/* ============================================================
   棱镜拾光 - 主样式表
   主色调：淡蓝 #4A90E2 + 白 #FFFFFF
   点缀色：浅橙 #FF8C42
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
    --primary: #4A90E2;
    --primary-light: #6BA3E8;
    --primary-lighter: #E8F1FB;
    --primary-dark: #3570B8;
    --accent: #FF8C42;
    --accent-light: #FFA86E;
    --accent-lighter: #FFF3EA;
    --bg: #F8FAFD;
    --bg-white: #FFFFFF;
    --text: #2C3E50;
    --text-light: #5A6C7D;
    --text-lighter: #94A3B3;
    --border: #E2E8F0;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

/* ---------- 重置 & 基础 ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
                 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---------- 通用容器 ---------- */
.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-lighter);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.subsection-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    padding: 10px 0;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon svg {
    width: 36px;
    height: 36px;
    transition: var(--transition);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    transition: var(--transition);
}

.nav-link:hover {
    background: var(--primary-lighter);
    color: var(--primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(74,144,226,0.35);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(74,144,226,0.45);
}

.btn-outline {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border: 1.5px solid rgba(255,255,255,0.4);
    backdrop-filter: blur(10px);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.25);
    transform: translateY(-2px);
}

/* ==================== 1. Hero Section ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #4A90E2 0%, #2C5F9E 30%, #1A3A6B 70%, #0F2440 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(255,140,66,0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 80%, rgba(74,144,226,0.2) 0%, transparent 60%),
        radial-gradient(ellipse at 50% 50%, rgba(255,255,255,0.03) 0%, transparent 70%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to top, var(--bg), transparent);
}

.hero-content {
    text-align: center;
    color: #fff;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50px;
    font-size: 0.9rem;
    margin-bottom: 28px;
    animation: fadeInUp 0.6s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 20px;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero-highlight {
    background: linear-gradient(135deg, var(--accent), #FFB347);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    opacity: 0.85;
    margin-bottom: 36px;
    line-height: 1.8;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

/* 三大核心卡片 */
.hero-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.hero-card {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
}

.hero-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-card:hover {
    background: rgba(255,255,255,0.18);
    transform: translateY(-6px);
    border-color: rgba(255,255,255,0.3);
    box-shadow: 0 12px 40px rgba(0,0,0,0.2);
}

.hero-card-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.hero-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.hero-card p {
    font-size: 0.85rem;
    opacity: 0.8;
    line-height: 1.5;
    margin-bottom: 16px;
}

.hero-card-bar {
    height: 6px;
    background: rgba(255,255,255,0.2);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.hero-card-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #FFB347);
    border-radius: 3px;
    transition: width 1.5s ease-out;
}

.hero-card-num {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}
.hero-card-num span { font-size: 0.8rem; opacity: 0.6; font-weight: 400; }

.recipe-tags {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.recipe-tags span {
    padding: 4px 12px;
    background: rgba(255,140,66,0.25);
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Hero 滚动指示器 */
.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.6);
    font-size: 0.8rem;
    z-index: 1;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid rgba(255,255,255,0.4);
    border-bottom: 2px solid rgba(255,255,255,0.4);
    transform: rotate(45deg);
}

/* ==================== 2. 宠物养成系统 ==================== */
.pet-system {
    padding: 100px 0;
    background: var(--bg-white);
}

.pet-layout {
    display: grid;
    grid-template-columns: 1fr 1fr 1.2fr;
    gap: 28px;
    align-items: start;
}

.pet-display {
    text-align: center;
    padding: 32px 20px;
    background: linear-gradient(180deg, #F0F7FF 0%, #FFF 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

/* CSS 蝴蝶 */
.butterfly {
    position: relative;
    width: 100px;
    height: 120px;
    margin: 0 auto 20px;
    animation: butterflyFloat 3s ease-in-out infinite;
    cursor: pointer;
}

.butterfly-body {
    position: absolute;
    top: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.butterfly-head {
    width: 16px;
    height: 16px;
    background: var(--text);
    border-radius: 50%;
    position: relative;
    margin: 0 auto;
}

.eye {
    width: 4px;
    height: 6px;
    background: #fff;
    border-radius: 50%;
    position: absolute;
    top: 3px;
}
.eye.left { left: 3px; }
.eye.right { right: 3px; }

.mouth {
    width: 6px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
}

.butterfly-torso {
    width: 6px;
    height: 28px;
    background: linear-gradient(180deg, var(--text) 0%, #5A6C7D 100%);
    border-radius: 3px;
    margin: 2px auto 0;
}

/* 翅膀 */
.wing {
    position: absolute;
    border-radius: 50%;
    opacity: 0.85;
}

.wing-left-top {
    width: 40px;
    height: 32px;
    background: linear-gradient(135deg, #A8D8FF, #6BA3E8);
    top: 18px;
    left: 10px;
    transform: rotate(-20deg);
    animation: wingFlapLeft 0.6s ease-in-out infinite alternate;
    transform-origin: right center;
}

.wing-right-top {
    width: 40px;
    height: 32px;
    background: linear-gradient(225deg, #A8D8FF, #6BA3E8);
    top: 18px;
    right: 10px;
    transform: rotate(20deg);
    animation: wingFlapRight 0.6s ease-in-out infinite alternate;
    transform-origin: left center;
}

.wing-left-bottom {
    width: 30px;
    height: 22px;
    background: linear-gradient(135deg, #FFB88C, #FF8C42);
    top: 44px;
    left: 18px;
    transform: rotate(-10deg);
    animation: wingFlapLeft 0.6s ease-in-out 0.1s infinite alternate;
    transform-origin: right center;
}

.wing-right-bottom {
    width: 30px;
    height: 22px;
    background: linear-gradient(225deg, #FFB88C, #FF8C42);
    top: 44px;
    right: 18px;
    transform: rotate(10deg);
    animation: wingFlapRight 0.6s ease-in-out 0.1s infinite alternate;
    transform-origin: left center;
}

.wing-pattern {
    position: absolute;
    width: 10px;
    height: 10px;
    background: rgba(255,255,255,0.5);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.sparkles { position: absolute; inset: 0; }
.sparkle {
    position: absolute;
    font-size: 0.7rem;
    opacity: 0;
    animation: sparkle 2s ease-in-out infinite;
}
.s1 { top: 0; left: 20%; animation-delay: 0s; }
.s2 { top: 10px; right: 10%; animation-delay: 0.7s; }
.s3 { bottom: 15px; left: 15%; animation-delay: 1.4s; }

.pet-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
}

.pet-level {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* 喂食按钮 */
.btn-feed {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: #fff;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    margin-top: 16px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-feed:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255,140,66,0.4);
}

.btn-feed:active {
    transform: scale(0.95);
}

.btn-feed.pulse {
    animation: feedPulse 0.4s ease-out;
}

.feed-effect {
    position: absolute;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0;
    pointer-events: none;
}

.feed-effect.show {
    animation: feedFloat 1s ease-out forwards;
}

/* 养成数据 */
.pet-stats {
    padding: 28px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.pet-stats h3, .pet-unlocks h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.stat-item {
    margin-bottom: 20px;
}

.stat-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.stat-icon { font-size: 1.1rem; }
.stat-label { font-size: 0.9rem; font-weight: 500; }
.stat-value { margin-left: auto; font-weight: 700; color: var(--primary); font-size: 0.95rem; }

.stat-bar {
    height: 8px;
    background: #E8ECF0;
    border-radius: 4px;
    overflow: hidden;
}

.stat-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.6s ease-out;
}

.cocoon-fill {
    background: linear-gradient(90deg, var(--primary), var(--accent));
    width: 65%;
}

.energy-fill {
    background: linear-gradient(90deg, #F5A623, #FF8C42);
    width: 80%;
}

.stat-days {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}

.day-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #E8ECF0;
    transition: var(--transition);
}

.day-dot.active {
    background: var(--accent);
    box-shadow: 0 0 8px rgba(255,140,66,0.4);
}

/* 解锁机制 */
.pet-unlocks {
    padding: 28px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.unlock-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.unlock-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.unlock-card.unlocked {
    background: #F0FFF4;
    border: 1px solid rgba(76,175,80,0.2);
}

.unlock-card.locked {
    background: #FAFAFA;
    border: 1px solid var(--border);
    opacity: 0.7;
}

.unlock-card:hover {
    transform: translateX(4px);
}

.unlock-icon { font-size: 1.6rem; }
.unlock-info { flex: 1; }
.unlock-info strong { display: block; font-size: 0.9rem; }
.unlock-info p { font-size: 0.78rem; color: var(--text-light); }

.unlock-badge {
    font-size: 0.72rem;
    padding: 3px 10px;
    border-radius: 10px;
    font-weight: 600;
}

.unlocked .unlock-badge {
    background: #E8F5E9;
    color: #2E7D32;
}

.locked .unlock-badge {
    background: #F5F5F5;
    color: #9E9E9E;
}

/* ==================== 3. 博物馆 ==================== */
.museum {
    padding: 100px 0;
    background: var(--bg);
}

/* 轮播 */
.museum-carousel-container {
    margin-bottom: 48px;
}

.carousel {
    overflow: hidden;
    border-radius: var(--radius-lg);
    position: relative;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s ease-out;
}

.carousel-slide {
    min-width: 100%;
    padding: 0 4px;
}

.slide-card {
    background: var(--slide-bg, linear-gradient(135deg, #667eea, #764ba2));
    padding: 40px 32px;
    border-radius: var(--radius-lg);
    color: #fff;
    min-height: 200px;
    position: relative;
    overflow: hidden;
}

.slide-badge {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    font-size: 0.8rem;
    margin-bottom: 16px;
}

.slide-card h4 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.slide-card p {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 16px;
    line-height: 1.6;
}

.slide-meta {
    display: flex;
    gap: 20px;
    font-size: 0.85rem;
    opacity: 0.75;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 16px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #CBD5E0;
    cursor: pointer;
    transition: var(--transition);
}

.carousel-dot.active {
    background: var(--primary);
    width: 28px;
    border-radius: 5px;
}

/* 博物馆双栏 */
.museum-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.museum-hot, .museum-mine {
    background: var(--bg-white);
    padding: 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

/* 本周热门标签 */
.tab-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-light);
    background: var(--bg);
    transition: var(--transition);
}

.tab-btn.active, .tab-btn:hover {
    background: var(--primary);
    color: #fff;
}

.hot-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.hot-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px;
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
}

.hot-item:hover {
    background: var(--bg);
}

.hot-rank {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text-light);
    background: #F1F5F9;
    flex-shrink: 0;
}

.hot-rank.top { background: var(--accent); color: #fff; }

.hot-thumb {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
}

.hot-info strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.hot-info p { font-size: 0.78rem; color: var(--text-light); }

/* 我的博物馆标签 */
.mine-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.mine-tab {
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-light);
    transition: var(--transition);
}

.mine-tab.active {
    background: var(--primary-lighter);
    color: var(--primary);
    font-weight: 600;
}

.mine-panel { display: none; }
.mine-panel.active { display: block; }

.like-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.like-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    cursor: pointer;
}

.like-item:hover { background: var(--primary-lighter); }

.like-thumb {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-white);
    border-radius: 8px;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.like-item p {
    font-size: 0.82rem;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.asset-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.asset-card {
    text-align: center;
    padding: 20px 12px;
    background: linear-gradient(135deg, var(--primary-lighter), var(--accent-lighter));
    border-radius: var(--radius);
}

.asset-num {
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
}

.asset-card > span:last-child {
    font-size: 0.78rem;
    color: var(--text-light);
}

.social-feed {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.feed-item {
    padding: 12px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    transition: var(--transition);
}

.feed-item:hover { background: var(--primary-lighter); }

.medal-grid, .illus-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.medal-item {
    text-align: center;
    padding: 14px 8px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.medal-item:hover { transform: translateY(-2px); }
.medal-item.locked { opacity: 0.5; }
.medal-icon { font-size: 1.5rem; display: block; margin-bottom: 4px; }
.medal-item > span:last-child { font-size: 0.75rem; }

.illus-item {
    text-align: center;
    padding: 14px 8px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.illus-item.locked { opacity: 0.5; }
.illus-icon { font-size: 1.8rem; }
.illus-item p { font-size: 0.82rem; font-weight: 600; margin: 4px 0 2px; }
.illus-item span { font-size: 0.72rem; color: var(--text-light); }

/* ==================== 4. 个人中心 ==================== */
.profile {
    padding: 100px 0;
    background: var(--bg-white);
}

.profile-layout {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 28px;
}

.profile-stats {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.profile-card {
    padding: 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    text-align: center;
}

.stat-main {
    background: linear-gradient(135deg, var(--primary-lighter), var(--accent-lighter));
}

.avatar-circle {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    background: var(--bg-white);
    border-radius: 50%;
    font-size: 2rem;
    box-shadow: var(--shadow);
}

.stat-main h3 {
    font-size: 1.2rem;
    font-weight: 700;
}
.profile-id { font-size: 0.82rem; color: var(--text-light); }

.stat-detail {
    background: var(--bg);
}

.detail-row {
    display: flex;
    justify-content: space-around;
}

.detail-item {
    text-align: center;
}

.detail-num {
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
}

.detail-label {
    font-size: 0.75rem;
    color: var(--text-light);
}

/* 勋章展示 */
.profile-medals h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.medal-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.medal-badge {
    padding: 18px 14px;
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.medal-badge:hover { transform: translateY(-4px); }

.medal-badge.gold   { background: linear-gradient(135deg, #FFF9E6, #FFF3CD); border: 1.5px solid #FFD700; }
.medal-badge.silver { background: linear-gradient(135deg, #F5F7FA, #E8ECF0); border: 1.5px solid #C0C0C0; }
.medal-badge.bronze { background: linear-gradient(135deg, #FFF5F0, #FFE8D6); border: 1.5px solid #CD7F32; }
.medal-badge.basic  { background: linear-gradient(135deg, #F0F7FF, #E0ECFA); border: 1.5px solid #A0C4E8; }

.badge-icon { font-size: 1.8rem; display: block; margin-bottom: 6px; }
.medal-badge span { font-weight: 700; font-size: 0.9rem; display: block; }
.medal-badge small { font-size: 0.72rem; color: var(--text-light); }

/* 功能入口 */
.profile-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.action-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 20px;
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
}

.action-card:hover {
    background: var(--primary-lighter);
    transform: translateX(6px);
}

.action-icon { font-size: 1.4rem; }
.action-label { flex: 1; font-weight: 600; font-size: 0.95rem; }
.action-arrow { color: var(--text-lighter); font-size: 1.1rem; transition: var(--transition); }
.action-card:hover .action-arrow { color: var(--primary); transform: translateX(4px); }

/* ==================== 5. 项目亮点 ==================== */
.features {
    padding: 100px 0;
    background: var(--bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px 24px;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon-wrap {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: var(--primary-lighter);
    border-radius: 20px;
}

.feature-icon { font-size: 1.8rem; }

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* ==================== 6. 关于我们 ==================== */
.about {
    padding: 100px 0;
    background: var(--bg-white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.team-card {
    padding: 32px 24px;
    text-align: center;
    background: var(--bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.team-avatar {
    font-size: 3rem;
    margin-bottom: 12px;
}

.team-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.team-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* 商业价值 */
.biz-section {
    margin-bottom: 48px;
}

.biz-section h3, .compliance h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-align: center;
}

.biz-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.biz-card {
    padding: 28px 20px;
    text-align: center;
    background: linear-gradient(135deg, var(--accent-lighter), #FFF);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255,140,66,0.2);
    transition: var(--transition);
}

.biz-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(255,140,66,0.15);
}

.biz-icon { font-size: 2.2rem; display: block; margin-bottom: 12px; }
.biz-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.biz-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.6; }

/* 合规说明 */
.compliance-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.compliance-item {
    display: flex;
    gap: 14px;
    padding: 24px;
    background: #F0FFF4;
    border-radius: var(--radius);
    border: 1px solid rgba(76,175,80,0.15);
    transition: var(--transition);
}

.compliance-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.compliance-item > span {
    font-size: 1.6rem;
    flex-shrink: 0;
}

.compliance-item strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.compliance-item p {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ==================== Footer ==================== */
.footer {
    background: #1A2A3A;
    color: rgba(255,255,255,0.7);
    padding: 56px 0 28px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 48px;
}

.footer-brand p {
    margin-top: 12px;
    font-size: 0.95rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    color: #fff;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.footer-col h4 {
    color: #fff;
    font-size: 0.95rem;
    margin-bottom: 14px;
}

.footer-col a {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 10px;
    transition: color 0.2s;
}

.footer-col a:hover { color: var(--accent-light); }

.footer-bottom {
    max-width: var(--max-width);
    margin: 40px auto 0;
    padding: 24px 24px 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 0.78rem;
}

.footer-bottom p { margin-bottom: 4px; }

/* ==================== 动画关键帧 ==================== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes butterflyFloat {
    0%, 100% { transform: translateY(0) rotate(-2deg); }
    50% { transform: translateY(-12px) rotate(2deg); }
}

@keyframes wingFlapLeft {
    from { transform: rotate(-20deg) scaleY(1); }
    to   { transform: rotate(-50deg) scaleY(0.6); }
}

@keyframes wingFlapRight {
    from { transform: rotate(20deg) scaleY(1); }
    to   { transform: rotate(50deg) scaleY(0.6); }
}

@keyframes sparkle {
    0%, 100% { opacity: 0; transform: scale(0.5); }
    50% { opacity: 1; transform: scale(1.2); }
}

@keyframes feedPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@keyframes feedFloat {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-40px); }
}

@keyframes countUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==================== 响应式设计 ==================== */

/* 平板 (768px - 1024px) */
@media (max-width: 1024px) {
    .hero-cards { grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .pet-layout { grid-template-columns: 1fr 1fr; }
    .pet-unlocks { grid-column: 1 / -1; }
    .museum-grid { grid-template-columns: 1fr; }
    .profile-layout { grid-template-columns: 1fr 1fr; }
    .profile-actions { grid-column: 1 / -1; flex-direction: row; flex-wrap: wrap; }
    .profile-actions .action-card { flex: 1; min-width: 180px; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .compliance-list { grid-template-columns: repeat(2, 1fr); }
    .footer-container { grid-template-columns: 1fr; gap: 32px; }

    .hero-title { font-size: 2.5rem; }
    .section-header h2 { font-size: 1.8rem; }
}

/* 手机 (< 768px) */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 260px;
        height: 100vh;
        flex-direction: column;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        padding: 80px 24px 24px;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        gap: 4px;
    }

    .nav-menu.open { right: 0; }

    .nav-toggle { display: flex; z-index: 1001; }

    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 0.95rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .hero-cards { grid-template-columns: 1fr; max-width: 360px; }

    .pet-layout { grid-template-columns: 1fr; }

    .profile-layout { grid-template-columns: 1fr; }
    .profile-actions { flex-direction: column; }

    .features-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }

    .team-grid { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto 32px; }
    .biz-grid { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto; }
    .compliance-list { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }

    .footer-container { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }

    .section-header h2 { font-size: 1.6rem; }
    .section-header p { font-size: 0.95rem; }

    .hero {
        padding: 100px 16px 60px;
        min-height: auto;
    }
}

/* 小手机 (< 480px) */
@media (max-width: 480px) {
    .hero-title { font-size: 1.7rem; }
    .section-header h2 { font-size: 1.4rem; }
    .hero-card { padding: 20px 16px; }
    .section-container { padding: 0 16px; }
}