/* 黑色系深色主题配置 */
:root {
    --primary-blue: #3b82f6;
    --primary-green: #10b981;
    --primary-orange: #f59e0b;
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --bg-primary: #0a0a0f;
    --bg-card: rgba(17, 17, 24, 0.6);
    --bg-card-hover: #1a1a24;
    --border-color: rgba(42, 42, 58, 0.5);
    --accent-cyan: #06b6d4;
    --accent-glow: rgba(6, 182, 212, 0.3);
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-primary);
    min-height: 100vh; /* 修复了原先 height: 100vh 导致无法往下滚动的 Bug */
    padding: 0;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    position: relative;
    overflow-x: hidden;
    overflow-y: auto;
}

body::before {
    content: '';
    position: fixed;
    top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at 20% 10%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.06) 0%, transparent 35%),
                radial-gradient(circle at 40% 80%, rgba(6, 182, 212, 0.04) 0%, transparent 45%);
    pointer-events: none; z-index: 0;
}

/* 顶部导航栏 */
.navbar { position: fixed; top: 0; left: 0; right: 0; height: 60px; background: rgba(10, 10, 15, 0.6); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); display: flex; align-items: center; justify-content: space-between; padding: 0 30px; z-index: 100; }
.logo { font-size: 20px; font-weight: 700; background: linear-gradient(135deg, var(--accent-cyan), var(--primary-blue)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -0.5px; }
.nav-links { display: flex; gap: 20px; align-items: center; }

/* 语言切换器 */
.lang-switcher { position: relative; }
.lang-switcher select { appearance: none; background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 20px; padding: 6px 28px 6px 14px; font-size: 13px; color: var(--text-primary); font-weight: 500; outline: none; cursor: pointer; }
.lang-switcher::after { content: ''; position: absolute; right: 12px; top: 50%; transform: translateY(-50%); width: 10px; height: 10px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E"); background-repeat: no-repeat; background-size: contain; pointer-events: none; }
.lang-switcher select option { background: #1a1a24; color: var(--text-primary); }

/* 主内容区 */
.main-container { padding-top: 60px; flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; position: relative; z-index: 1; padding-bottom: 40px; }
.hero-section { width: 100%; max-width: 600px; padding: 20px 20px 16px; text-align: center; }
.badge { display: inline-flex; align-items: center; gap: 6px; background: transparent; border: 1px solid rgba(6, 182, 212, 0.4); padding: 8px 20px; border-radius: 50px; font-size: 14px; color: var(--accent-cyan); font-weight: 500; margin-bottom: 20px; }
.badge svg { width: 14px; height: 14px; stroke: var(--accent-cyan); }
.hero-title { font-size: 42px; font-weight: 800; margin-bottom: 12px; background: linear-gradient(135deg, #ffffff 0%, #a5f3fc 50%, #67e8f9 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -1px; }
.hero-subtitle { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.hero-subtitle span { display: flex; align-items: center; gap: 6px; }
.hero-subtitle span svg { width: 14px; height: 14px; stroke: var(--accent-cyan); }

/* 核心卡片 */
.card { width: 100%; max-width: 480px; padding: 32px; text-align: center; position: relative; z-index: 1; background: rgba(255, 255, 255, 0.02); border: 1px solid rgba(255, 255, 255, 0.06); border-radius: 20px; backdrop-filter: blur(10px); box-shadow: 0 0 40px rgba(6, 182, 212, 0.08), 0 0 80px rgba(6, 182, 212, 0.04), inset 0 1px 0 rgba(255, 255, 255, 0.05); }
.notice-box { color: var(--accent-cyan); font-size: 14px; font-weight: 500; line-height: 1.5; margin-bottom: 20px; text-align: center; opacity: 0.9; }
.loading-area { margin-bottom: 20px; }
.loading-text { font-size: 13px; color: var(--text-secondary); margin-bottom: 12px; font-weight: 400; }
.progress-bar-bg { background-color: rgba(255, 255, 255, 0.05); border-radius: 10px; height: 6px; width: 100%; overflow: hidden; position: relative; }
.progress-bar-fill { background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan)); height: 100%; width: 0%; border-radius: 12px; transition: width 0.1s linear; box-shadow: 0 0 15px rgba(6, 182, 212, 0.5); }
.result-area { display: none; margin-bottom: 20px; }
.success-title { font-size: 16px; font-weight: 600; color: var(--primary-green); margin-bottom: 20px; text-shadow: 0 0 20px rgba(16, 185, 129, 0.3); letter-spacing: 1px; }

/* 钱包地址框 */
.wallet-address-box { background: rgba(255, 255, 255, 0.02); border: 1px solid var(--border-color); padding: 20px 48px 20px 20px; border-radius: 16px; font-family: 'SF Mono', Monaco, monospace; font-size: 15px; color: var(--text-primary); word-break: break-all; margin-bottom: 20px; font-weight: 500; letter-spacing: 0.5px; text-align: left; position: relative; transition: all 0.3s; }
.wallet-address-box:hover { border-color: rgba(6, 182, 212, 0.3); background: rgba(255, 255, 255, 0.05); }
.wallet-address-box .copy-icon { position: absolute; right: 16px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; cursor: pointer; opacity: 0.5; transition: opacity 0.2s ease; }
.wallet-address-box .copy-icon:hover { opacity: 1; }
.wallet-address-box .copy-icon svg { width: 100%; height: 100%; stroke: var(--text-secondary); }

/* 倒计时与按钮 */
.timer-display { text-align: center; font-size: 14px; color: var(--text-secondary); margin-top: 16px; margin-bottom: 12px; font-weight: 500; }
.btn-group { display: flex; gap: 8px; justify-content: center; }
.btn-base { color: var(--accent-cyan); padding: 16px; font-size: 15px; font-weight: 600; cursor: pointer; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); margin-bottom: 12px; position: relative; overflow: hidden; border: 1px solid rgba(6, 182, 212, 0.4); border-radius: 12px; display: flex; align-items: center; justify-content: center; gap: 8px; background: transparent; width: 100%; }
.btn-base::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent); transition: left 0.5s; }
.btn-base:hover { background: var(--bg-card-hover); text-shadow: 0 0 8px var(--accent-glow), 0 0 16px var(--accent-cyan); }
.btn-base:hover::before { left: 100%; }
.btn-base:active { transform: scale(0.96); }

/* 底部绿色提示 */
.footer-tip { margin-top: 28px; padding: 8px 10px; background: linear-gradient(135deg, rgba(34, 197, 94, 0.12) 0%, rgba(21, 128, 61, 0.18) 100%); border: 1px solid rgba(74, 222, 128, 0.25); border-radius: 28px; display: flex; align-items: center; justify-content: center; gap: 6px; }
.footer-tip-icon { width: 36px; height: 36px; background: linear-gradient(135deg, #22c55e52 0%, #16a34a57 100%); border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: #7bff47; }
.footer-tip-icon svg { width: 18px; height: 18px; }
.footer-tip-content { display: flex; white-space: nowrap; align-items: center; gap: 4px; }
.footer-tip-text { font-size: 12px; color: rgba(255, 255, 255, 0.7); font-weight: 400; }
.footer-tip-highlight { font-size: 14px; color: #4ade80; font-weight: 600; }
.footer-tip-save { font-size: 12px; color: #4ade80; font-weight: 400; }

/* FAQ区域 */
.faq-section { width: 100%; max-width: 560px; margin: 40px auto 0; padding: 0 20px; }
.faq-section-title { display: flex; align-items: center; justify-content: center; gap: 10px; font-size: 20px; font-weight: 600; color: var(--text-primary); margin-bottom: 20px; }
.faq-section-title svg { width: 24px; height: 24px; stroke: var(--accent-cyan); }
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: rgba(255, 255, 255, 0.03); border: 1px solid rgba(255, 255, 255, 0.06); border-radius: 12px; padding: 16px; }
.faq-question { display: flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 500; color: var(--text-primary); margin-bottom: 10px; }
.faq-q-icon { width: 28px; height: 28px; background: rgba(6, 182, 212, 0.1); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--accent-cyan); }
.faq-q-icon svg { width: 16px; height: 16px; }
.faq-answer { font-size: 13px; color: var(--text-secondary); line-height: 1.6; padding-left: 38px; }
.faq-footer { margin-bottom: 16px; padding: 12px 16px; background: rgba(6, 182, 212, 0.05); border: 1px solid rgba(6, 182, 212, 0.15); border-radius: 10px; font-size: 12px; color: var(--accent-cyan); text-align: center; }

/* 页脚 */
.footer-section { margin-top: auto; padding: 40px; text-align: center; color: var(--text-muted); font-size: 13px; }

/* 响应式 */
@media (max-width: 768px) {
    .navbar { padding: 0 16px; } .nav-links { gap: 12px; } .lang-switcher select { padding: 5px 24px 5px 10px; font-size: 12px; }
    .hero-section { padding: 40px 20px 30px; } .hero-title { font-size: 36px; } .card { max-width: calc(100vw - 40px); padding: 24px; margin: 0 20px; }
}