/* ===== 全局重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #667eea;
    --primary-dark: #764ba2;
    --accent: #f5576c;
    --success: #43e97b;
    --warning: #fa709a;
    --dark: #1a1a2e;
    --gray: #888;
    --light: #f5f7fa;
    --white: #fff;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow: 0 10px 40px rgba(0,0,0,0.08);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
    --radius: 16px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: #333;
    background: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border: none;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}
.btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 8px 24px rgba(102,126,234,0.4);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(102,126,234,0.5);
}
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}
.btn-lg { padding: 16px 40px; font-size: 17px; }
.btn-block { width: 100%; justify-content: center; }
.btn-gradient {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    color: #fff;
    box-shadow: 0 8px 24px rgba(250,112,154,0.4);
}
.btn-gradient:hover { transform: translateY(-2px); }

.highlight {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 顶部公告栏 ===== */
.top-bar {
    background: var(--dark);
    color: #ccc;
    font-size: 13px;
    padding: 8px 0;
}
.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.top-bar-right { display: flex; gap: 20px; }
.top-bar-right span { display: flex; align-items: center; gap: 6px; cursor: pointer; }
.top-bar-right span:hover { color: #fff; }

/* ===== 导航栏 ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.05);
    padding: 14px 0;
}
.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 26px;
    font-weight: 800;
    color: var(--primary);
}
.logo i { font-size: 32px; }
.logo small {
    font-size: 11px;
    color: var(--gray);
    font-weight: 400;
    border-left: 1px solid #ddd;
    padding-left: 10px;
    margin-left: 4px;
}
.nav { display: flex; gap: 28px; }
.nav a {
    font-weight: 500;
    font-size: 15px;
    position: relative;
    padding: 4px 0;
    transition: color 0.3s;
}
.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s;
}
.nav a:hover::after, .nav a.active::after { width: 100%; }
.nav a:hover, .nav a.active { color: var(--primary); }

.header-actions { display: flex; align-items: center; gap: 16px; }
.btn-search, .btn-login, .btn-cart {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: #333;
    transition: color 0.3s;
}
.btn-search:hover, .btn-login:hover, .btn-cart:hover { color: var(--primary); }
.btn-cart { position: relative; }
.cart-badge {
    position: absolute;
    top: -8px; right: -8px;
    background: var(--accent);
    color: #fff;
    font-size: 11px;
    width: 18px; height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== 搜索遮罩 ===== */
.search-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
}
.search-overlay.active { display: flex; }
.search-box {
    display: flex;
    gap: 12px;
    width: 600px;
    max-width: 90%;
}
.search-box input {
    flex: 1;
    padding: 18px 24px;
    border-radius: 50px;
    border: none;
    font-size: 18px;
    outline: none;
}
.search-box button {
    padding: 0 28px;
    border-radius: 50px;
    border: none;
    background: var(--gradient);
    color: #fff;
    font-size: 20px;
    cursor: pointer;
}

/* ===== 首屏 Hero ===== */
.hero {
    position: relative;
    overflow: hidden;
    padding: 80px 0 100px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf5 100%);
}
.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(102,126,234,0.12), transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(245,87,108,0.12), transparent 40%);
}
.hero .container {
    position: relative;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: center;
}
.hero-content h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}
.hero-sub {
    font-size: 20px;
    color: var(--gray);
    margin-bottom: 40px;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}
.stat-item {
    display: flex;
    flex-direction: column;
}
.stat-num {
    font-size: 40px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}
.stat-label {
    font-size: 14px;
    color: var(--gray);
    margin-top: 6px;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

/* 浮动卡片 */
.hero-visual { position: relative; height: 420px; }
.floating-cards { position: relative; width: 100%; height: 100%; }
.float-card {
    position: absolute;
    background: #fff;
    padding: 16px 20px;
    border-radius: 14px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 4px;
    animation: float 4s ease-in-out infinite;
}
.float-card i { font-size: 28px; }
.float-card span { font-size: 13px; color: var(--gray); }
.float-card b { font-size: 16px; color: var(--accent); }
.card-1 { top: 10%; left: 0; animation-delay: 0s; }
.card-2 { top: 5%; right: 0; animation-delay: 1s; }
.card-3 { bottom: 30%; left: 10%; animation-delay: 2s; }
.card-4 { bottom: 8%; right: 10%; animation-delay: 1.5s; }
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-16px); }
}

/* ===== 通用区块标题 ===== */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}
.section-header h2 {
    font-size: 38px;
    font-weight: 800;
    margin-bottom: 12px;
}
.section-header p {
    font-size: 17px;
    color: var(--gray);
}

/* ===== 平台分类 ===== */
.categories { padding: 90px 0; }
.platform-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.platform-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all 0.35s ease;
    border: 1px solid transparent;
}
.platform-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}
.platform-icon {
    width: 72px; height: 72px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}
.platform-icon i { font-size: 34px; color: #fff; }
.platform-card h3 { font-size: 20px; margin-bottom: 8px; }
.platform-card p { font-size: 13px; color: var(--gray); margin-bottom: 12px; }
.platform-count { font-size: 14px; font-weight: 700; color: var(--primary); }
.platform-tags { display: flex; gap: 8px; justify-content: center; margin-top: 12px; flex-wrap: wrap; }
.platform-tags span {
    font-size: 11px;
    padding: 4px 12px;
    background: var(--light);
    border-radius: 20px;
    color: #666;
}
.platform-tags span.hot { background: #fff3cd; color: #d63384; font-weight: 600; }
.platform-card.featured { border: 2px solid var(--accent); position: relative; }
.platform-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -12px; left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #fff;
    font-size: 11px;
    padding: 2px 14px;
    border-radius: 20px;
    font-weight: 600;
}

/* ===== 账号列表 ===== */
.account-list { padding: 90px 0; background: var(--light); }
.filter-bar {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    background: #fff;
    padding: 20px 28px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 32px;
}
.filter-group { display: flex; align-items: center; gap: 8px; }
.filter-group label { font-weight: 600; font-size: 14px; }
.filter-group select {
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid #ddd;
    font-size: 14px;
    cursor: pointer;
    outline: none;
}
.account-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.account-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    cursor: pointer;
}
.account-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.account-img {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.account-img i { font-size: 44px; color: #fff; }
.account-badge {
    position: absolute;
    top: 12px; left: 12px;
    background: rgba(255,255,255,0.9);
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
}
.account-body { padding: 18px; }
.account-number {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 1px;
    margin-bottom: 6px;
}
.account-meta { font-size: 13px; color: var(--gray); margin-bottom: 12px; }
.account-foot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #eee;
    padding-top: 12px;
}
.account-price { font-size: 20px; font-weight: 800; color: var(--accent); }
.account-level {
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
}
.level-普通 { background: #e9ecef; color: #666; }
.level-精品 { background: #fff3cd; color: #b8860b; }
.level-典藏 { background: #f8d7da; color: #c0392b; }

.load-more { text-align: center; margin-top: 40px; }

/* ===== 核心优势 ===== */
.features { padding: 90px 0; }
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}
.feature-card {
    text-align: center;
    padding: 32px 24px;
    border-radius: var(--radius);
    background: #fff;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.feature-icon {
    width: 72px; height: 72px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
}
.feature-icon i { font-size: 30px; color: #fff; }
.feature-card h3 { font-size: 19px; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--gray); }

.diff-section {
    background: var(--light);
    border-radius: var(--radius);
    padding: 40px;
}
.diff-section h3 { text-align: center; margin-bottom: 30px; font-size: 24px; }
.diff-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.diff-item {
    display: flex;
    gap: 16px;
    align-items: center;
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}
.diff-item i { font-size: 32px; color: var(--primary); }
.diff-item h4 { font-size: 17px; margin-bottom: 4px; }
.diff-item p { font-size: 13px; color: var(--gray); }

/* ===== 交易流程 ===== */
.process { padding: 90px 0; background: var(--light); }
.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 50px;
}
.step {
    background: #fff;
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    flex: 1;
    min-width: 160px;
    position: relative;
}
.step-num {
    font-size: 40px;
    font-weight: 800;
    color: rgba(102,126,234,0.15);
    position: absolute;
    top: 8px; left: 16px;
    line-height: 1;
}
.step-icon {
    width: 60px; height: 60px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 12px auto 14px;
}
.step-icon i { font-size: 24px; color: #fff; }
.step h4 { font-size: 17px; margin-bottom: 4px; }
.step p { font-size: 13px; color: var(--gray); }
.step-arrow { color: var(--primary); font-size: 20px; }

.security-badges {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}
.sec-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}
.sec-badge i {
    width: 64px; height: 64px;
    border-radius: 50%;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: var(--primary);
    box-shadow: var(--shadow);
}
.sec-badge span { font-size: 14px; font-weight: 600; }

/* ===== 回收寄售 ===== */
.recycle { padding: 90px 0; }
.recycle-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.recycle-info h2 { font-size: 36px; font-weight: 800; margin-bottom: 14px; }
.recycle-desc { font-size: 16px; color: var(--gray); margin-bottom: 28px; }
.recycle-options { display: flex; flex-direction: column; gap: 20px; margin-bottom: 28px; }
.recycle-opt {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: var(--light);
    padding: 20px;
    border-radius: 12px;
}
.recycle-opt i { font-size: 30px; color: var(--primary); margin-top: 4px; }
.recycle-opt h4 { font-size: 17px; margin-bottom: 4px; }
.recycle-opt p { font-size: 13px; color: var(--gray); }

.recycle-form {
    background: #fff;
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}
.recycle-form h3 { font-size: 22px; margin-bottom: 24px; text-align: center; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 14px; }
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #eee;
    border-radius: 10px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s;
    font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--primary); }

/* AI 估价区域 */
.ai-estimate-section { margin-top: 20px; }
.ai-tip { font-size: 12px; color: var(--gray); text-align: center; margin-top: 8px; }
.ai-result {
    margin-top: 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf5 100%);
    border-radius: 14px;
    padding: 24px;
    border: 1px solid rgba(102,126,234,0.2);
}
.ai-result-header {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.ai-price { text-align: center; margin-bottom: 20px; }
.ai-price-label { display: block; font-size: 14px; color: var(--gray); }
.ai-price-value {
    font-size: 48px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.1;
}
.ai-details { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.ai-detail-item {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    padding-bottom: 8px;
    border-bottom: 1px dashed #ddd;
}
.ai-detail-item span:last-child { font-weight: 700; color: var(--primary); }
.ai-confidence { text-align: center; font-size: 13px; color: var(--gray); margin-bottom: 16px; }
.ai-confidence span { font-weight: 700; color: #28a745; }

/* ===== 资讯攻略 ===== */
.news { padding: 90px 0; background: var(--light); }
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.news-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.news-img {
    height: 160px;
    position: relative;
}
.news-tag {
    position: absolute;
    top: 14px; left: 14px;
    background: rgba(255,255,255,0.95);
    font-size: 12px;
    padding: 4px 14px;
    border-radius: 20px;
    font-weight: 600;
}
.news-body { padding: 20px; }
.news-body h4 { font-size: 17px; margin-bottom: 10px; line-height: 1.4; }
.news-body p { font-size: 13px; color: var(--gray); margin-bottom: 14px; }
.news-meta { display: flex; gap: 16px; font-size: 12px; color: #aaa; }
.news-meta span { display: flex; align-items: center; gap: 4px; }

/* ===== 盈利模式 ===== */
.profit { padding: 90px 0; }
.profit-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.profit-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}
.profit-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.profit-icon {
    width: 72px; height: 72px;
    border-radius: 20px;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
}
.profit-icon i { font-size: 30px; color: #fff; }
.profit-card h4 { font-size: 18px; margin-bottom: 10px; }
.profit-card p { font-size: 14px; color: var(--gray); }

/* ===== CTA ===== */
.cta {
    padding: 80px 0;
    background: var(--gradient);
    color: #fff;
    text-align: center;
}
.cta h2 { font-size: 40px; font-weight: 800; margin-bottom: 12px; }
.cta p { font-size: 18px; opacity: 0.9; margin-bottom: 30px; }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 页脚 ===== */
.footer { background: var(--dark); color: #ccc; padding: 60px 0 0; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
}
.logo-light { color: #fff; }
.footer-desc { font-size: 14px; margin: 16px 0; opacity: 0.8; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}
.footer-social a:hover { background: var(--primary); }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a:hover { color: var(--primary); }
.contact-info li { display: flex; align-items: center; gap: 10px; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    opacity: 0.7;
}
.disclaimer { font-size: 12px; margin-top: 8px; max-width: 800px; margin-left: auto; margin-right: auto; }

/* ===== 弹窗 ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 300;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal {
    background: #fff;
    border-radius: var(--radius);
    width: 460px;
    max-width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: modalIn 0.3s ease;
}
.modal-lg { width: 700px; }
@keyframes modalIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.modal-close {
    position: absolute;
    top: 16px; right: 16px;
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: #999;
    z-index: 10;
}
.modal-header { padding: 24px 24px 0; }
.modal-header h3 { display: flex; align-items: center; gap: 8px; color: var(--primary); }
.modal-body { padding: 24px; }
.modal-tip { font-size: 13px; color: var(--gray); margin-bottom: 20px; text-align: center; }

/* 账号详情 */
.detail-header {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
}
.detail-icon {
    width: 80px; height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.detail-icon i { font-size: 36px; color: #fff; }
.detail-info h3 { font-size: 24px; margin-bottom: 6px; }
.detail-info .price { font-size: 28px; font-weight: 800; color: var(--accent); }
.detail-section { margin-bottom: 20px; }
.detail-section h4 { font-size: 15px; margin-bottom: 10px; color: var(--primary); }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.detail-item { display: flex; justify-content: space-between; font-size: 14px; padding: 8px 0; border-bottom: 1px solid #eee; }
.detail-item span:last-child { font-weight: 600; }

/* ===== 回到顶部 ===== */
.back-top {
    position: fixed;
    bottom: 30px; right: 30px;
    width: 50px; height: 50px;
    border-radius: 50%;
    background: var(--gradient);
    color: #fff;
    border: none;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 90;
}
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { transform: translateY(-3px); }

/* ===== Toast 提示 ===== */
.toast {
    position: fixed;
    top: 100px; left: 50%;
    transform: translateX(-50%) translateY(-20px);
    background: var(--dark);
    color: #fff;
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 15px;
    z-index: 400;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}
.toast.show { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .hero .container { grid-template-columns: 1fr; }
    .hero-visual { height: 300px; order: -1; }
    .platform-grid, .account-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid, .profit-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .recycle-content { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 40px; }
}
@media (max-width: 768px) {
    .nav { display: none; }
    .top-bar-right { display: none; }
    .platform-grid, .account-grid, .features-grid, .profit-grid, .news-grid { grid-template-columns: 1fr; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .hero-content h1 { font-size: 32px; }
    .section-header h2 { font-size: 28px; }
    .footer-grid { grid-template-columns: 1fr; }
    .process-steps { flex-direction: column; }
    .step-arrow { transform: rotate(90deg); }
}