }
html[data-theme='dark'] .theme-toggle .icon-moon { display: none; }

/* 占位符 — 让内容下移避开 fixed header */
.header-spacer {
    height: 88px;
    flex-shrink: 0;
}

/* ---------- Hero 区 ---------- */
.hero {
    padding: var(--space-7) 0 var(--space-8);
    text-align: center;
    position: relative;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-tertiary);
    padding: 6px 14px;
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-5);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}
.eyebrow-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #10b981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.7);
    animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
    font-family: var(--font-display);
    font-weight: var(--fw-extrabold);
    font-size: clamp(40px, 8vw, var(--fs-4xl));
    line-height: 1.02;
    letter-spacing: -0.04em;
    margin-bottom: var(--space-5);
    color: var(--text-primary);
}

.hero-title .accent {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* YANLING Hero 大字 — 滚动时缩小到导航栏 */
.yanling-hero {
    display: inline-block;
    font-family: var(--font-display-brand);
    font-weight: var(--fw-extrabold);
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    letter-spacing: -0.02em;
    transform-origin: 50% 30%;  /* 略偏上，让缩小有"飞向左上角"的暗示 */
    will-change: transform, opacity;
    transition: transform 60ms linear, opacity 60ms linear;
}

.hero-subtitle {
    font-size: var(--fs-md);
    color: var(--text-secondary);
    max-width: var(--content-narrow);
    margin: 0 auto var(--space-6);
    line-height: 1.65;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    align-items: center;
    justify-content: center;
}

/* 社交链接 — Apple 风格圆形玻璃按钮（果冻感） */
.social-row {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-6);
    align-items: center;
    justify-content: center;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    border: 0.5px solid var(--glass-border);
    color: var(--text-secondary);
    transition: all var(--t-base) var(--ease-spring);
    position: relative;
    overflow: hidden;
    box-shadow: var(--glass-shadow);
    -webkit-tap-highlight-color: transparent;
}
.social-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    z-index: 2;
    opacity: 0.85;
}
.social-link::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(80% 60% at 30% 0%, var(--glass-highlight-soft) 0%, transparent 60%);
    opacity: 0.55;
    pointer-events: none;
    transition: opacity var(--t-base) var(--ease-apple);
}
.social-link:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-4px) scale(1.08);
    box-shadow: var(--glass-shadow-hover);
}
.social-link:hover::after { opacity: 1; }
.social-link:active {
transition: transform 80ms var(--ease-spring);
}
.social-link svg {
    width: 20px;
    height: 20px;
    position: relative;
    z-index: 1;
}

/* ---------- 时钟组件 ---------- */
.clock-panel {
    margin: var(--space-7) auto 0;
    width: fit-content;
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-5) var(--space-7);
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: var(--space-5);
}
.clock-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.85;
    z-index: 2;
}
.clock-panel::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(100% 60% at 50% 0%, var(--glass-highlight-soft) 0%, transparent 60%);
    opacity: 0.35;
    pointer-events: none;
    z-index: 1;
}

.clock-time {
    font-family: var(--font-display-brand);
    font-weight: var(--fw-bold);
    font-size: clamp(36px, 6vw, var(--fs-3xl));
    line-height: 1;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    position: relative;
    z-index: 2;
}

.clock-colon {
    display: inline-block;
    color: var(--accent);
    animation: clockBlink 1.2s ease-in-out infinite;
    margin: 0 2px;
}
@keyframes clockBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.35; }
}

.clock-seconds {
    font-family: var(--font-mono);
    font-size: var(--fs-md);
    font-weight: var(--fw-medium);
    color: var(--accent);
    font-variant-numeric: tabular-nums;
    margin-left: 4px;
    opacity: 0.85;
    align-self: flex-end;
    padding-bottom: 6px;
}

.clock-divider {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, transparent, var(--border-default), transparent);
    position: relative;
    z-index: 2;
}

.clock-date {
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: relative;
    z-index: 2;
    text-align: left;
}

.clock-weekday {
    font-family: var(--font-display);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-md);
    color: var(--text-primary);
    line-height: 1.1;
}

.clock-fulldate {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* 分隔线 */
.divider {
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border-default), transparent);
    margin: var(--space-7) 0;
}

/* ---------- 章节标题 ---------- */
.section {
    padding: var(--space-7) 0;
}

.section-header {
    display: flex;
    align-items: end;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    gap: var(--space-4);
}

.section-title {
    font-family: var(--font-display);
    font-weight: var(--fw-bold);
    font-size: var(--fs-lg);
    letter-spacing: -0.02em;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}
.section-title::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.section-meta {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--text-tertiary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* ---------- 功能卡片 ---------- */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
}

.project-card {
    display: flex;
    flex-direction: column;
    align-items: center;        /* 图标和文字都居中 */
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-5);
    text-align: center;          /* 文字居中 */
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-xl);
    transition: all var(--t-base) var(--ease-spring);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--glass-shadow);
    -webkit-tap-highlight-color: transparent;
}

/* Specular Highlight 顶部高光 */
.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 12%;
    right: 12%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    opacity: 0.8;
    transition: all var(--t-base) var(--ease-apple);
    pointer-events: none;
    z-index: 2;
}

/* 内层折射光晕 */
.project-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), var(--glass-highlight-soft), transparent 35%);
    opacity: 0;
    transition: opacity var(--t-slow) var(--ease-apple);
    pointer-events: none;
    z-index: 1;
}

.project-card:hover {
    transform: translateY(-6px) scale(1.02);
    border-color: var(--accent);
    box-shadow: var(--glass-shadow-hover),
                0 0 0 1px var(--accent-soft);
}
.project-card:hover::before {
    left: 4%;
    right: 4%;
    opacity: 1;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.project-card:hover::after { opacity: 0.95; }

.project-card:active {
transition: transform 80ms var(--ease-spring);
}

.project-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-soft), transparent);
    color: var(--accent);
    border: 0.5px solid var(--glass-border);
    transition: all var(--t-base) var(--ease-spring);
    position: relative;
    z-index: 2;
    overflow: hidden;
}
.project-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 25%;
    right: 25%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.65;
}
.project-icon svg {
    width: 24px;
    height: 24px;
    position: relative;
    z-index: 1;
    transition: transform var(--t-base) var(--ease-spring);
}
.project-card:hover .project-icon {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: #fff;
    border-color: var(--accent);
    transform: scale(1.1);
    box-shadow: 0 8px 20px var(--accent-soft);
}
.project-card:hover .project-icon svg {
    transform: scale(1.12);
}

.project-body {
    flex: 1;
    min-width: 0;
    width: 100%;                /* 确保占满卡片宽度，让内部居中可靠 */
    position: relative;
    z-index: 2;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;        /* 子元素居中 */
    justify-content: center;
}

.project-name {
    font-family: var(--font-display);
    font-weight: var(--fw-semibold);
    font-size: var(--fs-md);
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: -0.01em;
    text-align: center;
    line-height: 1.2;
    /* inline-block 让 name 自适应内容宽度，arrow 用 absolute 紧贴右侧 */
    display: inline-block;
    position: relative;
}

.project-arrow {
    display: inline-block;
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity var(--t-base) var(--ease-apple),
                transform var(--t-base) var(--ease-apple);
    color: var(--accent);
    font-weight: var(--fw-regular);
    /* 用 absolute 脱离文档流，让 name 文本真正居中 */
    position: absolute;
    left: 100%;
    top: 50%;
    margin-left: 6px;
    transform: translate(-4px, -50%);
}
.project-card:hover .project-arrow {
    opacity: 1;
    transform: translate(0, -50%);
}

.project-desc {
    font-size: var(--fs-sm);
    color: var(--text-tertiary);
    line-height: 1.5;
    text-align: center;
    width: 100%;
}

/* ---------- 搜索区 ---------- */
.search-panel {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    box-shadow: var(--glass-shadow);
    transition: all var(--t-base) var(--ease-apple);
    position: relative;
    overflow: hidden;
}
.search-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 8%;
    right: 8%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    opacity: 0.85;
    pointer-events: none;
    z-index: 2;
}
.search-panel::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(100% 60% at 50% 0%, var(--glass-highlight-soft) 0%, transparent 60%);
    opacity: 0.35;
    pointer-events: none;
    z-index: 1;
}
.search-panel:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft), var(--glass-shadow-hover);
}
.search-panel > * {
    position: relative;
    z-index: 2;
}

.search-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-tertiary);
    margin-bottom: var(--space-4);
}
.search-label-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-soft);
}

.search-box {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border: 0.5px solid var(--glass-border-inner);
    border-radius: var(--radius-lg);
    padding: 6px 6px 6px 16px;
    transition: border-color var(--t-base) var(--ease-apple);
}
.search-box:focus-within {
    border-color: var(--accent);
}

.search-engine {
    appearance: none;
    -webkit-appearance: none;
    background: var(--glass-bg-subtle);
    border: 0.5px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 8px 28px 8px 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    cursor: pointer;
    transition: all var(--t-fast) var(--ease-apple);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='none' stroke='%23a8a29e' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' d='M2 4l3 3 3-3'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}
.search-engine:hover {
    color: var(--text-primary);
    border-color: var(--border-default);
}

.search-input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    outline: none;
    font-family: var(--font-body);
    font-size: var(--fs-md);
    color: var(--text-primary);
    padding: 8px 0;
}
.search-input::placeholder {
    color: var(--text-quaternary);
}

/* 果冻按钮 — search button */
.search-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: var(--text-primary);
    color: var(--bg-base);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    transition: all var(--t-base) var(--ease-spring);
    -webkit-tap-highlight-color: transparent;
}
.search-btn:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-2px) scale(1.04);
    box-shadow: 0 8px 20px var(--accent-soft);
}
.search-btn:active {
transition: transform 80ms var(--ease-spring);
}

/* 热搜列表 */
.hotsearch-list {
    margin-top: var(--space-5);
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-2);
}

.hotsearch-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: 10px 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--t-fast) var(--ease-apple);
    color: var(--text-secondary);
}
.hotsearch-item:hover {
    background: var(--glass-bg-subtle);
    color: var(--text-primary);
    transform: translateX(2px);
}

.hot-rank {
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    color: var(--text-quaternary);
    width: 22px;
    text-align: center;
}
.hotsearch-item:nth-child(1) .hot-rank,
.hotsearch-item:nth-child(2) .hot-rank,
.hotsearch-item:nth-child(3) .hot-rank {
    color: var(--accent);
}

.hot-title {
    flex: 1;
    font-size: var(--fs-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hot-heat,
.hot-tag {
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: 10px;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    background: var(--bg-sunken);
    color: var(--text-tertiary);
    border: 1px solid var(--border-default);
    font-weight: var(--fw-semibold);
    letter-spacing: 0.04em;
}

.hot-tag.hot-new {
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border-color: rgba(16, 185, 129, 0.4);
}

.hot-tag.hot-hot {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: rgba(200, 149, 109, 0.4);
    font-weight: var(--fw-bold);
}

html[data-theme='light'] .hot-tag.hot-new {
    color: #059669;
}
html[data-theme='light'] .hot-tag.hot-hot {
    color: #a87349;
}

/* ---------- 页脚 ---------- */
.site-footer {
    margin-top: auto;
    padding: var(--space-7) 0 var(--space-6);
    text-align: center;
    position: relative;
}
.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 25%;
    right: 25%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-default), transparent);
}
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}
.footer-text {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--text-tertiary);
    letter-spacing: 0.04em;
}

/* ---------- 模态框 ---------- */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-5);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    backdrop-filter: blur(28px) saturate(180%);
    background: rgba(0, 0, 0, 0.35);
    opacity: 0;
    transition: opacity var(--t-base) var(--ease-apple);
}
.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    width: 100%;
    max-width: 820px;
    max-height: 90vh;
    background: var(--glass-bg-strong);
    -webkit-backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--glass-shadow-hover);
    overflow: hidden;
    transform: scale(0.94) translateY(12px);
    transition: transform var(--t-slow) var(--ease-spring);
    display: flex;
    flex-direction: column;
    position: relative;
}
.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    z-index: 2;
}
.modal.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 0.5px solid var(--glass-border-inner);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 2;
}
.modal-title {
    font-family: var(--font-display);
    font-weight: var(--fw-bold);
    font-size: var(--fs-lg);
    letter-spacing: -0.02em;
    color: var(--text-primary);
}
.modal-close {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 20px;
    line-height: 1;
    transition: all var(--t-fast) var(--ease-spring);
    background: var(--glass-bg-subtle);
    -webkit-tap-highlight-color: transparent;
}
.modal-close:hover {
    color: var(--text-primary);
    background: var(--bg-subtle);
    transform: rotate(90deg) scale(1.08);
}
.modal-close:active {
}

.modal-body {
    padding: var(--space-5) var(--space-6);
    overflow-y: auto;
    position: relative;
    z-index: 2;
}

/* 游戏网格 */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--space-3);
}

.game-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-4);
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--t-base) var(--ease-spring);
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
}
.game-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.8;
    z-index: 2;
}
.game-item:hover {
    border-color: var(--accent);
    transform: translateY(-4px) scale(1.03);
    box-shadow: var(--glass-shadow-hover);
}
.game-item:active {
transition: transform 80ms var(--ease-spring);
}
.game-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    position: relative;
    z-index: 2;
}
.game-icon svg {
    width: 100%;
    height: 100%;
    stroke-width: 1.5;
}
.game-item:hover .game-icon {
    color: var(--accent-hover);
    transform: scale(1.12);
    transition: all var(--t-base) var(--ease-spring);
}
.game-name {
    font-family: var(--font-display);
    font-weight: var(--fw-medium);
    font-size: var(--fs-sm);
    color: var(--text-primary);
    position: relative;
    z-index: 2;
}

/* 游戏画布容器 */
.game-container {
    position: fixed;
    inset: 0;
    z-index: 1100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-5);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    backdrop-filter: blur(28px) saturate(180%);
    background: rgba(0, 0, 0, 0.5);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.game-container.active {
    display: flex;
}
.game-container-inner {
    width: 100%;
    max-width: 720px;
    background: var(--glass-bg-strong);
    -webkit-backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    backdrop-filter: blur(var(--glass-blur-strong)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--glass-shadow-hover);
    padding: var(--space-6);
    position: relative;
    max-height: 90vh;
    overflow: auto;
    margin: auto;
}
.game-container-inner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    z-index: 2;
}
.close-game {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    transition: all var(--t-fast) var(--ease-spring);
    z-index: 10;
    background: var(--glass-bg-subtle);
    border: 0.5px solid var(--glass-border);
    -webkit-tap-highlight-color: transparent;
}
.close-game:hover {
    color: var(--text-primary);
    background: var(--bg-subtle);
    transform: rotate(90deg) scale(1.08);
}
.close-game:active {
}

/* 图片弹窗 */
.tc {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: none;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    background: rgba(0, 0, 0, 0.6);
    cursor: pointer;
}
.tc.active { display: flex; }
.tc-main {
    max-width: 90vw;
    max-height: 90vh;
    cursor: default;
}
.tc-img {
    max-width: 90vw;
    max-height: 90vh;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

/* ---------- 入场动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 700ms var(--ease-apple),
                transform 700ms var(--ease-apple);
    transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .aurora-bg, .aurora-blob { animation: none; }
    .eyebrow-dot { animation: none; }
    .clock-colon { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
    .container { padding: 0 var(--space-4); }
    .site-header { top: 12px; width: calc(100% - 24px); }
    .nav { height: 50px; padding: 0 var(--space-3); }
    .nav-link { display: none; }
    .pocket-trigger { padding: 6px 14px; font-size: 10px; }
    .pocket-panel { min-width: calc(100vw - 24px); padding: var(--space-4); }
    .pocket-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-2); }
    .header-spacer { height: 76px; }
    .hero { padding: var(--space-5) 0 var(--space-6); }
    .section { padding: var(--space-6) 0; }
    .section-header { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
    .section-meta { font-size: 10px; opacity: 0.85; }
    .project-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-3); }
    .project-card { padding: var(--space-4); gap: var(--space-2); }
    .project-icon { width: 44px; height: 44px; border-radius: var(--radius-md); }
    .project-icon svg { width: 20px; height: 20px; }
    .project-name { font-size: var(--fs-sm); }
    .project-desc { font-size: 11px; }
    .modal-content { max-height: 95vh; border-radius: var(--radius-xl); }
    .modal-body { padding: var(--space-4); }
    .search-box { flex-wrap: wrap; }
    .search-engine { width: 100%; }
    .search-btn { width: 100%; justify-content: center; }
    .clock-panel { padding: var(--space-4) var(--space-5); gap: var(--space-4); flex-wrap: wrap; justify-content: center; }
    .clock-divider { display: none; }
    .clock-date { text-align: center; align-items: center; }
    .hero-title { font-size: clamp(34px, 10vw, 48px); }
    .hero-subtitle { font-size: var(--fs-sm); }
    .social-link { width: 44px; height: 44px; }
    .social-link svg { width: 18px; height: 18px; }
    .games-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .hero-title { font-size: 32px; }
    .project-card { padding: var(--space-3); }
    .project-icon { width: 40px; height: 40px; }
    .clock-time { font-size: 36px; }
    .clock-seconds { font-size: var(--fs-sm); }
    .games-grid { grid-template-columns: repeat(2, 1fr); }
    .pocket-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   游戏样式（适配新主题）
   ============================================================ */

.game2028, .game2048,
.dino-game,
.minesweeper-game,
.tetris-game,
.gomoku-game {
    text-align: center;
    padding: var(--space-2) 0;
    color: var(--text-primary);
}

.game2048-header, .dino-game-header, .minesweeper-header, .tetris-header,
.gomoku-header {
    margin-bottom: var(--space-4);
    text-align: center;
}

.game2048-header h3, .dino-game-header h3, .minesweeper-header h3,
.tetris-header h3, .gomoku-header h3 {
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
}

.game-instruction {
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 0.5px solid var(--glass-border-inner);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    margin-bottom: var(--space-4);
    font-size: var(--fs-sm);
    color: var(--text-tertiary);
    text-align: center;
}
.game-instruction p { margin: 0; }

/* 通用按钮 — Apple 果冻风格 */
.mobile-btn,
.mobile-btn-large,
.game2048-controls button,
.dino-controls button,
.minesweeper-header button,
.tetris-controls .control-btn {
    background: var(--text-primary);
    color: var(--bg-base);
    border: none;
    border-radius: var(--radius-full);
    padding: 10px 22px;
    font-size: var(--fs-sm);
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    cursor: pointer;
    transition: all var(--t-base) var(--ease-spring);
    margin: 4px;
    min-width: 80px;
    -webkit-tap-highlight-color: transparent;
}
.mobile-btn:hover,
.mobile-btn-large:hover,
.game2048-controls button:hover,
.dino-controls button:hover,
.minesweeper-header button:hover,
.tetris-controls .control-btn:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 8px 20px var(--accent-soft);
}
.mobile-btn:active,
.mobile-btn-large:active,
.tetris-controls .control-btn:active {
transition: transform 80ms var(--ease-spring);
}

.mobile-btn-large {
    border-radius: var(--radius-md);
    padding: 16px 24px;
    font-size: var(--fs-md);
    min-width: 64px;
    min-height: 60px;
}

.game2048-score, .dino-score, .tetris-stats, .minesweeper-stats {
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    margin-bottom: var(--space-3);
    letter-spacing: 0.04em;
}

/* 2048 棋盘 — Liquid Glass 风格 */
.grid2048 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: 10px;
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border: 0.5px solid var(--glass-border);
    padding: 12px;
    border-radius: var(--radius-lg);
    margin: 0 auto var(--space-4);
    width: 100%;
    max-width: 340px;
    aspect-ratio: 1;
    box-shadow: var(--glass-shadow),
                inset 0 1px 0 var(--glass-shadow-inner);
    position: relative;
}

.tile2048 {
    background: var(--bg-elevated);
    border: 0.5px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: clamp(16px, 4vw, 28px);
    font-weight: var(--fw-bold);
    color: var(--text-primary);
    transition: all 200ms var(--ease-spring);
    position: relative;
}

@keyframes tileAppear {
    0%   { transform: scale(0); opacity: 0; }
    60%  { transform: scale(1.15); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}
.tile2028-new, .tile2048-new {
    animation: tileAppear 220ms var(--ease-spring);
}

@keyframes tileMerge {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.22); }
    100% { transform: scale(1); }
}
.tile2028-merged, .tile2048-merged {
    animation: tileMerge 260ms var(--ease-spring);
}

.tile2048-2    { background: rgba(200, 149, 109, 0.10); color: var(--text-secondary); }
.tile2048-4    { background: rgba(200, 149, 109, 0.20); color: var(--text-primary); }
.tile2048-8    { background: rgba(200, 149, 109, 0.40); color: #fff; }
.tile2048-16   { background: rgba(200, 149, 109, 0.62); color: #fff; }
.tile2048-32   { background: rgba(220, 110, 90, 0.70); color: #fff; }
.tile2048-64   { background: rgba(220, 90, 70, 0.80); color: #fff; }
.tile2048-128  { background: linear-gradient(135deg, #d6a582, #c8956d); color: #fff; font-size: clamp(14px, 3.5vw, 24px); box-shadow: 0 4px 12px rgba(200, 149, 109, 0.3); }
.tile2048-256  { background: linear-gradient(135deg, #e4b896, #d6a582); color: #fff; font-size: clamp(14px, 3.5vw, 24px); box-shadow: 0 4px 12px rgba(214, 165, 130, 0.35); }
.tile2048-512  { background: linear-gradient(135deg, #f0c9a8, #e4b896); color: #fff; font-size: clamp(14px, 3.5vw, 24px); box-shadow: 0 4px 16px rgba(228, 184, 150, 0.4); }
.tile2048-1024 { background: linear-gradient(135deg, #f5d4b0, #f0c9a8); color: #2a1a0a; font-size: clamp(12px, 3vw, 20px); box-shadow: 0 4px 18px rgba(240, 201, 168, 0.45); }
.tile2048-2048 { background: linear-gradient(135deg, #ffd700, #f5a623); color: #2a1a0a; font-size: clamp(12px, 3vw, 20px); box-shadow: 0 0 24px rgba(255, 215, 0, 0.6); }

/* 通用 canvas */
#dinoCanvas, #tetrisCanvas, #chess {
    display: block;
    margin: 0 auto var(--space-4);
    background: var(--glass-bg-subtle);
    border: 0.5px solid var(--glass-border);
    border-radius: var(--radius-lg);
    max-width: 100%;
    height: auto;
    touch-action: none;
    box-shadow: var(--glass-shadow);
}

/* 扫雷 */
.minesweeper-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 2px;
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 0.5px solid var(--glass-border);
    padding: 6px;
    border-radius: var(--radius-md);
    margin: 0 auto var(--space-4);
    width: 100%;
    max-width: 340px;
    aspect-ratio: 1;
}

.minesweeper-cell {
    background: var(--bg-elevated);
    border: 0.5px solid var(--border-subtle);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: var(--fw-bold);
    font-size: clamp(10px, 2.5vw, 14px);
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--t-fast) var(--ease-spring);
    -webkit-tap-highlight-color: transparent;
}
.minesweeper-cell:hover {
    background: var(--bg-subtle);
    transform: scale(1.08);
}
.minesweeper-cell:active {
transition: transform 80ms var(--ease-spring);
}
.minesweeper-cell.revealed {
    background: var(--bg-sunken);
    cursor: default;
    transform: scale(1);
}
.minesweeper-cell.mine {
    background: #ef4444;
    color: #fff;
}
.minesweeper-cell.flag {
    background: var(--accent-soft);
    color: var(--accent);
}

/* 控制按钮组 */
.game2048-controls, .dino-controls, .minesweeper-header {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: var(--space-3);
    flex-wrap: wrap;
}

/* 俄罗斯方块控制 */
.tetris-controls {
    margin-top: var(--space-4);
    text-align: center;
}
.tetris-controls .control-row {
    display: flex;
    justify-content: center;
    margin-bottom: 8px;
    gap: 8px;
    flex-wrap: wrap;
}
.tetris-controls .control-btn {
    font-size: var(--fs-md);
    padding: 12px 20px;
    margin: 0;
    background: var(--text-primary);
    color: var(--bg-base);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--t-base) var(--ease-spring);
    font-family: var(--font-body);
    font-weight: var(--fw-semibold);
    min-width: 56px;
    -webkit-tap-highlight-color: transparent;
}
.tetris-controls .control-btn:hover {
    background: var(--accent);
    color: #fff;
    transform: scale(1.06);
}
.tetris-controls .control-btn:active {
transition: transform 80ms var(--ease-spring);
}

.next-piece {
    margin: var(--space-3) auto;
}

/* 五子棋容器 */
.gomoku-game .container {
    max-width: 600px;
    margin: 0 auto;
    background: transparent;
    border-radius: 0;
    padding: 0;
    box-shadow: none;
}

.gomoku-game .game-modes {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}
.gomoku-game .mode-btn {
    padding: 8px 20px;
    border: 0.5px solid var(--border-default);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    color: var(--text-secondary);
    transition: all var(--t-fast) var(--ease-spring);
    -webkit-tap-highlight-color: transparent;
}
.gomoku-game .mode-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent);
    transform: translateY(-2px);
}
.gomoku-game .mode-btn:active {
transition: transform 80ms var(--ease-spring);
}
.gomoku-game .mode-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    box-shadow: 0 4px 12px var(--accent-soft);
}

.gomoku-game .game-info {
    text-align: center;
    margin-bottom: var(--space-3);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--text-tertiary);
}

.gomoku-game .canvas-container {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-4);
}

.gomoku-game #chess {
    border: 0.5px solid var(--border-default);
    cursor: crosshair;
}

.gomoku-game .controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}
.gomoku-game .control-btn {
    padding: 8px 18px;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    transition: all var(--t-base) var(--ease-spring);
    -webkit-tap-highlight-color: transparent;
}
.gomoku-game .restart-btn {
    background: var(--text-primary);
    color: var(--bg-base);
}
.gomoku-game .restart-btn:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-2px) scale(1.04);
}
.gomoku-game .restart-btn:active {
transition: transform 80ms var(--ease-spring);
}
.gomoku-game .pause-btn {
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    color: var(--text-primary);
    border: 0.5px solid var(--border-default);
}
.gomoku-game .pause-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.gomoku-game .speed-control {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
}
.gomoku-game .speed-slider {
    width: 100px;
    accent-color: var(--accent);
}

.gomoku-game .status {
    text-align: center;
    margin-top: var(--space-3);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--text-tertiary);
    min-height: 24px;
}

#gameContent {
    color: var(--text-primary);
    position: relative;
    z-index: 2;
}

@media (max-width: 768px) {
    #gameContent { width: 100%; padding: 0; }
    #dinoCanvas, #tetrisCanvas, #chess { max-width: 100%; height: auto; }
    .grid2048 { max-width: 300px; gap: 8px; padding: 10px; }
    .minesweeper-grid { max-width: 300px; gap: 2px; }
    .tetris-controls .control-btn { padding: 14px 22px; min-width: 64px; font-size: var(--fs-md); }
    .gomoku-game #chess { max-width: 100%; }
}

@media (max-width: 480px) {
    .grid2048 { max-width: 260px; gap: 6px; padding: 8px; }
    .tile2048 { font-size: clamp(14px, 5vw, 22px); }
    .minesweeper-grid { max-width: 260px; }
    .minesweeper-cell { font-size: 10px; }
    .tetris-controls .control-btn { padding: 12px 18px; min-width: 56px; font-size: var(--fs-sm); }
}


/* ============================================================
   游戏 Liquid Glass 增强 — 顶部高光线 + inset 阴影
   ============================================================ */

/* 2048 棋盘顶部高光 */
.grid2048::before {
    content: '';
    position: absolute;
    top: 0;
    left: 15%;
    right: 15%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    opacity: 0.7;
    pointer-events: none;
    z-index: 5;
    border-radius: var(--radius-full);
}

/* 2048 tile 顶部高光 */
.tile2048:not(:empty)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    pointer-events: none;
    opacity: 0.6;
    border-radius: var(--radius-full);
}

/* 扫雷格子顶部高光 */
.minesweeper-cell:not(.revealed)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 15%;
    right: 15%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.5;
    border-radius: var(--radius-full);
}
.minesweeper-cell {
    position: relative;
    overflow: hidden;
}

/* 扫雷格子内部高光（已揭开时） */
.minesweeper-cell.revealed::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(80% 50% at 30% 0%, var(--glass-highlight-soft) 0%, transparent 60%);
    opacity: 0.3;
    pointer-events: none;
}

/* canvas 顶部高光 */
#dinoCanvas, #tetrisCanvas, #chess {
    position: relative;
}
#dinoCanvas::before, #tetrisCanvas::before, #chess::before {
    content: '';
    position: absolute;
    top: 0;
    left: 10%;
    right: 10%;
    height: 1.5px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.6;
    z-index: 2;
    border-radius: var(--radius-full);
}

/* 五子棋模式按钮顶部高光 */
.gomoku-game .mode-btn::before,
.gomoku-game .control-btn::before,
.mobile-btn::before,
.mobile-btn-large::before {
    content: '';
    position: absolute;
    top: 0;
    left: 25%;
    right: 25%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.5;
    border-radius: var(--radius-full);
}
.gomoku-game .mode-btn,
.gomoku-game .control-btn,
.mobile-btn,
.mobile-btn-large {
    position: relative;
    overflow: hidden;
}

/* 俄罗斯方块控制按钮顶部高光 */
.tetris-controls .control-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 25%;
    right: 25%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.4;
    border-radius: var(--radius-full);
}
.tetris-controls .control-btn {
    position: relative;
    overflow: hidden;
}

/* 游戏内 instruction 卡顶部高光 */
.game-instruction::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-highlight), transparent);
    pointer-events: none;
    opacity: 0.4;
    border-radius: var(--radius-full);
}
.game-instruction {
    position: relative;
    overflow: hidden;
}